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Efficient green and red up-conversion emissions in Er/Yb co-doped TiO 2 nanopowders prepared by hydrothermal-assisted sol–gel process

Materials ScienceChemical EngineeringEngineeringNanoengineeringEnergy ConversionTitanium Dioxide MaterialsEnergy StoragePhoto-electrochemical CellChemistryHydrothermal-assisted Sol–gel ProcessEnergy MaterialRed Up-conversion EmissionsPowder SynthesisHydrothermal Processing