Unlocking the full potential of conducting polymers for high-efficiency organic light-emitting devices

Yi-Hsiang Huang; Wei-Lung Tsai; Wei-Kai Lee; Min Jiao; Chun-Yang Lu; Chun-Yu Lin; Chien-Yu Chen; Chung-Chih Wu

doi:10.1002/adma.201404546

Unlocking the full potential of conducting polymers for high-efficiency organic light-emitting devices

Adv Mater. 2015 Feb 4;27(5):929-34. doi: 10.1002/adma.201404546. Epub 2014 Dec 12.

Authors

Yi-Hsiang Huang¹, Wei-Lung Tsai, Wei-Kai Lee, Min Jiao, Chun-Yang Lu, Chun-Yu Lin, Chien-Yu Chen, Chung-Chih Wu

Affiliation

¹ Department of Electrical Engineering, Graduate Institute of Electronics Engineering and Graduate Institute of Photonics and Optoelectronics and Innovative Photonics Advanced Research Center (i-PARC), National Taiwan University, Taipei, 10617, Taiwan.

PMID: 25504674
DOI: 10.1002/adma.201404546

Abstract

By carefully tuning the thicknesses of low-optical index PEDOT:PSS and high-index ITO layers in organic light-emitting devices (OLEDs), very high optical coupling efficiencies can be obtained through the generation of appropriate microcavity effects. These experiments result in an external quantum efficiency (EQE) of 33.7% for green phosphorescent OLEDs and even higher EQEs of 54.3% can be obtained by adopting an external out-coupling lens.

Keywords: conducting polymers; ogranic light-emitting devices (OLEDs).