Lock-and-Key Exciplexes for Thermally Activated Delayed Fluorescence

Sébastien Rochat, Constantin-Christian Voll, Giorgios Markopoulos, Tony Wu, Matthew Welborn, Jens Engelhardt, Grace Han, Graham Sazama, Ting-An Lin, Troy Van Voorhis, Marc Baldo, Timothy Swager

Research output: Contribution to journalArticle (Academic Journal)peer-review


We combine synthetic supramolecular chemistry and materials science to develop novel exciplexes for thermally activated delayed fluorescence. Our approach starts from a bowl-shaped acceptor molecule for which we synthesize tailor-made donors that bind in a lock-and-key fashion. The donor design is guided by extensive density functional theory calculations of three independent donor families. The investigation of a large number of custom-synthesized donors allows us to derive empirical relationships for the prediction of the exciplex emission color. Incorporated within organic light-emitting devices, the lock-and-key exciplexes yield external quantum efficiencies of up to 5.4%, with potentially tunable emission color across the blue and green visible spectrum.
Original languageEnglish
JournalOrganic Materials
Publication statusPublished - 16 Jan 2020


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