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	Study of the optical properties of Eu3+-doped ZnS nanocrystals
	Sun, LD ; Yan, CH ; Liu, CH ; Liao, CS ; Li, D ; Yu, JQ
	1998
关键词	colloid growth and aging processes surface states ZnS nanocrystals
英文摘要	Absorption and photoluminescence excitation spectra are presented for ZnS:Eu nanocrystals. The average size of the ZnS:Eu nanocrystals was about 3.6 nm deduced from the absorption spectra and was independent of the doping concentration of Eu3+. The characteristic luminescence from the D-5(0)-F-7(J) (J=0, 1, 2) transition of Eu3+ was observed. This is attributed to the electrons and holes being localized around Eu3+, and the possibility of energy transfer from band to band excitation in ZnS to trivalent rare earth Eu3+ is increased. The location of Eu3+ is different for different doping concentrations deduced from the relative luminescence intensity. Three main types of Eu3+ ion exist in the colloid. The samples undergo growth and aging processes according to the variation of the luminescence intensity after preparation. A tentative explanation is given that the location of the Eu3+ ions and the surface states may play important roles. (C) 1998 Elsevier Science S.A.; Chemistry, Physical; Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering; SCI(E); EI; CPCI-S(ISTP); 31
语种	英语
DOI标识	10.1016/S0925-8388(98)00310-7
内容类型	其他
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/216571]
专题	化学与分子工程学院
推荐引用方式 GB/T 7714	Sun, LD,Yan, CH,Liu, CH,et al. Study of the optical properties of Eu3+-doped ZnS nanocrystals. 1998-01-01.

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