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The absorption and emission spectra as well as decay time profile of Dy3+ ions in LaAlO3 nanocrystals were analyzed.The crystal structure of LaAlO3 was confirmed from XRD measurement.The emission peaks from blue to red came from main emitting level of dyspro-sium 4F9/2 to the ground and other excited levels of Dy3+ ions.Cross relaxation process led to non-radiative quenching of luminescence,so that the lifetime of the 4F9/2 energy level ions decreased with increasing amount of doped Dy3+ ions.The cross relaxation transfer rates were ex-perimentally determined as a function of Dy3+ concentration.
The absorption and emission spectra as well as the decay time profile of Dy3 + ions in LaAlO3 nanocrystals were analyzed. The crystal structure of LaAlO3 was confirmed from the XRD measurement. The emission peaks from blue to red came from the main emitting level of dyspro-sium 4F9 / 2 to the ground and other excited levels of Dy3 + ions. Cross relaxation process led to non-radiative quenching of luminescence, so that the lifetime of the 4F9 / 2 energy level ions decreased with increasing amount of doped Dy3 + ions. The cross relaxation transfer rates were ex-perimentally determined as a function of Dy3 + concentration.