Chalcogenopheno[3,2-b]pyrrole, including thieno[3,2-b]pyrrole (TP), furo[3,2-b]pyrrole (FP), and selenopheno[3,2-b]pyrrole (SeP), has been studied as donor moieties coupled with benzo[<i>c</i>][1,2,5]thiadiazole (BT) based acceptor in small molecules and applied on organic field-effect transistors (OFETs). However, a systematic investigation of the performance of chalcogenopheno[3,2-b]pyrrole containing molecules is limited. In this study, we systematically designed, synthesized, and characterized four new donor-acceptor-donor (DAD) small molecules which contain three chalcogenopheno[3,2-b]pyrroles and thieno[3,2-b]thiophene (TT) as donor and diketopyrrolopyrrole (DPP) as acceptor. TT containing molecule was designed as a reference due to the similar bicyclic aromatic structure compared to chalcogenopheno[3,2-b]pyrrole and its utilization in organic semiconductors. Optoelectronic properties, thermal analysis, and OFETs application of four molecules were investigated. All molecules showed OFETs activity with maximum hole mobility at lower annealing temperatures. All three chalcogenopheno[3,2-b]pyrrole containing molecules showed better performance in OFETs compared to TT containing molecule, and FP containing molecule showed the highest mobility among these molecules. The result of this work instills confidence for further studies to replace thieno[3,2-b]thiophene with chalcogenopheno[3,2-b]pyrrole in conjugated polymers.

Systematic investigation of chalcogenopheno[3,2-b]pyrrole containing small molecules for organic field-effect transistors

Fall 2022 abstracts, posters, and presentations will launch in mid-September.

ACS Fall 2022

The official archive and repository for all ACS Meetings & Expositions abstracts and select posters or presentations.