Sensitized Fluorescence Organic Light-Emitting Diodes with Reduced Efficiency Roll-off

Thermally activated delayed fluorescence (TADF) sensitized fluorescence is a promising strategy to maintain the advantage of TADF materials and fluorescent materials. Nevertheless, the delayed lifetime of TADF sensitizer is still relatively long, which cause heavy efficiency roll-off. Here we report...

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Autores principales:	Zhiyi Li, Ruifang Wang, Yangyang Zeng, Xiangyu Dong, Guanhao Liu, Xiaoxiao Hu, Teng Gao, Honglei Gao, Yuanyuan Qin, Xiuxian Gu, Chun-Sing Lee, Jiguang Liu, Pengfei Wang, Ying Wang
Formato:	article
Lenguaje:	EN
Publicado:	Georg Thieme Verlag 2021
Materias:	Chemistry QD1-999
Acceso en línea:	https://doaj.org/article/4e054bd32c844c07a465534d58fa3f4b
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spelling	oai:doaj.org-article:4e054bd32c844c07a465534d58fa3f4b2021-12-03T00:12:46ZSensitized Fluorescence Organic Light-Emitting Diodes with Reduced Efficiency Roll-off2625-182510.1055/a-1711-5768https://doaj.org/article/4e054bd32c844c07a465534d58fa3f4b2021-12-01T00:00:00Zhttp://www.thieme-connect.de/DOI/DOI?10.1055/a-1711-5768https://doaj.org/toc/2625-1825Thermally activated delayed fluorescence (TADF) sensitized fluorescence is a promising strategy to maintain the advantage of TADF materials and fluorescent materials. Nevertheless, the delayed lifetime of TADF sensitizer is still relatively long, which cause heavy efficiency roll-off. Here we reported a valid tactic to construct fluorescent devices with low efficiency roll-off by utilizing the TADF sensitizer with reduced delayed lifetime. By construct the sensitization system, the energy transfer efficiency can up to 90%. The high energy transfer efficiency and the TADF’s short delayed lifetime result in the high sensitization over 95%, maximum external quantum efficiency of 16.2%. Meanwhile the TADF sensitized-fluorescent devices exhibit reduced efficiency roll-off with a “onset” current density of 23 mA cm-2. Our results provide an effective strategy to reduce the efficiency roll-off of TADF sensitization system.Zhiyi LiRuifang WangYangyang ZengXiangyu DongGuanhao LiuXiaoxiao HuTeng GaoHonglei GaoYuanyuan QinXiuxian GuChun-Sing LeeJiguang LiuPengfei WangYing WangGeorg Thieme VerlagarticleChemistryQD1-999ENOrganic Materials (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Chemistry QD1-999
spellingShingle	Chemistry QD1-999 Zhiyi Li Ruifang Wang Yangyang Zeng Xiangyu Dong Guanhao Liu Xiaoxiao Hu Teng Gao Honglei Gao Yuanyuan Qin Xiuxian Gu Chun-Sing Lee Jiguang Liu Pengfei Wang Ying Wang Sensitized Fluorescence Organic Light-Emitting Diodes with Reduced Efficiency Roll-off
description	Thermally activated delayed fluorescence (TADF) sensitized fluorescence is a promising strategy to maintain the advantage of TADF materials and fluorescent materials. Nevertheless, the delayed lifetime of TADF sensitizer is still relatively long, which cause heavy efficiency roll-off. Here we reported a valid tactic to construct fluorescent devices with low efficiency roll-off by utilizing the TADF sensitizer with reduced delayed lifetime. By construct the sensitization system, the energy transfer efficiency can up to 90%. The high energy transfer efficiency and the TADF’s short delayed lifetime result in the high sensitization over 95%, maximum external quantum efficiency of 16.2%. Meanwhile the TADF sensitized-fluorescent devices exhibit reduced efficiency roll-off with a “onset” current density of 23 mA cm-2. Our results provide an effective strategy to reduce the efficiency roll-off of TADF sensitization system.
format	article
author	Zhiyi Li Ruifang Wang Yangyang Zeng Xiangyu Dong Guanhao Liu Xiaoxiao Hu Teng Gao Honglei Gao Yuanyuan Qin Xiuxian Gu Chun-Sing Lee Jiguang Liu Pengfei Wang Ying Wang
author_facet	Zhiyi Li Ruifang Wang Yangyang Zeng Xiangyu Dong Guanhao Liu Xiaoxiao Hu Teng Gao Honglei Gao Yuanyuan Qin Xiuxian Gu Chun-Sing Lee Jiguang Liu Pengfei Wang Ying Wang
author_sort	Zhiyi Li
title	Sensitized Fluorescence Organic Light-Emitting Diodes with Reduced Efficiency Roll-off
title_short	Sensitized Fluorescence Organic Light-Emitting Diodes with Reduced Efficiency Roll-off
title_full	Sensitized Fluorescence Organic Light-Emitting Diodes with Reduced Efficiency Roll-off
title_fullStr	Sensitized Fluorescence Organic Light-Emitting Diodes with Reduced Efficiency Roll-off
title_full_unstemmed	Sensitized Fluorescence Organic Light-Emitting Diodes with Reduced Efficiency Roll-off
title_sort	sensitized fluorescence organic light-emitting diodes with reduced efficiency roll-off
publisher	Georg Thieme Verlag
publishDate	2021
url	https://doaj.org/article/4e054bd32c844c07a465534d58fa3f4b
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_version_	1718373985634222080

Sensitized Fluorescence Organic Light-Emitting Diodes with Reduced Efficiency Roll-off

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