Compositional Dependence Photoluminescence Study of Polycrystalline CuGaSe2 Thin Films

被引：0
|
作者：
Islam, Muhammad Monirul [1 ]
Shibata, Hajime [2 ]
Matsubara, Koji [2 ]
Niki, Shigeru [2 ]
Sakurai, Takeaki [1 ]
Akimoto, Katsuhiro [1 ]
机构：
[1] Univ Tsukuba, Fac Pure & Appl Sci, Div Appl Phys, Tsukuba, Ibaraki 3058573, Japan
[2] Natl Inst Adv Ind Sci & Technol, Res Ctr Photovolta, Tsukuba, Ibaraki 3058568, Japan
来源：
2015 IEEE 42ND PHOTOVOLTAIC SPECIALIST CONFERENCE (PVSC) | 2015年
关键词：
photoluminescence; photovoltaic cells; semiconductor films; thin films; optics;
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：
CuGaSe2 thin films with different Cu/Ga ratio were studied using photoluminescence (PL) method. Measurement at 1.4 K shows asymmetrically broadened PL spectra for all the samples where PL-peaks shift to lower energy with a decrease of the Cu/Ga ratio. Excitation power and temperature dependent PL spectra were explained using donor to acceptor pair transition under the influence of potential fluctuation. Magnitude of the potential fluctuation was calculated from lower energy tail of the emission spectra. Effect of Cu-deficiency on the properties of the CuGaSe2 films and fabricated solar cells were discussed in relation to the potential fluctuation at the band-edge.
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页数：4
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