Time-resolved luminescence spectra of Eu~(3+) doped YVO_4, Sr_2CeO_4 and Gd_2Zr_2O_7 nanopowders

摘要

Europium is a phosphor suitable as red-emitting material that can be pumped with near-UV light emitting diodes. In this study we investigate the time-resolved luminescence spectra of of europium doped YVO_4, Sr_2CeO_4 and Gd_2Zr_2O_7 nanopowder samples. All nanopowder samples were prepared using combustion synthesis. The luminescence spectra of the samples were obtained in a continuous series of measurements under the same experimental conditions. The comparison of spectra reveals the effects of host matrices on optical excitation and emission of europium. We also compare the emission spectra of nanopowders by using the CIE chromaticity diagram. The basic setup of our time-resolved laser induced fluorescence experiment consists of Nd-YAG Vibrant Optical Parametric Oscillator laser system and Hamamatsu streak camera.