In:
Chemistry – A European Journal, Wiley, Vol. 28, No. 72 ( 2022-12-27)
Abstract:
Narrowband deep blue thermally activated delayed fluorescent (TADF) materials have attracted significant attention. Herein, four asymmetrical structured TADF emitters based on diphenylsulfone (DPS) acceptor and 9,9‐dimethyl‐9,10‐dihydroacridine (DMAC) donor with progressive performances were developed. The tert ‐butyloxy auxiliary electron‐donor was adopted to restrict the intramolecular rotations and provide efficient steric hindrance. Regioisomerization by altering the substitution position of DMAC on DPS unit further enhanced the intra‐ and inter‐molecular interactions. The accompanying effects yielded increased energy level, minimized reorganization energy, and inhibited non‐radiative transitions in the crystals of t BuO‐SO m AD , which achieved narrowband deep‐blue emission peaking at 424 nm (FWHM=64 nm, Φ F =33.6 %) through aggregation‐induced, blue‐shifted emission (AIBSE). In addition, deep‐blue organic light emitting diodes (OLEDs) based on t BuO‐SO m AD realized the electroluminescence (EL) spectrum peaking located at 435 nm and CIE coordination of (0.12, 0.09).
Type of Medium:
Online Resource
ISSN:
0947-6539
,
1521-3765
DOI:
10.1002/chem.202202434
Language:
English
Publisher:
Wiley
Publication Date:
2022
detail.hit.zdb_id:
1478547-X
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