Multi-Colored Light-Emitting Electrochemical Cells Based on Thermal Activated Delayed Fluorescence Host

Light-emitting electrochemical cells (LECs) with the thermally activated delayed fluorescence(TADF) host and phosphorescent guests were fabricated using solution process. It is demonstrated for the first time that TADF, a well-known phenomenon that helps to increase electroluminescence efficiency by...

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Autores principales: Liu, Jiang, Oliva, Jorge, Tong, Kwing, Zhao, Fangchao, Chen, Dustin, Pei, Qibing
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2017
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5431554/
https://www.ncbi.nlm.nih.gov/pubmed/28484284
http://dx.doi.org/10.1038/s41598-017-01812-2
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author Liu, Jiang
Oliva, Jorge
Tong, Kwing
Zhao, Fangchao
Chen, Dustin
Pei, Qibing
author_facet Liu, Jiang
Oliva, Jorge
Tong, Kwing
Zhao, Fangchao
Chen, Dustin
Pei, Qibing
author_sort Liu, Jiang
collection PubMed
description Light-emitting electrochemical cells (LECs) with the thermally activated delayed fluorescence(TADF) host and phosphorescent guests were fabricated using solution process. It is demonstrated for the first time that TADF, a well-known phenomenon that helps to increase electroluminescence efficiency by harvesting excitons from triplet states, is used as a host in LECs. Devices with green, yellow, red and warm white emissions were fabricated, with the best devices showing more than 7000 cd/m(2) stable emission and a peak efficiency over 7 cd/A. Under high voltage stress, a burst of extremely high luminance of over 30,000 cd/m(2) was observed. All these LEC devices are extremely simple with only one active layer. Thus, our results could pave way to produce low- cost light source with high luminance, using TADF molecules.
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spelling pubmed-54315542017-05-16 Multi-Colored Light-Emitting Electrochemical Cells Based on Thermal Activated Delayed Fluorescence Host Liu, Jiang Oliva, Jorge Tong, Kwing Zhao, Fangchao Chen, Dustin Pei, Qibing Sci Rep Article Light-emitting electrochemical cells (LECs) with the thermally activated delayed fluorescence(TADF) host and phosphorescent guests were fabricated using solution process. It is demonstrated for the first time that TADF, a well-known phenomenon that helps to increase electroluminescence efficiency by harvesting excitons from triplet states, is used as a host in LECs. Devices with green, yellow, red and warm white emissions were fabricated, with the best devices showing more than 7000 cd/m(2) stable emission and a peak efficiency over 7 cd/A. Under high voltage stress, a burst of extremely high luminance of over 30,000 cd/m(2) was observed. All these LEC devices are extremely simple with only one active layer. Thus, our results could pave way to produce low- cost light source with high luminance, using TADF molecules. Nature Publishing Group UK 2017-05-08 /pmc/articles/PMC5431554/ /pubmed/28484284 http://dx.doi.org/10.1038/s41598-017-01812-2 Text en © The Author(s) 2017 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
spellingShingle Article
Liu, Jiang
Oliva, Jorge
Tong, Kwing
Zhao, Fangchao
Chen, Dustin
Pei, Qibing
Multi-Colored Light-Emitting Electrochemical Cells Based on Thermal Activated Delayed Fluorescence Host
title Multi-Colored Light-Emitting Electrochemical Cells Based on Thermal Activated Delayed Fluorescence Host
title_full Multi-Colored Light-Emitting Electrochemical Cells Based on Thermal Activated Delayed Fluorescence Host
title_fullStr Multi-Colored Light-Emitting Electrochemical Cells Based on Thermal Activated Delayed Fluorescence Host
title_full_unstemmed Multi-Colored Light-Emitting Electrochemical Cells Based on Thermal Activated Delayed Fluorescence Host
title_short Multi-Colored Light-Emitting Electrochemical Cells Based on Thermal Activated Delayed Fluorescence Host
title_sort multi-colored light-emitting electrochemical cells based on thermal activated delayed fluorescence host
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5431554/
https://www.ncbi.nlm.nih.gov/pubmed/28484284
http://dx.doi.org/10.1038/s41598-017-01812-2
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AT zhaofangchao multicoloredlightemittingelectrochemicalcellsbasedonthermalactivateddelayedfluorescencehost
AT chendustin multicoloredlightemittingelectrochemicalcellsbasedonthermalactivateddelayedfluorescencehost
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