Solvothermal Synthesis and Gas Sensing Properties of Nanostructured La6Sb8S21 Composite Thin Films for Enhanced NO2 Detection
Abstract
In this work, Composite La6Sb8S21 thin films were prepared and their structural, optical, and gas-sensing properties were studied. The nanostructured morphology and crystalline structure of the these films were revealed. As well, their optical characteristics such as absorption coefficients and energy band gaps have been determined. Electrical properties have been studied using I-V characteristic curves. Hall effect measurements were studied to determine the conductivity, resistivity, and charge carrier mobility. The gas-sensing performance of the prepared thin films was conducted at different operating temperatures in terms of sensitivity, response time, and recovery time. The results reveal that the composite La6Sb8S21 thin films are ideal for gas sensing applications, particularly to NO2 gas. Investigation has been extended to correlate the nanostructure, electronic properties and gas sensitivity, thus providing the broad outlook upon the new composite system.
