Photon management in solution-processed organic light-emitting diodes: a review of light outcoupling micro- and nanostructures

To allow a greater acceptance in the display and lighting markets, organic light-emitting diode (OLED) technology is currently the subject of intensive research efforts aimed at manufacturing cost-effective devices with higher efficiencies. In this regard, strategies matured in the field of photonic...

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Published inJournal of photonics for energy Vol. 6; no. 3; p. 030901
Main Authors Gomard, Guillaume, Preinfalk, Jan B, Egel, Amos, Lemmer, Uli
Format Journal Article
LanguageEnglish
Published Society of Photo-Optical Instrumentation Engineers 01.07.2016
Subjects
light outcoupling
diffraction gratings
optical simulations
organic light-emitting diodes
microlens array
electromagnetic scattering
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Summary:To allow a greater acceptance in the display and lighting markets, organic light-emitting diode (OLED) technology is currently the subject of intensive research efforts aimed at manufacturing cost-effective devices with higher efficiencies. In this regard, strategies matured in the field of photonics and nanophotonics can be applied for photon management purposes to improve the outcoupling of the generated light and to control the emission pattern. In this review, we report on the recent experimental and numerical advances to pursue those goals by highlighting the example of bottom-emitting devices. The cases of periodical micro- and nanostructures, as well as of stochastic ensembles that can be easily implemented using printing techniques, are covered herein. It is shown that beyond the sole optical properties, such additional elements can simultaneously improve the electrical characteristics of solution-processed OLEDs, and thus enable an optimization of the devices at different levels.
ISSN:1947-7988
1947-7988
DOI:10.1117/1.JPE.6.030901