Laser Induced Plasma of PbS Thin Films: Effects of Laser Power on Morphology, Structure, and Optical Properties

The structural and optical characteristics of lead sulfide (PbS) nanoparticles from PbS films are investigated in this study. Laser induced plasma of thin samples on glass substrates is performed using an Nd:Yak laser with a wavelength of 1064 nm and a range of laser intensities (160, 200, 260, 300) mJ. The effect of increasing the laser intensity on the structural characteristics of the material is investigated using atomic force microscopy (AFM), X‐ray diffraction (XRD), and scanning electron microscopy (SEM). The XRD data indicate that the membrane produced is polycrystalline in nature, with the (111) and (200) planes being the main phases. Additionally, the (AFM) measurements revealed that the smallest particle size is produced with the lowest laser deposition energy (160 mJ). The results indicated that it is possible to fabricate thin films with medium grain sizes. The impact of altering the laser intensity on the optical characteristics is investigated, and it is discovered that they have direct acceptable transitions in the range (1.65–1.95) electron volts.