Optical properties of sonochemically synthesized dysprosium doped CdO nanoparticles

Abstract

Chemistry Division, Materials Science Division, Bhabha Atomic Research Centre, Mumbai-400 085, India E-mail: [email protected], [email protected] Fax : 91-22-25590457 Manuscript received 15 July 2009, accepted 20 July 2009 The undoped and dysprosium-doped CdO nanoparticles were prepared by sonochemical method in aqueous media and characterized with X-ray diffraction (XRD), transmission electron microscopy (TEM), UV-Vis diffuse reflectance spectrum, and photoluminescence spectra. The results of XRD Indicated that the obtained CdO : Dy³⁺ nanoparticles were well crystallized with a cubic phase. The TEM image illustrated that the CdO : Dy³⁺ nanoparticles were spherical with an average size around 40 nm. Under Irradiation of UV light, the emission spectrum of CdO : Dy³⁺ nanoparticles exhibited alongwith the host emission, the characteristic line emissions arising from the ⁴F_9/2→ ⁶H₃ (J = 13/2, 15/2) transitions of the Dy³⁺ Ions, with the dominating emission centered at ~ 580 nm. The optimum doping concentration for CdO : Dy³⁺ nanoparticles was determined to be 3 mol%.