The photostability of dye-sensitized solid state photovoltaic cells: Factors determining the stability of the pigment in a nanoporous n-TiO2/cyanidin/p-CuI cell

The factors determining the stability of the pigment in a dye-sensitized solid state photovoltaic nanoporous n-TiO2/cyanidin/p-CuI cell was investigated by varying the gaseous environment around the cell and the sources of light used. It is found that photodegradation of the pigment cyanidin is almost completely suppressed provided oxygen, moisture and UV-light (lambda less than or equal to 348 nm) are excluded.