Effects of substrate temperature on structural and optoelectronic properties of SnSe thin films by nebulized spray deposition for solar cell applications

SnSe thin films were prepared by nebulized spray deposition method at different substrate temperature of 250-325 degrees C. The effects of deposition temperature on the structural, morphological, electrical and optical properties of the films were evaluated using XRD, SEM, Hall Effect, UV and PL. The X-ray diffraction study reveals that the all films present an orthorhombic structure of preferred orientation along the (111) direction. From the recorded optical data indicates the existence of direct allowed band gap in the range of 1.14-1.24 eV was obtained. The electrical resistivity shows that the prepared films are semiconducting nature and resistivity is found to be low at the temperature of 300 degrees C. (C) 2020 Elsevier Ltd. All rights reserved.