Reactively sputtered nickel nitride as electrocatalytic counter electrode for dye- and quantum dot-sensitized solar cells

Title
Reactively sputtered nickel nitride as electrocatalytic counter electrode for dye- and quantum dot-sensitized solar cells
Author(s)
안광순강진수[강진수]박민아[박민아]김재엽[김재엽]박선하[박선하]정동영[정동영]유승호[유승호]김진[김진]박종우[박종우]최정우[최정우]이경재[이경재]정주원[정주원]고민재[고민재]성영은[성영은]
Keywords
REDOX ELECTROLYTE; TIO2 FILMS; LOW-COST; EFFICIENCY; OXIDE; SPECTROSCOPY; GRAPHENE; PBS
Issue Date
201505
Publisher
NATURE PUBLISHING GROUP
Citation
SCIENTIFIC REPORTS, v.5
Abstract
Nickel nitride electrodes were prepared by reactive sputtering of nickel under a N-2 atmosphere at room temperature for application in mesoscopic dye- or quantum dot-sensitized solar cells. This facile and reliable method led to the formation of a Ni2N film with a cauliflower-like nanostructure and tetrahedral crystal lattice. The prepared nickel nitride electrodes exhibited an excellent chemical stability toward both iodide and polysulfide redox electrolytes. Compared to conventional Pt electrodes, the nickel nitride electrodes showed an inferior electrocatalytic activity for the iodide redox electrolyte; however, it displayed a considerably superior electrocatalytic activity for the polysulfide redox electrolyte. As a result, compared to dye- sensitized solar cells (DSCs), with a conversion efficiency (eta) = 7.62%, and CdSe-based quantum dot-sensitized solar cells (QDSCs, eta = 2.01%) employing Pt counter electrodes (CEs), the nickel nitride CEs exhibited a lower conversion efficiency (eta = 3.75%) when applied to DSCs, but an enhanced conversion efficiency (eta=2.80%) when applied to CdSe-based QDSCs.
URI
http://hdl.handle.net/YU.REPOSITORY/32240http://dx.doi.org/10.1038/srep10450
ISSN
2045-2322
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공과대학 > 화학공학부 > Articles
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