Modification of back electrode with WO3layer and its effect on Cu2ZnSn(S,Se)4-based solar cells

	Modification of back electrode with WO3layer and its effect on Cu2ZnSn(S,Se)4-based solar cells
	Shi, K.; B. Yao; Y. Li; Z. Ding; R. Deng; Y. Sui; Z. Zhang; H. Zhao and L. Zhang
	2017
摘要	In the present work, we designed and prepared Cu2ZnSn(S,Se)4(CZTSSe)-based solar cells with a new structure of Al/ITO/ZnO/CdS/CZTSSe/WO3/Mo/SLG (S1-5) by depositing about 5-nm-thick WO3layer with monoclinic structure on the back electrode Mo/SLG of solar cells with the convention structure of Al/ITO/ZnO/CdS/CZTSSe/Mo/SLG (S2), with the aim of improving the power conversion efficiency (PCE) of CZTSSe-based solar cells. It is found that the average open circuit voltage (Voc) increases from 346.7 mV of the S2 cells to 400.9 mV of the S1-5 cells, the average short circuit current density (Jsc) from 26.4 mA/cm2to 32.1 mA/cm2and the filling factor (FF) from 33.8 to 40.0 by addition of the WO3layer, which results in that the average PCE increases from 3.10% of the S2 cells to 5.14% of the S1-5 cells. The average increasing percent of the PCE is 65.8%. The increase in Voc, Jscand FF of the S1-5 cells compared to the S2 cells is attributed to that the WO3layer prevent the Se coming from Se ambient and CZTSSe to react with the Mo to form MoSe2and other second phases, which makes the shunt resistance (Rsh) of the S1-5 increase and the series resistance (Rs) and reverse saturation current density (J0) decrease compared to the S2 cells. The decreased J0is main factor of improvement of the PCE. A mechanism of influence of the Rsh, Rsand J0on the PCE is also revealed. Our result demonstrates that addition of the WO3layer with a reasonable thickness can be a promising technical route of improving the PCE of the CZTSSe-based solar cell. 2017 Elsevier Ltd.
收录类别	ei
语种	英语
文献类型	期刊论文
条目标识符	http://ir.ciomp.ac.cn/handle/181722/59183
专题	中科院长春光机所知识产出
推荐引用方式 GB/T 7714	Shi, K.,B. Yao,Y. Li,et al. Modification of back electrode with WO3layer and its effect on Cu2ZnSn(S,Se)4-based solar cells[J],2017.
APA	Shi, K..,B. Yao.,Y. Li.,Z. Ding.,R. Deng.,...&H. Zhao and L. Zhang.(2017).Modification of back electrode with WO3layer and its effect on Cu2ZnSn(S,Se)4-based solar cells..
MLA	Shi, K.,et al."Modification of back electrode with WO3layer and its effect on Cu2ZnSn(S,Se)4-based solar cells".(2017).

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