A Direct Arylation Approach toward Thermally Activated Delayed Fluorescence-Active Benzo[<i>c</i>][1,2,5]thiadiazole Emitters for Near-Infrared Solution-Processed OLEDs.

ABSTRACT: An isomeric emitter (2TPA-iCNBT) is designed and synthesized, displaying enhanced thermally activated delayed fluorescence (TADF) properties as compared to the reference near-infrared (NIR) emitter TPACNBz (hereafter referred to as 2TPA-CNBT). Its modified benzo-[c]-[1,2,5]-thiadiazole-4,7-dicarbonitrile (iCNBT) acceptor (A) core positions the two triphenylamine (TPA) donor (D) units adjacently, thereby increasing the D-A torsion angle. Synthesis is realized through the use of an unexploited direct arylation strategy, which, besides offering the desired materials in an efficient and straightforward way, can also yield monofunctionalized emitters (1TPA-CNBT and 1TPA-iCNBT). In total, four emitters are synthesized, characterized, and subsequently com

SUBMITTER: Brebels S 

PROVIDER: S-EPMC12671064 | biostudies-literature | 2025 Nov

REPOSITORIES: biostudies-literature