resulting in two separate light-harvesting
units, which might enhance the absorption intensity due to
the absorption overlap of both the same donors and p-spacers. (ii)
Indole and phenoxazine donors were introduced into the DepeA
branches as the electron donor units. As a consequent, the photovoltaic
performance of the cells based on these dyes would be
influenced by the structure of the linkages, such as different length
of flexible alkyl chains and the rigid alkyl chain. Moreover, the
HOMO and LUMO energy levels of the dyes would be tuned by the
different donors, as a result, the conversion efficiencies of the DSSCs
would be affected due to the changed absorption range and intensity
of the dyes.