Potential-Induced Degradation of CuIn1-xGaxSe2 Thin Film Solar Cells
2013 (English)In: IEEE Journal of Photovoltaics, ISSN 2156-3381, Vol. 3, no 3, 1090-1094 p.Article in journal (Refereed) Published
The use of Na-free or low Na content glass substrates is observed to enhance the resiliency to potential-induced degradation, as compared with glass substrates with high Na content, such as soda lime glass (SLG). The results from stress tests in this study suggest that degradation caused by a combination of heat and bias across the SLG substrate is linked to increased Na concentration in the CdS and Cu(In,Ga)Se-2 (CIGS) layers in CIGS-based solar cells. The degradation during the bias stress is dramatic. The efficiency drops to close to 0% after 50 h of stressing. On the other hand, cells on Na-free and low Na content substrates exhibited virtually no efficiency degradation. The degraded cells showed partial recovery by resting at room temperature without bias; thus, the degradation is nonpermanent and may be due to Na migration and accumulation rather than chemical reaction.
Place, publisher, year, edition, pages
2013. Vol. 3, no 3, 1090-1094 p.
Cu(In, Ga)Se-2 (CIGS), photovoltaics, potential-induced degradation, thin film solar cells
Engineering and Technology
Research subject Engineering Science with specialization in Electronics
IdentifiersURN: urn:nbn:se:uu:diva-204264DOI: 10.1109/JPHOTOV.2013.2253833ISI: 000320862500024OAI: oai:DiVA.org:uu-204264DiVA: diva2:638428