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Reasonable construction of Fe3O4/Ni@N-RGO nanoflowers as highly efficient counter electrodes for dye-sensitized solar cells

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Abstract

The rational design of high-performance yet low-cost counter electrodes (CEs) with exceptional catalytic activity for the I/I3 redox couple and excellent corrosion resistance is of great importance for dye-sensitized solar cells (DSSCs). Metal nickel-based CEs have super electrical conductivity for the oxidation of I, but they lack the ability to restore I3, leading to relatively poor photoelectric conversion efficiency (PCE). Herein, we propose the design and development of a novel nanostructured CE material composed of hierarchical porous Fe3O4 nanoflowers decorated with Ni nanoparticles and wrapped by N-doped reduced graphene oxide nanosheets (Fe3O4/Ni@N-RGO). The as-prepared multi-component electrode material was applied as a CE for DSSCs, attaining high efficiency and excellent stability. The PCE of Fe3O4/Ni@N-RGO based DSSCs reaches 8.96%, which is superior to those based on Fe3O4 (7.92%) or Pt (7.87%). Moreover, the Fe3O4/Ni@N-RGO electrode also displays ultrahigh corrosion resistance under complicated working conditions. The advantages of the Fe3O4/Ni@N-RGO electrode material indicate its good potential for application in DSSCs as a high-performance and inexpensive CE material.

Graphical abstract: Reasonable construction of Fe3O4/Ni@N-RGO nanoflowers as highly efficient counter electrodes for dye-sensitized solar cells

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Article information


Submitted
26 Mar 2020
Accepted
22 Apr 2020
First published
14 May 2020

Sustainable Energy Fuels, 2020, Advance Article
Article type
Paper

Reasonable construction of Fe3O4/Ni@N-RGO nanoflowers as highly efficient counter electrodes for dye-sensitized solar cells

H. Xu and Z. Jin, Sustainable Energy Fuels, 2020, Advance Article , DOI: 10.1039/D0SE00494D

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