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Low-haze light extraction from organic light-emitting diode lighting with auxiliary electrode by selective microlens arrays

Authors
Hwang, Ju HyunPark, Tae HyunLee, Hyun JunChoi, Kyung BokPark, Young WookJu, Byeong-Kwon
Issue Date
15-10월-2013
Publisher
OPTICAL SOC AMER
Keywords
organic light emitting diode
Citation
OPTICS LETTERS, v.38, no.20, pp.4182 - 4185
Indexed
SCIE
SCOPUS
Journal Title
OPTICS LETTERS
Volume
38
Number
20
Start Page
4182
End Page
4185
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/101866
DOI
10.1364/OL.38.004182
ISSN
0146-9592
Abstract
Improved out-coupling efficiency and low haze of organic light-emitting diode (OLED) lighting with an auxiliary electrode are demonstrated by selective microlens arrays (SMLAs). The microlens arrays, aligned with the auxiliary electrode, were selectively fabricated, since the fully packed microlens arrays lead to OLED lighting with high haze. The external quantum efficiency and power efficiency of the devices with the SMLAs increased by 32% when compared with the devices without these arrays. Using the SMLAs, dark grid lines in the emission region became brighter, with a low haze, and the spectra of the emitted light had no shift. (C) 2013 Optical Society of America
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