@Article{CL.2023.2011.821,
AUTHOR = {L. R. Singh, R. K. L. Singh, M. A. Hussain},
TITLE = {Optical and photoconductivity properties of Mn doped nanocrystalline PbS thin films deposited by chemical bath deposition method},
JOURNAL = {Chalcogenide Letters},
VOLUME = {20},
YEAR = {2023},
NUMBER = {11},
PAGES = {821--828},
URL = {http://www.techscience.com/CL/v20n11/65105},
ISSN = {1584-8663},
ABSTRACT = {Mn doped nanocrystalline PbS thin films were deposited onto glass substrates by chemical 
bath deposition (CBD) method. All the deposited thin films were found to be crystalline 
having cubic phase structure. The optical properties of the Mn doped nanocrystalline PbS 
thin films have been studied. They have high absorbance in the UV-visible region. The linear 
nature of (αhν)<sup>2</sup>
 vs (hν) plots of PbS thin films confirmed that the transition is direct and the 
optical band gap energy of PbS films is found to increase from 1.90 eV to 2.28 eV with 
decreasing crystallite size from 21 nm to 11 nm and the optical band gap values are higher 
than the bulk value (0.40 eV). The optical band gap of Mn doped PbS films are found to 
increase with increase in dopant concentrations. The Photoconductive rise time and decay 
time determined from the prepared films are found to decrease with increase in doping 
concentrations. },
DOI = {10.15251/CL.2023.2011.821}
}