国际贸易学硕士
我心永恒英文Enhancement of Eu2+ Luminescence in BaO-SiO2 Compounds Through Composition Modification 期刊名称： Spectroscopy Letters
作者： Y. X. Pan,G. K. Liu
年份： 2011年
少儿游戏大全>google sky期号： 第1期
asmbled关键词： luminescence enhancement;phosphors;silicates;white LEDs
摘要：Phosphors of Eu2+-doped BaO-SiO2 compounds compod of a major BaSiO3 pha and a minor Ba2SiO4 pha were synthesized by a solid-state method at 1200°C under CO atmosphere. An enhancement of the photoluminescence ofmy dream
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Eu2+ up to 18 times has been achieved by mixing ZnO into the composition. The composition-optimized phosphor emits bright yellow–green luminescence with excitation between 380 and 420nm, indicating potential of application in AlGaN-bad UV-LEDs. Under the similar synthesis and measure
luka magnotta脾气不好怎么办ment conditions, the emission band of the optimized phosphor is more inten and has stronger red component than that of Ba2SiO4:Eu2+. Our experimental results suggest that the addition of ZnO may retain and stabilize Eu2+ in BaSiO3 crystalline lattice and thus may enhance the 5d-4f luminescence and eliminate Eu3+ 4f-4f transition.
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