Two kinds of sensitizers were designed by modifying the auxiliary acceptors for the potential use in dye-sensitized solar cells(DSSCs).For the porphyrins,two series of porphyrin sensitizers have been reengineered based on one of the best sensitizers YD2-o-C8 by introducing different heterocycles into acceptor part to form stronger acceptors[1](Fig.1).The computational results suggest that the stronger acceptor can result in a narrower energy gap,an obvious red-shift and stronger absorption in long-wavelength region compared with YD2-o-C8.