Efficient micro-cavity top emission OLED with optimized Mg: Ag ratio cathode

被引：56

作者：

Kwon, Sun-kap ^{[1
,2
]}

Lee, Eun-Hyung ^{[1
]}

Kim, Kwan-soo ^{[1
]}

Choi, Hyun-chul ^{[1
]}

Park, Mi Jin ^{[2
]}

Kim, Seong Keun ^{[2
]}

Pode, Ramchandra ^{[3
]}

Kwon, Jang Hyuk ^{[2
]}

机构：

[1] LG Display, Wollong Myeon Paju Si 413779, Gyeonggi Do, South Korea

[2] Kyung Hee Univ, Dept Informat Display, Seoul 02447, South Korea

[3] Kyung Hee Univ, Dept Phys, Seoul 02447, South Korea

来源：

OPTICS EXPRESS | 2017年 / 25卷 / 24期

关键词：

LIGHT-EMITTING DEVICES; ELECTROLUMINESCENT DEVICES; MULTILAYER ELECTRODE; SATURATED COLOR; SOLAR-CELLS; TRANSPARENT; DIODES; PERFORMANCE; INJECTION; FILMS;

D O I：

10.1364/OE.25.029906

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Micro-cavity top-emitting organic light emitting diodes (TEOLEDs) are now receiving prominence as a technology for the active matrix display applications. The semi-transparent metal cathode plays the crucial role in realizing TEOLEDs structure. Here, we report the optimization results on Mg: Ag ratio as the semitransparent cathode deposited by vacuum thermal evaporation. The optimized Mg: Ag cathode with 1: 10 ratio (wt %) shows a sheet resistance value as low as 5.2 Omega/square, an average transmittance of 49.7%, reflectance of 41.4%, and absorbance of 8.9% over the visible spectral region (400 similar to 700 nm). The fabricated red TEOLEDs device implemented using LiF (1nm)/Mg: Ag (1: 10) cathode shows the voltage value of 4.17 V at a current density of 10.00 mA/cm(2), and current efficiencies variation from 55.3 to 50.1 cd/A over the brightness range 2,000 - 12,000 cd/m(2). The electroluminescence (EL) spectrum displays the light emission at 608 nm wavelength with a half width of 29.5 nm. The narrow half-width of red light emission is attributed to the micro-cavity effects due to the semitransparent cathode. (C) 2017 Optical Society of America under the terms of the OSA Open Access Publishing Agreement

引用

页码：29906 / 29915

页数：10