Regio-regular alternating diketopyrrolopyrrole-based D₁-A-D₂-A terpolymers for the enhanced performance of polymer solar cells.

ABSTRACT: We designed and synthesized regio-regular alternating diketopyrrolopyrrole (DPP)-based D₁-A-D₂-A terpolymers (PDPPF2T2DPP-T2, PDPPF2T2DPP-TVT, and PDPPF2T2DPP-DTT) using a primary donor (D₁) [3,3'-difluoro-2,2'-bithiophene (F2T2)] and a secondary donor (D₂) [2,2'-bithiophene (T2), (E)-1,2-di(thiophen-2-yl)ethene (TVT), or dithieno[3,2-b:2',3'-d]thiophene (DTT)]. A PDPP2DT-F2T2 D-A polymer was synthesized as well to compare optical, electronic, and photovoltaic properties. The absorption peaks of the terpolymers (PDPPF2T2DPP-T2, PDPPF2T2DPP-TVT, and PDPPF2T2DPP-DTT) were longer (λ _max = 801-810 nm) than the peak of the PDPP2DT-F2T2 polymer (λ _max = 799 nm), which is associated with the high-

SUBMITTER: Lee M 

PROVIDER: S-EPMC9076513 | biostudies-literature | 2019 Dec

REPOSITORIES: biostudies-literature