移动区熔法生长全无机钙钛矿型CsPbBr_3晶体及其性能研究（英文）  

Growth and Characterization of All-inorganic Perovskite CsPbBr_3 Crystal by a Traveling Zone Melting Method

作　　者：徐家跃 梁肖肖 金敏 曾海波 KIMURA Hideo 胡皓阳 邵和助 申慧 田甜 李海霞 XU Jia-Yue;LIANG Xiao-Xiao;JIN Min;ZENG Hai-Bo;KIMURA Hideo;HU Hao-Yang;SHAO He-Zhu;SHEN Hui;TIAN Tian;LI Hai-Xia(Institute of Crystal Growth,School of Materials Science and Engineering,Shanghai Institute of Technology,Shanghai 201418,China;College of Materials,Shanghai Dianji University,Shanghai 201306,China;Institute of Optoelectronics and Nanomaterials,College of Materials Science and Engineering,Nanjing University of Science and Technology,Nanjing 210094,China;National Institute for Materials Science,1-2-1 Sengen,Tsukuba,Ibaraki 305-0047,Japan)

机构地区：[1]上海应用技术大学材料科学与工程学院晶体生长研究所,上海201418 [2]上海电机学院材料学院,上海201306 [3]南京理工大学材料科学与工程学院纳米光电材料研究所,南京210094 [4]National Institute for Materials Science,1-2-1 Sengen,Tsukuba,Ibaraki 305-0047,Japan

出　　处：《无机材料学报》2018年第11期1253-1258,共6页Journal of Inorganic Materials

基　　金：National Natural Science Foundation of China(51472263,51572175,61605116);Ningbo Natural Science Foundation(2017A610009);Public Projects of Zhejiang Province(2017C31006);Shanghai Natural Science Foundation(15ZR1440600)

摘　　要：利用自制移动区熔炉生长了CsPbBr_3晶体,事先采用相同工艺合成了高纯多晶原料以去除杂质和水分。通过工艺优化获得了大尺寸CsPbBr_3晶体,达到Ф25 mm×60 mm。该晶体呈橘红色,在600～2000 nm波长范围内具有透过率达78.6%的优异透光性能。热分析表明,所得CsPbBr_3晶体在88.1℃和131.25℃时存在正交-四方和四方-立方相变。计算得到CsPbBr_3晶体的带宽E_g=2.25eV。上述结果表明移动区熔法是一种具有应用潜力的制备高质量大尺寸CsPbBr_3晶体的生长方法。A self-designed traveling zone melting method was employed to fabricate perovskite CsPbBr3 crystals, which is helpful for impurities removing and moisture excluding. A large-size CsPbBr3 crystal with a dimension of Ф25 mm× 60 mm is successfully obtained. The as-grown crystal shows orange color and displays an excellent transmittance of 78.6% in the range of 600 nm-2000 nm wavelength. It is revealed by DSC analysis that there is phase transition at 88.1℃ and 131.25℃, respectively. The band gap Eg of the crystal is calculated to be 2.25 eV. The above results prove that the traveling zone melting method is indeed a potential approach for large size and high quality CsPbBr3 crystal preparation.

关 键 词：移动区熔法 CsPbBr3晶体 透过率 带隙 

分 类 号：TQ174[化学工程—陶瓷工业]