Sr_3B_2O_6∶Tb^(3+),Li^+绿色荧光粉的发光特性(英文)

Luminescent Properties of Sr_3B_2O_6∶Tb^(3+),Li^+ Green Phosphor

用高温固相法合成了Sr3B2O6∶Tb3+,Li+绿色荧光粉,并研究粉体的发光性质。发射光谱由位于黄绿区的4个主要荧光发射峰组成,峰值分别位于495,548,598,625nm,对应了Tb3+的5D4→7F6,5D4→7F5,5D4→7F4和5D4→7F3特征跃迁发射,548nm的发射最强。激发光谱表现从200~400nm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350~410nm辐射有效激发。研究了Tb3+掺杂和电荷补偿剂对样品发光亮度的影响。Sr3B2O6∶Tb3+,Li+是一种适用于白光LED的绿色荧光粉。

tion and its 1 The Sr3 B2O6 ： Tb^3＋ , Li^＋ green phosphor was synthesized by the general high temperature solid-state reacproperties were investigated. It shows four major emission peaks locating at 495,548,598 and 625 nm corresponding to the ^5D4→^7F6,^5D4→^7F5,^5D4→^7 and ^5D4→^7F3 typical transitions of Tb^3＋ , respectively, and the strongest one appears at 548 nm. The excitation spectrum contains a broad band extending from 200 nm to 400 nm, which is coupled well with the emission of ultraviolet light-emitting diodes （UVLEDs）. The influences of doped-Th^3＋ concentration and charge compensation of Li^＋ on the emission intensity were also investigated. The Sr3 B2O6： Tb^3＋ is a kind of potential green-emitting phosphor for white light emitting diode （w-LED）.