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Title: On the triplet distribution and its effect on an improved phosphorescent organic light-emitting diode
Authors: Liu, S. W.
Divayana, Yoga
Abiyasa, Agus Putu
Tan, Swee Tiam
Demir, Hilmi Volkan
Sun, Xiaowei
Keywords: DRNTU::Engineering::Electrical and electronic engineering
Issue Date: 2012
Source: Liu, S. W., Divayana, Y., Abiyasa, A. P., Tan, S. T., Demir, H. V., & Sun, X. (2012). On the triplet distribution and its effect on an improved phosphorescent organic light-emitting diode. Applied physics letters, 101(9), 093301.
Series/Report no.: Applied physics letters
Abstract: We reported phosphorescent organic light-emitting diodes with internal quantum efficiency near 100% with significantly reduced efficiency roll-off. It was found that the use of different hole transporting layer (HTL) affects the exciton distribution in the emission region significantly. Our best device reaches external quantum efficiency (EQE), current, and power efficiency of 22.8% ± 0.1%, 78.6 ± 0.2 cd/A, 85 ± 2 lm/W, respectively, with half current of 158.2 mA/cm2. This considerably outperforms the control device with N,N′-bis(naphthalen-1-yl)-N,N′-bis(phenyl)-benzidine (NPB) (HTL) and 4,4′-N,N′-dicarbazole-biphenyl (host) with maximum EQE, current and power efficiency of 19.1% ± 0.1%, 65.6 ± 0.3 cd/A, 67 ± 2 lm/W, respectively, with half current of only 8.1 mA/cm2.
ISSN: 0003-6951
DOI: 10.1063/1.4749278
Rights: © 2012 American Institute of Physics. This paper was published in Applied Physics Letters and is made available as an electronic reprint (preprint) with permission of American Institute of Physics. The paper can be found at the following official DOI: []. 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
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