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Crystallographic and optical properties of CuInS 2 ‐Cu 2 ZnSnS 4 crystals
Author(s) -
Oishi Koichiro,
Shimizu Wataru,
Takeuchi Akiko,
Nishida Genki,
Yamazaki Makoto,
Nakagawa Masato,
Aoyagi Naritoshi,
Katagiri Hironori
Publication year - 2017
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.201700112
Subject(s) - lattice constant , raman spectroscopy , crystallography , materials science , crystal structure , diffraction , phase (matter) , rietveld refinement , lattice (music) , analytical chemistry (journal) , chemistry , optics , physics , organic chemistry , chromatography , acoustics
CuInS 2 ‐Cu 2 ZnSnS 4 crystals were synthesized by the pressure‐less sintering method using CuInS 2 and Cu 2 ZnSnS 4 powders grown from each melt. The x values in Cu 2 (2In) x (ZnSn) (1.00− x ) S 4 were evaluated by energy dispersive spectroscopy. Lattice constants were derived from powder X‐ray diffraction analysis by Rietveld method. Lattice constants of CuInS 2 phase changed linearly at x ≥ 0.49. On the other hand, lattice constants of Cu 2 ZnSnS 4 phase changed almost linearly at x ≤ 0.37. In Raman spectra, peak positions of A ( I 4 ¯) or A 1 ( I 4 ¯ 2 m ) mode of Cu 2 ZnSnS 4 phase changed toward the lower wavenumber side linearly with increasing x . A 1 mode of CuInS 2 phase became weaker with decreasing x , and disappeared below x = 0.49. In PL spectra measured at 15 K, broad peaks at about 1.26 eV were observed at 0.00 ≤ x ≤ 0.85.