Structural, optical and electrical behavior of zinc oxide/MWCNT composite thin films Articles uri icon

publication date

  • June 2019

start page

  • 1

end page

  • 19


  • 51(220)

International Standard Serial Number (ISSN)

  • 0306-8919

Electronic International Standard Serial Number (EISSN)

  • 1572-817X


  • ZnO/MWCNT composite thin films were prepared on glass substrates by spray pyrolysis, and their structural and optical behavior were investigated. X-ray diffraction analysis revealed the films hexagonal wurtzite phase with a preferred (002) growth orientation. Photoluminescence spectra of the ZnO film showed two main bands, a UV emission band at 377 nm (3.28 eV) and a broad blue-yellow band at 439&-546 nm with a band at 503 nm. Optical transmittance of 80&-85% in the visible range was observed in all the films. In the I&-V curves, conductivity was improved when incorporating the MWCNT into the zinc oxide. ZnO/MWCNT, at a value of 2 V and irradiated with visible light presented an increased current from 0.6 to 3.2 nA, and a similar pattern was observed when impinging UV light. Film thickness was measured by profilometry, obtaining thicknesses in the range from 143 to 257 nm.


  • composite; electrical properties; semiconductor; thin films; zinc oxide