Enhanced blue TADF in a D–A–D type naphthyridine derivative with an asymmetric carbazole-donor motif

Abstract

Efficient triplet-to-singlet conversion in conventional donor-acceptor TADF compounds relies on charge-transfer (CT) and locally-excited (LE) triplet state mixing as this provides required spin-orbit coupling. In this work, asymmetric carbazole-donor motif...

Synthetic progress of organic thermally activated delayed fluorescence emitters via C–H activation and functionalization

“…203 Building on these advancements, in 2022, Kazlauskas's group took advantage of the highly efficient synthetic method to access DCz and further prepared D-A, D-A-D (two same donors) and D-A-D* (two different donors) type blue-emissive TADF emitters (DCz-ND, DCz-ND-Cz and DCz-ND-DCz) with DCz as the common donor and naphthyridine as the common acceptor. 204 The intermolecular CÀH/ NÀH oxidation coupling in this study is a convenient synthetic method for the construction of a twisted donor motif that is suitable for designing TADF emitters.…”

A spiroacridine-based thermally activated delayed fluorescence emitter for high-efficiency and narrow-band deep-blue OLEDs

“…Note that most TADF-OLED devices with l EL in the range of 455-465 nm have a CIE y value greater than 0.15. 20,27,28 Thus, the lower CIE y value of the SAC-BOC-based device is primarily attributed to its narrow-band emission (FWHM = 57 nm) through reasonable molecular design. Nonetheless, the relatively severe efficiency roll-off of the device could be observed, which is ascribed to the relatively slow RISC process.…”