Analysis of the external and internal quantum efficiency of multi-emitter, white organic light emitting diodes

Mauro Furno*, Thomas C. Rosenow, Malte C. Gather, Bjoern Luessem, Karl Leo

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

22 Citations (Scopus)

Abstract

We report on a theoretical framework for the efficiency analysis of complex, multi-emitter organic light emitting diodes (OLEDs). The calculation approach makes use of electromagnetic modeling to quantify the overall OLED photon outcoupling efficiency and a phenomenological description for electrical and excitonic processes. From the comparison of optical modeling results and measurements of the total external quantum efficiency, we obtain reliable estimates of internal quantum yield. As application of the model, we analyze high-efficiency stacked white OLEDs and comment on the various efficiency loss channels present in the devices. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4757610]

Original languageEnglish
Article number143304
Number of pages4
JournalApplied Physics Letters
Volume101
Issue number14
DOIs
Publication statusPublished - 1 Oct 2012

Keywords

  • EMISSION

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