cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Method and Device for Electrically Contacting Si-Cells  as a Basis for Classification Measurement Combined with Save Material Handling
Creators: name: Kiesewetter, J.
name: Reischl, A.
name: Teich, M.
name: Becker, A.
name: Dietrich, C.
Publisher: name: WIP-Munich
Year: 2010
Subjects: Wafer-Based Silicon Solar Cells and Materials Technology
Manufacturing Issues and Processing

description: 25th European Photovoltaic Solar Energy Conference and Exhibition / 5th World Conference on Photovoltaic Energy Conversion, 6-10 September 2010, Valencia, Spain; 1691-1696
description: Si-wafer based PV modules consist of many single solar cells. The best match of these cells within the
module guarantees the maximum output, because the worst cell is essential for the overall behaviour of the module.
Exact and repeatable classification of the solar cells is the basis for the availability of the maximum power that has been
produced until the cells reach the roof. While being tested, the cells reach their maximum value in the cell production
chain. Therefore, the biggest waste of value is cell loss caused by damage in this step. The purpose of the work is to
improve the critical final test process of the cell and possibly other electrical test steps during cell production.
Very precise and permanently improved contacting technologies have been available in semiconductor manufacturing for
years. The approach of this work was to transfer contact technologies out of semiconductor testing into the Si-cell
testing. This paper presents an approach to provide electrical test conditions characterized by reproducing real
application conditions and current distribution along the busbar on a cell with constant contact resistance over a long
period of time in the production process, with a long life time of the contacts used in cell test and by minimal contact
forces during cell test.
On the Steps' Optimization of a Pseudo-Equatorially Tracked PV Panel
Creators: name: Diaconescu, D.
name: Visa, I.
name: Burduhos, B.
name: Saulescu, R.
Publisher: name: WIP-Munich
Year: 2008
Subjects: Components for PV Systems
Engineering and System Integration

description: 23rd European Photovoltaic Solar Energy Conference and Exhibition, 1-5 September 2008, Valencia, Spain; 3160-3164
description: In order to maximize the solar direct radiation which falls perpendicularly on the PV panel mounted on a pseudo-equatorial stand-alone tracking system and to minimize the energetic consumption and the load of the tracking actuators, the paper proposes and establishes an optimal orientation program for the control system of the stand-alone tracker.
Understanding Metallic and Ionic Contamination in Photovoltaic Wet Chemistries from Chemical Delivery Systems
Creators: name: Johnson, M.W.
name: Gildor, A.
Publisher: name: WIP-Munich
Year: 2010
Subjects: Wafer-Based Silicon Solar Cells and Materials Technology
Manufacturing Issues and Processing

description: 25th European Photovoltaic Solar Energy Conference and Exhibition / 5th World Conference on Photovoltaic Energy Conversion, 6-10 September 2010, Valencia, Spain; 1706-1709
description: As photovoltaic cell manufacturers strive to improve yield and cell efficiency it is increasingly important to carefully select
the materials of construction used in chemical delivery systems. Low purity materials of construction are prone not only to
chemical degradation but they also contribute metallic and ionic contaminates into critical high purity process chemistries.
This metallic and ionic contamination study analyzed several materials commonly used as wetted surfaces in photovoltaic
chemical delivery systems. Contaminants leached from each material were monitored as a function of time and temperature.
Results clearly demonstrate the wide range of contamination contribution into process chemistries from the different
materials.
The data can be used by engineers to reduce the introduction of metallic and ionic contaminants into their critical process
chemistries by carefully selecting the materials of construction used in their chemical delivery system.
Performance Measurements and Monitoring of Shadow Effects on PV Systems
Creators: name: Del Buono, M.
name: Armani, M.
name: Pötz, B.
name: Cattani, D.
name: Sparber, W.
Publisher: name: WIP-Munich
Year: 2008
Subjects: Components for PV Systems
Engineering and System Integration

description: 23rd European Photovoltaic Solar Energy Conference and Exhibition, 1-5 September 2008, Valencia, Spain; 3170-3173
description: This paper will present measurement results of small shadows on photovoltaic modules by different technology, using a test field installed on a roof. The three photovoltaic systems, which compose the test field, have the same peak power of 1 kWp and identical horizontal inclination and sun orientation, but are based on different technologies. In fact one is based on polycrystalline silicon modules, one is based on CdTe modules and one is based on hetero-junction with intrinsic thin layer solar modules. The measurement’s principle is to cast artificial shadow on the solar system during its functioning, in order to simulate the influence of shading objects. By same solar irradiation and shade area on solar system the measurement data will includes array voltage, array current and AC delivered power and will be repeated for each small system by different area. In addition to the results from this test center, some monitoring data from a commercial PV plant will be used. The roof, where the plant was installed, presents some problems caused by shading elements near the solar system. The purpose of this
project is to allow a better understanding of small shadow effects on the performance ratio of PV systems. The obtained results will be a valuable aid to the PV installer of photovoltaic systems to understand the real effect of shadowing element on existing plants, which do not have optimal sun exposure conditions and to predict the consequence of shading on the
electrical production by solar systems in planning.
Growth and Characterization of n-Type Multicrystalline Silicon Ingot Intentionally Compensated with Aluminum
Creators: name: Goh, L.W.
name: Dhamrin, M.
name: Ban, N.
name: Saegusa, K.
name: Tabuchi, H.
name: Megumi, T.
name: Kamisako, K.
Publisher: name: WIP-Munich
Year: 2009
Subjects: Wafer-based Silicon Solar Cells and Materials Technology
Mono- and Multicrystalline Silicon Materials and Cells

description: 24th European Photovoltaic Solar Energy Conference, 21-25 September 2009, Hamburg, Germany; 2254-2257
description: Recently, n-type mc-Si has been proven to have a higher tolerance to common transition metal
impurities, such as iron. In addition, solar cells made of n-type substrates have a superior property as compared to
those made of p-type substrates. In this work, n-type mc-Si ingot co-doped with aluminum was grown to investigate
the phosphorus and aluminum compensation effects and aluminum behavior in the mc-Si ingot. High diffusion
lengths were realized at the middle-bottom region due to the less impurity contamination and relatively high
resistivity of the ingot. However, the heavily accumulation of metal impurities and lower resistivity at the top of the
ingot resulted in poor diffusion lengths. Improvement of carrier lifetimes were realized after P-gettering performed at
875oC for 30 min in N2 + O2 ambient across the whole parts of the ingot, especially at the middle of the ingot that
reaching 50μs.
Analysis of the Junction Properties of CdS/CdTe Devices in Substrate and Superstrate Configurations
Creators: name: Dhere, R.G.
name: Duenow, J.N.
name: DeHart, C.M.
name: Li, J.V.
name: Kuciauskas, D.
name: Young, M.R.
name: Alberi, K.
name: Mascarenhas, A.
name: Gessert, T.A.
Publisher: name: WIP
Year: 2011
Subjects: Thin Film Solar Cells
CdTe Solar Cells

description: 26th European Photovoltaic Solar Energy Conference and Exhibition; 2456-2459
description: The best efficiency of CdS/CdTe devices fabricated in the substrate configuration reported to date is
about 8%, which is about half the 17.3% reported for the conventional superstrate configuration. The performance of
substrate devices is affected by lower open-circuit voltage (Voc), about 700 mV, and low fill factor (FF), which
indicates that these devices are primarily limited by non-ideal junction properties and possibly by the ohmic contact
to CdTe. In our study of the junction properties of superstrate devices, we show that lower-Voc devices (< 720 mV)
with SnO2/CdTe and CdS/CdTe structures are true heterojunction devices. High charged defect density at the heterointerfaces
is present in the depletion region and contributes to the dark current density, thereby reducing Voc. On the
other hand, for higher-performance devices with Voc > 800 mV, the junction is between an n-type, Te-rich CdSTe
alloy with a bandgap of 1.45 eV and p-type CdTe with a bandgap of 1.5 eV. Because the crystal structure of both the
Te-rich alloy and the CdTe is cubic zinc blende, and the lattice mismatch between the two is minimal, the device in
this case can be considered a quasi-homojunction. These higher-Voc devices are therefore affected less by the high
charged defect density at the hetero-interface, which lies outside of the depletion region. We present analysis of the
junction properties of our recent and improved substrate-configuration devices with Voc well in excess of 800 mV, FF
approaching 60%, and efficiencies around 10%. We also compare devices fabricated in both the substrate and
superstrate configurations and with comparable Voc in the range of 700 to more than 800 mV. Photoluminescence
(PL) and temperature-dependent PL, current density-voltage and quantum efficiency analysis, and modulated
reflectance measurements are used to study device properties.
Measured Increased Jsc in Production Quality CdTe Cells and Mini-Modules through Luminescent Down-Shifting
Creators: name: Ross, D.
name: Klampaftis, E.
name: Fritsche, J.
name: Bauer, M.
name: Richards, B.S.
Publisher: name: WIP
Year: 2011
Subjects: Thin Film Solar Cells
CdTe Solar Cells

description: 26th European Photovoltaic Solar Energy Conference and Exhibition; 2463-2466
description: Luminescent down shifting (LDS) utilising ethylene vinyl acetate (EVA) as a host material and
Lumogen V570 and Y083 dyes has been demonstrated to increase the short-circuit current density (JSC) of CdTe
mini-modules (8 cells, 72 cm2 active area). These were cut from production line modules produced by Calyxo
GmbH in late 2009. Mini-modules were measured and then laminated with clear EVA, V570-doped EVA or
Y083-doped EVA and a fluorinated ethylene propylene (FEP) cover layer. The devices were re-measured after
lamination and all showed improved JSC. The best result was achieved with Y083-doped EVA giving an increase
of 8% in JSC.
Lead-Free Front Silver Paste for High Quality Contacts to Silicon Solar Cells: Glass Frit and Firing Optimization
Creators: name: Ebong, A.
name: Rohatgi, A.
name: Prunchak, R.
name: Gao, X.
name: Kleine Jäger, F.
name: Hermes, S.
Publisher: name: WIP-Munich
Year: 2009
Subjects: Wafer-based Silicon Solar Cells and Materials Technology
Mono- and Multicrystalline Silicon Materials and Cells

description: 24th European Photovoltaic Solar Energy Conference, 21-25 September 2009, Hamburg, Germany; 2242-2245
description: The use of lead-free screen-printed pastes to contact commercial crystalline solar cells will make solar
electricity truly green and benign to the environment. In this paper we report on the investigation of lead-free front silver
pastes for solar cells through a combination of glass frit chemistry, powder particle size and emitter profiles in conjunction
with rapid thermal firing. The glass frit content in the paste was used as a parameter to control the chemistry of the paste that
can fire through silicon nitride and form high quality contact without compromising the junction quality. Based on the glass
frit content and the powder particle size the firing temperature was optimized to achieve fill factor of 0.775 on textured mono
and 0.774 multi-crystalline solar cells. Efficiency of 17.5% was achieved on Cz textured mono crystalline cells and 15.3%
on multicrystalline. Continued work in this area is expected to achieve even higher efficiencies with high sheet resistance
emitters.
Intermediate Band PV Materials: Proposal of New Systems and Experimental Realizations
Creators: name: Wahnón, P.
name: Palacios, P.
name: Aguilera, I.
name: Seminovski, Y.S.
name: Sánchez, K.
name: Conesa, J.C.
name: Lucena, R.
Publisher: name: WIP
Year: 2011
Subjects: Advanced Photovoltaics : New Concepts and Ultra-High Efficiency
New Materials, Cells and Modules

description: 26th European Photovoltaic Solar Energy Conference and Exhibition; 44-47
description: The intermediate band (IB) solar cell, based on the absorption of two low energy photons to promote
one electron across the full bandgap, has been proposed to increase PV efficiency by a factor above 1.5. Using DFT
calculations we show here that silicon materials with certain elements inserted and which have been experimentally
prepared and reported in the literature, develop an IB electronic structure able to implement an IB solar cell. In
particular, this happens for Ti atoms introduced via ion implantation and occupying interstitial sites, and for S or Se
atoms inserted in lattice sites by similar methods. In addition, we present new experimental data for another IB
material previously proposed and synthesized by us, viz. vanadium-substituted In2S3: using a photocatalytic method,
in which photogenerated electrons and holes are transferred to molecules at the surface of this material (made in
powder form and suspended in an aqueous solution) producing thus chemical reactions, we show that insertion of V
in In2S3 allows to generate electrons and holes, which can be extracted at the material surface, also with photons
having energy lower than the In2S3 bandgap width. This material could thus be used to build an IB thin film PV cell.
Large Scale Rear Side Metallization of c-Si Solar Cells by High Rate Evaporating of Aluminum
Creators: name: Schramm, S.
name: Deppisch, T.
name: Englert, M.
name: Liu, J.
name: Dieter, T.
name: Nekarda, J.-F.
name: Trassl, R.
Publisher: name: WIP-Munich
Year: 2010
Subjects: Wafer-Based Silicon Solar Cells and Materials Technology
Manufacturing Issues and Processing

description: 25th European Photovoltaic Solar Energy Conference and Exhibition / 5th World Conference on Photovoltaic Energy Conversion, 6-10 September 2010, Valencia, Spain; 1702-1705
description: Aluminum evaporation is a well known process in the Large Area coating industry. Based on this
technique we developed an evaporation source for wafer coating. With a power consumption of ~70kW and a material
usage of 1-2kg/h, the temperature load and remaining coating material must be handled carefully to achieve a constant
long term production. Main difference to web coaters are the coating speed (m/min compared to m/sec), layer thickness
(μm to nm), substrate handling (inflexible wafer, flexible plastic foils) and production times (day(s) compared to hours).
The results of a laboratory scale Al-source with a coating width of 500mm have been published before [1]. Cells for LFC
have been produced with efficiencies of >20%. In this paper we present our new coating source with a coating width of
1600mm appropriate for more than 3000 wafers/h in a production environment.
Investigation of a Suitable Back Contact for CdTe/CdS Solar Cells Prepared in the Substrate Configuration
Creators: name: Romeo, N.
name: Bosio, A.
name: Mazzamuto, S.
name: Menossi, D.
name: Peña, J.L.
name: Salavei, A.
name: Rimmaudo, I.
name: Allodi, V.
name: Romeo, A.
Publisher: name: WIP
Year: 2011
Subjects: Thin Film Solar Cells
CdTe Solar Cells

description: 26th European Photovoltaic Solar Energy Conference and Exhibition; 2460-2462
description: Several attempts in order to prepare a suitable back contact to be used for CdTe/CdS solar cells in the
substrate configuration have been made. Excluding the use of metallic elements which can diffuse to the junction, we
found a specific configuration as a possible candidate for a stable and not rectifying contact.
This configuration consists in the deposition by sputtering of a stack of layers namely 0.5μm of Mo followed by
10nm of Cu, 10nm of Ag and 1μm of ZnTe. This type of contact gives the possibility to prepare CdTe/CdS solar cells
in the substrate configuration with an efficiency around 7%. By changing the parameters of preparation of the solar
cells, we believe, the efficiency can be increased up to 10% or more.
Tracked PV Platform System for Outdoor Testing
Creators: name: Comsit, M.
name: Visa, I.
name: Duta, A.
Publisher: name: WIP-Munich
Year: 2008
Subjects: Components for PV Systems
Engineering and System Integration

description: 23rd European Photovoltaic Solar Energy Conference and Exhibition, 1-5 September 2008, Valencia, Spain; 3174-3179
description: The implementation of the PV panels in the built environment represents nowadays an important issue in the development of solar energy conversion systems. Optimizing the energy efficiency of the conversion systems can be done by using performant materials or by increasing the degree of use of the solar radiation. In order to maximize the quantity of radiation incident to the panel, the tracking systems are used. The paper presents a field-operating tracked platform, as research tool in developing a testing protocol regarding the performances and efficiency increase of the different types of PV modules. Based on data acquisition of the solar radiation and PV output, sets of implementation recommendations of different type of PV panels in respect with the climatic profile of the specific area are developed. The testing results are achieved by using an infrastructure implemented in the Centre Product Design for Sustainable Energy from Transilvania University of Brasov. The infrastructure consists in a PV platform dual axis tracked system, stationary reference PV panels, storage system and data acquisition system. Based on a Bilateral Agreement the same infrastructure will be implemented in the University of the Applied Science Zwickau, Germany. This strategy is developed under a concept called PV Twin Laboratory.
InnoPOL: an EMCCD imaging polarimeter and 85-element curvature AO system on the 3.6-m AEOS telescope for cost effective polarimetric speckle suppression
Creators: name: Harrington, David
name: Berdyugina, Svetlana
name: Chun, Mark
name: Ftaclas, Christ
name: Gisler, Daniel
name: Kuhn, Jeff
Publisher: name: arXiv
Year: 2016
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: The Hokupa'a-85 curvature adaptive optics system components have been adapted to create a new AO-corrected coudé instrument at the 3.67m Advanced Electro-Optical System (AEOS) telescope. This new AO-corrected optical path is designed to deliver an f/40 diffraction-limited focus at wavelengths longer than 800nm. A new EMCCD-based dual-beam imaging polarimeter called InnoPOL has been designed and is presently being installed behind this corrected f/40 beam. The InnoPOL system is a flexible platform for optimizing polarimetric performance using commercial solutions and for testing modulation strategies. The system is designed as a technology test and demonstration platform as the coudé path is built using off-the-shelf components wherever possible. Models of the polarimetric performance after AO correction show that polarization modulation at rates as slow as 200Hz can cause speckle correlations in brightness and focal plane location sufficient enough to change the speckle suppression behavior of the modulators. These models are also verified by initial EMCCD scoring camera data at AEOS. Substantial instrument trades and development efforts are explored between instrument performance parameters and various polarimetric noise sources.
description: Copyright 2015 Society of Photo-Optical Instrumentation Engineers. One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited. DOI http://dx.doi.org/10.1117/12.2056667
Atomic Layer Deposition of ZnInxSy Buffer Layers For Copper Indium Gallium Diselenide Thin Film Solar Cells
Creators: name: Genevée, P.
name: Donsanti, F.
name: Renou, G.
name: Lincot, D.
Publisher: name: WIP
Year: 2011
Subjects: Thin Film Solar Cells
CIS and Related Ternary and Quaternary Thin Film Solar Cells

description: 26th European Photovoltaic Solar Energy Conference and Exhibition; 2428-2431
description: We report in this paper the study of ZnInXSY films deposited by atomic layer deposition at 200 °C
for buffer layers in CIGS solar cells. The growth was monitored at the atomic layer level by in situ quartz crystal
microbalance technique. Buffer layers with different In/(In+Zn) ratios over the whole composition range were
prepared and characterized. Cell results show that an intermediate composition allows to find a compromise
between the properties of In2S3 and ZnS as aimed for this study. Best efficiencies were obtained with indium rich
buffer layers but with limited Voc and light losses due to absorption in the short wavelengths. At the opposite,
zinc rich buffer layers are more transparent and may allow higher Voc and Jsc but increase interface
recombination. In particular, the layer with In/(In+Zn) = 28 % led to a Voc 30 mV higher than using a reference
CdS buffer layer and an equivalent Jsc but a decreased fill factor.
Towards a comprehensive picture of powerful quasars, their host galaxies and quasar winds at z ~ 0.5
Creators: name: Wylezalek, Dominika
name: Zakamska, Nadia L.
name: Liu, Guilin
name: Obied, Georges
Publisher: name: arXiv
Year: 2016
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Luminous type-2 quasars in which the glow from the central black hole is obscured by dust are ideal targets for studying their host galaxies and the quasars' effect on galaxy evolution. Such feedback appears ubiquitous in luminous obscured quasars where high velocity ionized nebulae have been found. We present rest-frame yellow-band (~5000 Angstroms) observations using the Hubble Space Telescope for a sample of 20 luminous quasar host galaxies at 0.2 < z < 0.6 selected from the Sloan Digital Sky Survey. For the first time, we combine host galaxy observations with geometric measurements of quasar illumination using blue-band HST observations and [OIII] integral field unit observations probing the quasar winds. The HST images reveal bright merger signatures in about half the galaxies; a significantly higher fraction than in comparison inactive ellipticals. We show that the host galaxies are primarily bulge-dominated, with masses close to M*, but belong to < 30% of elliptical galaxies that are highly star-forming at z ~ 0.5. Ionized gas signatures are uncorrelated with faint stellar disks (if present), confirming that the ionized gas is not concentrated in a disk. Scattering cones and [OIII] ionized gas velocity field are aligned with the forward scattering cones being co-spatial with the blue-shifted side of the velocity field, suggesting the high velocity gas is indeed photo-ionized by the quasar. Based on the host galaxies' high star-formation rates and bright merger signatures, we suggest that this low-redshift outbreak of luminous quasar activity is triggered by recent minor mergers. Combining these novel observations, we present new quasar unification tests, which are in agreement with expectations of the orientation-based unification model for quasars.
description: 16 pages + 3 pages Appendix and references, accepted to MNRAS
Epitaxial Growth of Crystalline Silicon on N42 Alloys by PECVD at 175 °C for Low Cost and High Efficiency Solar Cells
Creators: name: Torres Rios, A.
name: Djeridane, Y.
name: Reydet, P.L.
name: Reyal, J.P.
name: Roca I Cabarrocas, P.
Publisher: name: WIP
Year: 2011
Subjects: Thin Film Solar Cells
Thin Film Crystalline Silicon Solar Cells

description: 26th European Photovoltaic Solar Energy Conference and Exhibition; 2435-2438
description: We have developed solar cells on N42 substrates using silicon deposited by PECVD at 175°C with
thickness between 1-2μm. The N42 substrate is a high stacking fault energy fcc alloy which develops during
recrystallization a sharp cube texture {100}(001). This structure of the substrate has coincidence site lattice with
silicon, with a misfit of 6.4%. A mixture of SiF4, Ar and H2 gases was used to produce the intrinsic layer of the single
junction solar cell at low temperature (175°C) in a standard rf-PECVD system. We also demonstrated that a dry
plasma treatment of the substrate’s surface improves the contact between the N42 and the p-type μc-Si:H layer, thus
reducing the series resistance of the cell. A polycrystalline silicon solar cell with an efficiency of 5.8% has been
achieved on N42 substrates. Moreover, detailed electro-optical modeling shows that is possible to obtain 10% of
efficiency from a single junction solar cell modeled in the program ASDMP.
Vaisman nilmanifolds
Creators: name: Bazzoni, Giovanni
Publisher: name: arXiv
Year: 2016
Subjects: subject: Differential Geometry (math.DG)
subject: Algebraic Topology (math.AT)
subject: FOS: Mathematics

description: We prove that if a compact nilmanifold $Γ\backslash G$ is endowed with a Vaisman structure, then $G$ is isomorphic to the Cartesian product of the Heisenberg group with $\mathbb{R}$.
description: 10 pages; comments are welcome
Novel n-Type Silicon Solar Sell Device by Aluminium Bonding to a Glass Substrate
Creators: name: Gazuz, V.
name: Mühlbauer, M.
name: Auer, R.
Publisher: name: WIP-Munich
Year: 2009
Subjects: Wafer-based Silicon Solar Cells and Materials Technology
Mono- and Multicrystalline Silicon Materials and Cells

description: 24th European Photovoltaic Solar Energy Conference, 21-25 September 2009, Hamburg, Germany; 2206-2208
description: We present a back junction n+np+ solar cell fabricated by aluminium bonding of a n-type silicon wafer
to a low cost borosilicate glass substrate. The bonding is integrated in the solar cell processing. We have done only
one high temperature annealing step in a Rapid Thermal Processing (RTP)-oven and achieved simultaneously:
i) adhesion of a borosilicate glass to the n-type silicon wafer, ii) p-doped emitter formation at the back side of the
silicon wafer, iii) back side metal contact with p-type emitter and iv) phosphorous doping on the front side for
developing a front surface field (FSF). This process sequence is suitable for the fabrication of extra thin n-type wafer
silicon solar cells
Screen Printing in Laser Grooved Buried Contact Solar Cells: the LAB2LINE Hybrid Processes
Creators: name: Serenelli, L.
name: De Iuliis, S.
name: Izzi, M.
name: Tucci, M.
name: Salza, E.
name: Pirozzi, L.
name: Cole, A.
name: Brown, L.M.
name: Devenport, S.
name: Drew, K.
name: Heasman, K.
name: Morrison, D.J.
name: Bruton, T.
name: Dewallef, S.
Publisher: name: WIP-Munich
Year: 2010
Subjects: Wafer-Based Silicon Solar Cells and Materials Technology
Manufacturing Issues and Processing

description: 25th European Photovoltaic Solar Energy Conference and Exhibition / 5th World Conference on Photovoltaic Energy Conversion, 6-10 September 2010, Valencia, Spain; 1660-1664
description: Laser Grooved Buried Contact (LGBC) solar cell technology is an attractive way for the production of
solar cells designed to operate at one sun. Although LGBC cells can have higher efficiency when compared to
standard screen-printed solar cells, a more complex manufacturing process is required, increasing their relative costs.
In the FP6 EU funded project “Lab2Line,” screen print and LGBC solar cell processing techniques are hybridized in
order to produce lower cost high efficiency solar cells processed on large area mono-crystalline wafers, using
techniques scalable to industry. Two hybrid approaches have been considered: in the first, screen-print (SP) is
applied for both rear and front contacts; in the second process SP is applied only to the rear and then electroless
plating is used to form the front contacts.
Both Lab2Line hybrid approaches offer high average efficiencies with a small performance distribution, while
simultaneously presenting a more compact, cost effective option to production.
The combination of SP techniques with LGBC processes and electroless plating has led to a maximum efficiency of
17.34% for the first process and 18% (17.44% average on 171 wafers) for the latter. Modules having such cells result
in FF of 79.0% and efficiency of 17.0%.
Mechanical Stability in Crystalline Silicon Solar Cells
Creators: name: Cereceda, E.
name: Barredo Egusquiza, J.
name: Gutiérrez, J.R.
name: Jimeno, J.C.
Publisher: name: WIP-Munich
Year: 2010
Subjects: Wafer-Based Silicon Solar Cells and Materials Technology
Manufacturing Issues and Processing

description: 25th European Photovoltaic Solar Energy Conference and Exhibition / 5th World Conference on Photovoltaic Energy Conversion, 6-10 September 2010, Valencia, Spain; 1665-1668
description: Mechanical stability of back contact solar cells deteriorates when holes (MWT, EWT) or grooves (TWT)
are created in the wafer. These operations are essential for these structures so we found necessary to quantify the
magnitude of this damage. A set of wafers with the EWT structure was produced and its mechanical strength measured by
the Ring on Ring bending test. Other two sets of wafers with similar processes were prepared and tested to compare the
effect of different fabrication steps on mechanical strength of the wafer. A numeric model was developed to analyse the
data from the Ring on Ring test and a statistical study was carried out.
The $θ=\infty$ conjecture implies the Riemann hypothesis
Creators: name: Bettin, Sandro
name: Gonek, Steven M.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Number Theory (math.NT)
subject: FOS: Mathematics
subject: 11M06, 11M26

description: We show that the $θ=\infty$ conjecture implies the Riemann hypothesis.
description: 4 pages. To appear in Mathematika
Effects of KNO3 solution concentration and soaking duration during seed priming on germination and vigor of coriander (Coriandrum sativum L.) seeds
Creators: name: Palinee Kachornkiatpanich, Nath Pichakum
Publisher: name: Faculty of Agriculture
Year: 2023
Subjects: seed quality
speed of germination
mean germination time
days to emergence

description: Khon Kaen Agriculture Journal, 51, 1, 83-95
Searching for new yellow symbiotic stars: positive identification of StHa63
Creators: name: Baella, N. O.
name: Pereira, C. B.
name: Miranda, L. F.
name: Alvarez-Candal, A.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Yellow symbiotic stars are useful targets to probe whether mass transfer has happened in these binary systems. However, the number of known yellow symbiotic stars is very scarce. We report spectroscopic observations of five candidate yellow symbiotic stars selected by their position in the 2MASS (J-H) vs. (H-Ks) diagram and included in some emission-line catalogs. Among the five candidates, only StHa63 is identified as a new yellow symbiotic star because of its spectrum and its position in the [TiO]1-[TiO]2 diagram that indicates a K4-K6 spectral type. In addition, the derived electron density (10E8.4 cm-3) and several emission line intensity ratios provide further support for that classification. The other four candidates are rejected as symbiotic stars because three of them actually do not show emission lines and the fourth one shows only Balmer emission lines. We also found that the WISE W3-W4 index clearly separates normal K-giants from yellow symbiotic stars and, therefore, can be used as an additional tool to select candidate yellow symbiotic stars.
description: 24 pages, 3 tables, 5 figures, accepted by Astronomical Journal
Effect of growing media and bag sizes on growth of 'Hom Thong' banana plantlets
Creators: name: Apiraya Thepsukhon, Suchada Pasuk
Publisher: name: Faculty of Agriculture
Year: 2023
Subjects: Hom Thong banana
planting material
bag size
transplanting plantlet
peat moss

description: Khon Kaen Agriculture Journal, 51, 1, 96-106
Multimedia report of Intensive workshop I on acceleration, complexity and interdisciplinarity - Deliverable 2.3
Creators: name: Tola, Elisabetta
name: Contu, Francesca
Publisher: name: Zenodo
Year: 2023
Subjects: Creativity, Futures thinking, interdisciplinarity, Bologna, Science Education

description: FEDORA’s WP2 works on blind spot 2, exploring and co-creating ideas and strategies to adopt new languages and formats in science education. This work is not solely inspired by the realm of science but by breeding scientific knowledge with literary, artistic, narrative, and visual approaches. The most proficient way to discuss, define and collect insights, inspirations and ideas on how to foster these new creative approaches in science education involves creators, artists, and experts from different disciplines and fields in a co-creation session inspired by the design-derived methodologies. Due to the COVID-19 situation and the difficulties in travelling, the I creative workshop had to be organised locally, involving only people from one place, Bologna. However, a nice variety of professionals participated in the 3-hrs workshop, and the discussions and co-creation sessions held many valuable insights.
Identification and genetic variation of internal transcribed spacer (ITS) in Lasiodiplodia theobromae isolated from durian (Durio sp.)
Creators: name: Arphatsara Heedrod, Ratiya Pongpisutta
Publisher: name: Faculty of Agriculture
Year: 2023
Subjects: durian
Lasiodiplodia
ITS
ISSR

description: Khon Kaen Agriculture Journal, 51, 1, 107-123
Isolation and screening of endophytic bacteria from strawberry runner with plant growth promotion properties and antifungal activity against some fungi
Creators: name: Dolrudee Boonyapisit, Apiradee Siangsuepchart
Publisher: name: Faculty of Agriculture
Year: 2023
Subjects: endophytic bacteria
plant growth promoting-bacteria
antifungal activity
strawberry

description: Khon Kaen Agriculture Journal, 51, 1, 124-139
General monogamy relation of multi-qubit systems in terms of squared Rényi-$α$ entanglement
Creators: name: Song, Wei
name: Bai, Yan-Kui
name: Yang, Mou
name: Yang, Ming
name: Cao, Zhuo-Liang
Publisher: name: arXiv
Year: 2015
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We prove that the squared Rényi-$α$ entanglement (SR$α$E), which is the generalization of entanglement of formation (EOF), obeys a general monogamy inequality in an arbitrary $N$-qubit mixed state. Furthermore, for a class of Rényi-$α$ entanglement, we prove that the monogamy relations of the SR$α$E have a hierarchical structure when the $N$-qubit system is divided into $k$ parties. As a byproduct, the analytical relation between the Rényi-$α$ entanglement and the squared concurrence is derived for bipartite $2\otimes d$ systems. Based on the monogamy properties of SR$α$E, we can construct the corresponding multipartite entanglement indicators which still work well even when the indicators based on the squared concurrence and EOF lose their efficacy. In addition, the monogamy property of the $μ$-th power of Rényi-$α$ entanglement is analyzed.
description: 8 pages, 5 figures, any comments are welcome
“I kind of gave up on it after a while, became too hard, closed my eyes, didn't want to know about it”—adults with type 1 diabetes mellitus describe defeat in the context of low social support
Creators: name: Ward, Paul
Publisher: name: Torrens University Australia
Year: 2023
Subjects: Social determinants of health

description: Type 1 diabetes mellitus (T1DM) is a lifelong condition that requires diligent self-management to avoid complications. Living with T1DM is a considerable challenge and the inability to follow a prescribed regimen is often termed non-compliance. However, this fails to acknowledge that for some people the barriers to glycaemic control may be insurmountable. Objective: This qualitative study explores the structural determinants, social context and lived experience of T1DM with 17 adults to understand influences on patterns of self-care, engagement with and trust in health-care services, and health outcomes. Results: Their stories tell us that strong social support is vital to disease adaptation and ongoing management. When social support is absent, the story is one of struggling with intensive diabetes management alone and difficulty controlling blood glucose levels. When confronted with suboptimal glycaemic control, participants isolated from social support developed combative relationships with health-care providers and disengaged from health care. Their subsequent slide to chronic comorbid illness is steep and this study reveals the heartache and loss experienced when difficult life circumstances and low levels of social support have led to irreparable kidney damage. Conclusion: Patterns of poor glycaemic control viewed in the health-care encounter without an understanding of the context or life circumstances in which they are occurring can lead to an inability to engage with health-care services. Disengagement from services and the absence of specialist care further isolates people, leaving them managing their diabetes alone with limited success.
Voltage-dependent spin flip in magnetically-substituted graphene nanoribbons: Toward the realization of graphene-based spintronic devices
Creators: name: Houchins, Gregory
name: Crook, Charles B.
name: Zhu, Jian-Xin
name: Balatsky, Alexander V.
name: Haraldsen, Jason T.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We examine the possibility of using graphene nanoribbons (GNRs) with directly substituted chromium atoms as spintronic device. Using density functional theory, we simulate a voltage bias across a constructed GNR in a device setup, where a magnetic dimer has been substituted into the lattice. Through this first principles approach, we calculate the electronic and magnetic properties as a function of Hubbard U, voltage, and magnetic configuration. By calculating of the total energy of each magnetic configuration, we determine that initial antiferromagnetic ground state flips to a ferromagnetic state with applied bias. Mapping this transition point to the calculated conductance for the system reveals that there is a distinct change in conductance through the GNR, which indicates the possibility of a spin valve. We also show that this corresponds to a distinct change in the induced magnetization within the graphene.
description: 6 pages, 6 figures, Submitted for publication
Metallisation for Silicon Heterojunction Solar Cells
Creators: name: Zicarelli Fernandez, F.
name: Descoeudres, A.
name: Choong, G.
name: Bôle, P.
name: Barraud, L.
name: De Wolf, S.
name: Ballif, C.
Publisher: name: WIP-Munich
Year: 2010
Subjects: Wafer-Based Silicon Solar Cells and Materials Technology
Manufacturing Issues and Processing

description: 25th European Photovoltaic Solar Energy Conference and Exhibition / 5th World Conference on Photovoltaic Energy Conversion, 6-10 September 2010, Valencia, Spain; 1669-1672
description: In recent years, Silicon Heterojunction Solar Cells (SHJ) have attracted considerable attention for their high efficiency
potential at reasonable cost. The processing-sequence consists of thin amorphous-silicon layers deposition for emitter and
back-surface field formation on textured silicon wafers. On top of these, transparent conductive oxides (TCOs) are
deposited and finally the cells are metalized. Currently the most popular method of metallization is Screen Printing but
other methods of pattern deposition are emerging as potential candidates. This paper looks at the relative advancements
in the stencil printing technology for SHJ to help achieve high aspect ratio conductor traces. We show that fine lines
down to 35 microns and high aspect with aspect ratio of 1:1 at 65 μm width are achievable using low curing temperature
paste. We finally show how such contacts can lead up to 20% efficient 2x2 cm2 cells.
Evidence for High-Frequency QPOs with a 3:2 Frequency Ratio from a 5000 Solar Mass Black Hole
Creators: name: Pasham, Dheeraj R.
name: Cenko, S. Bradley
name: Zoghbi, Abderahmen
name: Mushotzky, Richard F.
name: Miller, Jon
name: Tombesi, Francesco
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Following the discovery of 3:2 resonance quasi-periodic oscillations (QPOs) in M82X-1 (Pasham et al. 2014), we have constructed power density spectra (PDS) of all 15 (sufficiently long) {\it XMM-Newton} observations of the ultraluminous X-ray source NGC1313X-1 ($L_{X}$ $\approx$ 2$\times$10$^{40}$ erg/sec). We detect a strong QPO at a frequency of 0.29$\pm$0.01 Hz in data obtained on 2012 December 16. Subsequent searching of all the remaining observations for a 3:2/2:3 frequency pair revealed a feature at 0.46$\pm$0.02 Hz on 2003 Dec 13 (frequency ratio of 1.59$\pm$0.09). The global significance of the 0.29 Hz feature considering all frequencies between 0.1 and 4 Hz is $>$ 3.5 $σ$. The significance of the 0.46$\pm$0.02 Hz QPO is $>$ 3.5$σ$ for a search at 2/3 and 3/2 of 0.29 Hz. We also detect lower frequency QPOs (32.9$\pm$2.6 and 79.7$\pm$1.2 mHz). All the QPOs are super-imposed on a continuum consisting of flat-topped, band-limited noise, breaking into a power-law at a frequency of 16$\pm$3 mHz and white noise at $\gtrsim$ 0.1 Hz. NGC1313X-1's PDS is analogous to stellar-mass black holes' (StMBHs) PDS in the so-called steep power-law state, but with the respective frequencies (both QPOs and break frequencies) scaled down by a factor of $\sim$ 1000. Using the inverse mass-to-high-frequency QPO scaling of StMBHs, we estimate NGC1313X-1's black hole mass to be 5000$\pm$1300 $M_{\odot}$, consistent with an inference from the scaling of the break frequency. However, the implied Eddington ratio, L$_{Edd}$ $>$ 0.03$\pm$0.01, is significantly lower compared to StMBHs in the steep power-law state (L$_{Edd}$ $\gtrsim$ 0.2).
description: Published in ApJ Letters
Effect of sugarcane straw management on germination and tillering of ratoon cane
Creators: name: Wimon Phukongchai And Wanwipa Kaewpradit
Publisher: name: Faculty of Agriculture
Year: 2023
Subjects: sugarcane straw management
burn
mulch
LDD1

description: Khon Kaen Agriculture Journal, 51, 1, 151-161
The study of the ratio of rice husk combined with cassava peel compost on soil properties in salt affected soil in Buriram province
Creators: name: Arthapon Phluengthaisong, Thammared Chuasavathi
Publisher: name: Faculty of Agriculture
Year: 2023
Subjects: organic material
rice husk
cassava peel
saline soil
soil properties

description: Khon Kaen Agriculture Journal, 51, 1, 162-171
Practical Experiences With the PV Powered Computer Mouse "Sole-Mio"
Creators: name: Reich, N.H.
name: Elzen, B.
name: Netten, M.P.
name: Van Sark, W.G.J.H.M.
name: Alsema, E.A.
name: Veefkind, M.
name: Silvester, S.
Publisher: name: WIP-Munich
Year: 2008
Subjects: Components for PV Systems
Engineering and System Integration

description: 23rd European Photovoltaic Solar Energy Conference and Exhibition, 1-5 September 2008, Valencia, Spain; 3121-3125
description: The research objective of the SYN-Energy project is to improve the understanding of solar-powered electrical devices. One of the activities has been the design and technical realization of a PV powered wireless computer mouse. In total, 15 “Sole Mio” PV powered mice have been manufactured. In this paper, we describe how test-users experienced working with the “Sole Mio” prototypes and discuss the rather bad energetic performances of some of the prototypes. Amongst these technical aspects, particularly user expectations and satisfaction with the Sole Mio concept are presented, and possible improvements of the design are evaluated. Finally, an attempt is made to extend the lessons learned for the specific “Sole Mio” case to a more general level of the design and testing of solar-powered consumer products. Here, it is found that future user related research should focus on quantitative investigations rather than qualitative evaluations: in how far and to what extent users are willing to expose device integrated PV (DIPV) devices to solar radiation pro-actively.
Application of different organic residues on decomposition pattern, microbial activity and some properties in salt affected coarse texture soil
Creators: name: Sakuntala Supasai, Vidhaya Trelo-Ges
Publisher: name: Faculty of Agriculture
Year: 2023
Subjects: salt affected coarse texture soil
organic residue
decomposition rate
microbial activity
microbial biomass

description: Khon Kaen Agriculture Journal, 51, 1, 187-209
‘If your child’s vaccinated, why do you care about mine?’ Rhetoric, responsibility, power and vaccine rejection
Creators: name: Ward, Paul
Publisher: name: Torrens University Australia
Year: 2023
Subjects: Social determinants of health

description: The social responsibility logic underpinning vaccination is omnipresent in the rhetoric surrounding its acceptance and rejection. People who reject vaccination are constantly faced with arguments from the vaccinating mainstream to which they must respond. Understanding the conceptual world of vaccine rejection requires us to understand how vaccine sceptics construct answers to complaints that their choices endanger other people. This article analyses interviews with 29 vaccine-sceptical parents who are presented with claims that their choices are not just morally wrong, but dangerous to others. We argue that vaccine rejecters possess power because their decisions can result in the transmission of infectious diseases through their communities. However, they refuse to acknowledge this power because, through a variety of rationalisations, they do not accept the logic of community protection (herd immunity) and social responsibility. Strategies to prompt parents’ consideration of others can include breaking out of the ontologically individualistic framing of the disagreement.
Operational Forecast of PV Production
Creators: name: Remund, J.
name: Schilter, C.
name: Dierer, S.
name: Stettler, S.
name: Toggweiler, P.
Publisher: name: WIP-Munich
Year: 2008
Subjects: Components for PV Systems
Engineering and System Integration

description: 23rd European Photovoltaic Solar Energy Conference and Exhibition, 1-5 September 2008, Valencia, Spain; 3138-3140
description: The paper shows an example of an operational PV production forecast for large PV power stations. Radiation forecast based on GFS/WRF model is used as input of the PV yield control tool Spyce. The uncertainty is calculated with a statistical model based on existing examinations. A way to eliminate the bias of the models is shown. The service will be further developed.