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Nickel Selenide Nanoparticles as a Cheap Alternative for Pt-Counter Electrode in Dye-Sensitized Solar Cells

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Colloidal nickel selenide nanocrystals (NCs) of two different compositions i.e., Ni3Se2 and Ni3Se4, where one is Ni-rich while another is Se-rich are synthesized using the hot injection method by merely changing the injection and growth temperature while keeping the rest of the reaction conditions like solvent, ligands, amount of precursors and reaction time identical. These nanocrystals exhibit electrocatalytic activity in the reduction of triiodide (I 3) to iodide (3I ), therefore employed as counter electrodes (CE) in dye-sensitized solar cells (DSCs). The DSC based on nickel selenides displays an efficiency of 6.4%, comparable to the Pt-based cells prepared by us.
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Keywords: Counter Electrode; Dye-Sensitized Solar Cell; Ni3Se2; Ni3Se4

Document Type: Research Article

Affiliations: Department of Chemistry, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India

Publication date: January 1, 2019

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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