Cu2ZnSnSe4 thin film solar cells prepared by rapid thermal annealing of co-electroplated Cu-Zn-Sn precursors
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- 作者：YongZheng Zhang ; Cheng Liao ; Kai Zong ; Hao Wang ; JingBing Liu ; Tao Jiang ; JunFeng Han ; GuoQiang Liu ; Liang Cui ; QinYan Ye ; Hui Yan ; WoonMing Lau
- 关键词：Cu2ZnSnSe4 (CZTSe) ; Electrodeposition ; Rapid thermal annealing ; Thin film solar cell
- 刊名：Solar Energy
- 出版年：2013
- 出版时间：August, 2013
- 年：2013
- 卷：94
- 期：Complete
- 页码：1-7
- 全文大小：1558 K
文摘
Cu2ZnSnSe4 (CZTSe) thin films were prepared by selenization of co-electrodeposited Cu-Zn-Sn precursors, which were electrodeposited on Mo-coated glass substrates in one-step process. Two annealing processes, rapid thermal annealing (RTA) and conventional furnace annealing (CFA), were carried out for selenizing the precursors at 500 ¡ãC. The structure and morphology of the CZTSe thin films were characterized using X-ray diffraction (XRD), Raman spectroscopy, scanning electron microscopy (SEM), and energy dispersive X-ray spectroscopy (EDS). It is found that the RTA process benefits the formation of single phase CZTSe absorbers with large grains and the energy band gap of CZTSe film is 0.98 eV. Photovoltaic cells with the structure of glass/Mo/CZTSe/CdS/i-ZnO/ZnO:Al were fabricated using the RTA-CZTSe films as absorbers. The highest efficiency of 4.5 % so far for a co-electrodeposited CZTSe solar cell was achieved.