A low band gap polymer PBDPDP-DTP, with alternating benzodipyrrolidone (BDP) unit and dithienopyrrole, was synthesized and characterized. A PCE of 2.60%and a Voc of up to 0.74 V were realized in PSCs, which demonstrated the strong potential of BDP as the electron deficient unit in the design of donor–acceptor conjugated polymers for PSCs.
Yue, W., Huang, X., Yuan, J., Ma, W., Krebs, F. C., & Yu, D. (2013). A novel benzodipyrrolidone-based low band gap polymer for organic solar cells. Journal of Materials Chemistry A, 1, 10116-10119. https://doi.org/10.1039/c3ta12701j