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Blue-Green-Emitting Phosphor CaSc[sub 2]O[sub 4]:Tb[sup 3+]: Tunable Luminescence Manipulated by Cross-Relaxation

2009; Institute of Physics; Volume: 156; Issue: 3 Linguagem: Inglês

10.1149/1.3060382

1945-7111

Zhendong Hao, Jiahua Zhang, Xia Zhang, Shaozhe Lü, Xiaojun Wang,

Luminescence and Fluorescent Materials

Blue-green phosphors have been prepared by solid-state reaction. Under 254 or light excitation, both blue and green emissions are observed, which are attributed to the characteristic 4f-4f transitions (, ) of . The cross-relaxation from to states are investigated by spectroscopic and dynamic measurements. The luminescent color of can be tuned from blue to green by manipulating the cross-relaxation. Moreover, efficient white light is generated for fluorescence lamps by blending the blue-green with a red phosphor.