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Enhancing Light Extraction in Top‐Emitting Organic Light‐Emitting Devices Using Molded Transparent Polymer Microlens Arrays
Author(s) -
Wrzesniewski Edward,
Eom SangHyun,
Cao Weiran,
Hammond William T.,
Lee Sangjun,
Douglas Elliot P.,
Xue Jiangeng
Publication year - 2012
Publication title -
small
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.785
H-Index - 236
eISSN - 1613-6829
pISSN - 1613-6810
DOI - 10.1002/smll.201102662
Subject(s) - microlens , materials science , oled , optoelectronics , polymer , electrode , extraction (chemistry) , light emitting diode , optics , nanotechnology , layer (electronics) , lens (geology) , composite material , chemistry , physics , chromatography
The light extraction efficiency in organic light‐emitting devices (OLEDs) is enhanced by up to 2.6 times when a close‐packed, hemispherical transparent polymer microlens array (MLA) is molded on the light‐emitting surface of a top‐emitting device. The microlens array helps to extract the waveguided optical emission in the organic layers and the transparent top electrode, and can be manufactured in large area with low cost.