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	Structure transition and enhanced photoluminescence of Gd2-xYxO3 : Eu nanocrystals
	Sun, LD ; Liao, CS ; Yan, CH
	2003
关键词	photoluminescence nanocrystals structure transition cubic and monoclinic phase Gd2O3 : Eu OPTICAL-PROPERTIES PHOSPHORS
英文摘要	The influence of Y doping on the crystallization behavior, structure transition and the photoluminescence enhancement of Gd2O3:Eu (Eu3+ doping concentration is kept as 10%) nanocrystals prepared by combustion method was investigated. The as-prepared Gd2O3: Eu was in monoclinic phase. As x increased to 0. 14, cubic phase could be observed as well as monoclinic, and heavy Y doping (x > 0.40) changed the structure to cubic instead of monoclinic. Though it was prominent that cubic Y2O3:Eu, as the extreme case of Y substitution, had much stronger photoluminescence than monoclinic Gd2O3:Eu in a same Eu3+-doping concentration, it is quite surprising that less Y doping increased the emission of monoclinic Gd2O3:Eu. This effect can be ascribed to the crystal field difference induced by lattice distortion, which is a much more significant behavior for the nanocrystals than the bulk. (C) 2003 Elsevier Science (USA). All rights reserved.; Chemistry, Inorganic & Nuclear; Chemistry, Physical; SCI(E); EI; CPCI-S(ISTP); 40
语种	英语
DOI标识	10.1016/S0022-4596(02)00182-2
内容类型	其他
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/256077]
专题	化学与分子工程学院
推荐引用方式 GB/T 7714	Sun, LD,Liao, CS,Yan, CH. Structure transition and enhanced photoluminescence of Gd2-xYxO3 : Eu nanocrystals. 2003-01-01.

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