Luminescent properties of sol-gel prepared Y3Al5O12:Tb thin films

Abstract

A series of Tb-activated Y3Al5O12 films have been fabricated by spin coating on silicon substrate with sol-gel solutions. The formation of a single garnet phase is observed at 800 degrees C for 1 h in rapid thermal annealing furnace. The emission spectrum of the films induced by ultraviolet(UV) and electron excitations show the D-5 to F-6 transition and consisted of two groups, D-5(3) to F-6(before 485nm) and D-5(4) to 6F(after 485nm). The emission intensities of the films are dependent on the Tb concentrations.