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Journal Article Random Nanostructure Scattering Layer for Suppression of Microcavity Effect and Light Extraction in OLEDs
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Authors
Jin-Wook Shin, Doo-Hee Cho, Jaehyun Moon, Chul Woong Joo, Jonghee Lee, Jin Woo Huh, Seung Koo Park, Jun-Han Han, Nam Sung Cho, Joohyun Hwang, Hye Yong Chu, Jeong-Ik Lee
Issue Date
2014-06
Citation
Optics Letters, v.39, no.12, pp.3527-3530
ISSN
0146-9592
Publisher
Optical Society of America(OSA),
Language
English
Type
Journal Article
DOI
https://dx.doi.org/10.1364/OL.39.003527
Abstract
In this study, we investigated the effect of a random nanostructure scattering layer (RSL) on the microcavity and light extraction in organic light emitting diodes (OLEDs). In the case of the conventional OLED, the optical properties change with the thickness of the hole transporting layer (HTL) because of the presence of a microcavity. However, OLEDs equipped with the an RSL showed similar values of external quantum efficiency and luminous efficacy regardless of the HTL thickness. These phenomena can be understood by the scattering effect because of the RSL, which suppresses the microcavity effect and extracts the light confined in the device. Moreover, OLEDs with the RSL led to reduced spectrum and color changes with the viewing angle. © 2014 Optical Society of America.
KSP Keywords
External Quantum Efficiency, Microcavity effect, Properties change, Scattering effect, Scattering layer, color change, hole transporting layer, light emitting diodes(LED), light extraction, luminous efficacy, optical properties