Synthesis and photovoltaic properties of D-π-A type polymers containing the oxadiazole side chains of diketopyrrolopyrrole(DPP) acceptor central unit with different donor units
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After the first report in 2008, the polymer photovoltaic materials based on diketopyrrole (DPP) were studied in depth. Moreover, polymers based on DPP can also be transformed into electron acceptor materials through wise structural modification, and some exciting progress has been made recently. For example, the changes of donor receptor structural units, the types of alkyl substituents and conjugated bridges, and the end-capped groups were studied. In this paper, we investigate whether different donor units (TVT, DTT) can improve The power conversion efficiencies(PCEs) in the case of diketopyrrolopyrrole (DPP) - based conjugated polymers with oxadiazole side chains. The best power conversion efficiency was obtained from PADPPOXA-TVT (0.540%) and PADPPOXA-DTT (0.173%) respectively.