[14a-A34-1~7] 13.10 Compound solar cells

[14a-A34-7] Investigation on time-dependent changes in thin-film photovoltaic modules due to outdoor exposure

〇Sungwoo Choi¹, Ritsuko Satou¹, Tetsuyuki Ishii², Yasuo Chiba¹, Atsushi Masuda¹ (1.AIST, 2.CRIEPI)

Keywords:solar cells, PV modules, CIGS

The performance of PV modules deteriorates due to outdoor exposure. Once a year, the exposed modules were removed and measured under standard test condition using a solar simulator. The output values of PV modules were measured indoors and normalized to nominal values. In CIGS PV modules, the normalized maximum power (P_MAX) differs by type. The output power of CdTe PV modules is significantly reduced after outdoor exposure for three years. These results help in determining the characteristics of time-dependent changes in P_MAX for PV modules due to outdoor exposure. We will investigate time-dependent changes for CIGS and CdTe PV modules due to outdoor exposure, focusing on particular degradation factors, to develop an accurate power generation evaluation method.