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- Title
Highly Luminescent π-Conjugated Terpyridine Derivatives Exhibiting Thermally Activated Delayed Fluorescence.
- Authors
Sasabe, Hisahiro; Hayasaka, Yuya; Komatsu, Ryutaro; Nakao, Kohei; Kido, Junji
- Abstract
Typically, luminescent π-conjugated 2,2′:6′,2′′-terpyridine (tpy) derivatives are versatile components for tridentate metal ligands, supramolecular materials, two-photon absorption bioimaging probes, fluorescent ion sensors, and organic light-emitting devices. However, a limited number of luminescent tpy materials, other than metal complexes, have been reported. This study introduces a series of π-conjugated tpy derivatives that exhibit strong thermally activated delayed fluorescence (TADF). We have observed that a blue tpy emitter outperforms conventional fluorescent emitters. Additionally, a green tpy emitter has exhibited a performance that is almost comparable to that of its green phosphorescent counterparts, realizing an external quantum efficiency close to 25 % and a power efficiency exceeding 80 lm W−1 with an exceptionally low efficiency roll-off. This study demonstrates the first example of highly luminescent tpy-based TADF emitters.
- Subjects
DELAYED fluorescence; CHEMICAL derivatives; PHOSPHORS; ORGANIC light emitting diodes; QUANTUM efficiency; QUANTUM chemistry; OXIDATIVE coupling; METAL ions
- Publication
Chemistry - A European Journal, 2017, Vol 23, Issue 1, p114
- ISSN
0947-6539
- Publication type
Article
- DOI
10.1002/chem.201604303