A novel Li 2 CaSi 2 N 4 :Eu 2+ orange‐red phosphor for field‐emission displays

• Published in: Journal of the American Ceramic Society 2019-06, Vol.102 (6), p.3517-3524
• Main Authors: Wu, Quansheng, He, Ziyu, Zhang, Hanqiang, Chen, Hande, Zhou, Jiangcong, Xiong, Jinhua, Hu, Zhibiao
• Format: Article
• Language: English
• ISSN: 0002-7820; 1551-2916
• DOI: 10.1111/jace.16203

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 Li 2 CaSi 2 N 4 :Eu 2+ 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 5d→4f 7 electron transition of Eu 2+ ion. The influences of the Eu 2+ doping concentration, filament current, accelerating voltage, and bombardment time on the CL emission of Li 2 CaSi 2 N 4 :Eu 2+ were investigated in detail. The results indicate that Li 2 CaSi 2 N 4 :Eu 2+ phosphors exhibit an intense orange‐red emission, no saturation effect, and excellent degradation property, which give the Li 2 CaSi 2 N 4 :Eu 2+ phosphors potential application in full color FEDs.