metry data. The free energy change for charge separation (AGcs) was estimated to be exothermic with --0.51 eV, which favored the formation of charge-separation state. The PET from ZnPc to C60 in ZnPc-C60 made the dyad exhibit stronger reverse saturable absorption performance compared with C60 and the control sample in the Z-scan experiments, which indicated the synergistic effect of two active moieties in the dyad.
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