期刊
APPLIED SURFACE SCIENCE
卷 422, 期 -, 页码 1015-1021出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apsusc.2017.06.126
关键词
Dye-sensitized solar cell; Graphitic carbon nitride; Reduced graphene oxide; Charge recombination
类别
资金
- Natural Science Foundation of Zhejiang Province [LY17F040005]
- 521 Talents Project of Zhejiang Sci-Tech University
- Xinmiao Undergraduate Student Talents Program of Zhejiang Province [2016R406001, 2016R406024]
- Young Researchers Foundation of Zhejiang Provincial Key Laboratory of Fiber Materials and Manufacturing Technology at Zhejiang Sci-Tech University [2015QN01]
TiO2/reduced graphene oxide (TiO2/rGO) composite has been widely exploited as the photoanode material for high efficient dye-sensitized solar cells (DSSCs). However, the power conversion efficiency (PCE) is limited due to the charge recombination between the rGO and electrolyte. In this paper, we incorporate 5.5 wt% layered structure graphitic carbon nitride (g-C3N4) and 0.25 wt% rGO into TiO2 nanoparticle (NP) film to form a triple-component TiO2/rGO/g-C3N4 (TGC) photoanode for DSSCs. The TGC photoanode significantly increased the dye absorption and thus to improve the light harvesting efficiency. Furthermore, the electrochemical impedance spectroscopy (EIS) analysis of the DSSCs based on TGC photoanode demonstrates that the incorporation of the rGO and g-C3N4 into TiO2 effectively accelerates the electron transfer and reduces the charge recombination. As a result, the DSSCs based on TGC film show PCE of 5.83%, enhanced by 50.1% compared with that of pure TiO2 photoanodes. This result strongly suggests a facile strategy to improve the photovoltaic performance of DSSCs. (C) 2017 Elsevier B.V. All rights reserved.
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