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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...
Autores principales: | , , , , , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Springer
2013
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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. |
format | Online Article Text |
id | pubmed-3867217 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2013 |
publisher | Springer |
record_format | MEDLINE/PubMed |
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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