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7.3 QUANTUM EFFICIENCY MEASUREMENTS
The LIDA-SRS-KIT allows researchers to measure Quantum Efficiency (QE), also known as
Incident Photon to Charge Carrier Efficiency (IPCE), for solar cells, detectors, or any other photon-
to-charge converting device.
TracQ Basic software allows the LIDA-SRS-KIT and Oriel Monochromators to coordinate their
operation in order to obtain QE data. TracQ Basic features built-in QE measurement functionality
which allows signal data from the LIDA-SRS-KIT to be displayed in real time.
Items needed to build the setup shown in Figure 23:
•
LIDA-SRS-KIT
•
Monochromator (example: Oriel model CS260-USB-Q-FH-A)
•
Amplified, calibrated detector (example: Oriel model DET-L-SIUV-R-C)
•
Sample solar cell or uncalibrated detector
•
Tunable Light Source, 300W Xenon (Oriel model TLS-300X)
The user selects the grating and filter changeover wavelengths for the monochromator and
motorized filter wheel. The SR810 parameters are set up, as well as the scan parameters. A
reference scan of a detector or sample with known spectral responsivity is taken. This is followed
by a scan of the device for which QE needs to be determined. This data is plotted and can be
saved to a file. The TracQ Basic user's manual provides further information on performing QE
scans.
Family of Brands – ILX Lightwave
Figure 23: QE Measurement Configuration
• New Focus™ • Ophir
®
MLIDA, Rev A
• Corion • Richardson Gratings™ • Spectra-Physics
®
®
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