Damp Heat Treatment of Cu(In,Ga)Se2 Solar Cells with Different Sodium Content

Materials

Felix Daume¹  Stefan Puttnins¹  Christian Scheit¹  Hendrik Zachmann¹  Andreas Rahm¹  Alexander Braun¹ 

[1] Solarion AG, Ostende 5, Leipzig 04288, Germany; E-Mails:

关键词: CIGSe;    long-term stability;    degradation;    damp heat;    sodium;   

DOI  :  10.3390/ma6125478

来源: mdpi

【 摘 要 】

Long term stability is crucial to maturing any photovoltaic technology. We have studied the influence of sodium, which plays a key role in optimizing the performance of Cu(In,Ga)SeC) was used to simulate aging of the unencapsulated cells in multiple time steps while they were characterized by current-voltage analysis, capacitance-voltage profiling, as well as electroluminescence imaging. By comparing the aging process to cells that were exposed to heat only, it could be confirmed that moisture plays the key role in the degradation process. We found that cells with higher sodium content suffer from a more pronounced degradation. Furthermore, the experimental results indicate the superposition of an enhancing and a deteriorating mechanism during the aging process. We propose an explanation based on the corrosion of the planar contacts of the solar cell.

【 授权许可】

CC BY   
© 2013 by the authors; licensee MDPI, Basel, Switzerland.