Study and elaboration of Fe doped SnO 2 thin films for the capture of Li ions

Abstract

In this study , tin oxide (SnO 2 ) films were deposi ted on 480°C heated glass by spray pyrolysis with moving nozzle SPMN )). Tin chloride (SnCl 2 , 2H 2 O) was used as precursor solution, iron chloride (FeCl 3 ) and lithium chloride (LiCl 2 ) were used as doping sources. Effect of high/low Fe and Li doping concentration on structural, morphological, optical, and electrical properties of SnO 2 thin films. The t ransmittance of all Fe doped SnO 2 thin films was more than 78% in the visible region. The o ptical gap was found to be in 3.64 3.58 eV. The ex istence of functional groups and the chemical bonding is confirmed by Fourier transform infrared spectroscopy (FTIR) spectra. X ray diffraction study showed that elaborated thin films have a polycrystalline structure with tetragonal crystal. The preferenti al orientation shift from 211 ) toward 110 ) plane for 1, 2 and 4 wt.% Fe/Sn only, whereas crystalline size was ranged in 57 36 nm. An increase in electrical resistivity increases from 1.2×10 4 to 3.4×10 3 Ω cm. The Hall effect measurements have shown n type for non doped SnO 2 thereafter the type conductivity changes to p type for more than 2wt.% Fe doped SnO 2 thin films.