Gimo
Gimo (Grating Monochromator) is a system for the spectral response (SR) analysis of silicon solar cells, thin film and III-V multijunction concentrator solar cells.
Technical Specification
- Charakterisation of samples from 1x1 mm up to 10x10 mm
- Spectral Response (SR) and External Quantum Efficiency (EQE) Measurement
- Wave length 300nm -1150nm (silicon solar cells); 300nm - 1850nm (III-V solar cells)
- Step width down to 1nm
- Operator defined measurement range
- Mismatch factor calculation
- Small spot monochromatic light for silicon cells with high homogeneity
- Possibility to apply up to three different bias light spectra
- Additional monitor cell for IR range up to 1900 nm
- Monochromatic light generated by full automated scanning double monochromators with up to three gratings, selected for optimum usage with triple junction cells, automated scanning and grating changer, order filter wheel by GPIB control
- Up to three bias light sources equipped with individual filters, independently controlled by high stability power sources
- Filters for bias light sources selected for the requirements of measuring individual junctions of dual and triple junction solar cells
- Monitor cell assembly including automated monitor cell changer and two monitor cells, covering the full spectral range
- Automated measurement of test-cell and monitor-cell currents with custom designed pre-amplifiers and two dual-phase digital lock-in amplifiers
- 1000 W Xe short arc light source with high stability power supplies, collimator for coupling into monochromator entrance slit
- Thermostat controlled sample stage (STD)
- Light beam chopper with digital control
- Software for measurement control, data display, data evaluation and data documentation
- Rack mount 19" IBM compatible PC with MS-Windows operating system
- Custom Software written with LabViewTM (National Instruments Corp., USA)