The ultrasonic transducer is considered the most important component of ultrasound medical instruments, and its key active layer generally fabricated by piezoelectric materials, such as BaTiO3, Pb (Zn, Ti)O3, PVDF, etc. As star material, perovskite photovoltaic materials (organic inorganic halide CH3NH3PbI3, CsPbI3, etc.) have great potential to be widely used in solar cells, LEDs, detectors, p...