期刊
MATERIALS LETTERS
卷 202, 期 -, 页码 70-72出版社
ELSEVIER
DOI: 10.1016/j.matlet.2017.05.069
关键词
Cu2ZnSnS4; Cu2ZnSnSe4; Kesterite; Cu2S; SnS; Band gap; Hybrid functional
资金
- Research Council of Norway through the New Indigo project [237643/E20]
- [nn4608k]
We have studied influence of Cu2ZnSnSe4 (CZTSe) and secondary phases of Cu2S and SnS on optical properties of kesterite-type Cu2ZnSnS4 (CZTS) by using the effective medium theory. We found that CZTSe and Cu2S cause band gap reduction and enhance light absorption of CZTS at all photon energies of the sunlight whereas SnS changes optical properties of CZTS only at large photon energies beyond the solar spectrum. Optical spectra of CZTS(Se) has been studied by first principles calculations within hybrid functional that was used as input for the effective medium theory. (C) 2017 Elsevier B.V. All rights reserved.
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