Optical properties of thin films CZTSe produced by RF magnetron sputtering and thermal evaporation

Optical properties of thin CZTSe films produced by RF magnetron sputtering and thermal evaporation of preliminarily synthesized material are studied. Transmission and reflection coefficients are studied. The optical band-gap width depending on substrate temperature is estimated; in optimal modes, it is 1.1-1.3 eV. The study of electrical properties shows that CZTSe possesses low charge-carrier mobility at room temperature and very high concentration p-type. Electron microscopy shows that the film possesses a polycrystalline structure.