Spectroscopy and excited states dynamics of Tb3+-doped KLa(MoO4)2 crystals

Abstract The luminescence properties of Tb 3+ doped into KLa(MoO 4 ) 2 crystals are presented. The intensity dependence of the emission features from 5 D 3 and 5 D 4 levels was investigated in the temperature range 10–600 K. The decay profiles of 5 D 3 emission have been analyzed using Inokuti–Hirayama model for an energy transfer process in the absence of migration. Phonon-assisted ( 5 D 3 , 7 F 0 ) → ( 5 D 4 , 7 F 6 ) cross relaxation is evidenced even for a low doping rate indicating non uniform distribution of the Tb 3+ ions inside the host.