Na_(1.88)Bi_(1.88)S_4和Na_(1.36)Ca_(1.28)Bi_(1.36)S_4单晶制备与结构及其光学性能表征(英文)  

Na_(1.88)Bi_(1.88)S_4 and Na_(1.36)Ca_(1.28)Bi_(1.36)S_4 Single Crystals: Growth,Structure and Optical Property

作　　者：王东[1,2] 贺剑桥[2] 赖晓芳 黄荣铁 施鹰 徐丽[5] 黄富强 

机构地区：[1]上海大学材料科学与工程学院,上海200444 [2]中国科学院上海硅酸盐研究所,高性能陶瓷和超微结构国家重点实验室,上海200050 [3]北京大学化学与分子工程学院,北京分子科学国家实验室,稀土材料化学及应用国家重点实验室,北京100871 [4]广东工业大学物理与光电工程学院,广州510006 [5]全球能源互联网研究院,先进输电技术国家重点实验室,电工新材料技术联合实验室,北京102209

出　　处：《无机材料学报》2018年第1期100-106,共7页Journal of Inorganic Materials

基　　金：National Key Research and Development Program(2016YFB0901600); Science and Technology Commission of Shanghai(16JC1401700); National Natural Science Foundation of China(11404358,51402335)

摘　　要：采用碘化钠为助熔剂,通过固相反应法制备了两种晶体质量较好的Na_(1.88)Bi_(1.88)S_4和Na_(1.36)Ca_(1.28)Bi_(1.36)S_4单晶。测试结果表明,它们属于氯化钠结构,面心立方,空间群为Fm-3m。形貌表征和物性测试结果表明,在碘化钠的作用下,化合物Na_(1.88)Bi_(1.88)S_4和Na_(1.36)Ca_(1.28)Bi_(1.36)S_4呈现双锥状形貌,沿(111)晶面择优取向生长,带隙分别为1.29和1.45 eV。通过光电器件性能测试,发现两种化合物均表现出良好的光电响应特性,说明它们可以作为一类潜在的、性能优良的光电开关材料。Na1.88Bi1.88S4 and Na1.36Ca1.28Bi1.36S4 single crystals of high quality were successfully synthesized by solid-state reaction method using NaI as flux. Both compounds crystallize in the rocksalt structure type of a cubic Fm-3m space group. The preferred orientation growth of lattice face （111） were observed in both two compounds. The optical absorption measurements show that the band gap of Na1.88Bi1.88S4 and Na1.36Ca1.28Bi1.36S4 compounds are 1.29 eV and 1.45 eV, respectively. Two compounds were fabricated into devices that exhibit notable photoelectric behavior, suggesting their potential for applications as photoelectric switches.

关 键 词：单晶生长 Na1.88Bi1.88S4 Na1.36Ca1.28Bi1.36S4 半导体材料 

分 类 号：O782[理学—晶体学]