Document Type

Journal Article

Department/Unit

Department of Chemistry

Title

Improving efficiency roll-off in organic light emitting devices with a fluorescence-interlayer-phosphorescence emission architecture

Language

English

Abstract

Organic light emitting devices (OLEDs) with a fluorescence-interlayer- phosphorescence emission layer structure (FIP EML) has been proposed to solve the efficiency roll-off issue effectively. Efficient green OLED based on FIP EML exhibiting only 26% roll-off in the luminance efficiency, which is lower than the typical roll-off of 51% for conventional phosphorescent OLEDs with single EML operated at 5-150 mA/cm2 range, has been demonstrated. Such enhancement should be attributed to the improved carrier balance, the exciton redistribution in recombination zone, the suppression of nonradiative exciton quenching processes, and the elimination of energy transfer loss offered by the FIP EML structure. © 2009 American Institute of Physics.

Publication Date

2009

Source Publication Title

Applied Physics Letters

Volume

95

Start Page

133304-1

End Page

133304-3

Publisher

American Institute of Physics

DOI

10.1063/1.3241079

Link to Publisher's Edition

http://dx.doi.org/10.1063/1.3241079

ISSN (print)

00036951

ISSN (electronic)

10773118

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