Investigation on morphology and broadband blue-white emission modification of La1–xBixOCl polycrystals
来源期刊：JOURNAL OF RARE EARTHS2017年第1期
论文作者：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
文章页码：53 - 57
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.
胡锐1，周玉婷1，宋志国1，李永进1,2，刘群1，徐祖元1，邝庆亮1，张庆福1，邱建备1，杨正文1
1. School of Materials Science and Engineering,Kunming University of Science and Technology2. Department of Science Research,Yunnan Technology and Business University
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.
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