Fabrication of and Photoluminescence in Sm²⁺-Doped Aluminosilicate Thin Films

Sm²⁺-doped 10Al₂O₃90SiO₂ thin films were prepared by coating on Al-deposited Si(100) wafers with a sol solution and heating in air, as well as in a H₂ atmosphere, The prepared thin films were examined with a scanning electron microscope for observing their morphologies, and the photoluminescence spectra of Sm ²⁺ ions were measured. The morphologies of the thin films were found to be highly dependent upon the samarium precursors and the emission peaks due to the ⁵D₀ → ⁷F₀ transitions of Sm²⁺ ions were highly dependent on the reduction processes of the Sm³⁺ ions and the samarium precursors.