Characteristics of Electron Transport Study of Composited Graphene-Zinc Oxide Thin Film Photoanode for Dye-Sensitized Solar Cells
| Autor: | Muhamad Kamil Yaakob, N.A.S. Affendi, A.M.M. Ali, Muhd Zu Azhan Yahya, A. Lepit, Mohamad Fariz Mohamad Taib, Oskar Hasdinor Hassan, Noor Syafiqah Samsi |
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| Rok vydání: | 2020 |
| Předmět: |
Materials science
Graphene chemistry.chemical_element 02 engineering and technology Zinc 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics Zinc oxide thin films 01 natural sciences Electron transport chain Atomic and Molecular Physics and Optics 0104 chemical sciences law.invention Dye-sensitized solar cell chemistry Chemical engineering law General Materials Science 0210 nano-technology |
| Zdroj: | Solid State Phenomena. 307:185-191 |
| ISSN: | 1662-9779 |
| DOI: | 10.4028/www.scientific.net/ssp.307.185 |
| Popis: | Graphene-Zinc Oxide (Gr-ZnO) nanocomposites films were successfully synthesized via facile electrodeposition method in an aqueous solution under Gr concentration conditions. Gr, as a highly conductive carbon, acts as an anchor for ZnO nanosheets and plays a substantial role in controlling the degree of dispersion of ZnO nanosheets onto indium-doped tin oxide (ITO) substrate to form Gr-ZnO nanocomposite. Atomic force microscopy (AFM) and field-emission scanning electron microscopy (FESEM) analysis of Gr-ZnO nanocomposite samples confirmed that the presence of ZnO nanosheets with a high degree of dispersity and crystallinity which is well linked to the thin layer of Gr nanoparticle on ITO substrate. The surface roughness of the films found increased to ~270 nm on Gr-ZnO as compared to Gr ~44 nm and ZnO ~3 nm. Further, the x-ray diffraction spectroscopy (XRD) analysis showed the result is in good agreement with Raman spectroscopy study. The cyclic voltammetry (CV) of Gr-ZnO nanocomposite revealed that the effect of electron-hole recombination process was increased and the presence of Gr in ZnO photoanode provides the fastest redox reaction and hence offers the fastest electron transfer in photoanode. |
| Databáze: | OpenAIRE |
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