Cargando…
Pyrimidine-based twisted donor–acceptor delayed fluorescence molecules: a new universal platform for highly efficient blue electroluminescence
Deep-blue emitters that can harvest both singlet and triplet excited states to give high electron-to-photon conversion efficiencies are highly desired for applications in full-color displays and white lighting devices based on organic light-emitting diodes (OLEDs). Thermally activated delayed fluore...
Autores principales: | , , |
---|---|
Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Royal Society of Chemistry
2017
|
Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5354065/ https://www.ncbi.nlm.nih.gov/pubmed/28451232 http://dx.doi.org/10.1039/c6sc03793c |
_version_ | 1782515260439134208 |
---|---|
author | Park, In Seob Komiyama, Hideaki Yasuda, Takuma |
author_facet | Park, In Seob Komiyama, Hideaki Yasuda, Takuma |
author_sort | Park, In Seob |
collection | PubMed |
description | Deep-blue emitters that can harvest both singlet and triplet excited states to give high electron-to-photon conversion efficiencies are highly desired for applications in full-color displays and white lighting devices based on organic light-emitting diodes (OLEDs). Thermally activated delayed fluorescence (TADF) molecules based on highly twisted donor–acceptor (D–A) configurations are promising emitting dopants for the construction of efficient deep-blue OLEDs. In this study, a simple and versatile D–A system combining acridan-based donors and pyrimidine-based acceptors has been developed as a new platform for high-efficiency deep-blue TADF emitters. The designed pre-twisted acridan–pyrimidine D–A molecules exhibit small singlet–triplet energy splitting and high photoluminescence quantum yields, functioning as efficient deep-blue TADF emitters. The OLEDs utilizing these TADF emitters display bright blue electroluminescence with external quantum efficiencies of up to 20.4%, maximum current efficiencies of 41.7 cd A(–1), maximum power efficiencies of 37.2 lm W(–1), and color coordinates of (0.16, 0.23). The design strategy featuring such acridan–pyrimidine D–A motifs can offer great prospects for further developing high-performance deep-blue TADF emitters and TADF-OLEDs. |
format | Online Article Text |
id | pubmed-5354065 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2017 |
publisher | Royal Society of Chemistry |
record_format | MEDLINE/PubMed |
spelling | pubmed-53540652017-04-27 Pyrimidine-based twisted donor–acceptor delayed fluorescence molecules: a new universal platform for highly efficient blue electroluminescence Park, In Seob Komiyama, Hideaki Yasuda, Takuma Chem Sci Chemistry Deep-blue emitters that can harvest both singlet and triplet excited states to give high electron-to-photon conversion efficiencies are highly desired for applications in full-color displays and white lighting devices based on organic light-emitting diodes (OLEDs). Thermally activated delayed fluorescence (TADF) molecules based on highly twisted donor–acceptor (D–A) configurations are promising emitting dopants for the construction of efficient deep-blue OLEDs. In this study, a simple and versatile D–A system combining acridan-based donors and pyrimidine-based acceptors has been developed as a new platform for high-efficiency deep-blue TADF emitters. The designed pre-twisted acridan–pyrimidine D–A molecules exhibit small singlet–triplet energy splitting and high photoluminescence quantum yields, functioning as efficient deep-blue TADF emitters. The OLEDs utilizing these TADF emitters display bright blue electroluminescence with external quantum efficiencies of up to 20.4%, maximum current efficiencies of 41.7 cd A(–1), maximum power efficiencies of 37.2 lm W(–1), and color coordinates of (0.16, 0.23). The design strategy featuring such acridan–pyrimidine D–A motifs can offer great prospects for further developing high-performance deep-blue TADF emitters and TADF-OLEDs. Royal Society of Chemistry 2017-02-01 2016-09-26 /pmc/articles/PMC5354065/ /pubmed/28451232 http://dx.doi.org/10.1039/c6sc03793c Text en This journal is © The Royal Society of Chemistry 2016 http://creativecommons.org/licenses/by/3.0/ This is an Open Access article distributed under the terms of the Creative Commons Attribution 3.0 Unported License (http://creativecommons.org/licenses/by/3.0/) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. |
spellingShingle | Chemistry Park, In Seob Komiyama, Hideaki Yasuda, Takuma Pyrimidine-based twisted donor–acceptor delayed fluorescence molecules: a new universal platform for highly efficient blue electroluminescence |
title | Pyrimidine-based twisted donor–acceptor delayed fluorescence molecules: a new universal platform for highly efficient blue electroluminescence
|
title_full | Pyrimidine-based twisted donor–acceptor delayed fluorescence molecules: a new universal platform for highly efficient blue electroluminescence
|
title_fullStr | Pyrimidine-based twisted donor–acceptor delayed fluorescence molecules: a new universal platform for highly efficient blue electroluminescence
|
title_full_unstemmed | Pyrimidine-based twisted donor–acceptor delayed fluorescence molecules: a new universal platform for highly efficient blue electroluminescence
|
title_short | Pyrimidine-based twisted donor–acceptor delayed fluorescence molecules: a new universal platform for highly efficient blue electroluminescence
|
title_sort | pyrimidine-based twisted donor–acceptor delayed fluorescence molecules: a new universal platform for highly efficient blue electroluminescence |
topic | Chemistry |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5354065/ https://www.ncbi.nlm.nih.gov/pubmed/28451232 http://dx.doi.org/10.1039/c6sc03793c |
work_keys_str_mv | AT parkinseob pyrimidinebasedtwisteddonoracceptordelayedfluorescencemoleculesanewuniversalplatformforhighlyefficientblueelectroluminescence AT komiyamahideaki pyrimidinebasedtwisteddonoracceptordelayedfluorescencemoleculesanewuniversalplatformforhighlyefficientblueelectroluminescence AT yasudatakuma pyrimidinebasedtwisteddonoracceptordelayedfluorescencemoleculesanewuniversalplatformforhighlyefficientblueelectroluminescence |