Research Group for Flexible Technologies (Nakada/Furukawa/Yuki/Koden)

Academia-Industry Cooperation“Needs First”
Research Group for Flexible Technologies(Nakada/Furukawa/Yuki/Koden)

Professor
Hitoshi Nakada

Associate Professor
Tadahiro Furukawa

Associate Professor
Dr. Toshinao Yuki

Mission and Activity

p.2～3

Consortium（YU-FIC, YU-FLEC）

p.4～5

Background technologies
・OLED device fabrication
・Evaluation of OLED materials and devices
・Evaluation of barrier properties
・R2R (Roll-to-roll) and printing technologies

p.6
p.7
p.8
p.9

Professor
Dr. Mitsuhiro Koden“Award from Minister ofState for Science andTechnology Policy”
Cabinet Office,
Government of Japan (2017)

Developed technologies
・Flexible OLEDs on ultra-thin glass
p.10
・Flexible OLEDs on stainless steel foil
p.11
・R2R fabrication of barrier film with transparent electrodep.12
・Package with OLEDs fabricated by printing
p.13
・Free form electronics
p.14
・High temperature tolerant barrier films for flexible OLEDs
p.15
・Non-ITO transparent electrode with implanted metal-mesh structure p.16
・Optical simulation
p.17
・Barrier layer by ALD (Atomic layer deposition)
p.18
・TFE (Thin Film Encapsulation) technologies for OLEDs
p.19
・PSA encapsulating technologies for OLEDs
p.20
・Printed flexible OPV fabricated by R2R processes
p.21
・Inorganic barrier layers for OLEDs
p.22

Topics/Publications

p.23

Members

p.24

Homepage： https://inoel.yz.yamagata-u.ac.jp/F-consortium/home-e.html

Research Group for Flexible Technologies (Nakada/Furukawa/Yuki/Koden)
Activity

Mission and Activity

In flexible organic electronics technologies, we offer academia-industry collaboration with
“Needs First”, in which needs and requests from collaborating companies are first priority.
We contribute R&Ds of the collaborating companies, aiming at practical technologies andactual businesses.
Our activity with “Needs First” was awarded from Minister of State for Science andTechnology Policy, Government of Japan in 2017.
(Main technologies)■ OLED devices and processes■ OPV processes■ Materials and components for flexible organic electronics■ Flexible substrates (ultra-thin glass, stainless steel foil, barrier film, etc.)■ Barrier technologies / Barrier evaluation and analysis“Award from Minister of State for■ Flexible encapsulating technologies
Science and Technology Policy”■ Printing and roll-to-roll (R2R) technologies for flexible organic electronics
Cabinet Office,
Government of Japan (2017)■ Device and process technologies of next-generation materials
Commercialization(Install to actual
products)

Company's
technology
Collaboration with
Yamagata University✓ Experts for practical development✓ Evaluation in terms of practicaldevices✓ Prototype using G1 substrate✓ Feedback of all data andprototype samples to thecollaborating company.

Unique points

Collaborations

・ “Needs First” (Business First)
・Device fabrication with collaborating
Company’s needs are first priority. company’s technologies and feedbackof all results to the company
・ Merits in IPs
・ Self‐supporting accounting system ・Data for proofing potential of theAn unique model based ontechnologies of collaborating company.
collaboration with industry
・Prototype samples
・Coordination of plural companies
・Individual collaboration / Consortium /International collaboration

Activities

Skills of members
・Substantial experience in thepractical development at previous
companies.
・ Rich knowledge on organic
electronics (OLEDs etc.), displays,
flexible, R2R, printing, etc.
・Rich information about trends oftechnologies and businesses.
・Rich human network in academic
society and industrial fields.

⚫ Academia-Industry Cooperation Consortium (p.3～p.5)
1) Yamagata University Flexible Electronics Japan-Germany International Collaborative
Practical Utilization Consortium (YU-FIC) [Oct. 2017～Mar. 2021] (p.4)
2) Yamagata University Flexible Electronics Consortium for Academia-Industry Cooperation(YU-FLEC) [Jan. 2018～Mar. 2023] (p.5)⚫ National Project (p.3)⚫ Individual Collaboration⚫ Evaluation support (p.8)
WVTR (Water Vapor Transmission Rate) evaluation with MORESCO

2

Research Group for Flexible Technologies (Nakada/Furukawa/Yuki/Koden)
Activity

Academia-Industry Collaboration “Needs First!”
Based on the concept of “Needs First”, we promote academia-industry
collaboration consortiums and participate various national projects.

Academia-Industry Collaboration Consortium
FY2013

FY2014FY2015FY2016“Award from Minister of Statefor Science and Technology
Policy”, Cabinet Office,
Government of Japan (2017)

Prof. Koden

FY2017FY2018Supported by MITI

FY2020

FY2021

FY2022

Mr. Furukawa
Yamagata University Flexible
Electronics Japan-Germany
International Collaborative PracticalUtilization Consortium (YU-FIC)

Yamagata University Organic
Thin Film Device Consortium
21 companies
Dexerials, DIC, DNP, FEBACS, JNC,
Kaneka, KOBELCO, Koito
Manufacturing, Komori Machinery,
Merck Performance Materials
Manufacturing, Mitsubishi
Materials, Mitsubishi Plastics, NEC
Lighting, Nippon Electric GlassNIPPON STEEL & SUMITOMOMETAL / NIPPON STEEL &SUMIKIN MATERIALS, Okura
Industrial, SERIA, Shin-Etsu
Chemical, Taiyo Kikai, Teijin, ZEONFY2019Profs. Nakada & Koden
Yamagata University
Flexible Organic Electronics
Practical Key Technology
Consortium（YU-FOC）
10 companies
FEBACS, Kaneka, The
Japan Steel Works, NEC
Lighting, Nippon Electric
Glass, Nippon Steel &Sumitomo Metal / Nippon
Steel & Sumikin Materials,
SERIA, Shin-Etsu Chemical,
TOYO INK, Teijin

National Projects

3

15 companies
FUJIKURA KASEI, The Japan Steel Works,
KEIHIN RAMTECH, KOMORI,
Mitsubishi Chemical, Mitsuboshi DiamondIndustrial, Nippon Electric Glass,
Nippon Steel Chemical & Material,
SEIEIDO Printing, SERIA ENGINEERING,
SurFtech, TAKEDA PRINTING, TEIJIN,Tokyo Process Service, WIREDGATE

Dr. Yuki
Yamagata University Flexible Electronics
Consortium for Academia-Industry Cooperation(YU-FLEC)
15 companies

Supported by MEXT

Research Group for Flexible Technologies (Nakada/Furukawa/Yuki/Koden)
Consortium

Yamagata University Flexible Electronics Japan-Germany
International Collaborative Practical Utilization Consortium (YU-FIC)
Yamagata University Flexible Electronics Japan-Germany International Collaborative
Practical Utilization Consortium (YU-FIC) collaborates with companies and institutes inGermany, aiming at novel flexible electronics products.

Participants

Project term

15 Companies

October 2017 ～ March 2021

FUJIKURA KASEI CO., LTD.
KEIHIN RAMTECH CO., LTD.
Subjects
KOMORI Corporation
Mitsubishi Chemical Corporation➢ LAOLA: Large Area Organic Lighting
Mitsuboshi Diamond Industrial Co., Ltd.
Applications on flexible substrates
NipponElectric
Glass
Co.,
Ltd.
➢ IonT: Internet on Things - Intelligent OLED-OPV
NIPPON STEEL Chemical & Material Co., Ltd.
based signage for interactive advertisement➢ F2E: Free Form Electronics - Freedom in design Seieido Printing Co., Ltd.
SERIA ENGINEERING, INC.
by thermo-formed printed electronics
SurFtech Transnational Co., Ltd.
TAKEDA PRINTING CO., LTD.
Leaders
TEIJIN LIMITED➢ Project leader: Associate Prof. T. Furukawa
Tokyo Process Service Co., Ltd.
➢ Fellow: Prof. T. Takahashi
The Japan Steel Works, LTD.
➢ Secretary: Prof. M. Koden
WIREDGATE Inc.
(Jan. 2020)

Collaboration with German activity

YU-FIC collaborates with 24 German companies and institutes which are organized by Organic
Electronics Saxony (OES), having twice visits a every year, respectively.

Activity

Germany (Nov. 2017)

Germany (Sep. 2018)

LOPEC/Germany (Mar. 2019)

Flex Japan 2019 (May 2019)

Related program⚫ JST: OPERA Program Grant Number JPMOP1614 [FY2016～FY2020].
⚫ MEXT: Construction Program of Open Innovation Organization [FY2018～FY2022].
⚫ MEXT: Regional Innovation Eco-system Program [FY2018～FY2022].

Web pages⚫ Home page： https://inoel.yz.yamagata-u.ac.jp/yu-fic-en/⚫ You Tube： https://www.youtube.com/watch?v=ybZVgQkVVJI&feature=youtu.be

4Japan (Feb. 2019)

Germany (Sep. 2019)

Research Group for Flexible Technologies (Nakada/Furukawa/Yuki/Koden)
Consortium

Yamagata University Flexible Electronics
Consortium for Academia-Industry Cooperation (YU-FLEC)
Yamagata University Flexible Electronics Consortium for Academia-Industry
Cooperation (YU-FLEC) is constructed by one-by-one collaborations with individualcompanies, promoting practical development based on the concept of “Needs First”.
We would appreciate it if you are interested in YU-FLEC.

Mission and Subjects

Unique points➢ Academia-industry collaboration led byscientists having rich experience in actual
businesses➢ Large size equipment for various prototypes➢ Creation of business competitiveness

Practical R&D in flexible electronics
・Flexible substrates
・Flexible encapsulation and barrier
・Novel electrodes
・Process technologies
・Next-generation materials and devices

Project term

Main applications➢ Small flexible OLED displays (mobile, etc.)➢ Large size OLED displays (TV, etc.)➢ Flexible OLED lighting

January 2018 ～ March 2023

Leaders➢ Project leader: Associate Prof. T. Yuki
➢ Fellow: Prof. H. Nakada➢ Secretary: Prof. M. Koden

Participants (total)
15 Companies (January 2020)

Activities◼ Application of flexible substrates to OLEDs
・Stainless steel foil (p.11)
・Barrier film with high temperature tolerance (p.15)◼ Flexible encapsulation
・TFE (Thin Film Encapsulation) (p.19)
・Encapsulating materials (p.20)
・Laminating encapsulation◼ Non-ITO transparent electrode・Metal mesh electrode (p.16)◼ Novel materials for emission devices
・Evaporation materials
・Solution materials◼ Novel emission devices◼ Novel components for organic electronics◼ Equipment for organic electronics

Related program⚫ MEXT: Construction Program of Open Innovation Organization [FY2018～FY2022].

Seminar
Web pages⚫ 1st YU-FLEC seminar (Aug. 2019 Tokyo).
⚫ Home page： https://inoel.yz.yamagata-u.ac.jp/yu-flec-en/⚫ YouTube： https://www.youtube.com/watch?v=qYumaF1W2Ss&feature=youtu.be5Research Group for Flexible Technologies (Nakada/Furukawa/Yuki/Koden)
Backgroundtechnologies

OLED Device Fabrications

Various types of OLED devices are able to be fabricated, based on the requests fromcollaborating companies. The fabricated OLED devices are utilized for technologicalevaluations, prototype samples, etc.

Materials

Processes for organic layers

Various types of OLED materials shown below
・Dry process: Vacuum evaporation
can be applied to OLED devices.
・Solution process: Spin-coat, Ink-jet, Spray, etc.
・Small molecular OLED materials
・Polymer OLED materials
・Fluorescent, phosphorescent and TADF materials
・Quantum dot (QD) materials

Device structures

Vacuum evaporation

Ink-jetSpin-coat

Wet cleaning

Plasmacleaner

Various types of OLED devices can be fabricated.
・Bottom emitting OLED Cathode
CathodeCathode
EIL
EIL
EIL
ETL
ETL
ETL
・Top-emitting OLED
EML
EML
EML
HTL
HTL
HTL
・Transparent OLED
HIL
HIL
HIL
Anode
Anode
Anode
(Both side emitting)
Substrate
Substrate
Substrate
Bottom emission

Top emission

Spray

Both-side emission(Transparent)

Barrier layers

Encapsulations

Various encapsulating technologies are applied.
・Common encapsulation with desiccant・Laminating encapsulation

・Inorganic barrier layer: CVD, Sputtering, ALD
・Inorganic/organic alternative stacking barrier
layer

R2R sputtering & CVD

DesiccantN2
CathodeOrganic layers
Anode

ALD
(Atomic Layer Deposition)

Substrate

Sealant

Sealant

Counter Glass substrate

Sheet-type lamination

Flexible substrate

Resin
CathodeOrganic layers

Anode

Sputtering

Ink-jetFlexible substrate

Large size OLEDs

Flexible OLEDs

Large size OLED devices can be fabricated.
The maximum substrate size: 30cm×30cm

OLED vacuum evaporationequipment “ELVESS” (Tokki)

Roll-type lamination

Flexible OLED devices with various designs canbe fabricated.

6

Research Group for Flexible Technologies (Nakada/Furukawa/Yuki/Koden)

Evaluation of OLED
Materials and Devices

Backgroundtechnologies

OLED devices with various technologies (materials, components, device architectures,processes, equipment, etc.) of collaborating companies are evaluated from practical points ofview. All evaluating results are feedbacked to the collaborating company and can be utilized
A170728A1-1
A170728A2-1
A17072for not only the next development but also the demonstration to their customers.

無し
Emission
あり uniformity

SCP-063
Deviceありcharacteristics

Uniform emission

Non-uniform emission
with defects

1.0E+01
1.0E+00
1.0E-01
1.0E-02
1.0E-03

1.0E-04
1.0E-05
1.0E-06

0

2

4

6

Wavelength
Current
density (nm)(mA/cm2)

Voltage (V)I-V characteristics

Driving lifetime

Emission spectrum

Storage lifetime

The reduction of emission intensity of OLED
devices under constant current driving isevaluated.
Luminance (normalized)

11.0E+03
0.9
0.8
1.0E+020.7
0.6
0.51.0E+01
0.4
0.3
1.0E+00
0.2
0.1
0 1.0E-01
300 1.0E-03
400 1.0E-02 500
600
700 1.0E+02
800
1.0E-01 1.0E+00
1.0E+01

Luminance (cd/m2)

2mm

1.0E+04

1.0E+02

Intensity (A.U.)

2mm

・OLED device characteristics are evaluated.
* I-V characteristics* L-I characteristics* Emission spectrum, etc.
Current density (mA/cm2)

・Emission quality such as uniformity, defects,
etc. of OLED devices are evaluated by visual
microscopic observations.

SCP
無The change of emission is observed after storage
test with high temperature and high humidity.

100%
80%
60%

40%
20%
0%

0

500

1000 1500 2000
Time (hour)

2500

3000

Initial emission(No defect)

Driving lifetime

Others

Bending tests

Other evaluations can be used, based on therequest from collaborating companies.
(Example)・Ionization potential
・Defect analysis
・SEM, AFM
・3D profile

The influences of various bending stress on
device characteristics, lifetime, etc. areevaluated using bending equipment.

37.2μmU-shape sliding

Emission after storage
test (Dark spot)

43.4μmFolding

Ionization
potential

Both-side
bending

7

38.4
AFM

Hybridconfocalmicroscopy

Research Group for Flexible Technologies (Nakada/Furukawa/Yuki/Koden)
Backgroundtechnologies

Evaluation of Barrier Properties

Evaluation of barrier properties is very important in flexible organic electronics
technologies. We provide two evaluation methods which are “Calcium corrosion method”
and “MA method (Modified differential pressure method with an Attached support)”.

Ca corrosion method✓ Ca corrosion method evaluates the optical change in Ca reflectivity which changes by the reaction of
Ca and H2O. This method is useful for the evaluation of defects in barrier layer.
✓ WVTR (Water Vapor Transmission Rate) is calculated from the evaluation results of Ca corrosion
method.
Glass substrate
Wax

Al (1mm)
Ca (100nm)
Barrier layer
Flexible substrate

Microscopic observation of Ca corrosion
Ca corrosion method (40℃90%RH)
0.5

Defect area (%)

Structure of Ca corrosion device

WVTR=1.3×10-5g/m2/day

0.4
0.3
0.2
0.1
0
0

200

400

600

800

1000

1200

Storage tine (Hour)

Evaluation equipment of Ca corrosion

MA method

WVTR calculation from Ca corrosion test

WVTR (Water Vapor Transmission Rate) evaluation(Collaborating with MORESCO)➢ We provide WVTR (Water Vapor Transmission Rate) evaluation, using the WVTR measurement equipment“Super Detect” of MORESCO.
➢ The “Super Detect” utilizes the MA method (Modified differential pressure method with an Attached support)
developed by the collaboration of MORESCO and AIST (National Institute of Advanced Industrial Science andTechnology).
➢ The MA method reduces measurement time of high gas barrier film such as better than 10-4 g/(m2 day), which arerequired in flexible OLED, OPV, etc. For example, the “Super Detect” requires only about 20 hours for the WVTR
measurement of barrier films with the order of 10-5 g/(m2 day), for which the previous methods require about 100
hours. It should be noticed that the measurement time of the “Super Detect” is only 1/5 of previous methods.
➢ In addition, the “Super Detect” is able to evaluate wide ranges of WVTR such as 10+1~10-7 g/(m2 day).
➢ The “Super Detect” with the MA method is able to warrant the WVTR value by the attached compensating unit
developed by AIST.
➢ Moreover, the “Super Detect” is able to evaluate the transmission rate of
not only water vapor but also various gasses.
Storage: 40℃/90%RH

1.0E+00

1.1×10-1 (g/m2/day)

WVTR (g/m2/day)

1.0E-01
1.0E-022.3×10-4 (g/m2/day)
4.4×10-5 (g/m2/day)

1.0E-03
1.0E-04
1.0E-05

4.6×10-5 (g/m2/day)

WVTR equipment(MA method)

1.0E-06

0.0

50.0
100.0
Storage time (hr)

150.0

8

Research Group for Flexible Technologies (Nakada/Furukawa/Yuki/Koden)
Backgroundtechnologies

Roll-to-roll (R2R) and Printing
Technologies

We provide roll-to-roll (R2R) and printing technologies, aiming at an innovation of
productions in flexible organic electronics.

Roll-to-roll (R2R)
Four types of unique roll-to-roll (R2R) equipment are utilized for fabrications of electrodes, barrier
layers, organic layers, etc.
・Substrate width：30cm
・Substrate: ultra-thin glass, stainless steel foil, flexible film

R2R sputtering&CVD(KOBELCO)

R2R screen printing
and slit-coating(SERIA)R2R gravure offset andflexography printing(Komori Machinery / Taiyo Kikai)

R2R wet cleaning(FEBACS)

Printing / Coating
Various printing and coating equipment can be utilized for printing tests and device fabrications.

Screen printing

Flexography andgravure offset printing

Ink-jetSpin-coating

Evaluation

Process technologies
Various equipment for process
technologies can be used.

Spray

Various evaluationequipment are used for
R&D of printing and rollto-roll (R2R) technologies.
Contact angle measurement

Cutting Machinefor Ultra-thin Glass

3D Forming Machine

Precise position
detector

9

Viscoelasticity
measurement

Hybridconfocalmicroscopy

Research Group for Flexible Technologies (Nakada/Furukawa/Yuki/Koden)
Developed
technology

Flexible OLEDs装置
on Ultra-thin Glass

We develop flexible OLED lighting devices on ultra-thin glass with electrodes
fabricated by roll-to-roll (R2R) technologies.
※LAOLA (Large Area Organic Lighting Applications on flexible substrates) project in Yamagata University Flexible Electronics
Japan-Germany International Collaborative Practical Utilization Consortium (YU-FIC)

Technological features◼ Roll-to-roll (R2R) fabrication of electrodes on ultra-thin glass
Ultra-thin glass (Thickness: 50μm)◼ Unique glass cutting technology with no damage
Ultra thin glass (50mm)
Barrier resin
CathodeOrganic layers(plural layers)

TCO deposition (R2R sputtering)

Insulator(with particle)
Ag

Printing of etching paste (R2R screen printing)
TCO patterning (R2R wet cleaning)
Printing of Ag electrode (R2R screen printing)Printing of insulator (R2R screen printing)

TCO (Transparent conducting oxide)
Ultra thin glass (50mm)

Cutting
OLED device

Key technologies

Prototype OLEDs
Gap = 0No distortion of stencil mask

Stable (Even) peel off

Good accuracy of print dimensions and printing quality
Our machine(gap=0)Conventional machine（gap=1.5mm）
30μm LineUltra-thin glass

Gap-less screen printing equipment(Nippon Electric Glass)(SERIA ENGINEERING)

Screen mask

Conducting ink(Tokyo Process Service)(FUJIKURA KASEI)Collaboration

Cutting (Mitsuboshi
Diamond Industrial)

Nippon Electric Glass, SERIA ENGINEERING, Tokyo Process Service,
FUJIKURA KASEI, Mitsuboshi Diamond Industrial

Related program⚫ Yamagata University Flexible Electronics Japan-Germany International Collaborative Practical Utilization Consortium (YU-FIC)[Oct. 2017～Mar. 2021].
⚫ JST: OPERA Program Grant Number JPMOP1614 [FY2016～FY2020].
⚫ MEXT: Construction Program of Open Innovation Organization [FY2018～FY2022].
⚫ MEXT: Regional Innovation Eco-system Program [FY2018～FY2022].

Publication⚫ Nippon Electric Glass; “FINETECH JAPAN 2019” (2019), “JFlex 2019” (2019), “FINETECH JAPAN 2018” (2018).
⚫ Mitsuboshi Diamond Industrial; “FINETECH JAPAN 2019” (2019), “2019 FLEX Japan”(019), “FINETECH JAPAN 2018” (2018).
⚫ T. Nakagaki, T. Kawabata, H. Takimoto, T. Furukawa, IDW’19, FLXp1-9L (2019). “Scribing Tool and Cutting Method for Ultra-thin Glass”⚫ SERIA ENGINEERING; “2019 EXPO SERIA” (2019).
⚫ FUJIKURA KASEI, Nippon Electric Glass, SERIA ENGINEERING; International Workshop on Flexible Electronics and Sensors (2019).
⚫ Tokyo Process Service; “2019 FLEX Japan” (2019).
⚫ Yamagata University；”Flex Japan 2019” (2019), “LOPEC” (2019), “JFlex 2019” (2019).
⚫ T. Furukawa, M. Koden, IEICE Trans. Electron, E100-C, 949-954 (2017).
“Novel roll-to-roll deposition and patterning of ITO on ultra-thin glass for flexible OLEDs”

10Research Group for Flexible Technologies (Nakada/Furukawa/Yuki/Koden)

Flexible OLEDs
on Stainless Steel Foil

Developed
technology

We develop flexible OLED devices on stainless steel foil (thickness: 50μm) of
NIPPON STEEL CORPORATION GROUP.
※ YU-FLEC※LAOLA project in YU-FIC

Technological features◼ Advantages of stainless steel foils of NIPPON STEELCORPORATION GROUP
・Thickness: 50μm
・Excellent surface smoothness（Ra～0.6nm）
・Excellent temperature and process resistances
・High gas barrier ability
Stainless steel foil

Developed technologies◼ Flexible OLED on stainless steel foil
Electrode (reflective anode) is fabricated on stainless steel foil by roll-to-roll (R2R)
photolithography-free processes
NIPPON STEELCORPORATIONGroup
R2R stainlesssteel foil

Electrode fabrication by R2R Processes(Photolithography free)R2R vacuum deposition
equipment (KOBELCO)
Wet
cleaning

R2R screen printing equipment(SERIA ENGINEERING)Ag alloy/ TCO
SputteringWetcleaning

Printing of
etching pasteWetcleaning

Cutting / OLED
device fabrication

R2R wet-cleaning equipment (FEBACS)(TCO: Transparent Conducting Oxide)

Flexible OLED lighting prototypes on stainless steel foil of
NIPPON STEEL CORPORATION GROUP
Collaboration

NIPPON STEEL CORPORATIONNIPPON STEEL Chemical & Material Co., Ltd.

Related program⚫ Yamagata University Flexible Electronics Consortium for Academia-Industry Cooperation (YU-FLEC) [Jan. 2018～Mar. 2023].
⚫ Yamagata University Flexible Electronics Japan-Germany International Collaborative Practical Utilization Consortium (YUFIC) [Oct. 2017～Mar. 2021].
⚫ MEXT: Construction Program of Open Innovation Organization [FY2018～FY2022].

Publication⚫ Y. Hagiwara, T. Furukawa, T. Yuki, S. Yamaguchi, N. Yamada, J. Nakatsuka, M. Koden, H. Nakada, IDW’17, FLXp1-9L(2017). “Rollto-Roll Patterning of Reflective Electrode on Planarized Stainless Steel Foil”⚫ M. Koden, T. Furukawa, T. Yuki, H. Kobayashi, H. Nakada, IDW/AD’16, FLX3-1 (2016).
“Substrates and Non-ITO Electrodes for Flexible OLEDs”⚫ Y. Hagiwara, H. Itoh, T. Furukawa, H. Kobayashi, S. Yamaguchi, N. Yamada, J. Nakatsuka, M. Koden, H. Nakada, IDW/AD’16, FLXp15 (2016). ”Roll-to-Roll Processing of Silver/ITO Continuous Deposition on Planarized Stainless Steel Foil”

11Research Group for Flexible Technologies (Nakada/Furukawa/Yuki/Koden)
Developed
technology

Roll-to-Roll (R2R) Fabrication of Barrier
Film with Transparent ElectrodeWe develop fabrication technologies of gas barrier layer and transparent electrodeon flexible film, using roll-to-roll (R2R) PE-CVD (Plasma Enhanced Chemical
Vapor Deposition).

Technological features◼ Roll-to-roll (R2R) PE-CVD deposition of gas barrier layer on flexible films◼ High barrier ability with WVTR (Water Vapor Transmission Rate) of the order of 10-6g/m2/day◼ High gas barrier films with transparent electrode

Developed technologies◼ Roll-to-roll (R2R) photolithography-free fabrication of barrier layer and transparent
electrode on flexible films
Wax

R2R processes of barrier layer and transparent electrode（Teijin）

R2R
PEN film

R2R vacuum deposition
Equipment （KOBELCO）
Wet
cleaning

CVD of SiOx
barrier layer

R2R screen printing equipment（SERIA ENGINEERING）

IZO
sputtering

Printing of
etching pasteWetcleaning

R2R wet-cleaning equipment（FEBACS）

Al (1mm)

Ca testCutting

OLED

Ca (100nm)
IZO
SiOx barrier layer
Flexible substrate

Flexible film
Barrier layer
Barrier resin
CathodeOrganic layers(plural layers)

IZO
SiOx barrier layer
PEN film◼ High gas barrier property ◼ Flexible OLED devices(WVTR: 6.3×10-6g/m2/day)
Flexible film
Barrier layer
Barrier resin
CathodeOrganic layers(plural layers)

IZO
SiOx barrier layer
PEN film

Ca corrosion device after 616 hours
under 40℃/90%RH(Thickness of barrier layer: 720nm)
Collaboration

TEIJIN LIMITED, Tosoh Corporation

Insulator

Related program⚫ Yamagata University Flexible Organic Electronics Practical Key Technology Consortium (YU-FOC)[Apr. 2016～Mar. 2019].
⚫ Yamagata University Flexible Electronics Japan-Germany International Collaborative Practical Utilization Consortium (YUFIC) [Oct. 2017～Mar. 2021].
⚫ JST: OPERA Program Grant Number JPMOP1614 [FY2016～FY2020].
⚫ MEXT: Construction Program of Open Innovation Organization [FY2018～FY2022].

Publication⚫ Yamagata University；”Flex Japan 2019” (May 2019 / Tokyo), “LOPEC” (Mar. 2019 / Germany), “JFlex 2019” (Jan. 2019 / Tokyo).
⚫ K. Taira, Taiga Suzuki, W. Konno, H Chiba, H. Itoh, M. Koden, T. Takahashi, T. Furukawa, IDW’18, FLX2-4L (2019).
“Development of High Gas Barrier Film Using Novel Precursor by Roll to Roll PECVD”⚫ T. Suzuki, W. Konno, K. Taira, H Chiba, H. Itoh, M. Koden, T. Takahashi, T. Furukawa, IDW’18, FLXp1-10L (2019).
“High Gas Barrier Films with Heterogeneous Multilayer”⚫ K. Taira, T. Furukawa, N. Kawamura, M. Koden, T. Takahashi, IDW’17, FLXp1-8L (2018). “High gas barrier film for OLED”

12

Research Group for Flexible Technologies (Nakada/Furukawa/Yuki/Koden)

Package with OLEDs
fabricated by printing (IonT)

Developed
technology

We develop printing technologies of inexpensive flexible OLED devices for
packages, etc., aiming at the application of organic electronics products toadvertisement.
※ IonT (Internet on Things - Intelligent OLED-OPV based Signage for interactive Advertisement) project inYamagata University Flexible Electronics Japan-Germany International Collaborative Practical Utilization
Consortium (YU-FIC)

Technological features◼ Flexible OLEDs by inexpensive printing◼ Application to packages etc.

Collaboration scheme◼ Developed by the collaboration led by Yamagata University Flexible Electronics JapanGermany International Collaborative Practical Utilization Consortium (YU-FIC)
IonT (Internet on Things - Intelligent OLED-OPV based Signage for interactive
Advertisement) project by YU-FIC
German companies and institutes
Collaboration

Flexible
substrate

Anode
deposition

Printing of
Organic layers

Yamagata
University

Cathodedeposition

Encapsulation

Komori Corporation /Yamagata University

MarketingTakedaPrinting

Developed technologies◼ Flexible OLED prototypes with printing OLED materials

Flexible substrate
Adhesive resin
CathodeOrganic layers(plural layers)

TCO (Transparent Conducting Oxide)
Barrier layer
Flexible substrate
Collaboration

KOMORI Corporation / TAKEDA PRINTING CO., LTD.

Related program⚫ Yamagata University Flexible Electronics Japan-Germany International Collaborative Practical Utilization Consortium (YU-FIC)[Oct. 2017～Mar. 2021].
⚫ MEXT: Construction Program of Open Innovation Organization [FY2018～FY2022].

13

Research Group for Flexible Technologies (Nakada/Furukawa/Yuki/Koden)
Developed
technology

Free Form Electronics (F2E):

Freedom in design by thermo-formed printed electronics
We develop 3D-molding technologies of flexible substrates with electrodes fordeveloping fabrication processes of 3D-circuit board and their applications.
※ F2E (Free Form Electronics - Freedom in design by thermo-formed printed electronics) project in Yamagata University Flexible
Electronics Japan-Germany International Collaborative Practical Utilization Consortium (YU-FIC)

Technological features◼ 3D-molding technologies of flexible substrates with electrodes◼ Process simplification in fabrication of circuit board by printing technologies

Application areas◼ Automotive interiors (lighting, controller, etc. of instrument panels and consoles)◼ Thin IoT devices

Collaboration scheme◼ Developed by the collaboration led by Yamagata University Flexible Electronics JapanGermany International Collaborative Practical Utilization Consortium (YU-FIC)
F2E (Free Form Electronics - Freedom in design by thermo-formed
printed electronics) project by YU-FIC
FUJIKURAKASEIElectrodematerials
Flexible
substrate

Printing ofelectrodes

3D molding

Yamagata
University

Japan SteelWorks

TEIJIN

Developed technologies◼ 3D-shaped prototype with touch screen and LEDs
Flexible substrate Printing electrode

Resin

LED

Injectionof resin

Collaboration

The Japan Steel Works, LTD. / TEIJIN LIMITED / FUJIKURA KASEI CO., LTD.
Related program⚫ Yamagata University Flexible Electronics Japan-Germany International Collaborative Practical Utilization Consortium (YU-FIC)[Oct. 2017～Mar. 2021].
⚫ MEXT: Construction Program of Open Innovation Organization [FY2018～FY2022].

14

Research Group for Flexible Technologies (Nakada/Furukawa/Yuki/Koden)High Temperature Tolerant
Barrier Films for Flexible OLEDs

Developed
technology

OLED fabrication often requires high temperature processes (higher than 200℃).
From this point of view, we develop high temperature tolerant barrier films forflexible OLEDs, using EXPEEK® film developed by KURABO.

Technological features◼ Advantages of high temperature tolerant film EXPEEK(KURABO INDUSTRIES LTD.)・Biaxially stretched PEEK (polyetheretherketone) film
・Similar temperature tolerance to polyimide(Tg：320℃)
・Excellent solvent tolerance
EXPEEK
・Excellent transparency(KURABO INDUSTRIES)・Low thermal shrinkage◼ Application of EXPEEK with gas barrier layer to flexible OLED devices

Developed technologies◼ High gas barrier property:
WVTR with order of 10-5g/m2/day◼ Flexible OLED devices

Barrier film
Adhesive barrier resin
Al (1mm)
Ca (100nm)
SiNx (Sputtering) 100nm
Al2O3 (ALD) 90nm
SiNx (Sputtering) 100nm
EXPEEK (25mm)

EXPEEK (25mm)
Adhesive resin
Al (150nm)
Organic layers

WVTR (g/m2/day)

1.E-02
1.E-03

2.2×10-5g/m2/day

1.E-04(plural layers)

1.E-05

IZO(120nm)
Barrier layer
EXPEEK (25mm)

1.E-06
0

200

400

600

800

1000

Storage time (Hour) at 40℃/90%RH
WVTR (Water Vapor Transmission Rate) measurement
by Ca corrosion method

Collaboration

KURABO INDUSTRIES LTD.

Related program⚫ Yamagata University Flexible Electronics Consortium for Academia-Industry Cooperation (YU-FLEC) [Jan. 2018～Mar. 2023].
⚫ MEXT: Construction Program of Open Innovation Organization [FY2018～FY2022].

Publication⚫ Yamagata University； “JFlex2019” (Jan. 2019 / Tokyo).
⚫ KURABO; “7th Fine Plastic Exhibition” (Dec. 2018 / Tokyo), “SEMICON Japan 2018” (Dec. 2018 / Tokyo).

EXPEEK® is a registered trademark of KURABO INDUSTRIES LTD.

15

Research Group for Flexible Technologies (Nakada/Furukawa/Yuki/Koden)
Developed
technology

Non-ITO Transparent Electrodewith Implanted Metal-mesh Structure

ITO (Indium Tin Oxide), which is the most common transparent electrode in
LCDs and OLEDs, has issues in cost, productivity, etc.
We develop OLED devices using a non-ITO transparent electrode with novel
implanted metal-mesh structure fabricated by Toyo Aluminium.

Technological features◼ Non-ITO transparent electrode with novel
implanted metal-mesh structure fabricatedby Toyo Aluminium K.K.
・High conductivity led by metal-mesh
・Smooth surface due to the implanted
metal-mesh electrode into resin
・Applicable to OLED, OPV, etc.
・Applicable to flexible devices

Thickness：15mm
Metal Width：75mm～

Resin

Substrate (Glass, film, etc.)

Surface resistanceITO (on glass)～10Ω/□ITO (on film)～40Ω/□

Metal-mesh developedby Toyo Aluminium

0.05～1Ω/□
Metal-mesh substrate

Developed technologies◼ OLED devices using non-ITO transparent electrode with implanted metal-meshelectrode fabricated by Toyo Aluminium K.K.
・Comparative performance with normal ITO electrode(Improvements of metal-mesh electrode and interface with organic layer)

CathodeOrganic layers(plural layers)

Transparent
conducting polymer
Metal mesh
Sealant
Resin

1.0E+04
1.0E+03

1.0E+02
1.0E+01
1.0E+00

Glass substrate
Collaboration○（Reference）○ ITO電極
ITO electrode(Reference)△ メタルメッシュ電極
Metal-mesh electrode△

1.0E+05

Luminance (cd/m2)

Encapsulating glass
Desiccant

0

2

4

6

8

Voltage (V)Toyo Aluminium K.K., Prof. Takeshi Sano (INOEL, Yamagata University)

Related program⚫ Yamagata University Flexible Electronics Consortium for Academia-Industry Cooperation (YU-FLEC) [Jan. 2018～Mar. 2023].
⚫ JST: OPERA Program Grant Number JPMOP1844 [FY2018～FY2022].

Publication⚫ Yamagata University； “JFlex2019” (Jan. 2019 / Tokyo).
⚫ Toyo Aluminium; “48th INTERNEPCON Japan” (Jan. 2019 / Tokyo).

16

Research Group for Flexible Technologies (Nakada/Furukawa/Yuki/Koden)
Developed
technology

Optical Simulation

Optical simulation is very useful in device architecture of OLED devices.
We developed optical simulation technologies for practical OLED devices.

Technological features◼ The developed optical simulation technologies of OLED devices can contribute toaccuracy and efficiency, etc. of R&D in conjunction with our rich experiences of actual
OLED devices◼ Software; Fluxim Setfos (Cyber Net Inc. ), etc.

Developed technologies

Radiance (W/m2/sr)◼ Optical simulation of OLED device architecture with a mirror plane and a micro-cavity
layer with faint-reflecting Ag anode・Optical simulation of optimized light emitting profile of OLED devices with one layerof dielectric mirror with high reflective index and a micro-cavity layer with faintreflecting Ag anode・Application of a Nb2O5 layer as high reflective index layer
・The thicknesses of SiO2 and HTL was optimized for obtaining maximum light emitting
Radiance
energy.
Substrate (∞)
Nb2O5 (68nm)
SiO2 (105nm)
IZO_1 (15nm)
Ag (22nm)
IZO_2 (15nm)
HTL (39nm)

Thickness of SiO2 (nm)Radiance

Radiance (W/m2/sr)

EML_R (42nm)
ETL (40nm)
Al (100nm)
Surrounding (∞)
Layer structure

Thickness of SiO2 (nm)Emission spectra (a.u.)

Experimental data of PL of a solution with emission material
OLED light emitting calculated by device simulation
OLED light emitting of actual OLED device
1) Measure PL (photo luminescent) intensity of adilute solution with a low concentration ofemitting material.
2) Estimate optimized device architecture of OLED
devices with a dielectric mirror by using thedevice simulation with obtained PL spectrum.
3) Compare the simulated result with thecharacteristics of actual devices for contributing
accuracy and efficiency, etc. of research.

Wavelength (nm)An example of comparison of an actual device and a simulation of
one layer of dielectric mirror with high reflective index and a microcavity layer with faint-reflecting Ag anode.

17

Research Group for Flexible Technologies (Nakada/Furukawa/Yuki/Koden)

Barrier layer by ALD(Atomic Layer Deposition)

Developed
technology

ALD (Atomic Layer Deposition) can fabricate barrier layers with excellent
surface coverage and can be applied flexible electronics devices.
We provide high gas barrier layers using ALD method for applying various
collaborations on flexible organic electronics.

Technological features◼ Excellent surface coverage by ALD◼ High gas barrier property by multi-layer
structure with SiNx.
WVTR: order of 10-6/g/m2/day(WVTR: Water Vapor Transmission Rate)◼ Equipment：ALD of SUGA CO., Ltd.
(Maximum substrate size: 10cm×10cm)

Developed technologies

ALD equipment (SUGA CO., Ltd.)◼ Multi-layered barrier with Al2O3(ALD) and SiNx (Sputtering) layers
WVTR: order of 10-6/g/m2/day
1.E+00WVTR (g/m2/day)

Glass substrate
Wax
Al (1mm)
Ca (100nm)
SiNx (Sputtering) 200nm
Al2O3 (ALD) Xnm
SiNx (Sputtering) 200nm
PEN film (125mm)

SiN(200nm)/Al2O3(30nm)/SiN(200nm)

1.E-01
1.E-02

SiN(200nm)/Al2O3(60nm)/SiN(200nm)

1.E-03

SiN(200nm)/Al2O3(90nm)/SiN(200nm)

1.E-04

1.E-05
1.E-06
1.E-07
0

200

400

600

800

1000

1200

Storage time (Hour) at 40℃/90%RH

WVTR (Water Vapor Transmission Rate) measurement by Ca corrosion method
SiNx (Sputtering) 200nm
Al2O3 (ALD) 90nm
SiNx (Sputtering) 200nm
Al (100nm)
ETL:Liq[25wt%] (45nm)
Alq3:C545T[1.5%] (120nm)
HTL (120nm)
HATCN (5nm)
ITO (150nm)
Glass substrate

An example of OLED devices with ALD barrier layer
Related program⚫ Yamagata University Flexible Electronics Consortium for Academia-Industry Cooperation (YU-FLEC) [Jan. 2018～Mar. 2023].
⚫ MEXT: Construction Program of Open Innovation Organization [FY2018～FY2022].

18

Research Group for Flexible Technologies (Nakada/Furukawa/Yuki/Koden)

TFE (Thin Film Encapsulation)
Technologies for OLEDs

Developed
technology

We develop TFE (Thin Film Encapsulation) technologies for OLED devices, usingorganic resins developed by TOYO INK SC HOLDINGS.

Technological features◼ Advantages of “Non-solvent UV-IJ resin ink”
developed by TOYO INK SC HOLDINGS”
・To support SiNx barrier layer
・UV cure type (non-solvent)・Applicable to ink-jet

Inorganic barrier layer (SiNx)
Organic resin (Toyo Ink)
Inorganic barrier layer (SiNx)
CathodeTFE (Thin Film
Encapsulation)

Organic layers(plural layers)
Insulator

Barrier layer

Flexible PI substrate
Anode

Developed technologies

TFT-circuit/bass-line

Insulator

Image of OLED with TFE◼ TFE structure with high gas barrier property
・TEF with “Non-solvent UV-IJ resin ink”
developed by TOYO INK SC HOLDINGS・ No actual damage after storage test of 1,000
hours under 40℃/90%RH
・WVTR (Water Vapor Transmission Rate):order of 10-6g/m2/day (40℃/90%RH)◼ OLED device with thedeveloped TFE structure

Ca corrosion test
(40℃/90%RH)
1,030HWVTR (g/m2/day)

1.E-01
1.E-02
Organic resin: reference

1.E-03

1,030H

1.E-04
1.E-05
1.E-06

Organic resin: developed

1.E-070

Collaboration

200

400 600 800 1000 1200
Storage time (hour)

TOYO INK SC HOLDINGS CO., LTD.

Related program⚫ Yamagata University Flexible Electronics Consortium for Academia-Industry Cooperation (YU-FLEC) [Jan. 2018～Mar. 2023].
⚫ MEXT: Construction Program of Open Innovation Organization [FY2018～FY2022].

Publication⚫ Yamagata University； “JFlex2019” (Jan. 2019 / Tokyo).

19

Research Group for Flexible Technologies (Nakada/Furukawa/Yuki/Koden)
Developed
technology

PSA Encapsulating Technologies
for OLEDs

We collaborate with MORESCO Corporation, aiming at the development of flexible OLED
devices with their PSA (Pressure Sensitive Adhesive) film.

Technological features＜Unique features of PSA film of MORESCO＞■ Hot-melt type■ Simple encapsulation process
Flexible substrate
Barrier layer■ Excellent flexibility
PSA material■ Excellent adhesion (barrier layer)
OLED layer■ High gas barrier
Barrier layer■ Solvent freeFlexible substrate

Pressure

Developed technologies■ Flexible OLED devices with PSA encapsulation
Flexible substrate
Barrier layer
PSA barrier resin
Al2O3 (60nm) by ALD
CathodeOrganic layers(plural layers)
ITO
Barrier layer
Flexible substrate

Collaboration

MORESCO Corporation

Related program⚫ Yamagata University Flexible Electronics Consortium for Academia-Industry Cooperation (YU-FLEC) [Jan. 2018～Mar. 2023].
⚫ JST: OPERA Program Grant Number JPMOP1614 [FY2016～FY2020].
⚫ MEXT: Construction Program of Open Innovation Organization [FY2018～FY2022].

20

Research Group for Flexible Technologies (Nakada/Furukawa/Yuki/Koden)
Developed
technology

Printed Flexible Organic Photovoltaic (OPV)
fabricated by Roll-to-roll Processes

By the collaboration with MORESCO Corporation and ideal star inc., we developed a roll-toroll (R2R) process technology for printing-type flexible Organic Photovoltaics (OPVs), which
are being developed by MORESCO Corporation and ideal star inc., and started a verification
test of the technology.
The printed flexible OPV is expected to be inexpensive compared with silicon-based current
PV and to produce clean energy because of the drastic reduction of greenhouse gas generated
during production to discard.

Features of flexible OPV◼can be applied to windows etc. due to the transparent feature.
◼thin, light weight and un-breakable due to flexible and film
◼applied to various places such as windows, walls, etc. by double-sided tape etc.

Technological features◼Fabricated by roll-to-roll (R2R) printing◼Width:30cm、Length>1m◼Fabrication processes
1) Transparent electrode(TCO)
deposition
2) TCO patterning3) Cleaning of substrate
4) Printing of ETL
5) Printing of active layer
6) Printing of HTL7) Printing of electrode8) Current collection9) Encapsulation

Structure of flexible OPV

Developed technologies◼ Roll-to-roll (R2R) printing
technologies of flexible OPV◼ Verification test:
1) Laminate flexible OPVs on windowsof 2nd flour2) Measure and transmit the data of voltage,current, temperature and sunshine byusing the generated power.
3) Display the measured data on a monitor
of 1st flour.
Collaboration

Verification test at INOEL of Yamagata University

MORESCO Corporation / ideal star inc.

Related program⚫ JST: OPERA Program Grant Number JPMOP1614 [FY2016～FY2020].
⚫ MEXT: Construction Program of Open Innovation Organization [FY2018～FY2022].

Publication⚫ Yamagata University； Press Release 2019.11.6.
⚫ MORESCO； Press Release 2019.11.6.

21

Research Group for Flexible Technologies (Nakada/Furukawa/Yuki/Koden)
Developed
technology

Inorganic Barrier Layers for OLEDs

We develop flexible OLEDs with inorganic CVD barrier layer in the collaboration
with i3-opera (Director: Prof. C. Adachi) operated by the Fukuoka Industry,
Science and Technology Foundation (Fukuoka IST).

Collaboration scheme
3i -opera

Collaboration

Research Group for
Flexible Technologies
Yamagata University

・ CVD deposition of barrier layer
・ Fabrication of electrodes
・ Deposition of organic layers for OLEDs・ Flexible substrate
・ Evaluation of barrier ability
・ ALD deposition of barrier layer
・ Flexible encapsulation

Developed technologies

40℃/90%RH◼ High gas barrier property with single
SiNx layer (thickness: 200nm)
deposited by CVD at low temperature(60℃).
WVTR=2.4×10-5g/m2/day(WVTR: Water Vapor Transmission Rate)※Measured by “Super Detect” of MORESCO
utilizing the MA method (Modified differential
pressure method with an Attached support)◼ Flexible OLED devices
Flexible film

SiNx (200nm) by CVD (i3-opera)
CathodeOrganic layers(plural layers)
Transparent electrode
SiNx (200nm) by CVD (i3-opera)

SiNx (200nm) by CVD (i3-opera)
Al2O3 by ALD (INOEL)
or Barrier resin (TOYO INK)
SiNx (200nm) by CVD (i3-opera)
CathodeOrganic layers(plural layers)
Transparent electrode
SiNx (200nm) by CVD (i3-opera)

Flexible film (PEN)

Flexible film (PEN)

Barrier layer
Barrier resin

Collaboration

MORESCOi3-opera
MORESCO Corporation, TOYO INK SC HOLDINGS CO., LTD.

Publication⚫ i3-opera；”nano tech 2019” （Jan. 2019 / Tokyo）.

22

Research Group for Flexible Technologies (Nakada/Furukawa/Yuki/Koden)

Topics / Publications
Award➢H. Nakada, M. Koden, “Award from Minister of State for Science andTechnology Policy”, Cabinet Office, Government of Japan, (2017).

Book➢M. Koden, “OLED Displays and Lighting” (Wiley, IEEE Press) (2017).

Paper➢ T. Furukawa, M. Koden, IEICE Trans. Electron, E100-C, 949-954 (2017).
“Novel roll-to-roll deposition and patterning of ITO on ultra-thin glass for flexible OLEDs”

International Conference➢ T. Nakagaki, T. Kawabata, H. Takimoto, T. Furukawa, IDW’19, FLXp1-9L (2019).
“Scribing Tool and Cutting Method for Ultra-thin Glass”➢ K. Taira, Taiga Suzuki, W. Konno, H Chiba, H. Itoh, M. Koden, T. Takahashi, T. Furukawa, IDW’18, FLX2-4L(2018). “Development of High Gas Barrier Film Using Novel Precursor by Roll to Roll PECVD”➢ T. Furukawa, Advanced Materials-2018（WCAM2018） (2018). [Invited]“Substrates for Organic Electronics - Ultra-thin Glass, Stainless Steel Foil and High Gas Barrier Plastic Film”➢ M. Koden, T. Furukawa, T. Yuki, H. Nakada, LS16 (2018). [Invited]“Roll-to-roll and printing technologies for electrodes of flexible OLED lighting”➢ T. Furukawa, N. Kawamura, T. Noda, Y. Hasegawa, D. Kobayashi, M. Koden, IDW’17, FLX6-2 (2017).
“Novel Roll-to-Roll Fabrication Processes of Transparent Electrodes on Ultra-Thin Glass”➢ T. Furukawa, N. Kawamura, M. Koden, H. Itoh, H. Kuroiwa, K. Nagai, LOPEC (2017).
“Gas barrier film for OLED devices”➢ M. Koden, T. Furukawa, T. Yuki, H. Kobayashi, H. Nakada, IDW/AD’16, FLX3-1 (2016). [Invited]“Substrates and Non-ITO Electrodes for Flexible OLEDs”➢ T. Furukawa, IWFPE2016 (2016). [Invited]“Flexible Substrates and Printed Transparent Electrode for OLED Lighting”➢ T. Furukawa, N. Kawamura, H. Nakada, M. Koden, The International Conference on Flexible and Printed
Electronics (ICFPE 2016), O15-6 (2016). ”Novel ITO fabrication processes on ultra-thin glass”

Exhibitions➢ “LOPEC” (March 2019, Germany).
➢ “JFlex2019” (January 2019).
➢ “LOPEC” (March 2018, Germany).
➢ “Printable Electronics 2018” (February 2018).
➢ “LED & OLED EXPO 2017” (Korea) (June 2017).
➢ “Printable electronics 2017” (February 2017).
➢ “G7 Exhibition” (May 2016).
➢ “Printable electronics 2016” (January 2016).
Printable Electronics➢ “International Photonics Exhibition 2015” (Korea)（October 2015).
2017 Award➢ “National Museum of Nature and Science (Japan)” (May 2015).

JFlex 2019 Award“LOPEC”(2019, Germany)“International Photonics Exhibition
2015” (October 2015, Korea)“JFlex 2019”(2019, Tokyo)

23“Flex Japan 2019”(2019, Tokyo)

Research Group for Flexible Technologies (Nakada/Furukawa/Yuki/Koden)

Main Members
Professor, Deputy Director

Professor

Hitoshi Nakada

Dr. Mitsuhiro Koden

nakada@yz.yamagata-u.ac.jp
Field: Organic electronics devices

koden@yz.yamagata-u.ac.jp
Field: LCD, OLED, Chemistry

1981
Graduated at Tohoku University
1981～2013 Pioneer Corporation
1988～
R&D of OLED display and OLED lighting
2013～
INOEL, Yamagata University (current position)

1983
Graduated at Osaka University (PhD)
1983～2012 Sharp Corporation(Liquid crystal materials, LCD, OLED display, etc.)
1998～2011 Guest prof. of Nara Institute of Science and Technology
2012～
INOEL, Yamagata University (current position)(Award)・Award from Minister of State for Science and Technology Policy”, Cabinet
Office, Government of Japan (2017).
・Optoelectronics Industry and Technology Development Association,
19th Kenjiro-Sakurai Memorial Award (2003).
・47th Okochi Memorial Award (2000).
(Development)
・World’s first OLED product (passive-matrix OLED display) (1997).
・World’s first phosphorescent OLED product (2003).
・Passive-matrix full-color flexible OLED display prototype (2003).

(Award)・Award from Minister of State for Science and Technology Policy”, Cabinet
Office, Government of Japan (2017).
・Award from The Japanese Liquid Crystal Society (2005).
(Development)
・17” Ferroelectric liquid crystal display (FLCD) prototype (1999).
・3.6” Polymer OLED display with world’s highest resolution (2006).
(Book)
・M. Koden, “OLED Displays and Lighting” (Wiley; IEEE Press) (2017).
・K. Takatoh, M. Hasegawa, M. Koden, N. Itoh, R. Hasegawa, M. Sakamoto,“Alignment Technologies and Applications of Liquid Crystal Devices” Taylor& Francis (2005).

Associate Professor

Associate Professor

Tadahiro Furukawa

Dr. Toshinao Yuki

ta-furukawa@yz.yamagata-u.ac.jp
Field: Fine patterning technology, Printing,Roll-to-roll technology

t-yuki@yz.yamagata-u.ac.jp
Field: OLED (Display, Lighting, Device)
Polymer materials

1984
Graduated at Saitama University (Master degree)
1984～2011 Kyoto Printing Co., Ltd.
R&D and production of Color filter (CF)R&D of flexible CF and LCD
2011～
INOEL, Yamagata University (current position)

1993～1996 Teijin Limited
1996～1999 Graduated at Yamagata University (PhD)
1999～2015 Tohoku Pioneer Corporation(PMOLED, AMOLED, Tiling OLED, OLED lighting, etc.)
2015～
INOEL, Yamagata University (current position)(Papers)
・T. Furukawa, M. Koden, IEICE Trans. Electron, E100-C, 949-954 (2017).
(International conference)
・T. Furukawa, M. Koden, ICDT2019 (2019).
・T. Furukawa, WCAM2018 (2018）. [China, Invited]
・T. Furukawa, et al., IDW’17, FLX6-2 (2017).
・T. Furukawa, LED & OLED EXPO 2017 (2017). [Korea]
・T. Furukawa, et al., LOPEC (2017). [Germany]
・T. Furukawa, et al., IDW/AD’16, FLX3-3 (2016).
・T. Furukawa, IWFPE2016 (2016). [Korea, Invited]
・T. Furukawa, et al., ICFPE 2016, O15-6 (2016).

(Award)・The 4th Japan OLED Forum Outstanding Achievement Awards (2011).
(Development)
・World’s first phosphorescent OLED product (2003).
・World’s first large size tiling OLED display product (2010).
・World’s first color-tunable OLED lighting product (2013).

Project Scientist
Miho Sugimoto

Project Scientist
Norifumi Kawamura

Project Scientist
Masanori Abe

m-sugimoto@yz.yamagata-u.ac.jp

n-kawamura@yz.yamagata-u.ac.jp

m-abe@yz.yamagata-u.ac.jp

1999 Graduated at Keio University (Master deg.)
1999～2004 Murata Manufacturing Co., Ltd.
2005～2019 Tohoku Pioneer Corporation
2019～ INOEL, Yamagata University (current position)(Skills)
Film OLED, Encapsulation, Electrode,
Equipment, etc.

2001 Graduated at Yamagata University (Master deg.)
2001～2007 IMES Co., LTD
2007～2013 ROHM Co., Ltd. / Lumiotec Inc.
2013～ INOEL, Yamagata University (current position)(Skills)
OLEDs (Device, process, Evaluation)

1990～2013 Tohoku Pioneer Corporation2013～ INOEL, Yamagata University (current position)（Skills）
Printing (Screen printing, etc.), Roll-to-roll (R2R),
OLEDs, Encapsulation, Equipment, etc.

January 2020
Research Group for Flexible Technologies (Nakada/Furukawa/Yuki/Koden Group)
Innovation Center for Organic Electronics (INOEL)
Yamagata University
1-808-48 Arcadia, Yonezawa, Yamagata 992-0119, Japan
TEL +81-238-29-0575
E-mail： nakada@yz.yamagata-u.ac.jp
E-mail： koden@yz.yamagata-u.ac.jp
URL：https://inoel.yz.yamagata-u.ac.jp/F-consortium/home-e.html

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