Cargando…

Tröger’s Base-Derived Thermally Activated Delayed Fluorescence Dopant for Efficient Deep-Blue Organic Light-Emitting Diodes

The development of efficient deep-blue emitters with thermally activated delayed fluorescence (TADF) properties is a highly significant but challenging task in the field of organic light-emitting diode (OLED) applications. Herein, we report the design and synthesis of two new 4,10-dimethyl-6H,12H-5,...

Descripción completa

Detalles Bibliográficos
Autores principales: Wu, Ze-Ling, Lv, Xin, Meng, Ling-Yi, Chen, Xu-Lin, Lu, Can-Zhong
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10304498/
https://www.ncbi.nlm.nih.gov/pubmed/37375387
http://dx.doi.org/10.3390/molecules28124832
_version_ 1785065524002029568
author Wu, Ze-Ling
Lv, Xin
Meng, Ling-Yi
Chen, Xu-Lin
Lu, Can-Zhong
author_facet Wu, Ze-Ling
Lv, Xin
Meng, Ling-Yi
Chen, Xu-Lin
Lu, Can-Zhong
author_sort Wu, Ze-Ling
collection PubMed
description The development of efficient deep-blue emitters with thermally activated delayed fluorescence (TADF) properties is a highly significant but challenging task in the field of organic light-emitting diode (OLED) applications. Herein, we report the design and synthesis of two new 4,10-dimethyl-6H,12H-5,11-methanodibenzo[b,f][1,5]diazocine (TB)-derived TADF emitters, TB-BP-DMAC and TB-DMAC, which feature distinct benzophenone (BP)-derived acceptors but share the same dimethylacridin (DMAC) donors. Our comparative study reveals that the amide acceptor in TB-DMAC exhibits a significantly weaker electron-withdrawing ability in comparison to that of the typical benzophenone acceptor employed in TB-BP-DMAC. This disparity not only causes a noticeable blue shift in the emission from green to deep blue but also enhances the emission efficiency and the reverse intersystem crossing (RISC) process. As a result, TB-DMAC emits efficient deep-blue delay fluorescence with a photoluminescence quantum yield (PLQY) of 50.4% and a short lifetime of 2.28 μs in doped film. The doped and non-doped OLEDs based on TB-DMAC display efficient deep-blue electroluminescence with spectral peaks at 449 and 453 nm and maximum external quantum efficiencies (EQEs) of 6.1% and 5.7%, respectively. These findings indicate that substituted amide acceptors are a viable option for the design of high-performance deep-blue TADF materials.
format Online
Article
Text
id pubmed-10304498
institution National Center for Biotechnology Information
language English
publishDate 2023
publisher MDPI
record_format MEDLINE/PubMed
spelling pubmed-103044982023-06-29 Tröger’s Base-Derived Thermally Activated Delayed Fluorescence Dopant for Efficient Deep-Blue Organic Light-Emitting Diodes Wu, Ze-Ling Lv, Xin Meng, Ling-Yi Chen, Xu-Lin Lu, Can-Zhong Molecules Article The development of efficient deep-blue emitters with thermally activated delayed fluorescence (TADF) properties is a highly significant but challenging task in the field of organic light-emitting diode (OLED) applications. Herein, we report the design and synthesis of two new 4,10-dimethyl-6H,12H-5,11-methanodibenzo[b,f][1,5]diazocine (TB)-derived TADF emitters, TB-BP-DMAC and TB-DMAC, which feature distinct benzophenone (BP)-derived acceptors but share the same dimethylacridin (DMAC) donors. Our comparative study reveals that the amide acceptor in TB-DMAC exhibits a significantly weaker electron-withdrawing ability in comparison to that of the typical benzophenone acceptor employed in TB-BP-DMAC. This disparity not only causes a noticeable blue shift in the emission from green to deep blue but also enhances the emission efficiency and the reverse intersystem crossing (RISC) process. As a result, TB-DMAC emits efficient deep-blue delay fluorescence with a photoluminescence quantum yield (PLQY) of 50.4% and a short lifetime of 2.28 μs in doped film. The doped and non-doped OLEDs based on TB-DMAC display efficient deep-blue electroluminescence with spectral peaks at 449 and 453 nm and maximum external quantum efficiencies (EQEs) of 6.1% and 5.7%, respectively. These findings indicate that substituted amide acceptors are a viable option for the design of high-performance deep-blue TADF materials. MDPI 2023-06-17 /pmc/articles/PMC10304498/ /pubmed/37375387 http://dx.doi.org/10.3390/molecules28124832 Text en © 2023 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Wu, Ze-Ling
Lv, Xin
Meng, Ling-Yi
Chen, Xu-Lin
Lu, Can-Zhong
Tröger’s Base-Derived Thermally Activated Delayed Fluorescence Dopant for Efficient Deep-Blue Organic Light-Emitting Diodes
title Tröger’s Base-Derived Thermally Activated Delayed Fluorescence Dopant for Efficient Deep-Blue Organic Light-Emitting Diodes
title_full Tröger’s Base-Derived Thermally Activated Delayed Fluorescence Dopant for Efficient Deep-Blue Organic Light-Emitting Diodes
title_fullStr Tröger’s Base-Derived Thermally Activated Delayed Fluorescence Dopant for Efficient Deep-Blue Organic Light-Emitting Diodes
title_full_unstemmed Tröger’s Base-Derived Thermally Activated Delayed Fluorescence Dopant for Efficient Deep-Blue Organic Light-Emitting Diodes
title_short Tröger’s Base-Derived Thermally Activated Delayed Fluorescence Dopant for Efficient Deep-Blue Organic Light-Emitting Diodes
title_sort tröger’s base-derived thermally activated delayed fluorescence dopant for efficient deep-blue organic light-emitting diodes
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10304498/
https://www.ncbi.nlm.nih.gov/pubmed/37375387
http://dx.doi.org/10.3390/molecules28124832
work_keys_str_mv AT wuzeling trogersbasederivedthermallyactivateddelayedfluorescencedopantforefficientdeepblueorganiclightemittingdiodes
AT lvxin trogersbasederivedthermallyactivateddelayedfluorescencedopantforefficientdeepblueorganiclightemittingdiodes
AT menglingyi trogersbasederivedthermallyactivateddelayedfluorescencedopantforefficientdeepblueorganiclightemittingdiodes
AT chenxulin trogersbasederivedthermallyactivateddelayedfluorescencedopantforefficientdeepblueorganiclightemittingdiodes
AT lucanzhong trogersbasederivedthermallyactivateddelayedfluorescencedopantforefficientdeepblueorganiclightemittingdiodes