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 SnO
2
nanopowders. The undoped and doped samples (K,Dy: SnO
2
) and (K,Sm: SnO
2
) 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 SnO
2
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 SnO
2
(K
⁺
, Dy
³⁺
) than SnO
2
(K
⁺
, Sm
³⁺
) in the energy range of (400-4000) cm
^-1
.