Effect of fluxes on structure and luminescence properties of Y3Al5O12:Ce3+ phosphors
来源期刊：JOURNAL OF RARE EARTHS2009年第2期
论文作者：WANG Huanping DENG Degang JU Haidong ZHANG Ying XU Shiqing WANG Baoling SUN Liuzheng ZHAO Shilong
Key words：yttrium aluminum garnet (YAG); phosphors; white light emitting diodes (WLED); fluxes; alkali fluoride; rare earths;
Abstract: Ce3+-activated yttrium aluminum garnet (YAG) was prepared by the solid-state reaction, in which H3BO3, LiF, NaF, KF and BaF2 were used as the fluxes. The effect of fluxes on optical properties of phosphors was studied in detail, especially the fluxes of alkali fluorides, which could enhance the emission intensity and change the wavelength of emission peaks. Among these YAG:Ce phosphors, the phosphor sintered with H3BO3 and NaF exhibited the strongest emission. The emission peaks of phosphors prepared with fluxes from LiF to KF were shifted to long wavelength. The effect of NaF concentration on the emission intensity of YAG:Ce was also investigated. The value of emis-sion intensity reached the maximum when the concentration of NaF was 0.5%.
WANG Huanping1，DENG Degang1，JU Haidong1，ZHANG Ying1，XU Shiqing1，WANG Baoling1，SUN Liuzheng1，ZHAO Shilong1
(1.College of Materials Science and Engineering,China Jiliang University,Hangzhou 310018,China)
Abstract:Ce3+-activated yttrium aluminum garnet (YAG) was prepared by the solid-state reaction, in which H3BO3, LiF, NaF, KF and BaF2 were used as the fluxes. The effect of fluxes on optical properties of phosphors was studied in detail, especially the fluxes of alkali fluorides, which could enhance the emission intensity and change the wavelength of emission peaks. Among these YAG:Ce phosphors, the phosphor sintered with H3BO3 and NaF exhibited the strongest emission. The emission peaks of phosphors prepared with fluxes from LiF to KF were shifted to long wavelength. The effect of NaF concentration on the emission intensity of YAG:Ce was also investigated. The value of emis-sion intensity reached the maximum when the concentration of NaF was 0.5%.
Key words:yttrium aluminum garnet (YAG); phosphors; white light emitting diodes (WLED); fluxes; alkali fluoride; rare earths;
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