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Unravelling the electron injection/transport mechanism in organic light-emitting diodes
Although significant progress has been made in the development of light-emitting materials for organic light-emitting diodes along with the elucidation of emission mechanisms, the electron injection/transport mechanism remains unclear, and the materials used for electron injection/transport have bee...
Autores principales: | , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group UK
2021
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8113438/ https://www.ncbi.nlm.nih.gov/pubmed/33976196 http://dx.doi.org/10.1038/s41467-021-23067-2 |
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author | Sasaki, Tsubasa Hasegawa, Munehiro Inagaki, Kaito Ito, Hirokazu Suzuki, Kazuma Oono, Taku Morii, Katsuyuki Shimizu, Takahisa Fukagawa, Hirohiko |
author_facet | Sasaki, Tsubasa Hasegawa, Munehiro Inagaki, Kaito Ito, Hirokazu Suzuki, Kazuma Oono, Taku Morii, Katsuyuki Shimizu, Takahisa Fukagawa, Hirohiko |
author_sort | Sasaki, Tsubasa |
collection | PubMed |
description | Although significant progress has been made in the development of light-emitting materials for organic light-emitting diodes along with the elucidation of emission mechanisms, the electron injection/transport mechanism remains unclear, and the materials used for electron injection/transport have been basically unchanged for more than 20 years. Here, we unravelled the electron injection/transport mechanism by tuning the work function near the cathode to about 2.0 eV using a superbase. This extremely low-work function cathode allows direct electron injection into various materials, and it was found that organic materials can transport electrons independently of their molecular structure. On the basis of these findings, we have realised a simply structured blue organic light-emitting diode with an operational lifetime of more than 1,000,000 hours. Unravelling the electron injection/transport mechanism, as reported in this paper, not only greatly increases the choice of materials to be used for devices, but also allows simple device structures. |
format | Online Article Text |
id | pubmed-8113438 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2021 |
publisher | Nature Publishing Group UK |
record_format | MEDLINE/PubMed |
spelling | pubmed-81134382021-05-14 Unravelling the electron injection/transport mechanism in organic light-emitting diodes Sasaki, Tsubasa Hasegawa, Munehiro Inagaki, Kaito Ito, Hirokazu Suzuki, Kazuma Oono, Taku Morii, Katsuyuki Shimizu, Takahisa Fukagawa, Hirohiko Nat Commun Article Although significant progress has been made in the development of light-emitting materials for organic light-emitting diodes along with the elucidation of emission mechanisms, the electron injection/transport mechanism remains unclear, and the materials used for electron injection/transport have been basically unchanged for more than 20 years. Here, we unravelled the electron injection/transport mechanism by tuning the work function near the cathode to about 2.0 eV using a superbase. This extremely low-work function cathode allows direct electron injection into various materials, and it was found that organic materials can transport electrons independently of their molecular structure. On the basis of these findings, we have realised a simply structured blue organic light-emitting diode with an operational lifetime of more than 1,000,000 hours. Unravelling the electron injection/transport mechanism, as reported in this paper, not only greatly increases the choice of materials to be used for devices, but also allows simple device structures. Nature Publishing Group UK 2021-05-11 /pmc/articles/PMC8113438/ /pubmed/33976196 http://dx.doi.org/10.1038/s41467-021-23067-2 Text en © The Author(s) 2021 https://creativecommons.org/licenses/by/4.0/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/ (https://creativecommons.org/licenses/by/4.0/) . |
spellingShingle | Article Sasaki, Tsubasa Hasegawa, Munehiro Inagaki, Kaito Ito, Hirokazu Suzuki, Kazuma Oono, Taku Morii, Katsuyuki Shimizu, Takahisa Fukagawa, Hirohiko Unravelling the electron injection/transport mechanism in organic light-emitting diodes |
title | Unravelling the electron injection/transport mechanism in organic light-emitting diodes |
title_full | Unravelling the electron injection/transport mechanism in organic light-emitting diodes |
title_fullStr | Unravelling the electron injection/transport mechanism in organic light-emitting diodes |
title_full_unstemmed | Unravelling the electron injection/transport mechanism in organic light-emitting diodes |
title_short | Unravelling the electron injection/transport mechanism in organic light-emitting diodes |
title_sort | unravelling the electron injection/transport mechanism in organic light-emitting diodes |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8113438/ https://www.ncbi.nlm.nih.gov/pubmed/33976196 http://dx.doi.org/10.1038/s41467-021-23067-2 |
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