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Multicolor luminescence switching and controllable thermally activated delayed fluorescence turn on/turn off in carbazole–quinoxaline–carbazole triads.

Pashazadeh, Ramin and Pander, Piotr and Lazauskas, Algirdas and Dias, Fernando B. and Grazulevicius, Juozas 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). pp. 1172-1177.

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.

Item Type:Article
Full text:(AM) Accepted Manuscript
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Status:Peer-reviewed
Publisher Web site:https://doi.org/10.1021/acs.jpclett.8b00136
Publisher 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
Date accepted:18 February 2018
Date deposited:20 March 2018
Date of first online publication:21 February 2018
Date first made open access:21 February 2019

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