Abstract
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.
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Acknowledgements
The authors of this paper wish to thank Advanced Nanostructured Materials and Applications Network for its support via Secretaría de Educación Pública (SEP) (2015-2016 Red Temática). Author M. J. Robles-Águila wishes to thank the Powder Technology at Universidad Carlos III (UC3M) for its support and assistance in carrying out the experimental section to obtain the multiwall carbon nanotubes. The kind assistance of Abel Garzón Román is highly appreciated for the synthesis of multiwall carbon nanotubes. We are also grateful to Dr. A. Méndez-Blas for his professional assistance (Laboratory Electrochemical Process) and for his support in carrying out Photoluminescence Spectroscopy measurements at the Central Laboratory IFUAP. NDC is grateful for the Grant (604224) awarded by CONACyT. We also want to thank C. Ramírez-Portillo and N’machi Anumba for the linguistic comments throughout the manuscript, and as well as Dr. E. González-Vergara and M. Y. Rosas-Bravo for their support.
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The authors of this paper wish to thank Advanced Nanostructured Materials and Applications Network for its support via Secretaría de Educación Pública (SEP) and project VIEP 1000524279-VIEP2018.
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Díaz-Corona, N., Martínez-Juárez, J., Pérez-Luna, J.G. et al. Structural, optical and electrical behavior of zinc oxide/MWCNT composite thin films. Opt Quant Electron 51, 220 (2019). https://doi.org/10.1007/s11082-019-1935-4
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DOI: https://doi.org/10.1007/s11082-019-1935-4