Structural and optical properties of undoped and Mn-doped SnO2 nanoparticles by hydrothermal method Online publication date: Fri, 19-Sep-2014
by J. Gajendiran; V. Rajendran
International Journal of Nanoparticles (IJNP), Vol. 7, No. 2, 2014
Abstract: Undoped and Mn-doped tin oxide (SnO2) nanoparticles were synthesised using precursors such as tin salt and alkali hydroxide as a mineraliser via a simple hydrothermal method. X-ray powder diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), high-resolution TEM (HR-TEM), energy dispersive X-ray spectra (EDX), UV-vis absorption spectra and photoluminescence (PL) spectra were used to characterise the undoped and Mn-doped SnO2 samples. The confirmation of the nanoparticles size and the nanocrystalline nature of SnO2 samples were carried out using TEM and selected area electron diffraction (SAED) respectively. The EDX analysis proved the presence of Mn ions into the SnO2 sample. The band gap energy of the undoped (3.90eV) and Mn-doped SnO2 (3.95eV) samples is estimated from the UV-visible absorption spectra and may be used in optoelectronic devices. The mechanism for the hydrothermal synthesis of the SnO2 nanoparticles is also discussed.
Online publication date: Fri, 19-Sep-2014
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