Thin-film oxide phosphors as electroluminescent materials

被引：13

作者：

Minami, T ^{[1
]}

机构：

[1] Kanazawa Inst Technol, Electron Device Syst Lab, Nonoichi, Ishikawa 9218501, Japan

来源：

LUMINESCENT MATERIALS | 1999年 / 560卷

关键词：

D O I：

10.1557/PROC-560-47

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

In this paper, we introduce rare earth- or transition metal-activated oxide phosphor thin films prepared by magnetron sputtering and dip-coated solution deposition. Thin-film electroluminescent (TFEL) devices using these oxide phosphor thin films as the emitting layer were investigated with a single insulating layer device structure using a thick ceramic sheet insulating layer. High-luminance multicolor emissions and high luminous efficiencies were obtained in TFEL devices using various oxide phosphors: binary compound, Ga2O3; ternary compound, Zn2SiO4, CaGa2O4 and ZnGa2O4; and multicomponent oxide, Zn2SiO4-Zn2GeO4 system. Luminances above 2000 cd/m(2) were obtained in CaGa2O4:Mn and Zn2Si1-XGeXO4:Mn TFEL devices driven at I kHz. Maximum luminous efficiencies of 2.53, 1.7 and 1.2 1m/W were obtained in Zn2SiO0.7Ge0.3O4:Mn, Ga2O3:Mn and ZnGa2O4:Mn TFEL devices, respectively. Stable long-term operation was obtained in dip-coated and sputtered Ga2O3:Mn phosphor TFEL devices even when driven at 10 kHz. Various thin-film oxide phosphors activated with transition metals are suitable for the emitting layer of full-color electroluminescent displays (ELD) without the use of color filters. In particular, Ga2O3 is very promising as a phosphor host material for ELDs.

引用

页码：47 / 58

页数：12