期刊
PROGRESS IN PHOTOVOLTAICS
卷 19, 期 1, 页码 93-96出版社
WILEY-BLACKWELL
DOI: 10.1002/pip.976
关键词
Cu2ZnSnS4; CZTS; evaporation; thin film solar cells
Solar cells based on kesterite-type Cu2ZnSnS4 (CZTS) were fabricated on molybdenum coated soda lime glass by evaporation using ZnS, Sn, Cu, and S sources. The coevaporation process was performed at a nominal substrate temperature of 550 C and at a sulfur partial pressure of 2-3 x 10(-3) Pa leading to polycrystalline CZTS thin films with promising electronic properties. The CZTS absorber layers were grown copper-rich, requiring a KCN etch step to remove excess copper sulfide. The compositional ratios as determined by energy-dispersive X-ray spectroscopy (EDX) after the KCN etch are Cu/(Zn + Sn): 1.0 and Zn/Sn: 1.0. A solar cell with an efficiency of 4.1% and an open-circuit voltage of 541 mV was obtained. Copyright (C) 2010 John Wiley & Sons, Ltd.
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