Synthesis of Indium–Zinc Oxide Nanofibers and Investigation of Their Sensitivity to Ultraviolet Radiation

Abstract

Indium–zinc oxide (IZO) nanofibers are synthesized on Si–SiO₂ substrates. The size, morphology, crystal structure, and composition of nanofibers are investigated via scanning electron microscopy, atomic force microscopy, energy-dispersion analysis, and X-ray diffraction. The electric properties of nanofibers, as well as the sensitivity to ultraviolet (UV) radiation, are studied at various In and Zn concentrations. The highest sensitivity to UV radiation is shown to be at an indium content of about 50 at %. The increment of the photocurrent relative to the dark current is more than four orders of magnitude. The times of response and recovery are 6 and 50 s, respectively. The results reveal that IZO nanofibers may find application as UV sensors with improved characteristics.