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Efficiency Characteristics of Dye-Sensitized Solar Cells (DSSCs) by Incorporation of TiO 2 -Reduced Graphene Oxide Composite Electrodes

2013; Taylor & Francis; Volume: 579; Issue: 1 Linguagem: Inglês

10.1080/15421406.2013.802958

1563-5287

Hyunseok Ko, Hye-Jin Han, Gil Na, Ari Lee, Jae-Jung Yun, Eun-Mi Han,

Analytical Chemistry and Sensors

Abstract We successfully fabricated the TiO2-based photoelectrode doped with reduced graphene oxide (rGO) to improve the power conversion efficiency of dye-sensitized solar cells (DSSCs). The ratio of rGO was 0.3∼1.5 wt%. The DSSCs with the TiO2 photoanode incorporated 0.3 wt% rGO showed a maximum power conversion efficiency of 6.26% which is 44% higher than the pristine TiO2 photoelectrode. We concluded the introduction of rGO doped at 0.3 wt% ratio contributed to reducing the resistance of the surface and the interface of the photoelectrode from the observation of electrochemical impedance spectroscopy(EIS). Keywords: Dye-sensitized solar cellsgrapheneHNO3-treatmentphotoelectrode Acknowledgment This research was supported by Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education, Science and Technology (2011-0015137).