Adjusting the photovoltaic performance of big fused ring-based small molecules by tailoring with different modifications.

ABSTRACT: Three novel A-D-A type small-molecule donor materials, namely AAN-DPP₂, AAN(T-DPP)₂ and AANT(T-DPP)₂, with anthanthrene (AAN) as the electron-donating core, diketopyrrolopyrrole (DPP) as the electron-accepting moiety, and thiophene as π-bridge units, have been designed and synthesized for application in bulk-heterojunction (BHJ) organic solar cells (OSCs). Compared to AAN-DPP₂, devices based on AAN(T-DPP)₂ and AANT(T-DPP)₂ show better photovoltaic performance due to broader absorption and better planarity of the molecular backbone. A maximum power conversion efficiency (PCE) of 2.33% with a short-circuit current density (J _sc) of 6.82 mA cm^-2 and a fill factor (FF) of 39.80 was obtained in the AA

SUBMITTER: Li M 

PROVIDER: S-EPMC9044804 | biostudies-literature | 2021 Dec

REPOSITORIES: biostudies-literature