Method for preparing perovskite film and solar cell thereof

摘要

A method for preparing a perovskite film includes the steps of applying a first solution on a substrate to form a film by spin coating and applying a second solution on the film made from the first solution by spin coating to form the perovskite film. The perovskite film is expressed by a general formula of ABX 3 . The solute of the first solution at least contains one of AX and BX 2 . The solute of the second solution at least contains one of AX and BX 2 . A method for preparing the solar cell using the perovskite film as the active layer (absorber) is also disclosed.