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Materials 2016, 9(2), 69; doi:10.3390/ma9020069

Controllable Electrochemical Synthesis of Reduced Graphene Oxide Thin-Film Constructed as Efficient Photoanode in Dye-Sensitized Solar Cells

Nanotechnology & Catalysis Research Centre (Nanocat), Institute of Postgraduate Studies (IPS), University of Malaya, 3rd Floor, Block A, 50603 Kuala Lumpur, Malaysia
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Author to whom correspondence should be addressed.
Academic Editor: Federico Bella
Received: 6 December 2015 / Revised: 21 December 2015 / Accepted: 15 January 2016 / Published: 25 January 2016
(This article belongs to the Special Issue Electrode Materials)
View Full-Text   |   Download PDF [5008 KB, uploaded 25 January 2016]   |  

Abstract

A controllable electrochemical synthesis to convert reduced graphene oxide (rGO) from graphite flakes was introduced and investigated in detail. Electrochemical reduction was used to prepare rGO because of its cost effectiveness, environmental friendliness, and ability to produce rGO thin films in industrial scale. This study aimed to determine the optimum applied potential for the electrochemical reduction. An applied voltage of 15 V successfully formed a uniformly coated rGO thin film, which significantly promoted effective electron transfer within dye-sensitized solar cells (DSSCs). Thus, DSSC performance improved. However, rGO thin films formed in voltages below or exceeding 15 V resulted in poor DSSC performance. This behavior was due to poor electron transfer within the rGO thin films caused by poor uniformity. These results revealed that DSSC constructed using 15 V rGO thin film exhibited high efficiency (η = 1.5211%) attributed to its higher surface uniformity than other samples. The addition of natural lemon juice (pH ~ 2.3) to the electrolyte accelerated the deposition and strengthened the adhesion of rGO thin film onto fluorine-doped tin oxide (FTO) glasses. View Full-Text
Keywords: reduced graphene oxide; electrochemical reduction; voltages; dye-sensitized solar cells (DSSCs); efficiency reduced graphene oxide; electrochemical reduction; voltages; dye-sensitized solar cells (DSSCs); efficiency
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Chong, S.W.; Lai, C.W.; Abd Hamid, S.B. Controllable Electrochemical Synthesis of Reduced Graphene Oxide Thin-Film Constructed as Efficient Photoanode in Dye-Sensitized Solar Cells. Materials 2016, 9, 69.

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