Preparing Lead Sulfide Films with Nanostructures Using Chemical Bath (CBD) and Studying the Effect of the Concentration of the triethanolamine Complex on the Physical and Optical Properties

Abstract

In this research, lead sulfide films were prepared using a chemical bath method, where the concentration of the complexing agent (triethanolamine) was changed and the rest of the conditions were fixed, with the aim of studying the effect of the concentration of the complexing agent on the structural and optical properties of lead sulfide films, which have been used in many fields, especially in nanotechnology. The crystal structure of lead sulfide using X-ray diffraction technology (XRD), where the results showed that the structure of lead sulfide is cubic of the FCC type. The prepared films were characterized optically by studying the absorption spectra of each of them within the nm range (300-700). The results showed an increase in the films’ absorption of light with decreasing wavelength. There is also a change in the width of the forbidden field by changing the concentration of the complexing agent.

In this research, a sensor for gases (ammonia - methanol - ethanol) was prepared at a fixed concentration of the complexing agent 2M, and the sensitivity of this sensor to the three gases was studied, as well as the selectivity of the sensor to ammonia gas