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Journal of Materials Science

, Volume 52, Issue 23, pp 13541–13551 | Cite as

Synthesis of highly active cobalt molybdenum sulfide nanosheets by a one-step hydrothermal method for use in dye-sensitized solar cells

  • Lijun Su
  • Yaoming XiaoEmail author
  • Gaoyi HanEmail author
Electronic materials

Abstract

Cobalt molybdenum sulfide (Co(1 − x)MoxS2, x = 2/3, 1/2, 1/3) nanocomposites with hierarchical nanosheet structure are prepared on the flexible titanium foils by a facile hydrothermal method and used as the counter electrode (CE) materials for the dye-sensitized solar cells (DSSCs). It is interesting that the first produced MoS2 nanosheets play an important role as the template for the continuously growing of the Co(1 − x)Mo x S2 nanosheets. Otherwise, it will grow up into octahedral CoS2 in the synthesis system without the Mo source. The Co(1 − x)Mo x S2 CE demonstrates higher catalytic activity for the reduction of triiodide to iodide than that of the MoS2, and CoS2 CEs due to the Co(1 − x)Mo x S2 CE with thinner hierarchical nanosheets offers more catalytic active sites and exhibits additional synergistic effect of the combination of Mo and Co. The DSSC with Co1/2Mo1/2S2 CE achieves a photovoltaic conversion efficiency of 9.16%, which is higher than that of the MoS2 (8.27%) and CoS2 (7.18%) CEs and even higher than that of the platinum CE (8.49%) under full sunlight illumination (100 mW cm−2, AM1.5 G).

Notes

Acknowledgements

The authors appreciate funding from National Natural Science Foundation of China (61504076, 21574076, and U1510121) and National Natural Science Foundation of Shanxi Province (2015021129 and 2014011016-1). And we are also very grateful for the test platform provided by Shanxi University of Scientific Instrument Center.

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interest.

Supplementary material

10853_2017_1457_MOESM1_ESM.doc (26.3 mb)
Supplementary material 1 (DOC 26935 kb)

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Copyright information

© Springer Science+Business Media, LLC 2017

Authors and Affiliations

  1. 1.Key Laboratory of Chemical Biology and Molecular Engineering of Education Ministry, Key Laboratory of Materials for Energy Conversion and Storage of Shanxi Province, Innovation Center of Chemistry and Molecular Science, Institute of Molecular ScienceShanxi UniversityTaiyuanPeople’s Republic of China
  2. 2.Fujian Key Laboratory of Functional MaterialsHuaqiao UniversityXiamenPeople’s Republic of China

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