Structural and optical properties of (Cu6PS5Br)1-x(Cu7PS6)x mixed crystals

被引：9
作者：
Studenyak, I. P. [1 ]
Luchynets, M. M. [1 ]
Izai, V. Yu [1 ]
Pogodin, A., I [1 ]
Kokhan, O. P. [1 ]
Azhniuk, Yu M. [1 ,2 ]
Zahn, D. R. T. [3 ]
机构：
[1] Uzhgorod Natl Univ, 46 Pidhirna Str, UA-88000 Uzhgorod, Ukraine
[2] Ukr Nat Acad Sci, Inst Electron Phys, Uzhgorod, Ukraine
[3] Tech Univ Chemnitz, Semicond Phys, D-09107 Chemnitz, Germany
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 2019年 / 782卷
关键词：
Inorganic materials; Crystal growth; Crystal structure; X-ray diffraction; Raman scattering; Diffuse reflection; EXCITON-PHONON INTERACTION; ABSORPTION-EDGE; ELECTRICAL-PROPERTIES; RAMAN-SCATTERING; PHASE-TRANSITION; LI6PS5X X; BR; ARGYRODITES; CL; CONDUCTIVITY;
D O I：
10.1016/j.jallcom.2018.12.214
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The structure and optical properties of Bridgman-grown (Cu6PS5Br)(1-x)(Cu7PS6)(x) mixed crystals are reported. X-ray diffraction data reveal a face-centred cubic lattice (F (4) over bar 3m space group) for Cu6PS5Br-rich crystals (0 < x < 0.4) and a primitive cubic lattice (P2(1)3 space group) for Cu6PS5-rich (0.4 < x < 1) crystals. These structural data correlate with the Raman spectra where, besides the common features typical for the argyrodite-type Cu6PS5Br and Cu6PS5Br crystals, weaker bands characteristic only for the end-point compounds are observed in the corresponding compositional intervals. Based on the spectral position of the short-wavelength edge of diffuse reflection spectra, the compositional dependence of the energy gap is studied exhibiting a nonlinear behaviour. (C) 2018 Elsevier B.V. All rights reserved.
引用
收藏
页码：586 / 591
页数：6
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