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Issue 20, 2018, Issue in Progress
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Ternary composites of Ni–polyaniline–graphene as counter electrodes for dye-sensitized solar cells

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Abstract

Dye-sensitized solar cells (DSSCs), different in principle from the conventional solar cells based on p–n junctions, are competitively cost-effective. For development of this kind of emerging solar cell, it is very significant to reduce their cost and improve their energy conversion efficiency to the maximum extent. In this article, ternary composites (Ni–PANI–G composites) consisting of nickel nanoparticles, polyaniline (PANI), and graphene (G) were prepared for the first time and used as counter electrodes to replace the noble metal Pt in DSSCs. In the case of PANI, the introduction of Ni nanoparticles can improve the electrocatalytic ability for the reduction of triiodide ions in the counter electrode, while in the meantime, the addition of graphene in the Ni–PANI–G composites can increase the electrical conductivity of the counter electrode. The optimized DSSCs fabricated by using the Ni–PANI–G composites as the counter electrode exhibit an overall power conversion efficiency of 5.80% compared to 5.30% for reference platinum (Pt) counter-electrodes. Electrochemical impedance spectra (EIS) show that the charge-transfer resistance at the interface between electrolyte and counter-electrode in the case of the ternary composite is obviously decreased. These results are significant to develop low-cost counter electrode materials for DSSCs.

Graphical abstract: Ternary composites of Ni–polyaniline–graphene as counter electrodes for dye-sensitized solar cells

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Article information


Submitted
31 Jan 2018
Accepted
09 Mar 2018
First published
19 Mar 2018

This article is Open Access

RSC Adv., 2018,8, 10948-10953
Article type
Paper

Ternary composites of Ni–polyaniline–graphene as counter electrodes for dye-sensitized solar cells

X. Chen, J. Liu, K. Qian and J. Wang, RSC Adv., 2018, 8, 10948
DOI: 10.1039/C8RA00934A

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    [Original citation] - Published by The Royal Society of Chemistry.

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