FiMo
With the Filter-Monochromator system (FiMo) solar cells are tested using monchromatic light produced by a Xenon short arc light source to simulate outdoor conditions. A temperature controlled sample stage (STD) is used for sample fixation and electrical contacting. With a transimpedance amplifier the signal from the solar cell under test is transferred to a digital lock-in amplifier, forwarding the measurement data to the controlling Personal Computer (PC). The PC processes data, maintains calibration information, saves raw test data in ASCII-Format and produces measurement reports.
Technical Specification
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Measurement of standard silicon solar cells
- Cell sizes up to 156x156 mm with 1000 W Xenon short arc lamp
- Cell sizes up to 210x210 mm with 2000 W Xenon short arc lamp
- Wavelength from 350 to 1150 nm
- 40 different filters, step width >25 nm
- Full irradiation of the solar cell with monochromatic and bias light
- Temperature controlled measurement block
- Vacuum for good thermal and electrical contact between block and sample
- Digital Lock-in amplifier
- Transimpedance amplifier for signal detection and conditioning
- White bias-light source option
- Intensity of the Xe short arc lamp stabilized by a monitor cell loop back control unit
- Rack mount 19" IBM compatible PC with MS-Windows operating system
- Custom Software written with LabViewTM (National Instruments Corp., USA)
