Cd-Free Flexible Cu(In,Ga)Se2 Thin Film Solar Cells with ZnS(O,OH) Buffer Layers on Ti Foils
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概要
- 論文の詳細を見る
Cd-free flexible Cu(In,Ga)Se2 (CIGS) solar cells with ZnS(O,OH) buffer layers were fabricated on Mo-coated Ti foils. The CIGS thin films were deposited by the three-stage process at substrate temperatures of 460--550 °C. The influence of the substrate temperature during CIGS deposition on film properties and cell performance has been mainly investigated by scanning electron microscopy (SEM), X-ray diffraction (XRD), and secondary ion mass spectroscopy (SIMS) analyses. A double grading of $\text{Ga}/(\text{In}+\text{Ga})$ atomic ratio required to achieve high efficiency devices was formed at a substrate temperature of 500 °C. The best ZnS(O,OH)/CIGS solar cell yielded a total area efficiency of 17.9% by optimizing cell fabrication conditions. The importance of surface smoothness of Ti foil substrates is also discussed.
- 2009-07-25
著者
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Nakada Tokio
Department Of Dermatology Showa University School Of Medicine
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Yagioka Takeshi
Department of Electrical Engineering and Electronics, Aoyama Gakuin University, 5-10-1 Sagamihara, Kanagawa 229-8558, Japan
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