4.7 Article

Fabrication of highly dispersed ultrafine Co9S8 nanoparticles on carbon nanofibers as low-cost counter electrode for dye-sensitized solar cells

Journal

JOURNAL OF COLLOID AND INTERFACE SCIENCE
Volume 522, Issue -, Pages 95-103

Publisher

ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2018.03.042

Keywords

Dye-sensitized solar cells; Counter electrode; Electrospinning; Co9S8 nanoparticles; Carbon nanofibers

Funding

  1. National Natural Science Foundation of China [21474043, 51773075, 51473065]

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Platinum is the most commonly used dye-sensitized solar cell (DSSC) counter electrode (CE) due to its superior electrocatalytic activity and high transparency. However, the scarcity and high-cost of Pt restrict its practical application for the large-scale production of DSSCs. Herein, a facile approach for fabricating highly dispersed Co9S8 nanoparticles with small diameters in the range of 5-10 nm on the surface of carbon nanofibers (CNFs) via an electrospinning followed by calcination and hydrothermal reaction was developed. The composite material could be used as an efficient and low-cost Pt-free CE for DSSCs. The DSSC assembled with the prepared Co9S8/CNFs composite as a CE exhibited excellent electrocatalytic activity and a power conversion efficiency (PCE) of 8.37%, which is comparable to that of the DSSC with conventional thermally deposited Pt as the CE (8.50%). Therefore, the Co9S8/CNFs composite can be used as an efficient and low-cost promising alternative CE in DSSCs. (C) 2018 Elsevier Inc. All rights reserved.

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