CIGSS Thin Film Solar Cells: Final Subcontract Report, 10 October 2001-30 June 2005

Dhere, N. G.

National Renewable Energy Laboratory (U.S.)

关键词: Alloys;    Thin Films Pv;    Manufacturing;    Solar Cells;    36 Materials Science;   

DOI  :  10.2172/876707
RP-ID  :  NREL/SR-520-39486
RP-ID  :  AC36-99-GO10337
RP-ID  :  876707

美国|英语

来源: UNT Digital Library

【 摘 要 】

This report describes the I-III-VI2 compounds that are developing into a promising material to meet the energy requirement of the world. CuInSe2 (CIS) and its alloy with Ga and S have shown long-term stability and highest conversion efficiency of 19.5%. Among the various ways of preparing CuIn1-xGaxSe2-ySy (CIGSS)/CdS thin-film solar cells, co-evaporation and sputtering techniques are the most promising. Sputtering is an established process for very high-throughput manufacturing. ARCO Solar, now Shell Solar, pioneered the work in CIS using the sputtering technique. The two-stage process developed by ARCO Solar involved sputtering of a copper and indium layer on molybdenum-coated glass as the first step. In the second step, the copper-indium layers were exposed to a selenium-bearing gas such as hydrogen selenide (H2Se) mixed with argon. The hydrogen selenide breaks down and leaves selenium, which reacts and mixes with the copper and indium in such a way to produce very high-quality CIS absorber layer. Sputtering technology has the added advantage of being easily scaled up and promotes roll-to-roll production on flexible substrates. Preliminary experiments were carried out. ZnO/ZnO:Al deposition by RF magnetron sputtering and CdS deposition by chemical-bath deposition are being carried out on a routine basis.