Low-voltage cathodoluminescence property of Li-doped Gd2-xYxO3:Eu3+

被引:39
作者
Ko, MG
Park, JC
Kim, DK
Byeon, SH [1 ]
机构
[1] Kyung Hee Univ, Inst Natl Sci, Coll Enivronm & Appl Chem, Kyonggi Do 449701, South Korea
[2] Kyungpook Natl Univ, Coll Nat Sci, Dept Chem, Taegu 702701, South Korea
基金
新加坡国家研究基金会;
关键词
cathodoluminescence; phosphor; FED; Gd2-xYxO3 : Eu;
D O I
10.1016/S0022-2313(03)00018-8
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
Cathodoluminescent (CL) spectra of Li-doped Gd2-xYxO3:Eu3+ solid-solution (0.0 less than or equal to x less than or equal to 0.8) were investigated at low voltages (300 V-1 kV). The CL intensity is maximum for the composition of x = 0.2 and gradually reduces with increasing the amount of substituted Y content. In particular, small (similar to100 nm) particles of Li-doped Gd1.8Y0.2O3:Eu3+ are obtained by firing the citrate precursors at only 650degreesC for 18h. Relative red-emission intensity at 300 V of this phosphor is close to 180% in comparison with that of commercial red phosphor Y2O3:Eu3+. An increase of firing temperature to 900degreesC results in 400-600 nm sized spherical particles. At low voltages (300-800 V), the CL emission of 100 nm sized particles is much stronger than that of 400-600 nm sized ones'. In contrast,, the larger particles exhibit the higher CL emission intensity at high voltages (1-10 kV). Taking into consideration, small spherical morphology and effective CL emission, Li-doped Gd1.8Y0.2O3:Eu3+ appears to be an efficient phosphor material for low voltage field emission display. (C) 2003 Elsevier Science B.V. All rights reserved.
引用
收藏
页码:215 / 221
页数:7
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