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Abstract
A paper like self-sustained layer composed of graphene oxide (GO) and polyvinylpyrrlolidone (PVP) has been prepared by following the simple one pot chemical route. Further characterisation of the resulting layer pursued using various optical and analytical tools confirm the formation of GO-PVP composite. The appearance of C-N and C = O peaks in Fourier transform infra-red (FTIR) spectra, and increase in ID/IG ratio from 0.92 to 0.96 in Raman spectra, after PVP addition to the GO, indicate the attachment of PVP with GO and formation of GO-PVP composite. GO-PVP paper strip of size 1cm2 is silver pasted on ITO substrate and top aluminium (Al) contact is deposited using thermal deposition through shadow masking for fabrication of Al/GO-PVP/ITO device structure. The current-voltage characteristics shows decrease in electronic current through GO-PVP thin film compared to GO thin film and is attributed to the reduction in electrical conductance with inclusion of insulating polymer PVP.
Acknowledgements
The authors would like to thank the FIST grant of Department of Science and Technology, India, for providing funding for enhancing the instrumental facility at the Department of Physics and Astrophysics, University of Delhi. AKM would like to thank the University Grant Commission, India, and Research and Development Grant of the University of Delhi for providing financial support to pursue the research work.