Photoluminescence in epitaxially grown BaTiO3: Eu3+ films on SrTiO3 (100) substrates by a solution based-route

摘要

Epitaxially-grown europium-doped BaTiO3 thin films have been prepared on single crystal SrTiO3 (100) substrates by a wet solution process using metal carboxylate complexes. Thin films were fabricated by spin coating and the precursor films were pre-fired in argon at 500 degrees C for 10 min to decompose the organics. After multiple coating and pre-firing, the resultant films were annealed at 850 degrees C for 30 min in argon, followed by cooling to room temperature. The BaTiO3 : Eu3+ films after annealing were preferentially oriented with {100}- and/or {001} axis perpendicular to the substrate surface. Epitaxial growth to the substrate surface was confirmed by pole-figure analysis. The photoluminescence spectrum of epitaxial films under UV excitation showed clear red emission at 615 nm.