Recent advances in regioregular polymerized small-molecule acceptors for high-performance all-polymer solar cells
Polymerized small molecular acceptors(PSMAs)have received increasing attention as they preserve the merits of fused ring small molecule acceptors(SMAs)and the good film-forming properties and light-irradiation stability of polymers.However,most of the PSMAs are regiorandom at present,which would not only negatively affect the batch-to-batch reproducibility of PSMAs,but also would disturbs the molecular configuration and electronic structure,and affect the intermolecular π-stacking,resulting in a significant decrease in its mobility.In recent years,researchers have designed and synthesized many regioregular PSMAs through strategies such as core engineering,terminal group engineering,linkage unit modulation and side chain engineering,and the power conversion efficiencies(PCEs)have been significantly improved.In this paper,the research progresses of regioregular PSMAs in high-performance all-polymer solar cells(all-PSCs)in recent years were reviewed.It was believed that in the future,higher PCE can be achieved through synthesis of new PSMAs with reasonable molecular structure design by strategies of core engineering,terminal group engineering,linkage unit modulation and side chain engineering together with appropriate donor materials and device process optimization.
all-polymer solar cellspolymerspolymerized small-molecule acceptorsregioregularpower conversion efficienciesrenewable energy
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