Optimized photoluminescence of SrB2O4:Eu3+ red-emitting phosphor by charge compensation.

A novel red-emitting phosphor, SrB(2)O(4):Eu(3+), was synthesized by high temperature solid-state reaction and its photoluminescence properties were studied. The emission spectrum consists of four major emission bands. The emission peaks are located at 593, 612, 650 and 703nm, corresponding to the (5)D(0)→(7)F(1), (5)D(0)→(7)F(2), (5)D(0)→(7)F(3) and (5)D(0)→(7)F(4) typical transitions of Eu(3+), respectively. The effects of Eu(3+) doping content and charge compensators (Li(+), Na(+), K(+)) on photoluminescence of SrB(2)O(4):Eu(3+) phosphor were studied. The results show that the emission intensity can be affected by above factors and Na(+) is the optimal charge compensator for SrB(2)O(4):Eu(3+). The photoluminescence of NaSrB(2)O(4):Eu(3+) was compared with that of Y(2)O(2)S:Eu(3+). It implies that SrB(2)O(4):Eu(3+) is a good candidate as a red-emitting phosphor pumped by near-ultraviolet (NUV) InGaN chip for fabricating white light-emitting diodes (WLEDs).