Applied Magnetic Resonance

, Volume 50, Issue 6, pp 785–795 | Cite as

Spectroscopic Study of Mn2+ Doped PbS Nanocrystals

  • Ram KripalEmail author
  • C. Rudowicz
  • Upendra Mani Tripathi
Original Paper


Mn2+ doped PbS (PbS:Mn2+) semiconductor nanocrystals have been synthesized by standard chemical method and characterized using various techniques for possible applications in quantum dots. This work describes new physical properties of these nanocrystals that have emerged from our investigations. The PbS:Mn2+ nanocrystals have cubic structure (space Group Fm3m) and the average crystallite size lies between 5 and 10 nm as characterized by X-ray diffraction (XRD) and Transmission Electron Microscopy (TEM) analysis. The structural properties of PbS:Mn2+ nanoparticles are also studied by UV/Vis absorption spectrum and High-Resolution Transmission Electron Microscopy (HRTEM). The quantitative chemical analysis of pure and Mn2+ doped PbS nanocrystals has been done by Energy Dispersive Spectroscopy (EDS) spectra. The energy band gaps have been determined by UV/Vis absorption study using Tauc Plot as (in eV):1.79, 1.90, 2.23, and 2.39 for Mn2+ concentration equal to 0, 0.05, 0.26, and 0.52%, respectively. The luminescence behavior of the nanocrystals has been studied by photoluminescence (PL) spectra. The magnetic and electronic properties of PbS:Mn2+ nanocrystals were studied using Electron Paramagnetic Resonance (EPR) spectroscopy. Analysis of EPR spectra enabled determination of the electronic g-factor, the second-rank axial zero-field splitting parameter D and the hyperfine parameter A.



The authors are grateful to the Head, Department of Physics for providing departmental facilities. The authors are also grateful to SAIF IIT Bombay for providing EPR and TEM facilities, Dr. Suneet Dwivedi for providing XRD facility of Nano Phosphor Application Centre of the University of Allahabad and Dr. S. N. Pandey for providing PL facility of the MNNIT, Allahabad. One of the authors, Upendra Mani Tripathi, is thankful to the University Grants Commission for granting Junior Research Fellowship.


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Copyright information

© Springer-Verlag GmbH Austria, part of Springer Nature 2018

Authors and Affiliations

  • Ram Kripal
    • 1
    Email author
  • C. Rudowicz
    • 2
  • Upendra Mani Tripathi
    • 1
  1. 1.EPR Lab, Department of PhysicsUniversity of AllahabadAllahabadIndia
  2. 2.Faculty of ChemistryA. Mickiewicz UniversityPoznanPoland

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