The regioisomeric effect on the excited-state fate leading to room-temperature phosphorescence or thermally activated delayed fluorescence in a dibenzophenazine-cored donor-acceptor-donor system

Hosono, Takumi; Decarli, Nicolas Oliveira; Crocomo, Paola Zimmermann; Goya, Tsuyoshi; de Sousa, Leonardo Evaristo; Tohnai, Norimitsu; Minakata, Satoshi; de Silva, Piotr; Data, Przemyslaw; Takeda, Youhei

doi:https://doi.org/10.1039/D1TC05730H

The regioisomeric effect on the excited-state fate leading to room-temperature phosphorescence or thermally activated delayed fluorescence in a dibenzophenazine-cored donor-acceptor-donor system

Hosono, Takumi; Decarli, Nicolas Oliveira; Crocomo, Paola Zimmermann et al.

Journal of Materials Chemistry C, 2022, 10(12), 4905-4913

Number of Access:832（2025-07-27 08:52 Counts）

Identifier to cite or link to this item: https://hdl.handle.net/11094/98089

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Title	The regioisomeric effect on the excited-state fate leading to room-temperature phosphorescence or thermally activated delayed fluorescence in a dibenzophenazine-cored donor-acceptor-donor system
Creator	CreatorName Hosono, Takumi
	CreatorName Decarli, Nicolas Oliveira
	CreatorName Crocomo, Paola Zimmermann
	CreatorName Goya, Tsuyoshi
	CreatorName de Sousa, Leonardo Evaristo
	NRID 1000030346184 1000030346184 researchmap permalink read0089607 read0089607 Scopus Author ID 6701482198 6701482198 ORCID 0000-0001-7051-7599 0000-0001-7051-7599 CreatorName Tohnai, Norimitsu
	NRID 1000090273599 1000090273599 researchmap permalink read0185263 read0185263 Scopus Author ID 7003640913 7003640913 ORCID 0000-0001-9619-445X 0000-0001-9619-445X CreatorName Minakata, Satoshi
	CreatorName de Silva, Piotr
	CreatorName Data, Przemyslaw
	NRID 1000060608785 1000060608785 ORCID 0000-0001-9103-4238 0000-0001-9103-4238 researchmap permalink read0156438 read0156438 Scopus Author ID 12753487600 12753487600 CreatorName Takeda, Youhei
Description	Hosono T., Decarli N.O., Crocomo P.Z., et al. The regioisomeric effect on the excited-state fate leading to room-temperature phosphorescence or thermally activated delayed fluorescence in a dibenzophenazine-cored donor-acceptor-donor system. Journal of Materials Chemistry C 10, 4905 (2022); https://doi.org/10.1039/D1TC05730H.
Abstract	Exploring the design principle for switching between thermally activated delayed fluorescence (TADF) and room temperature phosphorescence (RTP) is a fundamentally important research to develop triplet-mediated photofunctional organic materials. Herein systematic studies on the regioisomeric and substituent effects in a twisted donor-acceptor-donor (D-A-D) molecular scaffold (A = dibenzo[a,j]phenazine; D = dihydrophenazasiline) on the fate of its excited state have been performed. The study revealed that regioisomerism clearly affects the emission behavior of the D-A-D compounds. Moreover, distinct differences in TADF, dual TADF & RTP, and dual RTP were observed, depending on the host used. Furthermore, organic light-emitting diodes (OLEDs) fabricated with the developed emitters achieved high external quantum efficiencies (EQEs) of up to 7.4% for RTP-based OLEDs.
Publisher	Royal Society of Chemistry
Source Title	Journal of Materials Chemistry C
Volume (Issue)	10(12)
Page	4905-4913
Date of Issued	2022-02-07
Language	English
Handle URL	https://hdl.handle.net/11094/98089
eISSN	20507534
Relation.isVersionOf	DOI (Publisher Version) https://doi.org/10.1039/D1TC05730H
Access Rights	open access
CopyRight	Reproduced from Journal of Materials Chemistry C. 2022, 10, 4905-4913 with permission from the Royal Society of Chemistry.
oaire:version	Accepted Manuscript
Category	学術雑誌論文 Journal Article

Resource Type	journal article
Local Type	Journal Article
DCTERMS.bibliographicCitation	Journal of Materials Chemistry C. 2022, 10(12), p. 4905-4913
DC.title	The regioisomeric effect on the excited-state fate leading to room-temperature phosphorescence or thermally activated delayed fluorescence in a dibenzophenazine-cored donor-acceptor-donor system
DC.creator	Hosono, Takumi
	Decarli, Nicolas Oliveira
	Crocomo, Paola Zimmermann
	Goya, Tsuyoshi
	de Sousa, Leonardo Evaristo
	Tohnai, Norimitsu
	Minakata, Satoshi
	de Silva, Piotr
	Data, Przemyslaw
	Takeda, Youhei
DC.publisher	Royal Society of Chemistry
DC.language' scheme='DCTERMS.RFC1766	English
DCTERMS.issued' scheme='DCTERMS.W3CDTF	2022-02-07
DC.identifier	https://doi.org/10.1039/D1TC05730H
DC.description	Hosono T., Decarli N.O., Crocomo P.Z., et al. The regioisomeric effect on the excited-state fate leading to room-temperature phosphorescence or thermally activated delayed fluorescence in a dibenzophenazine-cored donor-acceptor-donor system. Journal of Materials Chemistry C 10, 4905 (2022); https://doi.org/10.1039/D1TC05730H.
DCTERMS.abstract	Exploring the design principle for switching between thermally activated delayed fluorescence (TADF) and room temperature phosphorescence (RTP) is a fundamentally important research to develop triplet-mediated photofunctional organic materials. Herein systematic studies on the regioisomeric and substituent effects in a twisted donor-acceptor-donor (D-A-D) molecular scaffold (A = dibenzo[a,j]phenazine; D = dihydrophenazasiline) on the fate of its excited state have been performed. The study revealed that regioisomerism clearly affects the emission behavior of the D-A-D compounds. Moreover, distinct differences in TADF, dual TADF & RTP, and dual RTP were observed, depending on the host used. Furthermore, organic light-emitting diodes (OLEDs) fabricated with the developed emitters achieved high external quantum efficiencies (EQEs) of up to 7.4% for RTP-based OLEDs.
DC.rights	Reproduced from Journal of Materials Chemistry C. 2022, 10, 4905-4913 with permission from the Royal Society of Chemistry.
DC.format	98089
citation_title	The regioisomeric effect on the excited-state fate leading to room-temperature phosphorescence or thermally activated delayed fluorescence in a dibenzophenazine-cored donor-acceptor-donor system
citation_author	Hosono, Takumi
	Decarli, Nicolas Oliveira
	Crocomo, Paola Zimmermann
	Goya, Tsuyoshi
	de Sousa, Leonardo Evaristo
	Tohnai, Norimitsu
	Minakata, Satoshi
	de Silva, Piotr
	Data, Przemyslaw
	Takeda, Youhei
citation_publisher	Royal Society of Chemistry
citation_language	English
citation_date	2022-02-07
citation_journal_title	Journal of Materials Chemistry C
citation_volume	10
citation_issue	12
citation_firstpage	4905
citation_lastpage	4913
citation_doi	https://doi.org/10.1039/D1TC05730H
citation_public_url	https://hdl.handle.net/11094/98089

The regioisomeric effect on the excited-state fate leading to room-temperature phosphorescence or thermally activated delayed fluorescence in a dibenzophenazine-cored donor-acceptor-donor system

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