Strategies for light extraction from surface plasmons in organic light-emitting diodes

Jörg Frischeisen, Bert J. Scholz, Benedikt J. Arndt, Tobias D. Schmidt, Robert Gehlhaar, Chihaya Adachi, Wolfgang Brüttinga

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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 simplifiedOLED-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.

Original languageEnglish
Article number011004
JournalJournal of Photonics for Energy
Volume1
Issue number1
DOIs
Publication statusPublished - 2011

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics
  • Renewable Energy, Sustainability and the Environment

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    Frischeisen, J., Scholz, B. J., Arndt, B. J., Schmidt, T. D., Gehlhaar, R., Adachi, C., & Brüttinga, W. (2011). Strategies for light extraction from surface plasmons in organic light-emitting diodes. Journal of Photonics for Energy, 1(1), [011004]. https://doi.org/10.1117/1.3523314