Sol-gel processing of BaMgF4-Eu2+ thin films and their violet luminescence

被引：27

作者：

Fujihara, S ^{[1
]}

Kishiki, Y ^{[1
]}

Kimura, T ^{[1
]}

机构：

[1] Keio Univ, Fac Sci & Technol, Dept Appl Chem, Kohoku Ku, Yokohama, Kanagawa 2238522, Japan

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2002年 / 333卷 / 1-2期

关键词：

phosphors; thin films; chemical synthesis; luminescence;

D O I：

10.1016/S0925-8388(01)01696-6

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

BaMgF4-Eu2+ thin films were prepared from trifluoroacetate precursor solutions by a sol-gel method and their violet luminescence was investigated. A (Ba,Eu)MgF4 phase was obtained by heating the spin-coated precursor films at temperatures of 550-650degreesC. The reduction of Eu3+, which originated from Eu(CH3COO)(3).4H(2)O in the precursor, to Eu2+ in the heat-treated films was evidenced by the strong, broadband 4f-5d excitation at 290 run and emission at 420 nm in photoluminescence measurements. The intensity of violet luminescence of Eu2+ depended on the heating temperature, heating time and the Eu concentration. The strongest violet emission was observed with the BaMgF4-Eu (15 mol%) film that was heated at 650degreesC for 10 min under the present experimental conditions. (C) 2002 Elsevier Science B.V. All rights reserved.

引用

页码：76 / 80

页数：5

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