摘要
Erbium-doped barium titanate(BaTiO_(3):Er)xerogel film with a thickness of about 500 nm was formed on the porous strontium titanate(SrTiO_(3))xerogel film on Si substrate after annealing at 800°C or 900°C.The elaborated structures show room tempera-ture upconversion luminescence under 980 nm excitation with the photoluminescence(PL)bands at 523,546,658,800 and 830 nm corresponding to^(2)H1_(1/2)→^(4)I_(15/2),^(4)S_(3/2)→^(4)I_(15/2),^(4)F_(9/2)→^(4)I_(15/2)and^(4)I_(9/2)→^(4)I_(15/2)transitions of trivalent erbium.Raman and X-ray diffraction(XRD)analysis of BaTiO_(3):Er\porous SrTiO_(3)\Si structure showed the presence of perovskite phases.Its excellent up-conversion optical performance will greatly broaden its applications in perovskite solar cells and high-end anti-counterfeiting technologies.
基金
This research was funded by the grant T19-MLDG of State Committee on Science and Technology of the Republic of Belarus and grant 19.80013.50.07.03A/BL of the Republic of Moldova,grant X20P-388 of the Belarusian Republic Foundation for Fundamental Research and grant 20-52-00039 of the Russian Foundation for Basic Research.
