Crystal structure, electronic structure and physical properties of a new semiconducting thallium. antimony selenide:: Tl2.35Sb8.65Se14

被引：4

作者：

Xu, Jianxiao ^{[1
]}

Assoud, Abdeljalil ^{[1
]}

Cui, Yanjie ^{[1
]}

Kleinke, Holger ^{[1
]}

机构：

[1] Univ Waterloo, Dept Chem, Waterloo, ON N2L 3G1, Canada

来源：

SOLID STATE SCIENCES | 2008年 / 10卷 / 09期

基金：

加拿大自然科学与工程研究理事会;

关键词：

thallium; antimony; selenide; crystal structure; electronic structure; semiconductor;

D O I：

10.1016/j.solidstatesciences.2007.12.013

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

A new ternary thallium selenide has been synthesized from the elements in the stoichiometric ratio at 650 degrees C under vacuum. Tl(2.35)Sb(8.65)Se(14) crystallizes in the space group P2(1)/m with a = 17.201(2) angstrom, b = 4.0792(5) angstrom, c = 21.196(3) angstrom, beta = 109.303(3)degrees, V = 1403.6(3) angstrom(3). The structure is composed of distorted edge-sharing SbSe(6) octahedra, while the Tl atoms are coordinated by 8-9 Se atoms. The title compound is a black semiconductor in accord with the electronic structure calculation. Transport property measurements confirm that this compound is an n-type semiconductor with an electrical conductivity of sigma = 3.9 x 10(-40) Omega(-1) cm(-1) and a Seebeck coefficient of S = -452 mu V K(-1) at 300 K. The optical band gap was determined via spectroscopy to be 0.6 eV. (C) 2007 Elsevier Masson SAS. All rights reserved.

引用

页码：1159 / 1165

页数：7

共 20 条

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