Photoluminescence properties of stoichiometric CuInSe2 crystals

被引：20
作者：
Krustok, J [1 ]
Jagomägi, A [1 ]
Raudoja, J [1 ]
Altosaar, M [1 ]
机构：
[1] Tallinn Univ Technol, Inst Mat Technol, EE-19086 Tallinn, Estonia
来源：
SOLAR ENERGY MATERIALS AND SOLAR CELLS | 2003年 / 79卷 / 03期
关键词：
CuInSe2; Photoluminescence; solid solution;
D O I：
10.1016/S0927-0248(03)00018-7
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：
We studied photoluminescence (PL) properties of stoichiometric CuInSe2 (CIS) single microcrystals. Temperature and laser power dependencies of the PL spectra were measured. Two bands at 0.973 (A-band) and 0.991 eV (B-band) governed the obtained PL spectra. Measured dependencies showed very similar properties for both bands: the j-shift that was generated by altering the laser power was 2 meV per decade for both bands and thermal activation energies were 46 and 32 meV for A- and B-band, respectively. Based on these results, we assume that both bands come from the same shallow donor-shallow acceptor recombination process with different bandgap energies for CIS. The solid solution phase of CIS with K or Na is proposed as the source of distinctive bandgap. (C) 2003 Elsevier Science B.V. All rights reserved.
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页码：401 / 408
页数：8
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