Yellowing effects of TiO2/Epoxy nano composite layer on organic light emitting diodes with internal light extraction structure

Author

Cho, Ooo-Hee ; Choi, Seongwoo ; Shin, Jin-Wook ; Moon, Jaehyun ; Han, Jun-Han ; Huh, Jin Woo ; Joo, Chul Woong ; Hwang, Joohyun ; Chu, Hye Yong ; Lee, Jeong-Ik

Author_Institution

OLED Lighting Team, ETRI, Daejeon, South Korea

fYear

2011

fDate

18-21 Oct. 2011

Firstpage

133

Lastpage

136

Abstract

We have developed the highly efficient OLEDs using the embossed glass substrate and the low yellowing TiO₂/Epoxy nano composite layer. The nano composite can be applied to a scattering layer and a planarization layer on an embossed glass. The TiO₂/Epoxy nano composite was effective for increasing the light extraction efficiency of OLEDs, however the yellowing degraded the luminous efficacy seriously. The luminous efficacy of the OLED with the nano composite layer on the embossed glass was 21.0 lm/W at 1000 cd/m² and it increased by 36% compared to the conventional OLED.

Keywords

nanocomposites; organic light emitting diodes; planarisation; resins; titanium compounds; SiO₂; TiO₂; embossed glass substrate; epoxy nanocomposite layer; internal light extraction; luminous efficacy; organic light emitting diodes; planarization layer; scattering layer; yellowing effects; Current measurement; Indium tin oxide; Moisture measurement; Organic light emitting diodes; Refractive index; Substrates;

fLanguage

English

Publisher

ieee

Conference_Titel

Nanotechnology Materials and Devices Conference (NMDC), 2011 IEEE

Conference_Location

Jeju

Print_ISBN

978-1-4577-2139-7

Type

conf

DOI

10.1109/NMDC.2011.6155326

Filename

6155326