Charge transfer mechanisms in multistructured photoelectrodes for perovskite solar cells

Here we introduce the research studies of perovskite solar cells with multistructured photoelectrodes based on very wide bandgap nanocrystalline materials. A series of solar cells with the device architecture FTO/c-TiO2/ZrO2(HfO2)/CH3NH3PbI3/Spiro-MeO-TAD/Au was fabricated and characterized. The results obtained demonstrate a successful possibility of PV application of the nanostructured oxide materials with bandgap values exceeding 5 eV. We propose a mechanism, which describes charge carrier transport at the interface of perovskite/multistructured photoelectrode.