What difference between DSSCs and Organic Photovoltaics (OPVs)?

A classic OPV consists of two key components, electron donor and electron acceptor. The charge separation in a OPV is occurred in the donor and acceptor interface. In a DSSC, the charge separation is occurred in photosensitizer and semiconductor. There are several main differences between OPVs and DSSCs:

In DSSCs, inorganic semiconductors, such as TiO2 and ZnO, used as electron collectors. However, in OPVs, organic semiconductors, such fullerene derivatives, used as electron acceptor.

In OPVs, the electron donor is mixed with acceptor in order to increase the interfacial area. However, in DSSCs, nanoporous semiconductor is used to load more photosensitizer.

DSSCs has a process called “sensitization”, which is not required in a OPV. Upon development of these two photovoltaic techniques, hybrid solar cell based on DSSCs and OPVs has been also emerged. For example, TiO2 and ZnO, also have been used in OPVs as electron buffer layer in order to increase the electron collection efficiency.

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