The Influence of Heating Time and Temperature on the Properties of CIGSSe Solar Cells

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Abstract

Nonencapsulated CIGSSe solar cells, with a silver grid, were exposed to different temperatures for various periods in order to measure the effect of the heat exposure in CIGSSe modules. The heat treatment time and temperature were varied during the experiments, which were executed at atmospheric conditions. In all the cases, after reaching a temperature of about 300°C, the IV measurement showed a reduction of 2-3% in terms of V O C and J S C. This is confirmed, respectively, by Raman and EQE measurements as well. The efficiency drop was -7%, -29%, and -48%, respectively, for 30 seconds, 300 seconds, and 600 seconds of exposure time. With temperatures larger than 225°C, the series resistance starts to increase exponentially and a secondary barrier becomes visible in the IV curve. This barrier prevents the extraction of electrons and consequently reducing the solar cells efficiency. Lock-in thermography demonstrated the formation of shunts on the mechanical scribes only for 300 and 600 seconds exposure times. The shunt resistance reduction is in the range of 5% for all time periods.

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APA

Flammini, M. G., Debernardi, N., Le Ster, M., Dunne, B., Bosman, J., & Theelen, M. (2016). The Influence of Heating Time and Temperature on the Properties of CIGSSe Solar Cells. International Journal of Photoenergy, 2016. https://doi.org/10.1155/2016/4089369

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