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Enhancing light extraction in top-emitting organic light-emitting devices using molded transparent polymer microlens
Edward Wrzesniewski1, Sang-Hyun Eom, Weiran Cao
1Department of Materials Science and Engineering, University of Florida, Gainesville, 32611, USA.
Small (Weinheim an Der Bergstrasse, Germany)
|June 9, 2012
Abstract:
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.
