Study on the Spectral Properties of Ca7(SiO4)2Cl6 Phosphor for White LED
LIU Chong1, GUAN Li1,2*, ZHANG Hao1, LI Pan-lai1, GUO Qing-lin1,2, YANG Zhi-ping1,2, FU Guang-sheng1,2
1. College of Physics Science and Technology, Hebei University, Baoding 071002, China 2. Hebei Key Laboratory of Optoelectronic Information Materials, Hebei University, Baoding 071002, China
Abstract：A bluish green Ca7(SiO4)2Cl6∶Eu2+ phosphor used for UV excited white LED was synthesized by high temperature solid state method. The XRD patterns and luminescence properties were investigated. The results indicated that the sample was single Ca7(SiO4)2Cl6 phase; the emission spectrum included two emission peaks located at 418 and 502 nm, respectively. Monitoring for the two emission peaks, the excitation spectra were two broad band peaks centered at 290 and 360 nm respectively, which illustrated that Eu2+ ions located at two different crystal lattice sites. The influence of Eu2+ ions concentration on the luminescence intensity was studied and the optimal doping concentration was 0.75 mol%. The results showed that this phosphor was a better candidate bluish phosphor for UV based white LED.
Key words：High temperature solid state method;Ca7(SiO4)2Cl6∶Eu2+;Spectral properties;Doping concentration
刘 冲1，关 丽1,2*，张 浩1，李盼来1，郭庆林1，2，杨志平1,2，傅广生1,2 . 白光LED用Ca7(SiO4)2Cl6∶Eu2+荧光粉的光谱性能研究 [J]. 光谱学与光谱分析, 2012, 32(04): 1016-1019.
LIU Chong1, GUAN Li1,2*, ZHANG Hao1, LI Pan-lai1, GUO Qing-lin1,2, YANG Zhi-ping1,2, FU Guang-sheng1,2 . Study on the Spectral Properties of Ca7(SiO4)2Cl6 Phosphor for White LED . SPECTROSCOPY AND SPECTRAL ANALYSIS, 2012, 32(04): 1016-1019.
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