Investigation on morphology and broadband blue-white emission modification of La_(1–x)Bi_xOCl polycrystals

作     者：HU Rui ZHOU Yuting SONG Zhiguo LI Yongjin LIU Qun XU Zuyuan KUANG Qingliang ZHANG Qingfu QIU Jianbei YANG Zhengwen 胡锐;周玉婷;宋志国;李永进;刘群;徐祖元;邝庆亮;张庆福;邱建备;杨正文

作者机构：School of Materials Science and Engineering Kunming University of Science and Technology Kunming 650093 China Department of Science Research Yunnan Technology and Business University Kunming 651700 China 

出 版 物：《Journal of Rare Earths》 (稀土学报（英文版）)

年 卷 期：2017年第35卷第1期

页      面：53-57页

核心收录：

学科分类：0709[理学-地质学] 0819[工学-矿业工程] 081704[工学-应用化学] 07[理学] 08[工学] 0817[工学-化学工程与技术] 0708[理学-地球物理学] 0703[理学-化学] 070301[理学-无机化学] 0803[工学-光学工程] 

基　　金：Project supported by the National Natural Science Foundation of China(61465006,61265007) Reserve Talents Project of Yunnan Province(2015HB013) 

主　　题：La1–xBixOCl host luminescence self-doping layered structure rare earths 

摘      要：Tetragonal structure La1-xBixOCl polycrystals were prepared by solid state synthesis. With increase in bismuth content, the morphology of the prepared samples changed from non-oriented particles to layered crystals and the broadband blue-white emission from LaOCl polycrystals decreased dramatically. Comparative experiments and X-ray photoelectron spectroscopy（XPS） analysis indicated that the host emission more possibly originated from Cl self-doping in oxychloride crystals. According to a close composition relationship of the Cl self-doping behavior and crystal morphology, it was suggested that the La composition strengthened the interlayer interaction between Cl^– anion and crystal cell lamellar, hindering the orientation of LaOCl crystals. The results of our work would deepen the understanding of the orientation structure of tetragonal oxyhalides and offer an insight into the origin of its host luminescence.