Electrical and Optical Properties of Transparent and Conductive Sb-Doped SnO_2 Films

Based on the measurement and analysis of carier concentration ne, mobility ue, electrical resistivity ρ, film thickness d, refractive index n, transmittance T(λ ) and reflectivity R(λ ) in ultraviolet-visible range, the eletrical and optical behaviours of Sb-doped SnO2 thin films derived by sol-gel processing were investigated. The experimental data show that the SnO2 thin films derived by the sol-gel processing have favourable electrical conductivity and transmittance in visible light range, in which n-type carrier concentration ne reachs to 1020cm-3, electrical resistivity ρ -10-2 Ω .cm, transmittance T -90%, as well as forbiden band gap Eg = 3.7 -3.8eV.