Hydrothermal Synthesis of Cu2ZnSnS4 Nanostructure and Their Application as H2S Gas Sensor

Abstract

In this study, Cu2ZnSnS4 (CZTS) nanostructure are successfully synthesized by using hydrothermal method. Structural, morphology, optical properties have been studied for thin films (CZTS) deposited via spin-coating method. X-ray diffraction show that the films have pure tetragonal-kesterite structure preferred orientation along (112). The FE-SEM shows that (CZTS) have a nano-sphere like structure, consist with diameters less than 35 nm. UV-Vis spectroscopy measurement showed that absorption coefficient (α <104 cm-1) and the band gap energy is equal to 1.42 eV. The Sensitivity properties of (CZTS) samples for H2S gas was tested at various operating temperature and found that the highest sensitivity is (83.63 %) at T=150 °C.