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Updated: Apr 23, 2026

Development of Efficient OLEDs from Solution Deposition
Published on: November 4, 2022
A non-doped phosphorescent organic light-emitting device with above 31% external quantum efficiency
Qi Wang1, Iain W H Oswald, Xiaolong Yang
1Department 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.
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.
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