writer：Ligui Li*, Wenhan Niu, Xiaoli Zhao, Xiaoniu Yang*, Shaowei Chen*
keywords：morphology control, organic solar cells, photoactive layer
source：期刊
specific source：Sci. Adv. Mater., 2015, DOI:10.1166/sam.2015.2258
Issue time：2015年
The nanoscale morphology of the electronic donor and acceptor materials in photoactive layers significantly
influences both the exciton split and charge carrier delocalization and extraction processes in prevalent bulkheterojunction
(BHJ) based polymer solar cells (PSCs). An optimized morphology, including interpenetrating
networks of donor and acceptor materials, nanoscale phase separation, and a vertical percolation path with a
high concentration of electron donors at the anode and acceptors at the cathode, is a prerequisite for achieving
highly efficient PSCs. Moreover, the stability of the material morphology is also gaining increasing attention
because it is an important factor that can also affect the durability of the photovoltaic devices. This review
summarizes the recent progress in nanoscale morphology control of BHJ PSCs towards further enhancement
in device performance and life time.