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Journal Article Highly Efficient White Transparent Organic Light Emitting Diodes with Nano-Structured Substrate
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Authors
Chul Woong Joo, Jin-Wook Shin, Jaehyun Moon, Jin Woo Huh, Doo-Hee Cho, Jonghee Lee, Seung Koo Park, Nam Sung Cho, Jun-Han Han, Hye Yong Chu, Jeong-Ik Lee
Issue Date
2016-02
Citation
Organic Electronics, v.29, pp.72-78
ISSN
1566-1199
Publisher
Elsevier
Language
English
Type
Journal Article
DOI
https://dx.doi.org/10.1016/j.orgel.2015.11.016
Abstract
Enhancing outcoupling efficiency and stabilizing emission spectra are of high technical importance in realizing high quality white transparent organic light emitting diodes (TOLEDs). In this work, we demonstrate a random nano-scattering layer (RSL) as a structure which can effectively address those tasks. The RSL contributes to bottom and top emissions by scattering and reflection, respectively. With the use of RSL, we achieved remarkable total efficiency enhancement of 101%. Also, a viewing angle independent stable white spectrum with a color rendering index of 79 was achieved. With its straight forward processing, our RSL can be readily applied to deal with various photonic applications to enhance both efficiency and emission spectra.