Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 511, Issue 1, Pages 129-132Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2011.08.099
Keywords
Cu2ZnSn(S,Se)(4); X-ray diffraction (XRD); Raman spectroscopy; Optical absorption; Solid solutions
Categories
Funding
- specialized Research Fund for the Doctoral Program of Higher Education of China [20100076120009]
- Science and Technology Commission of Shanghai Municipality [11ZR1411400, 10DJ1400200, 10JC1404600]
- National Natural Science Foundation of China [10874127, 60990312, 61076060]
- PCSIRT in University
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The evolution of structure and optical properties of Cu2ZnSn (SxSe1-x)(4) (CZTSSe) solid solutions in a wide composition range (0 <= x <= 1) has not been fully elucidated. We have performed comprehensive characterization on the CZTSSe powders with different S/Se ratios, which were synthesized by the solid state reaction method. X-ray diffraction patterns demonstrate that the lattice parameters a and c of CZTSSe decrease lineally when S replace Se gradually, which obeys the Vegard's rule. The A(1) Raman modes of CZTSSe show a typical two-mode behavior. The absorption spectra reveal that the band gap of CZTSSe can be tuned monotonously between 0.96 and 1.5 eV with almost linearity, and a small band gap bowing constant (b approximate to 0.08 eV) is deduced. (C) 2011 Elsevier B. V. All rights reserved.
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