화학공학소재연구정보센터
Journal of the American Ceramic Society, Vol.102, No.6, 3517-3524, 2019
A novel Li2CaSi2N4:Eu2+ orange-red phosphor for field-emission displays
The exploration of suitable phosphors with high efficiency, low saturation, and good stability has always been a key issue for field-emission displays (FEDs) development. In this work, a novel Li2CaSi2N4:Eu2+ orange-red phosphors were prepared by solid reaction process and the cathodoluminescence (CL) properties were investigated in detail to explore the potential application for FEDs. Under a low voltage electron-beam excitation, the phosphors show an intense orange-yellow emission in the range of 500-700 nm, which belongs to the 4f(6)5d4f(7) electron transition of Eu2+ ion. The influences of the Eu2+ doping concentration, filament current, accelerating voltage, and bombardment time on the CL emission of Li2CaSi2N4:Eu2+ were investigated in detail. The results indicate that Li2CaSi2N4:Eu2+ phosphors exhibit an intense orange-red emission, no saturation effect, and excellent degradation property, which give the Li2CaSi2N4:Eu2+ phosphors potential application in full color FEDs.