High Triplet Energy Host Materials for Blue TADF OLEDs-A Tool Box Approach.
TADF
high triplet energy
host
organic light emitting diode
thermally activated delayed fluorescence
tool box approach
Journal
Frontiers in chemistry
ISSN: 2296-2646
Titre abrégé: Front Chem
Pays: Switzerland
ID NLM: 101627988
Informations de publication
Date de publication:
2020
2020
Historique:
received:
22
02
2020
accepted:
23
06
2020
entrez:
28
8
2020
pubmed:
28
8
2020
medline:
28
8
2020
Statut:
epublish
Résumé
The synthesis of stable blue TADF emitters and the corresponding matrix materials is one of the biggest challenges in the development of novel OLED materials. We present six bipolar host materials based on triazine as an acceptor and two types of donors, namely, carbazole, and acridine. Using a tool box approach, the chemical structure of the materials is changed in a systematic way. Both the carbazole and acridine donor are connected to the triazine acceptor via a para- or a meta-linked phenyl ring or are linked directly to each other. The photophysics of the materials has been investigated in detail by absorption-, fluorescence-, and phosphorescence spectroscopy in solution. In addition, a number of DFT calculations have been made which result in a deeper understanding of the photophysics. The presence of a phenyl bridge between donor and acceptor cores leads to a considerable decrease of the triplet energy due to extension of the overlap electron and hole orbitals over the triazine-phenyl core of the molecule. This decrease is more pronounced for the para-phenylene than for the meta-phenylene linker. Only direct connection of the donor group to the triazine core provides a high energy of the triplet state of 2.97 eV for the carbazole derivative
Identifiants
pubmed: 32850669
doi: 10.3389/fchem.2020.00657
pmc: PMC7403631
doi:
Types de publication
Journal Article
Langues
eng
Pagination
657Informations de copyright
Copyright © 2020 Rodella, Bagnich, Duda, Meier, Kahle, Athanasopoulos, Köhler and Strohriegl.
Références
J Am Chem Soc. 2017 Feb 1;139(4):1699-1704
pubmed: 28068763
Adv Mater. 2016 Apr 13;28(14):2777-81
pubmed: 26865384
Chem Sci. 2019 May 29;10(27):6689-6696
pubmed: 31367323
Adv Mater. 2016 Jan 20;28(3):479-85
pubmed: 26588189
Angew Chem Int Ed Engl. 2016 Jun 6;55(24):6864-8
pubmed: 27101424
J Phys Chem A. 2005 Jun 30;109(25):5656-67
pubmed: 16833898
Philos Trans A Math Phys Eng Sci. 2015 Jun 28;373(2044):
pubmed: 25987578
Angew Chem Int Ed Engl. 2017 Feb 1;56(6):1571-1575
pubmed: 28035781
Chemistry. 2011 May 16;17(21):5800-3
pubmed: 21503995
Macromol Rapid Commun. 2019 Jan;40(1):e1800570
pubmed: 30240066
Nat Mater. 2015 Mar;14(3):330-6
pubmed: 25485987
Adv Mater. 2016 Aug;28(32):6976-83
pubmed: 27271917
Nature. 2012 Dec 13;492(7428):234-8
pubmed: 23235877
J Chem Theory Comput. 2011 Nov 8;7(11):3578-85
pubmed: 26598256
Adv Mater. 2015 Apr 17;27(15):2515-20
pubmed: 25757226
Chemistry. 2011 Sep 19;17(39):10871-8
pubmed: 21887832
ACS Appl Mater Interfaces. 2019 Jan 30;11(4):4185-4192
pubmed: 30607931
J Phys Chem Lett. 2017 Dec 21;8(24):6199-6205
pubmed: 29227664
Nat Mater. 2015 Jul;14(7):685-90
pubmed: 25849370
Chem Asian J. 2015 Jun;10(6):1402-9
pubmed: 25871535
Chem Rec. 2016 Feb;16(1):159-72
pubmed: 26593740
Phys Chem Chem Phys. 2008 Nov 28;10(44):6615-20
pubmed: 18989472
J Chem Theory Comput. 2015 Aug 11;11(8):3851-8
pubmed: 26574466
Annu Rev Phys Chem. 2016 May 27;67:113-33
pubmed: 26980308
J Am Chem Soc. 2004 May 19;126(19):6035-42
pubmed: 15137768
Adv Mater. 2017 Jun;29(22):
pubmed: 28256751