Anonsensitization
type perovskite solar cell was proposed by Snaith et al.
[5] in which the mixed halide perovskite CH3NH3PbI3xClx-coated
Al2O3 film demonstrated PCE of 10.9%. Rapid progress was made
over the year, and PCEs exceeding 15% were achieved using organolead
halide perovskite [6,7].