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, Sunay Turkdogan, Aykut Astam, Sümeyra Seniha Baran, Mansur Asgin, Hülya Cebeci, 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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