ITO-free down-conversion white organic light-emitting diodes with structured color conversion layers for enhanced optical efficiency and color rendering

descriptionPublicationkeyboard_double_arrow_right Article 01 Dec 2012 Korea (Republic of) English Publisher:Elsevier BVJournal:Organic Electronics, volume 13, pages 3,145-3,153 (issn: 1566-1199,

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Authors: Koh, TW Koh, Tae-Wook; Cho, HS Cho, Hyun-Su; Yun, CH Yun, Chang-Hun; Yoo, SH Yoo, Seung-Hyup;

doi: 10.1016/j.orgel.2012.09.016

handle: 10203/104231

ITO-free down-conversion white organic light-emitting diodes with structured color conversion layers for enhanced optical efficiency and color rendering

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Abstract

Abstract We report our study on white organic light-emitting diodes (WOLEDs) implemented in a down-conversion scheme based on an ITO-free, cavity-enhanced blue phosphorescent OLED and a micro-structured color conversion layer (CCL) containing red and green phosphors. Cavity resonance induced by a ZnS/Ag/MoO 3 anode structure enables both efficiency enhancement/spectral refinement of blue phosphorescent OLED. In accordance with the resonance-induced effect, outcoupling assistance provided by micro-structuring of CCLs works to yield WOLEDs with both high efficiency and illumination-quality color rendering. Highly flexible WOLEDs are also demonstrated in the proposed scheme and tested at a radius of curvature of 10.8 mm to illustrate its advantages in realizing versatile next-generation light sources.

Country

Korea (Republic of)

Related Organizations

Korean Association Of Science and Technology Studies
Korea (Republic of)
KAIST
Korea Advanced Institute of Science and Technology
Korea (Republic of)

Keywords

DEVICES; BLUE, 535

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