Micro-Raman/PL and Micro-LBIC Studies of CZTSe Materials and PV Devices

被引：0
|
作者：
Chen, Qiong [1 ]
Yue, Naili [1 ]
Zhang, Yong [1 ]
机构：
[1] Univ N Carolina, Energy Prod & Infrastruct Ctr, Dept Elect & Comp Engn, Charlotte, NC 28223 USA
来源：
2013 IEEE 39TH PHOTOVOLTAIC SPECIALISTS CONFERENCE (PVSC) | 2013年
关键词：
CZTSe; CdS; thin film; solar cell; LBIC Micro-Raman; cleaved edge;
D O I：
暂无
中图分类号：
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号：
0807 ; 0820 ;
摘要：
Micro-Raman/PL/LBIC (Laser Beam Induced Current) was applied to investigate the homogeneity of polycrystalline Cu2ZnSnSe4 (CZTSe) thin-films from both front surface and cleaved edge with sub-micron spatial resolution. By comparing the materials before and after CdS coating, we have investigated the effect of non-uniformity of CdS layer on the spatial variation of the photo-response, correlating to the, mu-Raman/PL probes. The CdS induced spatial variation is found to be a source of inhomogeneity in addition to that of the absorber layer itself. The devices investigated typically have > 8.5% efficiency. The contrast of the LBIC signal adjacent to the CdS rich area is found to depend on excitation laser power, indicating a potential for further efficiency improvement. Cleaved edge Raman probe has revealed possible variation in the compositions along the growth direction.
引用
收藏
页码：2567 / 2571
页数：5
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