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- Title
MoC/MnO composite materials as high efficient and stable counter electrode catalysts for dye-sensitized solar cells.
- Authors
Peng, Aidong; Gao, Yuan; Yang, Qun; Zuo, Xueqin; Tang, Huaibao; Li, Guang
- Abstract
MoC/MnO composite materials have been easily synthesized via a two-step hydrothermal and one-step carbonization method and used as counter electrode catalysts in DSSCs for the first time. The as-prepared samples were characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). And their electrocatalytic properties were also thoroughly studied by electrochemical impedance spectroscopy (EIS), Tafel polarization and so on. It is found that the electrocatalytic properties of the MoC/MnO CEs can be greatly enhanced. After optimizing the molar ratio of MoO3 precursor and KMnO4, the as-obtained MoC/MnO-0.25 CE has superior electrocatalytic ability, low charge transfer resistance and high incident photon-to-current conversion efficiency (IPCE). And the power conversion efficiency of the DSSC based on the MoC/MnO-0.25 CE is up to 8.00%, better than that of the DSSC used standard Pt CE (7.36%) in the same test environment, meanwhile the MoC/MnO-0.25 CE also has good electrochemical stability in the iodine-based electrolyte, which shows a promising candidate to replace Pt for DSSCs.
- Subjects
DYE-sensitized solar cells; COMPOSITE materials; X-ray photoelectron spectroscopy; HYDROTHERMAL carbonization; TRANSMISSION electron microscopy; ELECTRODES
- Publication
Journal of Materials Science: Materials in Electronics, 2020, Vol 31, Issue 3, p1976
- ISSN
0957-4522
- Publication type
Article
- DOI
10.1007/s10854-019-02717-8