Revealing the Origin of Fast Delayed Fluorescence in a Donor Functionalized Bisterpyridine

Goll, Felix D.; Schelhorn, Andreas; Litvinas, Džiugas; Tenopala‐Carmona, Francisco; Kazak, Lev; Jelezko, Fedor; Lambert, Christoph; Gather, Malte C.; Kuehne, Alexander J. C.; Ziener, Ulrich

A new carbazole-substituted bisterpyridine with pronounced delayed fluorescence is presented. While the molecular donoracceptor-donor design suggests the origin of this to be thermally activated delayed fluorescence (TADF), results from various photophysical characterizations, OLED characteristics,temperature-dependent NMR spectroscopy, and DFT calculations all point against the involvement of triplet states. The molecule exhibits blue emission at about 440 […]

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