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Highly efficient organic light emitting diodes formed by solution processed red emitters with evaporated blue common layer structure

We prepared highly-efficient solution-processed red phosphorescent organic light emitting diodes (PHOLEDs) with a blue common layer structure that can reasonably confine the triplet excitons inside of the red emission layer (EML) with the assistance of a bipolar exciton blocking layer. The red PHOLE...

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Autores principales: Cho, Ye Ram, Kim, Hyung Suk, Yu, Young-Jun, Suh, Min Chul
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group 2015
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4626861/
https://www.ncbi.nlm.nih.gov/pubmed/26514274
http://dx.doi.org/10.1038/srep15903
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author Cho, Ye Ram
Kim, Hyung Suk
Yu, Young-Jun
Suh, Min Chul
author_facet Cho, Ye Ram
Kim, Hyung Suk
Yu, Young-Jun
Suh, Min Chul
author_sort Cho, Ye Ram
collection PubMed
description We prepared highly-efficient solution-processed red phosphorescent organic light emitting diodes (PHOLEDs) with a blue common layer structure that can reasonably confine the triplet excitons inside of the red emission layer (EML) with the assistance of a bipolar exciton blocking layer. The red PHOLEDs containing EML with a 7 : 3 ratio of 11-(4,6-diphenyl-[1,3,5]triazin-2-yl)-12-phenyl-11,12-dihydro-11,12-diaza-indeno[2,1-a]fluorene (n-type host, NH) : 4-(3-(triphenylen-2-yl)phenyl)dibenzo[b,d]thiophene (p-type host, PH) doped with 5% Iridium(III) bis(2-(3,5-dimethylphenyl)quinolinato-N,C2’)tetramethylheptadionate (Red Dopant, RD) produced the highest current and power efficiencies at 23.4 cd/A and 13.6 lm/W, with a 19% external quantum efficiency at 1000 cd/m(2). To the best of our knowledge, such efficiency was the best among those that have been obtained from solution-processed small molecular red PHOLEDs. In addition, the host molecules utilized in this study have no flexible spacers, such as an alkyl chain, which normally deteriorate the stability of the device.
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spelling pubmed-46268612015-11-03 Highly efficient organic light emitting diodes formed by solution processed red emitters with evaporated blue common layer structure Cho, Ye Ram Kim, Hyung Suk Yu, Young-Jun Suh, Min Chul Sci Rep Article We prepared highly-efficient solution-processed red phosphorescent organic light emitting diodes (PHOLEDs) with a blue common layer structure that can reasonably confine the triplet excitons inside of the red emission layer (EML) with the assistance of a bipolar exciton blocking layer. The red PHOLEDs containing EML with a 7 : 3 ratio of 11-(4,6-diphenyl-[1,3,5]triazin-2-yl)-12-phenyl-11,12-dihydro-11,12-diaza-indeno[2,1-a]fluorene (n-type host, NH) : 4-(3-(triphenylen-2-yl)phenyl)dibenzo[b,d]thiophene (p-type host, PH) doped with 5% Iridium(III) bis(2-(3,5-dimethylphenyl)quinolinato-N,C2’)tetramethylheptadionate (Red Dopant, RD) produced the highest current and power efficiencies at 23.4 cd/A and 13.6 lm/W, with a 19% external quantum efficiency at 1000 cd/m(2). To the best of our knowledge, such efficiency was the best among those that have been obtained from solution-processed small molecular red PHOLEDs. In addition, the host molecules utilized in this study have no flexible spacers, such as an alkyl chain, which normally deteriorate the stability of the device. Nature Publishing Group 2015-10-30 /pmc/articles/PMC4626861/ /pubmed/26514274 http://dx.doi.org/10.1038/srep15903 Text en Copyright © 2015, Macmillan Publishers Limited http://creativecommons.org/licenses/by/4.0/ This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/
spellingShingle Article
Cho, Ye Ram
Kim, Hyung Suk
Yu, Young-Jun
Suh, Min Chul
Highly efficient organic light emitting diodes formed by solution processed red emitters with evaporated blue common layer structure
title Highly efficient organic light emitting diodes formed by solution processed red emitters with evaporated blue common layer structure
title_full Highly efficient organic light emitting diodes formed by solution processed red emitters with evaporated blue common layer structure
title_fullStr Highly efficient organic light emitting diodes formed by solution processed red emitters with evaporated blue common layer structure
title_full_unstemmed Highly efficient organic light emitting diodes formed by solution processed red emitters with evaporated blue common layer structure
title_short Highly efficient organic light emitting diodes formed by solution processed red emitters with evaporated blue common layer structure
title_sort highly efficient organic light emitting diodes formed by solution processed red emitters with evaporated blue common layer structure
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4626861/
https://www.ncbi.nlm.nih.gov/pubmed/26514274
http://dx.doi.org/10.1038/srep15903
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