Concentration effects on Pr3+ luminescence in LaAlO3 crystals

Concentration dependant emission spectra and fluorescence dynamic profiles have been investigated in PrxLa1−xAlO3 single crystals in order to better understand processes responsible for concentration quenching of the praseodymium 3P03P0 and 1D21D2 emissions. The cross-relaxation transfer rates were experimentally determined as a function of Pr3+ concentration. Decays were modeled and nearest-neighbor trapping rates were calculated.

Research highlights
► Emission spectra and fluorescence dynamic profiles of Pr3+ ion in LaAlO3 single crystal are strongly concentration dependent.
► The cross-relaxation rates for the 3P03P0 and 1D21D2 emissions were experimentally determined in a wide concentration range.
► Decays were modeled and nearest-neighbor trapping rates were calculated.