Abstract

Nano-scale powders of YAG(Y 3Al 5O 12):Ce 3+ were obtained by the polyacrylamide gel method. Furthermore, the crystal structures and spectra of these powders were studied. Compared with micro-scale powders obtained from co-precipitation process, nano-scale powders show decrease of lattice parameter. At the same time, the phenomena in the emission spectrum and excitation spectrum of nano-scale YAG:Ce 3+ were found. The blue-shift peaks in both of the emission spectrum and the excitation spectrum are due to the transition between 5d– 4f energy levels. It show that the structural characteristics of nanoscale YAG:Ce 3+ influence the wavelength of spectra.

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