Kinetic Modeling of Transient Photoluminescence from Thermally Activated Delayed Fluorescence

Haase, Nils; Danos, Andrew; Pflumm, Christof; Morherr, Antonia; Stachelek, Patrycja; Mekic, Amel; Brütting, Wolfgang; Monkman, Andrew P.

doi:10.1021/acs.jpcc.8b11020

Kinetic Modeling of Transient Photoluminescence from Thermally Activated Delayed Fluorescence

Haase, Nils; Danos, Andrew; Pflumm, Christof; Morherr, Antonia; Stachelek, Patrycja; Mekic, Amel; Brütting, Wolfgang; Monkman, Andrew P.

Authors

Nils Haase

Dr Andrew Danos andrew.danos@durham.ac.uk
Senior Experimental Officer

Christof Pflumm

Antonia Morherr

Patrycja Stachelek

Amel Mekic

Wolfgang Brütting

Andrew P. Monkman

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.

Citation

Haase, N., Danos, A., Pflumm, C., Morherr, A., Stachelek, P., Mekic, A., …Monkman, A. P. (2018). Kinetic Modeling of Transient Photoluminescence from Thermally Activated Delayed Fluorescence. Journal of Physical Chemistry C, 122(51), 29173-29179. https://doi.org/10.1021/acs.jpcc.8b11020

Journal Article Type	Article
Acceptance Date	Dec 3, 2018
Online Publication Date	Dec 3, 2018
Publication Date	Dec 27, 2018
Deposit Date	Jan 8, 2020
Publicly Available Date	Jan 8, 2020
Journal	Journal of Physical Chemistry C
Print ISSN	1932-7447
Electronic ISSN	1932-7455
Publisher	American Chemical Society
Peer Reviewed	Peer Reviewed
Volume	122
Issue	51
Pages	29173-29179
DOI	https://doi.org/10.1021/acs.jpcc.8b11020

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Copyright 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