Liu Chong, Guan Li, Zhang Hao, Li Pan-lai, Guo Qing-lin, Yang Zhi-ping, Fu Guang-sheng
College of Physics Science and Technology, Hebei University, Baoding 071002, China.
Guang Pu Xue Yu Guang Pu Fen Xi. 2012 Apr;32(4):1016-9.
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.
采用高温固相法合成了一种用于紫外激发白光发光二极管的蓝绿色Ca7(SiO4)2Cl6:Eu2+荧光粉。研究了其X射线衍射图谱和发光性能。结果表明，样品为单一的Ca7(SiO4)2Cl6相；发射光谱包括分别位于418和502nm处的两个发射峰。监测这两个发射峰，激发光谱分别是以290和360nm为中心的两个宽带峰，这表明Eu2+离子位于两个不同的晶格位置。研究了Eu2+离子浓度对发光强度的影响，最佳掺杂浓度为0.75mol%。结果表明，该荧光粉是一种较好的用于紫外基白光发光二极管的蓝色荧光粉候选材料。
