TITLE:
Nanocrystalline CuO Thin Films for H2S Monitoring: Microstructural and Optoelectronic Characterization
AUTHORS:
Vikas Patil, Datta Jundale, Shailesh Pawar, Manik Chougule, Prsad Godse, Sanjay Patil, Bharat Raut, Shashwati Sen
KEYWORDS:
CuO Thin Films, Structural Properties, Optoelectronic Properties, H2S Sensor
JOURNAL NAME:
Journal of Sensor Technology,
Vol.1 No.2,
June
29,
2011
ABSTRACT: Nanocrystalline copper oxide (CuO) thin films were deposited onto glass substrates by a spin coating technique using an aqueous solution of copper acetate. These films were characterized for their structural, mor-phological, optoelectronic properties by means of X-ray diffraction (XRD) scanning electron microscopy (SEM), UVspectroscopy and four probe method. The CuO films are oriented along (1 1 1) plane with the monoclinic crystal structure. These films were utilized in H2S sensors. The dependence of the H2S response on the operating temperature, H2S concentration of CuO film (annealed at 700。C) was investigated. The CuO film showed selectivity for H2S. The maximum H2S response of 25.2 % for the CuO film at gas concentra-tion of 100 ppm at operating temperature 200oC was achieved.