期刊
ELECTROCHIMICA ACTA
卷 219, 期 -, 页码 38-48出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2016.09.150
关键词
titania-graphene nanocomposites; ex-situ and in-situ methods; dye-sensitized solar cells
资金
- Ministry of Science, Research and Technology of Iran
- Sharif University of Technology [G940309]
- Iran National Science Foundation (INSF)
In this work, a comparative study has been performed on two ex-situ and one in-situ doping of titania photoanodes with reduced graphene oxide. The presence of finely dispersed reduced graphene oxide facilitates electron transport and reduces electron-hole recombination resulting in a better performance of doped titania photoanodes. It was found that in-situ doping, i.e. introduction of graphene oxide in solution together with titania precursor was the most performant case of graphene doping. This result was obvious by studying dye-sensitized solar cells based on such doped photoanodes but was also and mainly analytically demonstrated by subjecting the obtained materials to characterization by several techniques, including thermal and N-2 adsorption-desorption analysis, SEM and TEM microscopy and XRD, XPS, Raman, UV-vis, Photoluminescence and Electrochemical Impedance Spectroscopy. (C) 2016 Elsevier Ltd. All rights reserved.
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