期刊
OPTICAL MATERIALS
卷 34, 期 8, 页码 1362-1365出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.optmat.2012.02.028
关键词
Semiconductors; Optical properties; Optical spectroscopy
资金
- National Science Council of Taiwan [NSC 100-2112-M-011-001-MY3, NSC 100-2811-M-011-001]
- STCU [5402]
- IRSES PVICOKEST [269167]
Single crystals of Cu2ZnSn(SxSe1-x)(4) (CZTSSe) solid solutions were grown by chemical vapor transport technique using iodine trichloride as a transport agent. As confirmed by X-ray investigations, the as-grown CZTSSe solid solutions are single phase and crystallized in kesterite structure. The lattice parameters of CZTSSe were determined and the S contents of the obtained crystals were estimated by Vegard's law. The composition dependent band gaps of CZTSSe solid solutions were studied by electrolyte electroreflectance (EER) measurements at room temperature. From a detailed lineshape fit of the EER spectra, the band gaps of CZTSSe were determined accurately and were found to decrease almost linearly with the increase of Se content, which agreed well with the recent theoretical first-principle calculations by S. Chen, A. Walsh, J.H. Yang, X.G. Gong, L Sun, P. X. Yang, J.H. Chu, S.H. Wei, Phys. Rev. B 83 (2011) 125201 (5pp). (C) 2012 Elsevier B.V. All rights reserved.
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