Fabrication of semi-transparent perovskite films with centimeter-scale superior uniformity by the hybrid deposition method

We report the development of instrumentation and methodology for fabricating large area semi-transparent organo-lead-halide perovskite films. In our method, the growth of perovskite films relies on the control of CH3NH3I flow and vapor pressure inside a vacuum chamber. Solar cell devices based on the prepared semi-transparent perovskite films as thin as similar to 135 nm achieved an efficiency of 9.9% and a high open circuit voltage of 1.09 V.