Improvement of viewing angle and pixel contrast ratio in green top-emitting organic light-emitting devices.
Green top-emitting organic light-emitting devices based on tris-(8-hydroxyl-quinoline) aluminum are fabricated with a low reflective Sm/Ag cathode and a comparative Al/Ag cathode. An additional 2,9-dimethyl-4,7-diphenyl-1, 10-phenanthroline (BCP) layer, used as a light outcoupling layer, is deposited onto the SmAg cathode to improve device performances. The influence of different cathodes and the BCP layer on electrical and optical characteristics are investigated and discussed. It is worth mentioning that the introduction of the BCP layer not only enhances the brightness and the luminous efficiency but also improves the viewing angle and the pixel contrast ratio.
1Jiangsu Key Lab of Organic Electronics and Information Displays, Institute of Advanced Materials, Nanjing University of Posts and Telecommunications, Nanjing, 210003, China. sfchen_2004@163.com
Shufen
S
Chen
Wenfa
W
Xie
Wei
W
Huang
Shiyong
S
Liu
D003116:Color; D003198:Computer Simulation; D003626:Data Display; D004867:Equipment Design; D019544:Equipment Failure Analysis; D007089:Image Enhancement / Q000295:instrumentation* / Q000379:methods*; D008027:Light; D008029:Lighting / Q000295:instrumentation*; D008962:Models, Theoretical; D055095:Optics and Photonics / Q000295:instrumentation; D009930:Organic Chemicals / Q000737:chemistry*; D012542:Scattering, Radiation
D009930:Organic Chemicals