Photoconductive characteristic in individual tungsten oxide nanowire

In this paper, we show the photoconductivity from the device composed by a single tungsten oxide nanowire (WO_3-x NW) and the silver paint. At the photoconductivity testing system , the photoconductivity and the Raman spectra of the sample could be obtained in-situ. The experiments revealed strong out-put photopower and optoelectrics responsivity from the device consisting of individual tungsten oxide nanowire. One of the most intriguing aspects of these experiments was the dependence of the photoconductivity on the illumination position in the sample. Further, the mechanism of the photocurrent generation could be concluded as the oxygen defect at the surface of WO_3-x NW and the Schottky barrier at the WO_3-x NW and silver paint contacts. All these effects could be of practical use in the design and fabrication of photodetectors based on single tungsten oxide nanowire.