Extremely simplified, high-performance, and doping-free white organic light-emitting diodes based on a single thermally activated delayed fluorescent emitter

For the first time, extremely simplified yet high-performance thermally activated delayed fluorescent (TADF) white organic light-emitting diodes (WOLEDs) have been demonstrated. Unlike previous concepts, only a single molecular emitter is required for high-quality white emissions, where an intrinsic...

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Main Authors: Luo, Dongxiang, Chen, Qizan, Gao, Yuan, Zhang, Menglong, Liu, Baiquan
Other Authors: School of Electrical and Electronic Engineering
Format: Article
Language:English
Published: 2020
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Online Access:https://hdl.handle.net/10356/143572
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Institution: Nanyang Technological University
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spelling sg-ntu-dr.10356-1435722020-09-09T08:51:23Z Extremely simplified, high-performance, and doping-free white organic light-emitting diodes based on a single thermally activated delayed fluorescent emitter Luo, Dongxiang Chen, Qizan Gao, Yuan Zhang, Menglong Liu, Baiquan School of Electrical and Electronic Engineering Engineering::Electrical and electronic engineering Excitons Diodes For the first time, extremely simplified yet high-performance thermally activated delayed fluorescent (TADF) white organic light-emitting diodes (WOLEDs) have been demonstrated. Unlike previous concepts, only a single molecular emitter is required for high-quality white emissions, where an intrinsic TADF emitter is sandwiched between p-type and n-type layers, forming a doping-free p-i-n WOLED. The WOLED exhibits a color rendering index (CRI) of 91, the first WOLED that overtakes its counterparts (single-emitter white polymer/inorganic LEDs). The maximum total external quantum efficiency (28.4%) and power efficiency (68.5 lm W–1) are comparable to those of state-of-the-art doped TADF WOLEDs and doping-free phosphorescent WOLEDs and higher than those of TADF WOLEDs with ultrahigh CRIs (≥90) and high-quality single-emitter white LEDs. Significantly, this is the first TADF WOLED possessing ultrahigh CRIs at high luminance, and 18 796 cd m–2 is 370% higher than that of the previous best-performing one. Moreover, the proposed WOLED is the simplest TADF WOLED. 2020-09-09T08:51:23Z 2020-09-09T08:51:23Z 2018 Journal Article Luo, D., Chen, Q., Gao, Y., Zhang, M., & Liu, B. (2018). Extremely simplified, high-performance, and doping-free white organic light-emitting diodes based on a single thermally activated delayed fluorescent emitter. ACS Energy Letters, 3(7), 1531–1538. doi:10.1021/acsenergylett.8b00711 2380-8195 https://hdl.handle.net/10356/143572 10.1021/acsenergylett.8b00711 7 3 1531 1538 en ACS Energy Letters © 2018 American Chemical Society. All rights reserved.
institution Nanyang Technological University
building NTU Library
country Singapore
collection DR-NTU
language English
topic Engineering::Electrical and electronic engineering
Excitons
Diodes
spellingShingle Engineering::Electrical and electronic engineering
Excitons
Diodes
Luo, Dongxiang
Chen, Qizan
Gao, Yuan
Zhang, Menglong
Liu, Baiquan
Extremely simplified, high-performance, and doping-free white organic light-emitting diodes based on a single thermally activated delayed fluorescent emitter
description For the first time, extremely simplified yet high-performance thermally activated delayed fluorescent (TADF) white organic light-emitting diodes (WOLEDs) have been demonstrated. Unlike previous concepts, only a single molecular emitter is required for high-quality white emissions, where an intrinsic TADF emitter is sandwiched between p-type and n-type layers, forming a doping-free p-i-n WOLED. The WOLED exhibits a color rendering index (CRI) of 91, the first WOLED that overtakes its counterparts (single-emitter white polymer/inorganic LEDs). The maximum total external quantum efficiency (28.4%) and power efficiency (68.5 lm W–1) are comparable to those of state-of-the-art doped TADF WOLEDs and doping-free phosphorescent WOLEDs and higher than those of TADF WOLEDs with ultrahigh CRIs (≥90) and high-quality single-emitter white LEDs. Significantly, this is the first TADF WOLED possessing ultrahigh CRIs at high luminance, and 18 796 cd m–2 is 370% higher than that of the previous best-performing one. Moreover, the proposed WOLED is the simplest TADF WOLED.
author2 School of Electrical and Electronic Engineering
author_facet School of Electrical and Electronic Engineering
Luo, Dongxiang
Chen, Qizan
Gao, Yuan
Zhang, Menglong
Liu, Baiquan
format Article
author Luo, Dongxiang
Chen, Qizan
Gao, Yuan
Zhang, Menglong
Liu, Baiquan
author_sort Luo, Dongxiang
title Extremely simplified, high-performance, and doping-free white organic light-emitting diodes based on a single thermally activated delayed fluorescent emitter
title_short Extremely simplified, high-performance, and doping-free white organic light-emitting diodes based on a single thermally activated delayed fluorescent emitter
title_full Extremely simplified, high-performance, and doping-free white organic light-emitting diodes based on a single thermally activated delayed fluorescent emitter
title_fullStr Extremely simplified, high-performance, and doping-free white organic light-emitting diodes based on a single thermally activated delayed fluorescent emitter
title_full_unstemmed Extremely simplified, high-performance, and doping-free white organic light-emitting diodes based on a single thermally activated delayed fluorescent emitter
title_sort extremely simplified, high-performance, and doping-free white organic light-emitting diodes based on a single thermally activated delayed fluorescent emitter
publishDate 2020
url https://hdl.handle.net/10356/143572
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