Relation between conductance, photoluminescence bands and structure of ITO nanoparticles prepared by various chemical methods

摘要: To study the relation between conductance, photoluminescence bands and structure of indium tin oxide (ITO), nano- microparticles ITO were synthesised using various methods, including hydrothermal, oxalate precursor decomposition Pechini type sol–gel combustion methods. The resultant powders analysed by X-ray diffraction (XRD), resistance measurement, (PL) spectroscopy scanning electron microscopy techniques. crystallographic microstructural parameters samples refined from XRD patterns utilising Rietveld method. Two PL observed in 475 560 nm it was found that low-energy band intensity presents direct with conductivity while other one shows inverse relation. demonstrated highest intensity, hydrothermal sample has low conductivity. It suggested is characteristics excitons trapped oxygen vacancy high-energy attributed to defects centre. colour data resulted pattern refinement also validated. According results Popa's model, all show anisotropic micro-strain crystallite size. deduced textured 〈111〉 direction.