期刊
SOLAR ENERGY MATERIALS AND SOLAR CELLS
卷 119, 期 -, 页码 163-168出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.solmat.2013.05.058
关键词
Cu(In,Ga)Se-2; Thin films; Solar cells; Mini-modules; Soda-lime glass
资金
- New Energy and Industrial Technology Development Organization (NEDO) under the Ministry of Economy, Trade and Industry (METI)
In this paper, we report a recent progress in Cu(In,Ga)Se-2 (CIGS) solar cells and mini-modules demonstrated on soda-lime glass (SLG) substrates, which are one of the most common and cost effective substrate materials for chalcopyrite photovoltaics. CIGS absorber layers grown by the three-stage co-evaporation process was used with an optimized [Se]/[metal] flux ratio and preferable substrate temperatures for SLG substrate thicknesses. SLG substrates of 0.28-1.1 mm in thickness, which are thinner than that generally used in laboratories and industries (similar to 2-3 mm), were employed to develop techniques for further reductions of material cost and module weight. Solar cell and mini-module efficiencies of > 19% and > 17%, respectively, with relatively high open circuit voltages (V) and fill factors (FF) (V-oc 0.77 V and FF 0.79 for cells, and V-oc 0.77 V and FF 0.74 for mini-modules) were demonstrated using a composition ratio [Ga]/([In]+[Ga]) of 0.45 for the CIGS absorber layers. Key techniques and future directions toward highly efficient CIGS solar cells and modules with high values of V., and FF are discussed. (C) 2013 Elsevier B.V. All rights reserved.
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