Large-scale fabrication of Pr³⁺ doped or undoped nanosized ATiO₃ (A = Ca, Sr, Ba) with different shapes via a facile solvothermal technique

CaTiO₃ nanoflowers, SrTiO₃ nanocubes, and BaTiO ₃ nanospheres have been prepared by an environmentally friendly solvothermal technique and structurally characterized by X-ray diffraction and field emission scanning electron microscopy. Red fluorescence originating from intra 4f ¹D₂-³H₄ transition of Pr³⁺ is observed by doping Pr³⁺ ions in CaTiO₃ nanoflowers. The energy transfer and red emission processes of Pr³⁺ in CaTiO₃:Pr³⁺ nanoflowers are discussed.