Structural, Optical and Electrical Properties of Ce Doped SnO2 Nanoparticles Prepared by Surfactant Assisted Gel Combustion Method

Authors M. Veerabhadrayya1, R. Ananda Kumari2, G. Nagaraju3, Udayabhanu3, Y.T. Ravikiran4, B. Chethan5

1University College of Science, Tumkur University, 572103 Tumakuru, India

2Shri Siddaganga College of Arts, Science and Commerce, 572102 Tumakuru, India

3Energy Materials Research Laboratory, Department of Chemistry, Siddaganga Institute of Technology, 572103 Tumakuru, India

4Department of PG Studies in Physics, Government Science College, 577501 Chitradurga, India

5Visvesvaraya Technological University, 590018 Belagavi, India

Issue Volume 12, Year 2020, Number 4
Dates Received 01 April 2020; revised manuscript received 15 August 2020; published online 25 August 2020
Citation M. Veerabhadrayya, R. Ananda Kumari, G. Nagaraju, et al., J. Nano- Electron. Phys. 12 No 4, 04017 (2020)
PACS Number(s) 61.46.Df, 73.63.Bd, 77.22.Gm, 78.67.Bf,
Keywords Tin oxide (8) , Gel combustion method, Rietveld refinement, Ac conductivity (3) .

Nanocrystalline pure and Ce doped tin oxide (SnO2) powders were synthesized through surfactant (CTAB and PEG) assisted gel combustion method using urea as a fuel. Prepared samples were characterized by PXRD, FESEM, UV-Vis, FTIR and Impedance analyzer. The PXRD analysis revealed the tetragonal rutile SnO2 phase. The grain size was estimated using the Debye-Scherrer equation and Williamson-Hall method. The cell parameters were found using Rietveld refinement and Nelson-Rieley plot method. The FESEM pictures showed the formation of nanoparticles of almost spherical shape. FTIR spectrum revealed the bands due to the fundamental overtones and combination of Sn-O and Sn-O-Sn entities. The UV-Vis spectra showed the decrease in band gap with Ce content due to an increase in defects. The effect of Ce doping on the electrical properties was studied at room temperature. The dielectric parameters, ε' and tanδ were maximum for pure SnO2 sample. The variation of dielectric properties and ac conductivity with frequency is due to the Maxwell-Wagner type of interfacial polarization.

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