Electrical and Photoluminescence Properties of Mo-doped ZnO Films Deposited by Spray Pyrolysis

Abstract

Spray deposited Mo-doped zinc oxide (MZO) films were grown on glass substrates at different substrate temperatures (Ts)that varied in the range of 300°C-450 °C at aconstant Mo-doping concentration of 2 at. %.XRD spectra revealed better crystallinity of films prepared atTs400 °C. FTIR spectra showed the vibrational modes related toZn–O bonding.Photoluminescence spectra of MZO films showed a peakrelated toviolet emissionsbetween 400 nm and 420 nm. Electrical analysis showed n type semiconducting nature of the films and the films grown at Ts= 400 °C hadlow resistivity and high mobility.Adetailed analysis on theeffect of substrate temperatureon photoluminescence and electrical propertiesof MZO films wasdiscussed and reported.