Synthesis of Sn1-xMnxO2Nanoparticles and study of the structural and optical properties

Tin dioxide is a semiconductor with n-type as a crystal structure of rutile. There are few studies on the influence of Mn3+ ions on structural and optical properties. The current paper shows the influence of manganese doping on the structural and optical properties of Sn1-xMnxO2 nanoparticles at (0, 5, 10, 15, 20, 25) % molar doping ratios prepared by the sol-gel method. At 200°C, the dried powders were performed from XRD data of all samples. The shift of the peaks in the XRD patterns towards the higher angles indicates that the manganese ions have been excellentlydoped into the crystal lattice of SnO2 with sequentialincreases in dopant levels. The crystallite size was determined based on the equation of Scherer as well as by FE-SEM it was confirmed that the Tin dioxide nanoparticles are within the nanoscale. As for the effect of doping on the the energy gap, the increase in doping rates led to a clear decrease in the optical energy gap. The reason for this decrease is due to the fact that doping with mangan ese led to an increase in the density of local levels caused by atoms of the doping material within the energy gap.