Spectroscopic analysis of rare earth ions doped nanomaterial

Rare Earth ions doped nanomaterial were prepared by chemical precipitation method and characterized by XRD, SEM, TEM and EDAX. Their absorption and fluorescence spectra have been recorded in UV-Visible and NIR region. The XRD study revealed the spherical wurtzite structure without second phase. The TEM images confirmed the spherical morphology of the nanomaterial with size in the quantum dots range. From absorption spectra various parameters i.e. Slater – Condon (F_k ), Racah (E^k ), Lande¢( z_4f ) and Judd-Ofelt parameters have been computed for each nanomaterial specimen by using partial regression method taking into consideration all the absorption peaks observed. The spontaneous emission provability, Fluorescence branching ratio, Radiative lifetime and stimulated emission cross section have also been computed with help of fluorescence spectra.

Keywords: CdS nanomaterial, XRD, TEM, Absorption and Fluorescence Spectra