Photoluminescence properties of Tb3+ and Ce3+ co-doped Sr2MgSi2O7 phosphors for solid-state lighting
来源期刊：Journal of Rare Earths2015年第4期
论文作者：于泓 陈金磊 蒲勇 张铁军 甘树才
文章页码：366 - 370
摘 要：Sr2Mg Si2O7:Tb3+,Ce3+ phosphors were synthesized by solid-state reaction and placed in a muffle furnace in a reducing atmosphere at 1300 oC for 3 h. Photoluminescence properties and energy transfer were investigated. The Ce3+/Tb3+ energy transfer was thoroughly investigated by their emission/excitation spectra and photoluminescence lifetime, there was shortened lifetime of Ce3+（from 51.31 to 50.06 ns） which could support evidence of energy transfer from Ce3+ to Tb3+ in the host. The varied emitted color of Sr1.97–yMg Si2O7:0.03Tb3+,y Ce3+ phosphors could be achieved by altering the concentration of Ce3+, the chromaticity coordinates（x, y） varied from（0.225, 0.376） to（0.172, 0.231）. In Sr1.96 Mg Si2O7:0.03Tb3+,0.01 Ce3+ phosphors, the results indicated that Sr2 Mg Si2O7:Tb3+,Ce3+ might be useful as tunable phosphors for ultraviolet white-light-emitting diodes.
于泓1，陈金磊2，蒲勇1，张铁军1，甘树才2
1. Research Institute for New Materials Technology, Chongqing University of Arts and Sciences2. College of Chemistry, Jilin University
摘 要：Sr2Mg Si2O7:Tb3+,Ce3+ phosphors were synthesized by solid-state reaction and placed in a muffle furnace in a reducing atmosphere at 1300 oC for 3 h. Photoluminescence properties and energy transfer were investigated. The Ce3+/Tb3+ energy transfer was thoroughly investigated by their emission/excitation spectra and photoluminescence lifetime, there was shortened lifetime of Ce3+（from 51.31 to 50.06 ns） which could support evidence of energy transfer from Ce3+ to Tb3+ in the host. The varied emitted color of Sr1.97–yMg Si2O7:0.03Tb3+,y Ce3+ phosphors could be achieved by altering the concentration of Ce3+, the chromaticity coordinates（x, y） varied from（0.225, 0.376） to（0.172, 0.231）. In Sr1.96 Mg Si2O7:0.03Tb3+,0.01 Ce3+ phosphors, the results indicated that Sr2 Mg Si2O7:Tb3+,Ce3+ might be useful as tunable phosphors for ultraviolet white-light-emitting diodes.
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