Luminescent properties of red phosphors K2Ba（MoO4）2:Eu3+ for white light emitting diodes
来源期刊：JOURNAL OF RARE EARTHS2012年第10期
论文作者：李兆梅 钟迎娟 高绍康
文章页码：990 - 994
摘 要：K2Ba（MoO4）2:Eu3+ phosphors were synthesized by solid-state reaction. The emission and excitation spectra of K2 Ba（MoO4）2:Eu3+ phosphors exhibited that the phosphors could be effectively excited by near ultraviolet （394 nm） and blue （465 nm） light, and emitted red light at 616 nm. The influence of Eu3+concentration, sintering temperature and charge compensators （K+, Na+ or Li+ ） on the emission intensity were investigated. The results indicated that concentration quenching of Eu3+ was not observed within 30mol.% Eu 3+, 600 oC was a suitable sintering temperature for preparation of K2 Ba（MoO4）2:Eu3+phosphors, and K+ ions gave the best improvement to enhance the emission intensity. The CIE chromaticity coordinates of K2 Ba（MoO4）2:0.05Eu3+phosphor were calculated to be （0.68, 0.32）, and color purity was 97.4%.
李兆梅，钟迎娟，高绍康
College of Chemistry and Chemical Engineering, Fuzhou University
摘 要：K2Ba（MoO4）2:Eu3+ phosphors were synthesized by solid-state reaction. The emission and excitation spectra of K2 Ba（MoO4）2:Eu3+ phosphors exhibited that the phosphors could be effectively excited by near ultraviolet （394 nm） and blue （465 nm） light, and emitted red light at 616 nm. The influence of Eu3+concentration, sintering temperature and charge compensators （K+, Na+ or Li+ ） on the emission intensity were investigated. The results indicated that concentration quenching of Eu3+ was not observed within 30mol.% Eu 3+, 600 oC was a suitable sintering temperature for preparation of K2 Ba（MoO4）2:Eu3+phosphors, and K+ ions gave the best improvement to enhance the emission intensity. The CIE chromaticity coordinates of K2 Ba（MoO4）2:0.05Eu3+phosphor were calculated to be （0.68, 0.32）, and color purity was 97.4%.
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