12 October 2017 Graphene-based copper oxide thin film nanostructures as high-efficiency photocathode for p-type dye-sensitized solar cells
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Abstract
Graphene-based p-type dye-sensitized solar cells (p-DSSCs) have been proposed and fabricated using copper oxide urchin-like nanostructures (COUN) as photocathode with an FeS 2 counter electrode (CE). COUN composed of Cu 2 O core sphere and CuO shell nanorods with overall diameters of 2 to 4    μ m were grown by a simple hydrothermal method with self-assemble nucleation. It was figured out that the formation of copper oxide core/shell structures could be adjusted by an ammonia additive leading to pH change of the precursor solution. In addition to a photocathode, we also demonstrated FeS 2 thin films as an efficient CE material alternative to the conventional Pt CEs in DSSCs. FeS 2 nanostructures, with diameters of 50 to 80 nm, were synthesized by a similar hydrothermal approach. FeS 2 nanostructures are demonstrated to be an outstanding CE material in p-DSSCs. We report graphene/COUN as photocathode and Pt / FeS 2 as CE in p-DSSCs, and results show that the synergetic combination of electrodes in each side (increased interconnectivity between COUN and graphene layer, high surface area, and high catalytic activity of FeS 2 ) increased the power conversion efficiency from 1.56% to 3.14%. The excellent performances of COUN and FeS 2 thin film in working and CEs, respectively, make them unique choices among the various photocathode and CE materials studied.
© 2017 Society of Photo-Optical Instrumentation Engineers (SPIE)
Bayrum Kilic, Bayrum Kilic, Sunay Turkdogan, Sunay Turkdogan, Aykut Astam, Aykut Astam, Sümeyra Seniha Baran, Sümeyra Seniha Baran, Mansur Asgin, Mansur Asgin, Hülya Cebeci, Hülya Cebeci, Deniz Urk, Deniz Urk, } "Graphene-based copper oxide thin film nanostructures as high-efficiency photocathode for p-type dye-sensitized solar cells," Journal of Photonics for Energy 7(4), 045502 (12 October 2017). https://doi.org/10.1117/1.JPE.7.045502 . Submission: Received: 7 June 2017; Accepted: 21 September 2017
Received: 7 June 2017; Accepted: 21 September 2017; Published: 12 October 2017
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