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用高温固相法合成了Sr2SiO4:Sm3+红色荧光粉,并研究粉体的发光性质。发射光谱由位于红橙区的3个主要荧光发射峰组成,峰值分别位于 570,606nm和653nm,对应了Sm3+的4G5/2→6H5/2,4G5/2→6H7/2和4G5/2→6H9/2特征跃迁发射,606nm的发射最强。激发光谱表现从350nm到420nm的宽带,可以被近紫外光辐射二极管(near-ultraviolet light-emitting diodes, UVLED)管芯产生的350～410 nm辐射有效激发。研究了 Sm3+掺杂和不同电荷补偿剂对样品发光亮度的影响,Sm3+掺杂摩尔分数为6%、电荷补偿剂为Cl–时的效果最好。Sr2SiO4:Sm3+是一种适用于白光LED的红色荧光粉。
The Sr2SiO4: Sm3 + red phosphor was synthesized by solid state reaction at high temperature and the luminescent properties of the phosphor were investigated. The emission spectra consist of three major fluorescence emission peaks located in the red-orange region at 570, 606nm and 653nm, respectively, corresponding to the Sm5 + 4G5 / 2 → 6H5 / 2,4G5 / 2 → 6H7 / 2 and 4G5 / 2 → 6H9 / 2 characteristic transition emission, 606nm emission strongest. The excitation spectrum exhibits broadband from 350 nm to 420 nm and can be efficiently excited by 350-410 nm radiation from near-ultraviolet light-emitting diodes (UVLEDs). The effects of Sm3 + doping and different charge compensation agents on the luminescence intensity of the samples were studied. The results showed that the Sm3 + doping molar fraction was 6% and the charge compensation agent was Cl-. Sr2SiO4: Sm3 + is a red phosphor suitable for white LEDs.