The effects of sweep rate, voltage bias and light soaking on the measurement of CIS-based solar cell characteristics

Recent work by several groups has shown that the efficiency of CuInSe/sub 2/ (CIS) solar cells often increases after light soaking. The authors have found that the voltage sweep rate may also have a large effect on the measured fill factor. This complicates the accurate measurement of the performance of CuInSe/sub 2/ and other I-III-VI/sub 2/ solar cells. Devices would have to be pre-light soaked and tested only under constant illumination with a slow voltage ramp rate to most closely simulate a module in operation.<
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