非富勒烯型聚合物太阳电池取得超过11%的光伏效率

Fullerene-free Polymer Solar Cells with over 11% Efficiency

非富勒烯型聚合物太阳电池,由于其非富勒烯类受体材料可易于通过分子设计获得与聚合物给体材料互补的光吸收、匹配的电子能级从而有可能获得更高的效率,而受到了越来越多的关注.最近的研究发现,采用非富勒烯型受体材料与一种新型中等带隙聚合物给体材料可实现创纪录的11.2%的能量转换效率.这一成果预示非富勒烯受体将成为聚合物太阳电池研究下一波的新热点,并有可能成为这一类太阳电池新的突破口.

Fullerene-free polymer solar cells have received increasing attention, because the non-fullerene acceptors offer a great chance to achieve complementary absorption and appropriate molecular orbitals to the polymer donor materials,which may result in much improved performance of the resulting devices. Recently, a new record of power conversion efficiency of 11.2% has been set based on a non-fullerene electron-accepting material and a medium-bandgap conjugated polymer. This result indicates that the development of new non- fullerene electron-accepting materials and their applications in polymer solar cells would be a next hot spot of the research field, which may be the breakthrough point of this technology.