In recent years,conjugated polymers have attracted great attention in the application as photovoltaic donor materials in polymer solar cells(PSCs).Broad absorption,lower-energy bandgap,higher hole mobility,relatively ...In recent years,conjugated polymers have attracted great attention in the application as photovoltaic donor materials in polymer solar cells(PSCs).Broad absorption,lower-energy bandgap,higher hole mobility,relatively lower HOMO energy levels,and higher solubility are important for the conjugated polymer donor materials to achieve high photovoltaic performance.Side-chain engineering plays a very important role in optimizing the physicochemical properties of the conjugated polymers.In this article,we review recent progress on the side-chain engineering of conjugated polymer donor materials,including the optimization of flexible side-chains for balancing solubility and intermolecular packing(aggregation),electron-withdrawing substituents for lowering HOMO energy levels,and two-dimension(2D)-conjugated polymers with conjugated side-chains for broadening absorption and enhancing hole mobility.After the molecular structural optimization by side-chain engineering,the2D-conjugated polymers based on benzodithiophene units demonstrated the best photovoltaic performance,with powerconversion efficiency higher than 9%.展开更多
In this paper,the effects of change of degradable rate and relative molecular mass on the degradable behaviors of four lactide chain-extened polymers are contrasted with those of lactide polymers.The results indicated...In this paper,the effects of change of degradable rate and relative molecular mass on the degradable behaviors of four lactide chain-extened polymers are contrasted with those of lactide polymers.The results indicated that the four lactide chain-extened polymers could degrade in this experiment and their degradable rate were lower than that of P-LA.LA-SDI has the highest degradable rates among the four lactide chain-extened polymers,but there was no significant difference among aromatic and aliphatic lactide chain-extened polymers.The results showed that the degradable rates were dependent on experiment methods and condition and also indicated that the relative molecular mass became smaller and smaller with the progress of degradation time.展开更多
基金supported by the National Basic Research Program of China(2014CB643501)the National Natural Science Foundation of China(91433117,91333204 and 21374124)
文摘In recent years,conjugated polymers have attracted great attention in the application as photovoltaic donor materials in polymer solar cells(PSCs).Broad absorption,lower-energy bandgap,higher hole mobility,relatively lower HOMO energy levels,and higher solubility are important for the conjugated polymer donor materials to achieve high photovoltaic performance.Side-chain engineering plays a very important role in optimizing the physicochemical properties of the conjugated polymers.In this article,we review recent progress on the side-chain engineering of conjugated polymer donor materials,including the optimization of flexible side-chains for balancing solubility and intermolecular packing(aggregation),electron-withdrawing substituents for lowering HOMO energy levels,and two-dimension(2D)-conjugated polymers with conjugated side-chains for broadening absorption and enhancing hole mobility.After the molecular structural optimization by side-chain engineering,the2D-conjugated polymers based on benzodithiophene units demonstrated the best photovoltaic performance,with powerconversion efficiency higher than 9%.
文摘In this paper,the effects of change of degradable rate and relative molecular mass on the degradable behaviors of four lactide chain-extened polymers are contrasted with those of lactide polymers.The results indicated that the four lactide chain-extened polymers could degrade in this experiment and their degradable rate were lower than that of P-LA.LA-SDI has the highest degradable rates among the four lactide chain-extened polymers,but there was no significant difference among aromatic and aliphatic lactide chain-extened polymers.The results showed that the degradable rates were dependent on experiment methods and condition and also indicated that the relative molecular mass became smaller and smaller with the progress of degradation time.
