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    • Keywords


      Semiconductor; luminescence; lanthanide ions; nanoparticles; re-dispersible.

    • Abstract


      Re-dispersible CdS, 5 at.% Eu3+-doped CdS, 2 at.% Li+ and 5 at.% Eu3+ co-doped CdS nanoparticles in organic solvent are prepared by urea hydrolysis in ethylene glycol medium at a low temperature of 170°C. CdS nanoparticles have spherical shape with a diameter of $\sim 80$ nm. The asymmetric ratio ($A_{21}$) of the integrated intensities of the electrical dipole transition to the magnetic dipole transition for 5 at.% Eu3+-doped CdS is found to be 3.8 and this ratio is significantly decreased for 2 at.% Li+ and 5 at.% Eu3+ co-doped CdS ($A_{21} = 2.6$). It establishes that the symmetry environment of Eu3+ ion is more favored by Li-doping. Extra peak at 550 nm (green emission) could be seen for 2 and 5 at.% Eu3+ co-doped CdS. Also, the significant energy transfer from host CdS to Eu3+ is found for 5 at.% Eu3+-doped CdS compared to that for 2 at.% Li+ and 5 at.% Eu3+ co-doped CdS.

    • Author Affiliations


      N S Gajbhiye1 Raghumani Singh Ninghoujam2 Asar Ahmed1 D K Panda1 S S Umare3 S J Sharma4

      1. Department of Chemistry, Indian Institute of Technology, Kanpur 208 016, India
      2. Chemistry Division, Bhabha Atomic Research Centre, Mumbai 400 085, India
      3. Department of Chemistry, Visvesvaraya National Institute of Technology, Nagpur 440 011, India
      4. Department of Electronics, S.K. Porwal College, Kamptee, Nagpur 441 002, India
    • Dates

  • Pramana – Journal of Physics | News

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