Na1.88Bi1.88S4和Na1.36Ca1.28Bi1.36S4单晶制备 与结构及其光学性能表征
Na1.88Bi1.88S4 and Na1.36Ca1.28Bi1.36S4 Single Crystals: Growth, Structure and Optical Property
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Na1.88Bi1.88S4和Na1.36Ca1.28Bi1.36S4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Na1.88Bi1.88S4和Na1.36Ca1.28Bi1.36S4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.
Abstract:
Na1.88Bi1.88S4 and Na1.36Ca1.28Bi1.36S4 single crystals of high quality were successfully synthesized by sol-id-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.
作者单位: 上海大学材料科学与工程学院,上海 200444;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 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 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;广东工业大学物理与光电工程学院,广州 510006 上海大学材料科学与工程学院,上海,200444 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 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;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
刊 名 无机材料学报 ISTICEISCIPKU
年,卷(期): 2018, 33(1)
分类号: O782
在线出版日期: 2018年3月6日
基金项目: National Key Research and Development Program,Science and Technology Commission of Shanghai,National Natural Science Foundation of China