Investigation of The Structural Properties of SnO2 Co-doped by (K, Dy) and (K, Sm) Synthesized by The Co-precipitation Method for Photon Conversion

We report in this work the effect of Dysporsium and Samarium doping and activated by Potassium as charge compensator on the structural properties of SnO2 nanopowders. The undoped and doped samples (K,Dy: SnO2) and (K,Sm: SnO2) at 3% K and various concentration of Dy and Sm (1%, 3 % and 5 %) ) were synthesized via a coprecipitation method.The prepared samples have been characterized by X-ray diffraction and infrared spectroscopy. The peak at 26.59° observed in XRD confirm the formation of a SnO2 phase in a rutile tetragonal structure with orientation preferences for (110). Rietveld refinement analysis revealed the contraction of lattice parameters due to doping / co-doping, with a particle size range of 12-39 nm determined using Debye Scherrer's formula. Also, the FTIR spectra confirmed the presence of Sn-O and Sn–O–Sn bonds in all the synthesized samples and the transmittance is greater in the SnO2(K⁺, Dy³⁺) than SnO2(K⁺, Sm³⁺) in the energy range of (400-4000) cm^-1.