Multicolor Luminescence Switching and Controllable Thermally Activated Delayed Fluorescence Turn on/Turn off in Carbazole–Quinoxaline–Carbazole Triads

Pashazadeh, Ramin; Pander, Piotr; Lazauskas, Algirdas; Dias, Fernando B.; Grazulevicius, Juozas V.

doi:10.1021/acs.jpclett.8b00136

Multicolor Luminescence Switching and Controllable Thermally Activated Delayed Fluorescence Turn on/Turn off in Carbazole–Quinoxaline–Carbazole Triads

Pashazadeh, Ramin; Pander, Piotr; Lazauskas, Algirdas; Dias, Fernando B.; Grazulevicius, Juozas V.

Authors

Ramin Pashazadeh

Piotr Pander piotr.h.pander@durham.ac.uk
Academic Visitor

Algirdas Lazauskas

Dr Fernando Dias f.m.b.dias@durham.ac.uk
Associate Professor

Juozas V. Grazulevicius

Abstract

We report a series of thermally activated delayed fluorescence (TADF) molecules with mechanochromic luminescence properties and reversible TADF turn on/off properties in solid state that are induced by the transition between amorphous and crystalline states. Additionally, multicolor altering through external stimulus is demonstrated. All of the studied compounds exhibited recovery of the initial states associated with narrower emission spectra. TADF organic light-emitting diodes fabricated by solution processing rendered high external quantum efficiency up to 10.9% and luminance of 16 760 cd m–2.

Citation

Pashazadeh, R., Pander, P., Lazauskas, A., Dias, F. B., & Grazulevicius, J. V. (2018). Multicolor Luminescence Switching and Controllable Thermally Activated Delayed Fluorescence Turn on/Turn off in Carbazole–Quinoxaline–Carbazole Triads. Journal of Physical Chemistry Letters, 9(5), 1172-1177. https://doi.org/10.1021/acs.jpclett.8b00136

Journal Article Type	Article
Acceptance Date	Feb 18, 2018
Online Publication Date	Feb 21, 2018
Publication Date	Mar 1, 2018
Deposit Date	Mar 7, 2018
Publicly Available Date	Feb 19, 2019
Journal	Journal of Physical Chemistry Letters
Publisher	American Chemical Society
Peer Reviewed	Peer Reviewed
Volume	9
Issue	5
Pages	1172-1177
DOI	https://doi.org/10.1021/acs.jpclett.8b00136

Files

Accepted Journal Article (602 Kb)
PDF

Copyright Statement
This document is the Accepted Manuscript version of a Published Work that appeared in final form in The Journal of Physical Chemical Letters 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.jpclett.8b00136