Year

2018

Type(s)

Journal Article

Author(s)

Pander, P. and Motyka, R. and Zassowski, P. and Etherington, M.K. and Varsano, D. and Da Silva, T.J. and Caldas, M.J. and Data, P. and Monkman, A.P.

Source

Journal of Physical Chemistry C, 122(42): 23934—23942, 2018

Url

https://www.scopus.com/inward/record.uri?eid=2-s2.0-85054975572&doi=10.1021%2facs.jpcc.8b07610&partnerID=40&md5=27781a28c4a5f265be779cb23eb38875

BibTeX

BibTeX

BibTeX

@ARTICLE{Pander201823934, author={Pander, P. and Motyka, R. and Zassowski, P. and Etherington, M.K. and Varsano, D. and Da Silva, T.J. and Caldas, M.J. and Data, P. and Monkman, A.P.}, title={Thermally Activated Delayed Fluorescence Mediated through the Upper Triplet State Manifold in Non-Charge-Transfer Star-Shaped Triphenylamine-Carbazole Molecules}, journal={Journal of Physical Chemistry C}, year={2018}, volume={122}, number={42}, pages={23934-23942}, doi={10.1021/acs.jpcc.8b07610}, note={cited By 4}, url={https://www.scopus.com/inward/record.uri?eid=2-s2.0-85054975572&doi=10.1021%2facs.jpcc.8b07610&partnerID=40&md5=27781a28c4a5f265be779cb23eb38875}, affiliation={Department of Physics, Durham University, South Road, Durham, DH1 3LE, United Kingdom; Faculty of Chemistry, Silesian University of Technology, Ks. M. Strzody 9, Gliwice, 44-100, Poland; S3 Center, CNR Institute of Nanoscience, Modena, 41125, Italy; Institute of Physics, University of São Paulo, São Paulo, 05508-090, Brazil; Centre of Polymer and Carbon Materials, Polish Academy of Sciences, M. Curie-Sklodowskiej 34, Zabrze, 41-819, Poland}, abstract={Thermally activated delayed fluorescence has been found in a group of tricarbazolylamines that are purely electron-donating, non-charge-transfer (CT) molecules. We show that the reverse intersystem crossing step in these materials is mediated through upper triplet states. Reverse internal conversion is shown to be the thermally activated mechanism behind the triplet harvesting mechanism. The strongly mixed n-π∗/ π- π∗ character of the lowest energy optical transitions retains high oscillator strength and gives rise to high φPL. Organic light-emitting diode devices using these materials were fabricated to show very narrow (full width at half-maximum = 38-41 nm) electroluminescence spectra, clearly demonstrating the excitonic nature of the excited states. This new combination of physicochemical properties of a non-CT molecule yields thermally activated delayed fluorescence, but via a different, physical mechanism, reverse internal conversion delayed fluorescence. © 2018 American Chemical Society.}, keywords={Charge transfer; Molecules; Organic light emitting diodes (OLED); Quantum theory, Delayed fluorescence; Electroluminescence spectra; Inter-system crossings; Internal conversions; Oscillator strengths; Physicochemical property; Thermally activated delayed fluorescences; Thermally activated mechanisms, Fluorescence}, funding_details={Conselho Nacional de Desenvolvimento Científico e TecnológicoConselho Nacional de Desenvolvimento Científico e Tecnológico, CNPq}, funding_details={Narodowym Centrum NaukiNarodowym Centrum Nauki, NCN}, funding_details={Horizon 2020Horizon 2020}, funding_details={H2020-MSCA-IF-2014/659288, 674990, 641725}, funding_details={European CommissionEuropean Commission, EC, 676598}, funding_details={Partnership for Advanced Computing in Europe AISBLPartnership for Advanced Computing in Europe AISBL, PRACE}, funding_text 1={This work was funded in part by a research grant no. 2012/05/ B/ST5/00745 from National Science Centre, Poland. P.P. acknowledges the EU’s Horizon 2020 for funding the EXCILIGHT project under grant agreement no. 674990. P.D. acknowledges the EU’s Horizon 2020 for funding the H2020-MSCA-IF-2014/659288 project “TADFORCE”. M.K.E. acknowledges the EU’s Horizon 2020 for funding the PHEBE project under grant agreement no. 641725. M.J.C. acknowledges support from Brazilian agency CNPq. M.J.C. and T.J.S. acknowledge partial support from Brazilian Ministry of Science and Technology grant INCT-INEO, and University of Saõ Paulo research grant NAP-NN. 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Commun., 50, pp. 6174-6176}, correspondence_address1={Data, P.; Department of Physics, Durham University, South Road, United Kingdom; email: Przemyslaw.Data@durham.ac.uk}, publisher={American Chemical Society}, issn={19327447}, language={English}, abbrev_source_title={J. Phys. Chem. C}, document_type={Article}, source={Scopus},