Polymerized small molecule acceptor based on diketopyrrolopyrrole and IDIC double electron-withdrawing building block for all-polymer solar cells

Polymerization of small molecule acceptors (PSMAs) has been proved to be an effective strategy to design polymer acceptors. DPP-based PSMAs of P(IDIC-2TDPPEh) employing double electron-withdrawing building block IDIC and thiophene-flanked diketopyrrolopyrrole were well designed and prepared. The all-polymer solar cells employed P(IDIC-2TDPPEh) as acceptor and PBDB-T as donor performed a PCE of 1.57%. This work highly broadens the potential applications of DPP-based PSMAs in the fields of organic electronics.