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Kinetic modeling of transient photoluminescence from thermally activated delayed fluorescence.

Haase, Nils and Danos, Andrew and Pflumm, Christof and Morherr, Antonia and Stachelek, Patrycja and Mekic, Amel and Brütting, Wolfgang and Monkman, Andrew P. (2018) 'Kinetic modeling of transient photoluminescence from thermally activated delayed fluorescence.', Journal of physical chemistry C., 122 (51). pp. 29173-29179.

Abstract

A simplified state model and associated rate equations are used to extract the reverse intersystem crossing and other key rate constants from transient photoluminescence measurements of two high performance thermally activated delayed fluorescence materials. The values of the reverse intersystem crossing rate constant are in close agreement with established methods, but do not require a priori assumption of exponential decay kinetics, nor any additional steady state measurements. The model is also applied to measurements at different temperatures and found to reproduce previously reported thermal activation energies for the thermally activated delayed fluorescence process. Transient absorption measurements provide independent confirmation that triplet decay channels (neglected here) have no adverse effect on the fitting.

Item Type:Article
Full text:(AM) Accepted Manuscript
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Status:Peer-reviewed
Publisher Web site:https://doi.org/10.1021/acs.jpcc.8b11020
Publisher statement:This document is the Accepted Manuscript version of a Published Work that appeared in final form in Journal of physical chemistry C copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see https://doi.org/10.1021/acs.jpcc.8b11020
Date accepted:03 December 2018
Date deposited:08 January 2020
Date of first online publication:03 December 2018
Date first made open access:08 January 2020

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