Nanocomposites of nickel oxide and zirconia for the preparation of photocathodes with improved performance in P-type dye-sensitized solar cells
In p-type dye sensitized solar cells (p-DSCs) with nickel oxide (NiO) based photocathodes one of the main causes of their relatively poor photoconversion performances is the fast recombination between the photoinjected holes in the valence band of the p-type semiconductor and the reduced form of the redox shuttle (typically I−). As a matter of fact, recombination phenomena at the NiO/electrolyte interface heavily limit both photovoltage and photocurrent.