Abstract
Non-toxic, earth abundant absorber material CZTSSe thin film was successfully fabricated by spray pyrolysis, which is a low-cost, convenient and non-vacuum process. In this work, CZTSSe thin film is made from spray-deposited precursor stacks with subsequent sulfurization and selenization. The effect of the selenization time on the CZTSSe growth was investigated. X-ray diffraction, Raman spectrum and scanning electron microscope are used to characterize the precursors and CZTSSe thin films. The device is characterized by current-voltage measurements. By this process, the power conversion efficiency of the fabricated device reaches 3.1%.