Optical Performance Improvement Mechanism of Multimode-Emitted White Resonant Cavity Organic Light-Emitting Diodes

Author

Lee, Ching-Ting ; Yu, Li-Zhen ; Liu, Hsin-You

Author_Institution

Dept. of Electr. Eng., Nat. Cheng Kung Univ., Tainan, Taiwan

Volume

22

Issue

5

fYear

2010

fDate

3/1/2010 12:00:00 AM

Firstpage

272

Lastpage

274

Abstract

A microcavity Fabry-Pe??rot resonator was constructed using a high reflective Al metal and SiO₂ -TiO₂ distributed Bragg reflector. Resonant cavity organic light-emitting diodes (RCOLEDs) were fabricated using the microcavity Fabry-Pe??rot resonator and the conventional organic light-emitting diodes. To improve the optical performances, four-mode emission of the RCOLEDs was resulted by using SiO₂ filler layer to extend the microcavity length. The improvement of the Commission Internationale d´Eclarirage and color-rendering index is attributed to the four-mode emission. The enhancement of brightness and luminance efficiency was attributed to the stimulated emission in the microcavity Fabry-Pe??rot resonator.

Keywords

Fabry-Perot resonators; aluminium; micromechanical resonators; organic light emitting diodes; silicon compounds; titanium compounds; Commission Internationale d´Eclarirage; SiO₂-TiO₂; brightness enhancement; color-rendering index; distributed Bragg reflector; luminance enhancement; microcavity Fabry-Pe??rot resonator; multimode-emitted white resonant cavity organic light-emitting diodes; Distributed Bragg reflector (DBR); four-mode emission; organic light-emitting diodes (OLEDs); resonant microcavity;

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/LPT.2009.2038593

Filename

5378546