Pander, Piotr Henryk and Swist, Agnieszka and Turczyn, Roman Maria and Pouget, Stéphanie and Djurado, David and Lazauskas, Algirdas and Pashazadeh, Ramin and Grazulevicius, Juozas Vidas and Motyka, Radoslaw and Klimash, Anastasia and Skabara, Peter and Data, Przemyslaw and Sołoducho, Jadwiga and Dias, Fernando B. (2018) 'Observation of dual room temperature fluorescence-phosphorescence in air, in the crystal form of a thianthrene derivative.', Journal of physical chemistry C., 122 (43). pp. 24958-24966.
Thianthrenes have been nearly forgotten as phosphors in recent years, but are now coming back, showing their strong potential in luminescent applications. Here, we present a comprehensive photophysical study of a carbazolyl derivative of thianthrene in different matrices and environments. The diffusion of oxygen is slowed down in the rigid environment of thianthrene organic crystals suppressing their phosphorescence quenching, as well as triplet-triplet annihilation. This facilitates the observation of simultaneous fluorescence and phosphorescence emissions at room temperature, in air, giving origin to strong white luminescence. Moreover, the color coordinates of the dual fluorescence-phosphorescence white emission, which is observed only in rigid amorphous media and in crystals, can be tuned.
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|Publisher Web site:||https://doi.org/10.1021/acs.jpcc.8b08329|
|Publisher statement:||This document is the Accepted Manuscript version of a Published Work that appeared in final form in The 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.8b08329.|
|Record Created:||15 Oct 2018 11:28|
|Last Modified:||09 Oct 2019 01:01|
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