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

页码：586 / 591

页数：6

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