Musim

The current-voltage characteristic of tandem or triple solar cells depends on the radiation spectrum. The measurement results form the basis for developing an optimal cell design, e.g. for current matching with regard to a specific radiation spectrum such as AM 0 for extra-terrestrial applications. Our measurements help to determine the optimisation potential which can be achieved by measurement series, simulations and the evaluation of individual parameters.

The system multi-source simulator (Musim) can simulate almost any radiation spectrum specified by international standards (IEC 60904-3) with the help of three light sources and the associated dichroic reflectors. This allows the precise measurement of efficiency values under Standard Test Conditions (STC).

Technical Specification

• Characterisation of tandem or triple solar cells and very simple adaptation to specific requirements
  
• Measurement of the short circuit current ISC, the open circuit voltage VOC, the fill factor FF, the current-voltage characteristic (I-V characteristic), the maximum power PMPP at the corresponding voltage VMPP and current IMPP, the current density JSC and the efficiency value
  
• Determination of the spectral metrics of multiple-junction solar cells
  
• Determination of the temperature coefficients in the temperature range from 0 °C to +80 °C
  
• Sample size up to 40x40 mm
  
• Exact adjustment of the intensity by thickness compensation for the solar cell
  
• Temporal stability of the radiation exceeding 99.8%
  
• Light sources: a xenon lamp with 2500 W; two halogen lamp arrays, each with 1500 W