Modified Triphenylamine-Dicyanovinyl-Based Donor-Acceptor Dyes with Enhanced Power Conversion Efficiency of p-Type Dye-Sensitized Solar Cells

摘要

Since the 1990s, great efforts have been devoted to dye-sensitized solar cells (DSCs) for harvesting electricity from solar energy. At present, most of the studies focus on n-type DSCs by using sensitized n-type semiconductors such as TiO_2 as a photoelectrode. As their inverse model, p-type DSCs that inject holes into the valence band of a p-type semiconductor such as NiO from the excited state of a sensitizer have rarely been studied, and their overall efficiencies (0.41 % at most) are much lower than those of their n-type counterparts. p-DSCs have great potential to be used in inexpensive tandem devices for high photoconversion efficiencies. Thus, there is a great need to investigate and develop more efficient p-DSCs to match the performance of n-DSCs for advanced p tandem devices.