 This compact instrument with fully automatic operation allows user to perform IPCE measurement by one click.
 User-friendly simple operation interface allows to start measurement quickly without reading bulky manuals and setting up variousparameters.
 State-of-the-art Bluetooth communication allows user to control all the functions remotely.
 No attached equipments such as lock-in amplifier, source meter, and lamp power supply, only the main power switch needs to turn on.
 Utilize 100 % Digital Signal Processing (DSP) technique with Fast Fourier Transform (FFT) to measure synchronous current producedwith chopped light beam.
 The double beam technique with a Si reference cell measures sample current & light intensity simultaneously.
 The motorized sample mounting stage aligns sample precisely.

Specifications
Type of Measurement

Incident Photon-to-electron Conversion Efficiency(IPCE), Spectral response (A/W)

Recommended
sample size

10 mm x 10 mm

Wavelength Range

340 - 1000 nm (calibrated photo diode limits).
0 - 1400 nm mechanical limit.

White light (bias)
sourceThree watts white LED (output power can be set through thesoftware).

Light Source

Halogen Photo Optic Lamp (OSRAM XENOPHOT®)
3400 K.

Sample mounting
stageThis system equipped with motorized sample mounting
stage. User can remotely switch the sample and standard Si
photo diode in order to do baseline calibration or verify
accuracy of measurements.

Irradiation modes

Natural (Halogen lamp spectrum)
Constant energy
Constant photon(Constant energy or photon Irradiation mode isachieved by controlling the halogen lamp current.
Automatic calibration process performs thecalibration of lamp current to keep constant energy
or photon output).

User Interface anddata collection

Computer software is provided free of charge to control all of
the functions and data logging. Measurement data can besaved as a text file and directly plotted on ®Microsoft Excelgraph. User interface is designed such that normal user canbe performed measurements by setting just the scan
wavelength range. Also advanced user can control hardware
settings such as grating and filter changing position FFT binsize and also able to get raw I vs. t and FFT data.

Irradiation monochromatic
light power on sample

1 to 100 μW (400 - 1000 nm range)

CommunicationBluetoothMeasuring technique

Optically chopped (1 – 21 Hz) light beam is split into
two parts (double beam technique) then incident on
Device-Under-Test (DUT), and calibrated Si reference(REF) cell. Simultaneously digitized DUT and REF
signals (short circuit currents) were Fast Fourier
Transform (FFT) to obtain power spectrum (filter out
only the chopped frequency component).

Power
Requirement

100 – 240 VAC (50-60 Hz)
Input voltage selection switch available to set the correct
input voltage range.

Dimensions
Weight91 cm x 47 cm x 29 cm,20 kgPC

Windows based PC is needed to install control software,
despite not included to the standard setup and can be added
as a option.

Grating

1200G / 500nm blaze.

Filters

Up to 5 different high-order light cut filters can beinstalled. L-37 and R-64 installed.

SPD Laboratory, Inc.

2-35-1 Johoku, Hamamatsu, 432-8011, JAPAN
Tel: +81-53-474-7901 Fax: +81-53-401-7080
Email: inq@spd-lab.com
Web: http://www.spdlab.com/English/VK-IPCE-10.html

IPCE & Spectral Response Measurement System“Control Panel” tab allows user to control all of functions such as sample stage position, lamp current, chopper speed, and filters. Also user can measure bothoutput of the sample and reference at desired wavelength.

“IPCE” tab of the control software allows user to set scan range, Irradiationmode, and plot options. Also user can open previously saved baseline
calibration curve or start new calibration curve. Si photo diode was used as asample for reference.

“Spectral Response” tab shows the spectral sensitivity (A/W) curve ofmeasured sample. Si photo diode was used as a sample in this example.

IPCE & Spectral Response Measurement System“I-t Data” tab shows the time domain data taken for each measurement point. User can view data as 2D or 3D plot for select number ofmeasurement points.

“FFT Data” tab shows the Fourier transformed data for each measurement point. User can view data as 2D or 3D plot for select numberof measurement points.

IPCE & Spectral Response Measurement System

Incident optical power on the sample during an IPCE measurement withnatural irradiation mode. In this mode halogen lamp operating current keeps
at a user set fixed value.

Lamp calibration curve taken for constant energy irradiation mode. Green
curves shows 2 μW constant incident optical power on the sample and blue
curve shows the halogen lamp current variation for keeps constant power on
the sample.

Lamp calibration curve taken for constant photon irradiation mode. Green
curves shows 1.0 x 1013 s-1 constant photon flux on the sample and blue curveshows the halogen lamp current variation to keep the constant photon flux on
the sample.

The optical power dividing ratio of sample to reference is measured and stored
as a baseline calibration curve. This figure shows an example of the baseline
calibration curve.

IPCE & Spectral Response Measurement System“Data Save Options” tab allow user to specify data file and calibration file saving folders in the computer. Also user can select desired
output file formats in this screen.

“Advanced Settings” tab has several important machine parameters such as communication port, measuring ranges, FFT sample size,ADC speed. Parameters such as filter and grating changing position were not need to modify during normal operation.

SignalFFT based DSP is used to measure DUT current

SPD Laboratory, Inc.

2-35-1 Johoku, Hamamatsu, 432-8011, JAPAN
Tel: +81-53-474-7901 Fax: +81-53-401-7080 Email: inq@spd-lab.com
Web: http://www.spdlab.com/English/VK-IPCE-10.html