[3] reported PCE of 6.5% using CH3NH3PbI3. At the
given TiO2 film thickness of about 3.6 mm, CH3MH3PbI3 perovskite
showed an absorption coefficient that was 10 times greater than that
of the conventional ruthenium-based molecular dye. Since organolead
halide perovskite is an ionic crystal, it easily dissolves in a polar
solvent