EFFECT OF SURFACTANTS ON THE SIZE, COLOR, PHOTOLUMINESCENCE AND RESISTIVITY OF INDIUM TIN OXIDE NANOPARTICLES PREPARED BY CO-PRECIPITATION METHOD

Ayyoob Jafari (), Yadolah Ganjkhanlou (), Mahmood Kazemzad () and Hamzeh Ghorbani ()
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Ayyoob Jafari: Biomedical Engineering Department, Islamic Azad University, Qazvin Branch, Qazvin, Iran
Yadolah Ganjkhanlou: Materials and Energy Research Center, P. O. Box 14155-4777, Tehran, Iran
Mahmood Kazemzad: Materials and Energy Research Center, P. O. Box 14155-4777, Tehran, Iran
Hamzeh Ghorbani: School of Metallurgy and Materials Engineering, Iran University of Science and Technology, Tehran, Iran

Surface Review and Letters (SRL), 2012, vol. 19, issue 05, 1-6

Abstract: Indium tin oxide (ITO) nanoparticles were synthesized by co-precipitation method using ammonia as a precipitator in absence/presence of various surfactants (LABS and Triton X-100). The synthesized nanoparticles were investigated by scanning electron microscopy, resistance measurement, photoluminescence (PL) spectroscopy and X-ray diffractometry (XRD) techniques. The XRD patterns of nanoparticles were also studied by Rietveld refinement method for calculation of crystallite size, micro-strain and lattice parameter. The results indicate that by application of LABS and Triton X-100 as surfactant the particle size was increased. Two luminescence bands were observed in PL spectra of ITO nanoparticles with the excitation energy lower than their band gaps. It was found that the ratios of luminescence bands have relation with resistances and colors of ITO nanoparticles. In addition, the band structure of ITO nanoparticles was described considering the obtained results.

Keywords: Co-precipitation; indium tin oxide; band structure; resistivity; luminescence (search for similar items in EconPapers)
Date: 2012
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DOI: 10.1142/S0218625X12500540

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