Influence of selenium evaporation temperature on the structure of Cu_2ZnSnSe_4 thin film deposited by a co-evaporation process  

作　　者：孙顶 许盛之 张力 陈泽 葛阳 王宁 梁雪娇 魏长春 赵颖 张晓丹 

机构地区：[1]Institute of Photo Electronics Thin Film Devices and Technology,Nankai University,Key Laboratory of Photoelectronic Thin Film Devices and Technology

出　　处：《Journal of Semiconductors》2015年第4期74-77,共4页半导体学报（英文版）

基　　金：supported by the Specialized Research Fund for the PhD Program of Higher Education(No.20120031110039)

摘　　要：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）.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）.

关 键 词：Cu2ZnSnSe4 one-step co-evaporation selenium flux thin film solar cells Sn loss 

分 类 号：TM914.4[电气工程—电力电子与电力传动]