Re-dispersible Li+ and Eu3+ co-doped CdS nanoparticles: Luminescence studies

Pramana

Asar Ahmed⁴  S S Umare²  N S Gajbhiye⁴  Raghumani Singh Ninghoujam2¹  S J Sharma³  D K Panda⁴ 

[1] Chemistry Division, Bhabha Atomic Research Centre, Mumbai 400 085, India$$;Department of Chemistry, Visvesvaraya National Institute of Technology, Nagpur 440 011, India$$;Department of Electronics, S.K. Porwal College, Kamptee, Nagpur 441 002, India$$;Department of Chemistry, Indian Institute of Technology, Kanpur 208 016, India$$

关键词: Semiconductor;    luminescence;    lanthanide ions;    nanoparticles;    re-dispersible.;   

DOI  :  

学科分类：物理（综合）

来源: Indian Academy of Sciences

【 摘 要 】

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 ∼ 80 nm. The asymmetric ratio (𝐴21) 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 (𝐴21 = 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.

【 授权许可】

Unknown