A non-doped phosphorescent organic light-emitting device with above 31% external quantum efficiency

Qi Wang; Iain W H Oswald; Xiaolong Yang; Guijiang Zhou; Huiping Jia; Qiquan Qiao; Yonghua Chen; Jason Hoshikawa-Halbert; Bruce E Gnade

doi:10.1002/adma.201402947

A non-doped phosphorescent organic light-emitting device with above 31% external quantum efficiency

Adv Mater. 2014 Dec 23;26(48):8107-13. doi: 10.1002/adma.201402947. Epub 2014 Sep 15.

Authors

Qi Wang¹, Iain W H Oswald, Xiaolong Yang, Guijiang Zhou, Huiping Jia, Qiquan Qiao, Yonghua Chen, Jason Hoshikawa-Halbert, Bruce E Gnade

Affiliation

¹ Department of Materials Science and Engineering and Erik Jonsson School of Engineering and Computer Science, University of Texas at Dallas, Richardson, TX, 75083, USA; Department of Electrical Engineering and Computer Sciences, College of Engineering, South Dakota State University, Brookings, SD, 57007, USA; Department of Applied Chemistry, Xi'an Jiaotong University, Xi'an, 710049, P. R. China.

PMID: 25219957
DOI: 10.1002/adma.201402947

Abstract

The demonstrated square-planar Pt(II)-complex has reduced triplet-triplet quenching and therefore a near unity quantum yield in the neat thin film. A non-doped phosphorescent organic light-emitting diode (PhOLED) based on this emitter achieves (31.1 ± 0.1)% external quantum efficiency without any out-coupling, which shows that a non-doped PhOLED can be comparable in efficiency to the best doped devices with very complicated device structures.

Keywords: organic; non-doped devices; metal complexation; phosphorescence; light-emitting diodes.