Photo- and cathodoluminescence of strontium titanate xerogel films doped with terbium ions

Abstract

Terbium-doped strontium titanate thin films are synthesized via the sol–gel method. The xerogel is deposited onto single-crystal silicon and porous anodic alumina substrates formed on single-crystal silicon. The structure and phase composition of the films are studied. The strontium titanate xerogel on single-crystal silicon exhibits a photoluminescence spectrum with a selective terbium emission band that is difficult to identify. The photoand cathodoluminescence spectra of the xerogel in porous matrices contain emission bands due to the electronic transitions of trivalent terbium.