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Journal of Photonics for Energy

Strategies for light extraction from surface plasmons in organic light-emitting diodes
Author(s): Jörg Frischeisen; Bert Scholz; Benedikt Arndt; Tobias Schmidt; Robert Gehlhaar; Chihaya Adachi; Wolfgang Brütting
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Paper Abstract

Organic light-emitting diodes (OLEDs) usually exhibit a low light-outcoupling efficiency of only 20%. Typically, more than 30% of the available power is lost to surface plasmons (SPs). Consequently, the overall efficiency could be strongly enhanced by recovering SP losses. Therefore, three suitable techniques for extracting SPs-index coupling, prism coupling, and grating coupling-are discussed from a theoretical point of view and investigated experimentally in simplified OLED-like structures. The basic physical processes are clarified by systematic variations of the involved layer thicknesses and by excited state lifetime measurements. In addition, the analysis of the results is supported by optical simulations based on a dipole model. Finally, the advantages and disadvantages of each method, their potential efficiency for recovering SP losses, as well as the applicability in OLEDs are compared.

Paper Details

Date Published: 1 January 2011
PDF: 18 pages
J. Photon. Energy 1(1) 011004 doi: 10.1117/1.3523314
Published in: Journal of Photonics for Energy Volume 1, Issue 1
Show Author Affiliations
Jörg Frischeisen, Univ. Augsburg (Germany)
Bert Scholz, Univ. Augsburg (Germany)
Benedikt Arndt, Univ. Augsburg (Germany)
Tobias Schmidt, Univ. Augsburg (Germany)
Robert Gehlhaar, Kyushu Univ. (Japan)
Chihaya Adachi, Kyushu Univ. (Japan)
Wolfgang Brütting, Univ. Augsburg (Germany)

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