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The influence of type-I and type-II triplet multiple quantum well structure on white organic light-emitting diodes

We demonstrate high-efficient white organic light-emitting diodes (WOLEDs) based on triplet multiple quantum well (MQW) structure and focus on the influence on WOLEDs through employing different potential barrier materials to form type-I and type-II MQWs, respectively. It is found that type-I MQW st...

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Autores principales: Zhao, Bo, Su, Zisheng, Li, Wenlian, Chu, Bei, Jin, Fangming, Yan, Xingwu, Zhang, Tianyou, Zhang, Feng, Fan, Di, Gao, Yuan, Wang, Junbo, Pi, Huachun, Zhu, Jianzhuo
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Springer 2013
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3867217/
https://www.ncbi.nlm.nih.gov/pubmed/24341599
http://dx.doi.org/10.1186/1556-276X-8-529
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author Zhao, Bo
Su, Zisheng
Li, Wenlian
Chu, Bei
Jin, Fangming
Yan, Xingwu
Zhang, Tianyou
Zhang, Feng
Fan, Di
Gao, Yuan
Wang, Junbo
Pi, Huachun
Zhu, Jianzhuo
author_facet Zhao, Bo
Su, Zisheng
Li, Wenlian
Chu, Bei
Jin, Fangming
Yan, Xingwu
Zhang, Tianyou
Zhang, Feng
Fan, Di
Gao, Yuan
Wang, Junbo
Pi, Huachun
Zhu, Jianzhuo
author_sort Zhao, Bo
collection PubMed
description We demonstrate high-efficient white organic light-emitting diodes (WOLEDs) based on triplet multiple quantum well (MQW) structure and focus on the influence on WOLEDs through employing different potential barrier materials to form type-I and type-II MQWs, respectively. It is found that type-I MQW structure WOLEDs based on 1,3,5-tris(N-phenyl-benzimidazol-2-yl)benzene as potential barrier layer (PBL) offers high electroluminescent (EL) performance. That is to say, maximum current efficiency and power efficiency are achieved at about 1,000 cd/m(2) with 16.4 cd/A and 8.3 lm/W, which increase by 53.3% and 50.9% over traditional three-layer structure WOLEDs, respectively, and a maximum luminance of 17,700 cd/m(2) is earned simultaneously. The achievement of high EL performance would be attributed to uniform distribution and better confinement of carriers within the emitting layer (EML). However, when 4,7-diphenyl-1,10-phenanthroline or 2,9-dimethyl-4,7-diphenyl-1,10-phenanthroline is used as PBL to form type-II MQW structure, poor EL performance is obtained. We attribute that to improper energy level alignment between the interface of EML/PBL, which leads to incomplete confinement and low recombination efficiency of carriers, a more detailed mechanism was argued.
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spelling pubmed-38672172013-12-19 The influence of type-I and type-II triplet multiple quantum well structure on white organic light-emitting diodes Zhao, Bo Su, Zisheng Li, Wenlian Chu, Bei Jin, Fangming Yan, Xingwu Zhang, Tianyou Zhang, Feng Fan, Di Gao, Yuan Wang, Junbo Pi, Huachun Zhu, Jianzhuo Nanoscale Res Lett Nano Express We demonstrate high-efficient white organic light-emitting diodes (WOLEDs) based on triplet multiple quantum well (MQW) structure and focus on the influence on WOLEDs through employing different potential barrier materials to form type-I and type-II MQWs, respectively. It is found that type-I MQW structure WOLEDs based on 1,3,5-tris(N-phenyl-benzimidazol-2-yl)benzene as potential barrier layer (PBL) offers high electroluminescent (EL) performance. That is to say, maximum current efficiency and power efficiency are achieved at about 1,000 cd/m(2) with 16.4 cd/A and 8.3 lm/W, which increase by 53.3% and 50.9% over traditional three-layer structure WOLEDs, respectively, and a maximum luminance of 17,700 cd/m(2) is earned simultaneously. The achievement of high EL performance would be attributed to uniform distribution and better confinement of carriers within the emitting layer (EML). However, when 4,7-diphenyl-1,10-phenanthroline or 2,9-dimethyl-4,7-diphenyl-1,10-phenanthroline is used as PBL to form type-II MQW structure, poor EL performance is obtained. We attribute that to improper energy level alignment between the interface of EML/PBL, which leads to incomplete confinement and low recombination efficiency of carriers, a more detailed mechanism was argued. Springer 2013-12-17 /pmc/articles/PMC3867217/ /pubmed/24341599 http://dx.doi.org/10.1186/1556-276X-8-529 Text en Copyright © 2013 Zhao et al.; licensee Springer. http://creativecommons.org/licenses/by/2.0 This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
spellingShingle Nano Express
Zhao, Bo
Su, Zisheng
Li, Wenlian
Chu, Bei
Jin, Fangming
Yan, Xingwu
Zhang, Tianyou
Zhang, Feng
Fan, Di
Gao, Yuan
Wang, Junbo
Pi, Huachun
Zhu, Jianzhuo
The influence of type-I and type-II triplet multiple quantum well structure on white organic light-emitting diodes
title The influence of type-I and type-II triplet multiple quantum well structure on white organic light-emitting diodes
title_full The influence of type-I and type-II triplet multiple quantum well structure on white organic light-emitting diodes
title_fullStr The influence of type-I and type-II triplet multiple quantum well structure on white organic light-emitting diodes
title_full_unstemmed The influence of type-I and type-II triplet multiple quantum well structure on white organic light-emitting diodes
title_short The influence of type-I and type-II triplet multiple quantum well structure on white organic light-emitting diodes
title_sort influence of type-i and type-ii triplet multiple quantum well structure on white organic light-emitting diodes
topic Nano Express
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3867217/
https://www.ncbi.nlm.nih.gov/pubmed/24341599
http://dx.doi.org/10.1186/1556-276X-8-529
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