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|Title:||Graded-host phosphorescent light-emitting diodes with high efficiency and reduced roll-off||Authors:||Liu, S. W.
Demir, Hilmi Volkan
|Keywords:||DRNTU::Engineering::Electrical and electronic engineering::Optics, optoelectronics, photonics||Issue Date:||2012||Source:||Liu, S. W., Sun, X., & Demir, H. V. (2012). Graded-host phosphorescent light-emitting diodes with high efficiency and reduced roll-off. AIP Advances, 2(1), 012192-.||Series/Report no.:||AIP advances||Abstract:||We demonstrated graded-host phosphorescent organic light-emitting diodes with high efficiency and reduced efficiency roll-off. The emissive layer of the graded host device consists of both electron and hole transport type hosts, 1,3,5-tris(N-phenylbenzimidazole-2-yl)benzene (TPBI) and 4,4′,4′′-tris(N-carbazolyl)triphenylamine, respectively, with graded composition, and the phosphorescent red emitter bis(2-phenylquinoline) (acetylacetonate) iridium(III), which was uniformly doped into the graded host matrix. The graded host device shows improved quantum efficiency and power efficiency with significantly reduced efficiency roll-off as compared to the unipolar-host and double layer heterojunction host devices.||URI:||https://hdl.handle.net/10356/96009
|DOI:||10.1063/1.3701685||Rights:||© 2012 The Authors. This paper was published in AIP Advances and is made available as an electronic reprint (preprint) with permission of the authors. The paper can be found at the following official DOI: [http://dx.doi.org/10.1063/1.3701685]. One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper is prohibited and is subject to penalties under law.||Fulltext Permission:||open||Fulltext Availability:||With Fulltext|
|Appears in Collections:||EEE Journal Articles|
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