Efficient near-infrared organic light-emitting diodes with emission from spin doublet excitons

Cho, Hwan-Hee; Gorgon, Sebastian; Londi, Giacomo; Giannini, Samuele; Cho, Changsoon; Ghosh, Pratyush; Tonnelé, Claire; Casanova, David; Olivier, Yoann; Baikie, Tomi K.; Li, Feng; Beljonne, David; Greenham, Neil C.; Friend, Richard H.; Evans, Emrys

doi:10.1038/s41566-024-01458-3

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Efficient near-infrared organic light-emitting diodes with emission from spin doublet excitons

Hwan-Hee Cho

, Sebastian Gorgon

, Giacomo Londi

, Samuele Giannini

, Changsoon Cho

, Pratyush Ghosh

, Claire Tonnelé

, David Casanova

, Yoann Olivier

, Tomi K. Baikie

, Feng Li

, David Beljonne

, Neil C. Greenham

, Richard H. Friend

, Emrys Evans

Nature Photonics

Swansea University Author: Emrys Evans

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DOI (Published version): 10.1038/s41566-024-01458-3

Abstract

The development of luminescent organic radicals has resulted in materials with excellent optical properties for near-infrared emission. Applications of light generation in this range span from bioimaging to surveillance. Although the unpaired electron arrangements of radicals enable efficient radiat...

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Published in:	Nature Photonics
ISSN:	1749-4885 1749-4893
Published:	Springer Science and Business Media LLC 2024
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URI:	https://cronfa.swan.ac.uk/Record/cronfa66524
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EP/M005143/1). E.W.E acknowledges funding from the Royal Society for a University Research Fellowship (URF/R1/201300) and the EPSRC grant no. EP/W018519/1. This project received funding from the ERC under the European Union’s Horizon 2020 research and innovation programme (grant agreement no. 101020167). H.-H.C. acknowledges the George and Lilian Schiff Foundation for PhD funding. P.G. acknowledges the support provided by the Cambridge Trust, George and Lilian Schiff Foundation, A. Rao, and St John’s College, Cambridge during the course of the research. The work in Namur and Mons was funded by the Belgian National Fund for Scientific Research (F.R.S.-FNRS) within the Consortium des Équipements de Calcul Intensif (CÉCI), under grant no. 2.5020.11, and by the Walloon Region (ZENOBE Tier-1 supercomputer) under grant no. 1117545. G.L. and Y.O. acknowledge funding from the F.R.S.-FNRS under grant no. F.4534.21 (MIS-IMAGINE). D.B. is a FNRS research director. The work at the DIPC was funded by the Spanish Government MICINN (project no. PID2019-109555GB-I00), the Gipuzkoa Provincial Council (project no. QUAN-000021-01), the European Union (project NextGenerationEU/PRTR-C17.I1), as well as by the IKUR Strategy under the collaboration agreement between Ikerbasque Foundation and DIPC on behalf of the Department of Education of the Basque Government. D.C and C.T. are thankful for the technical and human support provided by the Donostia International Physics Center (DIPC) Computer Center. C.T. is supported by DIPC and Gipuzkoa’s council joint program Women and Science. 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spelling	v2 66524 2024-05-29 Efficient near-infrared organic light-emitting diodes with emission from spin doublet excitons 538e217307dac24c9642ef1b03b41485 0000-0002-9092-3938 Emrys Evans Emrys Evans true false 2024-05-29 EAAS The development of luminescent organic radicals has resulted in materials with excellent optical properties for near-infrared emission. Applications of light generation in this range span from bioimaging to surveillance. Although the unpaired electron arrangements of radicals enable efficient radiative transitions within the doublet-spin manifold in organic light-emitting diodes, their performance is limited by non-radiative pathways introduced in electroluminescence. Here we present a host–guest design for organic light-emitting diodes that exploits energy transfer with up to 9.6% external quantum efficiency for 800 nm emission. The tris(2,4,6-trichlorophenyl)methyl-triphenyl-amine radical guest is energy-matched to the triplet state in a charge-transporting anthracene-derivative host. We show from optical spectroscopy and quantum-chemical modelling that reversible host–guest triplet–doublet energy transfer allows efficient harvesting of host triplet excitons. Journal Article Nature Photonics 0 Springer Science and Business Media LLC 1749-4885 1749-4893 19 6 2024 2024-06-19 10.1038/s41566-024-01458-3 COLLEGE NANME Engineering and Applied Sciences School COLLEGE CODE EAAS Swansea University SU Library paid the OA fee (TA Institutional Deal) This work was supported by the Engineering and Physical Sciences Research Council (EPSRC, grant no. EP/M005143/1). E.W.E acknowledges funding from the Royal Society for a University Research Fellowship (URF/R1/201300) and the EPSRC grant no. EP/W018519/1. This project received funding from the ERC under the European Union’s Horizon 2020 research and innovation programme (grant agreement no. 101020167). H.-H.C. acknowledges the George and Lilian Schiff Foundation for PhD funding. P.G. acknowledges the support provided by the Cambridge Trust, George and Lilian Schiff Foundation, A. Rao, and St John’s College, Cambridge during the course of the research. The work in Namur and Mons was funded by the Belgian National Fund for Scientific Research (F.R.S.-FNRS) within the Consortium des Équipements de Calcul Intensif (CÉCI), under grant no. 2.5020.11, and by the Walloon Region (ZENOBE Tier-1 supercomputer) under grant no. 1117545. G.L. and Y.O. acknowledge funding from the F.R.S.-FNRS under grant no. F.4534.21 (MIS-IMAGINE). D.B. is a FNRS research director. The work at the DIPC was funded by the Spanish Government MICINN (project no. PID2019-109555GB-I00), the Gipuzkoa Provincial Council (project no. QUAN-000021-01), the European Union (project NextGenerationEU/PRTR-C17.I1), as well as by the IKUR Strategy under the collaboration agreement between Ikerbasque Foundation and DIPC on behalf of the Department of Education of the Basque Government. D.C and C.T. are thankful for the technical and human support provided by the Donostia International Physics Center (DIPC) Computer Center. C.T. is supported by DIPC and Gipuzkoa’s council joint program Women and Science. F.L. is grateful for receiving financial support from the National Natural Science Foundation of China (grant no. 51925303). 2024-06-27T15:09:50.6866252 2024-05-29T10:44:48.0941455 Faculty of Science and Engineering School of Engineering and Applied Sciences - Chemistry Hwan-Hee Cho 0000-0002-2205-729x 1 Sebastian Gorgon 0000-0002-1361-1973 2 Giacomo Londi 0000-0001-7777-9161 3 Samuele Giannini 0000-0002-1094-3921 4 Changsoon Cho 0000-0002-2788-688x 5 Pratyush Ghosh 0000-0001-5780-3718 6 Claire Tonnelé 0000-0003-0791-8239 7 David Casanova 0000-0002-8893-7089 8 Yoann Olivier 0000-0003-2193-1536 9 Tomi K. Baikie 0000-0002-0845-167x 10 Feng Li 0000-0001-5236-3709 11 David Beljonne 0000-0001-5082-9990 12 Neil C. Greenham 0000-0002-2155-2432 13 Richard H. Friend 0000-0001-6565-6308 14 Emrys Evans 0000-0002-9092-3938 15 66524__30770__f9682f0223b34480bce4671ba25a2564.pdf 66524.VoR.pdf 2024-06-27T15:08:04.3343690 Output 1402593 application/pdf Version of Record true This article is licensed under a Creative Commons Attribution 4.0 International License. true eng http://creativecommons.org/licenses/by/4.0/
title	Efficient near-infrared organic light-emitting diodes with emission from spin doublet excitons
spellingShingle	Efficient near-infrared organic light-emitting diodes with emission from spin doublet excitons Emrys Evans
title_short	Efficient near-infrared organic light-emitting diodes with emission from spin doublet excitons
title_full	Efficient near-infrared organic light-emitting diodes with emission from spin doublet excitons
title_fullStr	Efficient near-infrared organic light-emitting diodes with emission from spin doublet excitons
title_full_unstemmed	Efficient near-infrared organic light-emitting diodes with emission from spin doublet excitons
title_sort	Efficient near-infrared organic light-emitting diodes with emission from spin doublet excitons
author_id_str_mv	538e217307dac24c9642ef1b03b41485
author_id_fullname_str_mv	538e217307dac24c9642ef1b03b41485_***_Emrys Evans
author	Emrys Evans
author2	Hwan-Hee Cho Sebastian Gorgon Giacomo Londi Samuele Giannini Changsoon Cho Pratyush Ghosh Claire Tonnelé David Casanova Yoann Olivier Tomi K. Baikie Feng Li David Beljonne Neil C. Greenham Richard H. Friend Emrys Evans
format	Journal article
container_title	Nature Photonics
container_volume	0
publishDate	2024
institution	Swansea University
issn	1749-4885 1749-4893
doi_str_mv	10.1038/s41566-024-01458-3
publisher	Springer Science and Business Media LLC
college_str	Faculty of Science and Engineering
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hierarchy_top_id	facultyofscienceandengineering
hierarchy_top_title	Faculty of Science and Engineering
hierarchy_parent_id	facultyofscienceandengineering
hierarchy_parent_title	Faculty of Science and Engineering
department_str	School of Engineering and Applied Sciences - Chemistry{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Engineering and Applied Sciences - Chemistry
document_store_str	1
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description	The development of luminescent organic radicals has resulted in materials with excellent optical properties for near-infrared emission. Applications of light generation in this range span from bioimaging to surveillance. Although the unpaired electron arrangements of radicals enable efficient radiative transitions within the doublet-spin manifold in organic light-emitting diodes, their performance is limited by non-radiative pathways introduced in electroluminescence. Here we present a host–guest design for organic light-emitting diodes that exploits energy transfer with up to 9.6% external quantum efficiency for 800 nm emission. The tris(2,4,6-trichlorophenyl)methyl-triphenyl-amine radical guest is energy-matched to the triplet state in a charge-transporting anthracene-derivative host. We show from optical spectroscopy and quantum-chemical modelling that reversible host–guest triplet–doublet energy transfer allows efficient harvesting of host triplet excitons.
published_date	2024-06-19T15:09:50Z
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Efficient near-infrared organic light-emitting diodes with emission from spin doublet excitons

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