Influence of selenium evaporation temperature on the structure of CuEZnSnSe4 thin film deposited by a co-evaporation process

Cu2ZnSnSe4 （CZTSe） thin film solar cells have been fabricated using a one-step co-evaporation technique. The structural properties of polycrystalline CZTSe films deposited at different selenium evaporation temperatures （TSe） have been investigated using X-ray diffraction spectra, scanning electron m...

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Published in半导体学报：英文版 no. 4; pp. 74 - 77
Main Author 孙顶 许盛之 张力 陈泽 葛阳 王宁 梁雪娇 魏长春 赵颖 张晓丹
Format Journal Article
LanguageEnglish
Published 2015
Subjects
X射线衍射光谱
原子力显微镜
工艺结构
扫描电子显微镜
蒸发温度
蒸镀
薄膜太阳能电池
薄膜淀积
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Summary:Cu2ZnSnSe4 （CZTSe） thin film solar cells have been fabricated using a one-step co-evaporation technique. The structural properties of polycrystalline CZTSe films deposited at different selenium evaporation temperatures （TSe） have been investigated using X-ray diffraction spectra, scanning electron microscopy, and atomic force microscopy. A relationship between TSe and the secondary phases deposited in the initial stage is established to explain the experimental observations. The Se flux is not necessarily increased too much to reduce Sn loss and the consumption of Se during fabrication could also be reduced. The best solar cell, with an efficiency of 2.32%, was obtained at a medium Tse of 230 ℃ （active area 0.34 cm2）.
Bibliography:Cu2ZnSnSe4; one-step co-evaporation; selenium flux; thin film solar cells; Sn loss
Cu2ZnSnSe4 （CZTSe） thin film solar cells have been fabricated using a one-step co-evaporation technique. The structural properties of polycrystalline CZTSe films deposited at different selenium evaporation temperatures （TSe） have been investigated using X-ray diffraction spectra, scanning electron microscopy, and atomic force microscopy. A relationship between TSe and the secondary phases deposited in the initial stage is established to explain the experimental observations. The Se flux is not necessarily increased too much to reduce Sn loss and the consumption of Se during fabrication could also be reduced. The best solar cell, with an efficiency of 2.32%, was obtained at a medium Tse of 230 ℃ （active area 0.34 cm2）.
11-5781/TN
ISSN:1674-4926