Candle light-style OLEDs with benzochalcogenadiazoles cores

Korshunov, V.M.; Chmovzh, T.N.; Golovanov, I.S.; Knyazeva, E.A.; Mikhalchenko, L.V.; Saifutyarov, R.S.; Avetisov, I.C.; Woollins, J.D.; Taydakov, I.V.; Rakitin, O.A.

Статья опубликована в высокорейтинговом журнале

Информация о цитировании статьи получена из Web of Science, Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 1 февраля 2021 г.

Авторы: Korshunov Vladislav M., Chmovzh Timofey N., Golovanov Ivan S., Knyazeva Ekaterina A., Mikhalchenko Lyudmila V., Saifutyarov Rasim S., Avetisov Igor C., Woollins J.Derek, Taydakov Ilya V., Rakitin Oleg A.
Журнал: Dyes and Pigments
Том: 185
Год издания: 2021
Издательство: Elsevier BV
Местоположение издательства: Netherlands
Номер статьи: 108917
DOI: 10.1016/j.dyepig.2020.108917
Аннотация: Fluorescent D-A1-π-A2 dyes containing the 9-hexyl-9H-carbazole electron-donor unit and 2,1,3-benzochalcogenadiazolesas electron-withdrawing, were synthesized. These dyes displayed high luminescence quantum yields up to 20% in the solid phase and 80% in solutions. A series of ClsOLEDs with high luminance up to 6256 cd/m2 and low color temperature (1800–1900 K) based on these dyes were constructed. The electroluminescence color temperature of the fabricated OLEDs is independent of the operating voltage making these compounds potentially very useful for night time illumination. It was shown that the aggregation process of the investigated dyes led to the formation of planar crystalline structures. Scanning electron microscopy (SEM) and fluorescence lifetime imaging (FLIM) experiments, showed that luminescence quenching caused by interactions betweenaggregates of different sizes takes place. Spectroscopic studies were supported by Density Functional Theory (DFT) and Time Dependent Density Functional Theory (TD-DFT) calculations. As a result, we elucidated thatreplacement of [1,2,5]chalcogenadiazolo[3,4-c]pyridines by 2,1,3-benzochalcogenadiazoles led to a substantial improvement in intramolecular charge transfer (ICT) from the donor to acceptor units due to favourabledistortion of the excited state geometry.
Добавил в систему: Аветисов Игорь Христофорович

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Candle light-style OLEDs with benzochalcogenadiazoles coresстатья

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