Journal
ELECTROCHEMICAL AND SOLID STATE LETTERS
Volume 9, Issue 8, Pages A382-A385Publisher
ELECTROCHEMICAL SOC INC
DOI: 10.1149/1.2208011
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Cu(In,Ga)Se-2(CIGS) films were deposited by three-stage co-evaporation of elemental sources and effects of Se flux on CIGS film were investigated. With an appropriate Se flux (15 angstrom/s), faceted and tightly connected CIGS grains were developed at the film surface, and the highest conversion efficiency, 17.57%, was achieved in CdS/CIGS solar cells. When the Se flux was high, large grains with less (112) preferred orientation and pores along the grain boundaries were observed. As a result, the cell conversion efficiency was deteriorated. Precise control of Se flux, especially at the third stage, was critical to obtain high-performance CIGS solar cells. (c) 2006 The Electrochemical Society.
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