Cargando…
Predicting Operational Stability for Organic Light‐Emitting Diodes with Exciplex Cohosts
Organic light‐emitting diodes (OLEDs) employing exciplex cohosts have gained attractive interest due to the promising high efficiency, low driving voltage, and potential low cost in future solid‐state lighting sources and full‐color displays. However, their device lifetime is still the most challeng...
Autores principales: | , , , , , , |
---|---|
Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
John Wiley and Sons Inc.
2019
|
Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6446740/ https://www.ncbi.nlm.nih.gov/pubmed/30989033 http://dx.doi.org/10.1002/advs.201802246 |
_version_ | 1783408416023117824 |
---|---|
author | Wang, Zhiheng Li, Mengke Gan, Lin Cai, Xinyi Li, Binbin Chen, Dongcheng Su, Shi‐Jian |
author_facet | Wang, Zhiheng Li, Mengke Gan, Lin Cai, Xinyi Li, Binbin Chen, Dongcheng Su, Shi‐Jian |
author_sort | Wang, Zhiheng |
collection | PubMed |
description | Organic light‐emitting diodes (OLEDs) employing exciplex cohosts have gained attractive interest due to the promising high efficiency, low driving voltage, and potential low cost in future solid‐state lighting sources and full‐color displays. However, their device lifetime is still the most challenging weakness and rarely studied, which is regarded as a time consuming and complicated work. Therefore, a simplified but effective and comprehensive approach is demonstrated to give prediction for the exciplex cohosts operating lifespan and analyze their possible degradation mechanisms by considering molecular dissociated activation energy with internal exciton dynamics correlations. As a consequence, strong chemical bond stability for the hole transport moieties and rapid reactive exciton relaxation have the intrinsic talent to access potentially long‐lived exciplex cohosts, achieving an extended lifetime of 10169 h for the predicted long‐lived exciplex cohost OLEDs. Degradation behaviors further confirm that the deteriorated source is attributed to the formation of exciton quenchers and hole traps from excited states and charged‐excited states, respectively. The current findings establish a universal technique to screen the stable exciplex cohost candidates with economic time consumption and expenses. |
format | Online Article Text |
id | pubmed-6446740 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2019 |
publisher | John Wiley and Sons Inc. |
record_format | MEDLINE/PubMed |
spelling | pubmed-64467402019-04-15 Predicting Operational Stability for Organic Light‐Emitting Diodes with Exciplex Cohosts Wang, Zhiheng Li, Mengke Gan, Lin Cai, Xinyi Li, Binbin Chen, Dongcheng Su, Shi‐Jian Adv Sci (Weinh) Communications Organic light‐emitting diodes (OLEDs) employing exciplex cohosts have gained attractive interest due to the promising high efficiency, low driving voltage, and potential low cost in future solid‐state lighting sources and full‐color displays. However, their device lifetime is still the most challenging weakness and rarely studied, which is regarded as a time consuming and complicated work. Therefore, a simplified but effective and comprehensive approach is demonstrated to give prediction for the exciplex cohosts operating lifespan and analyze their possible degradation mechanisms by considering molecular dissociated activation energy with internal exciton dynamics correlations. As a consequence, strong chemical bond stability for the hole transport moieties and rapid reactive exciton relaxation have the intrinsic talent to access potentially long‐lived exciplex cohosts, achieving an extended lifetime of 10169 h for the predicted long‐lived exciplex cohost OLEDs. Degradation behaviors further confirm that the deteriorated source is attributed to the formation of exciton quenchers and hole traps from excited states and charged‐excited states, respectively. The current findings establish a universal technique to screen the stable exciplex cohost candidates with economic time consumption and expenses. John Wiley and Sons Inc. 2019-02-13 /pmc/articles/PMC6446740/ /pubmed/30989033 http://dx.doi.org/10.1002/advs.201802246 Text en © 2019 The Authors. Published by WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim This is an open access article under the terms of the http://creativecommons.org/licenses/by/4.0/ License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. |
spellingShingle | Communications Wang, Zhiheng Li, Mengke Gan, Lin Cai, Xinyi Li, Binbin Chen, Dongcheng Su, Shi‐Jian Predicting Operational Stability for Organic Light‐Emitting Diodes with Exciplex Cohosts |
title | Predicting Operational Stability for Organic Light‐Emitting Diodes with Exciplex Cohosts |
title_full | Predicting Operational Stability for Organic Light‐Emitting Diodes with Exciplex Cohosts |
title_fullStr | Predicting Operational Stability for Organic Light‐Emitting Diodes with Exciplex Cohosts |
title_full_unstemmed | Predicting Operational Stability for Organic Light‐Emitting Diodes with Exciplex Cohosts |
title_short | Predicting Operational Stability for Organic Light‐Emitting Diodes with Exciplex Cohosts |
title_sort | predicting operational stability for organic light‐emitting diodes with exciplex cohosts |
topic | Communications |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6446740/ https://www.ncbi.nlm.nih.gov/pubmed/30989033 http://dx.doi.org/10.1002/advs.201802246 |
work_keys_str_mv | AT wangzhiheng predictingoperationalstabilityfororganiclightemittingdiodeswithexciplexcohosts AT limengke predictingoperationalstabilityfororganiclightemittingdiodeswithexciplexcohosts AT ganlin predictingoperationalstabilityfororganiclightemittingdiodeswithexciplexcohosts AT caixinyi predictingoperationalstabilityfororganiclightemittingdiodeswithexciplexcohosts AT libinbin predictingoperationalstabilityfororganiclightemittingdiodeswithexciplexcohosts AT chendongcheng predictingoperationalstabilityfororganiclightemittingdiodeswithexciplexcohosts AT sushijian predictingoperationalstabilityfororganiclightemittingdiodeswithexciplexcohosts |