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Morphology and stoichiometry control of hierarchical CuInSe₂/SnO₂ nanostructures by directed electrochemical assembly for solar energy harvesting

Lookup NU author(s): Dr Stevin PramanaORCiD

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Abstract

CuInSe 2/SnO 2 core-shell and hierarchical branched nanostructures were produced by directed electrochemical assembly. By changing the spatial electric field along the deposition region, we can control the morphology and stoichiometry of deposited product from In-poor-CuInSe 2 nanoparticles to near stoichiometry CuInSe 2 branched nanowires. A combination of FESEM, TEM, XRD and Raman spectroscopy investigations reveals that both morphology and chemical compositions of CuInSe 2 strongly depend on the spatial electric field distribution on the SnO 2/Si substrate. We observed that higher reducing potential can assist the formation of CuInSe 2 with uniform coverage at the cathode side, but only In-poor-CuInSe 2 nanoparticles are formed on the anode side. Optical and photo-electrochemical examination confirmed the potential application of these core-shell nanostructures for solar energy harvesting. © 2011 Elsevier B.V.

Publication metadata

Author(s): Sun J, Sun C, Batabyal SK, Tran PD, Pramana SS, Wong LH, Mhaisalkar SG

Publication type: Article

Publication status: Published

Journal: Electrochemistry Communications

Year: 2012

Volume: 15

Issue: 1

Pages: 18-21

Print publication date: 01/02/2012

Online publication date: 26/11/2011

ISSN (print): 1388-2481

ISSN (electronic): 1873-1902

Publisher: Elsevier

URL: https://doi.org/10.1016/j.elecom.2011.11.015

DOI: 10.1016/j.elecom.2011.11.015

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