Raman analysis of monoclinic Cu2SnS3 thin films

被引:245
|
作者
Berg, Dominik M. [3 ]
Djemour, Rabie [3 ]
Guetay, Levent [3 ]
Siebentritt, Susanne [3 ]
Dale, Phillip J. [3 ]
Fontane, Xavier [1 ]
Izquierdo-Roca, Victor [1 ]
Perez-Rodriguez, Alejandro [1 ,2 ]
机构
[1] Catalonia Inst Energy Res IREC, Barcelona 08930, Spain
[2] Univ Barcelona, Dept Elect, IN2UB, E-08028 Barcelona, Spain
[3] Univ Luxembourg, Lab Photovolta, L-4422 Belvaux, Luxembourg
关键词
CRYSTAL-STRUCTURE;
D O I
10.1063/1.4712623
中图分类号
O59 [应用物理学];
学科分类号
摘要
Secondary phases like Cu2SnS3 are major obstacles for kesterite thin film solar cell applications. We prepare Cu2SnS3 using identical annealing conditions as used for the kesterite films. By x-ray diffraction, the crystal structure of Cu2SnS3 was identified as monoclinic. Polarization-dependent Raman investigations allowed the identification of the dominant peaks at 290 cm(-1) and 352 cm(-1) with the main A' symmetry vibrational modes from the monoclinic Cu2SnS3 phase. Furthermore, micro-resolved Raman investigations revealed local variations in the spectra that are attributed to a secondary phase (possibly Cu2Sn3S7). This exemplifies the abilities of micro-resolved Raman measurements in the detection of secondary phases. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4712623]
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页数:4
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