biostudies-literatureUnknown9(72)Lee MWe 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), (<i>E</i>)-1,2-di(thiophen-2-yl)ethene (TVT), or dithieno[3,2-<i>b</i>:2',3'-<i>d</i>]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 (<i>λ</i> _max = 801-810 nm) than the peak of the PDPP2DT-F2T2 polymer (<i>λ</i> _max = 799 nm), which is associated with the high-RSC advances42096-42109https://www.ebi.ac.uk/biostudies/studies/S-EPMC9076513biostudies-literatureRegio-regular alternating diketopyrrolopyrrole-based D₁-A-D₂-A terpolymers for the enhanced performance of polymer solar cells.PMC9076513Kim TKim BCho HWKim JYLee MNguyen HVTLee KKChoi JHfalseRegio-regular alternating diketopyrrolopyrrole-based D₁-A-D₂-A terpolymers for the enhanced performance of polymer solar cells.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), (<i>E</i>)-1,2-di(thiophen-2-yl)ethene (TVT), or dithieno[3,2-<i>b</i>:2',3'-<i>d</i>]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 (<i>λ</i> _max = 801-810 nm) than the peak of the PDPP2DT-F2T2 polymer (<i>λ</i> _max = 799 nm), which is associated with the high-2019-01-01T00:00:00Z2019 Dec2025-04-04T14:22:26.765Z2024-11-06T23:38:49.855ZS-EPMC90765133554283310.1039/c9ra08858j