Comparative study of Photoluminescence Properties of Various Lead Sulfide Morphologies
Photoluminescence analysis is a useful method to study the optical properties of semiconductor nanostructures. Distinct processes take place to result in the light emission from the nanostructure. Various deposition methods and morphologies changed the emission band in semiconductor nanostructures. Three different morphology of Lead Sulfide structures such as nonospheres, star-shaped and dendrite nanostructures have been analyzed and the Photoluminescence results were compared. In three cases, band emissions are in visible region and it was observed that the incidence of quantum limits in resulting of increasing surface to volume ratio is impressive to optical properties.
 M. B. O. Lopez, J. J. V. Jauregui, R. R. Bon, E. Prokhrov, J. G. Hernandez, “Impedance spectroscopy studies on chemically deposited CdS and PbS polycrystalline films, ” Journal of Physics and Chemistry of Solids, vol. 63, pp. 665-668, 2002.
 S. Kumar, T.P. Sharma, M. Zulfequar, M. Husainb, “Characterization of vacuum evaporated PbS thin films", Physica B, vol. 325, pp. 8-16 2003.
 C. Liu, J. Heo, X. Zhang, J. L. Adam, "Photoluminescence of PbS quantum dots embedded in glasses, ” Journal of Non-Crystalline Solids, vol. 354, pp. 618-623, 2008.
 A. C. Wu, J. B. Shi, C. J. Chen, Y. C. Chen, P. F. Wu, J. Y. Lin, “Correlation between structural and optical properties of 30 nm and 60 nm lead sulfide nanowires, ” Materials Letters, vol. 61, pp. 4659-4661, 2007.
 Y.Y. Feng, J. Zhang, P. Zhou, G.F. Lu, J.C. Bao, W. Wang, Z. Xu, “A facile method to prepare PbS nanorods, ” Materials Research Bulletin, vol. 39, pp. 1999-2005, 2004.
 R. S. Kane, R. E. Cohen, R. Silbey, “Theoretical Study of the Electronic Structure of PbS Nanoclusters, ” J. Phys. Chem, vol. 100, pp. 7928-7932, 1996.
 M. Mozafari, F. Moztarzadeh, D. Vashaee, L. Tayebi, “Effects of heat treatment on physical, microstructural and optical characteristics of PbS luminescent nanocrystals, ” Physica E, vol. 44, pp. 1429-1435, 2012.
 R. Yousefi, B. Kamaluddin, M. Ghoranneviss, F. Hajakbari, “Auger and photoluminescence analysis of ZnO nanowires grown on AlN thin film, ” Applied Surface Science, vol. 255, pp. 6985-6988, 2009.
 M. Yousefi, F. Gholamian, D. Ghanbari, M. S. Niasari, “Polymeric nanocomposite materials Preparation and characterization of star-shaped PbS nanocrystals and their influence on the thermal stability of acrylonitrile-butadiene-styrene (ABS) copolymer, ” Polyhedron, vol. 30, pp. 1055-1060, 2011.
 S. Xiong, B. Xi, D. Xu, C. Wang, X. Feng, H. Zhou, Y. Qian, “L-Cysteine-Assisted Tunable Synthesis of PbS of Various Morphologies, ” J. Phys. Chem. C, vol. 111, pp. 16761-16767, 2007.