title: A non-doped phosphorescent organic light-emitting device with above 31% external quantum efficiency.
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.
authors.affiliation: 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.
authors.forename: Qi
authors.initials: Q
authors.lastname: Wang
authors.forename: Iain W H
authors.initials: IW
authors.lastname: Oswald
authors.forename: Xiaolong
authors.initials: X
authors.lastname: Yang
authors.forename: Guijiang
authors.initials: G
authors.lastname: Zhou
authors.forename: Huiping
authors.initials: H
authors.lastname: Jia
authors.forename: Qiquan
authors.initials: Q
authors.lastname: Qiao
authors.forename: Yonghua
authors.initials: Y
authors.lastname: Chen
authors.forename: Jason
authors.initials: J
authors.lastname: Hoshikawa-Halbert
authors.forename: Bruce E
authors.initials: BE
authors.lastname: Gnade
keywords: organic; non-doped devices; metal complexation; phosphorescence; light-emitting diodes