Issue 34, 2015

A triple-layered, hierarchical 1D core–shell nanostructure with a plasmonic Ag octahedral core for use in solid-state dye-sensitized solar cells

Abstract

A triple-layered, core–shell nanostructure is prepared with Ag octahedra, a SnO2 nanotube (SNT), and a TiO2 nanosheet (TNS) via a combined process of electrospinning and solvothermal reaction. In particular, a facile one-step synthesis process for Ag octahedral nanocrystals is suggested. The Ag@SNT@TNS hetero-nanostructure is uniformly distributed in an organized TiO2 film derived with the poly(vinyl chloride)-graft-poly(oxyethylene methacrylate) (PVC-g-POEM) graft copolymer and hydrophilically pretreated TiO2 nanocrystals. The efficiency of solid-state dye-sensitized solar cells (ssDSSCs) fabricated with this hetero-nanostructure reaches 7.8% at 100 mW cm−2, which is much greater than that of cells without a hetero-nanostructure (5.2%) or that prepared with commercially available Dyesol paste (4.4%). This higher efficiency is attributed to the one-dimensional (1D) tubular structure, the improved surface area, and the plasmonic effect of Ag octahedral nanocrystals, resulting in enhanced short-circuit current density (Jsc), as confirmed by the incident photon-to-current efficiency (IPCE), electrochemical impedance spectroscopy (EIS), and intensity modulated photocurrent/voltage spectroscopy (IMPS/IMVS).

Graphical abstract: A triple-layered, hierarchical 1D core–shell nanostructure with a plasmonic Ag octahedral core for use in solid-state dye-sensitized solar cells

Supplementary files

Article information

Article type
Paper
Submitted
22 Jun 2015
Accepted
22 Jul 2015
First published
22 Jul 2015

J. Mater. Chem. A, 2015,3, 17644-17651

Author version available

A triple-layered, hierarchical 1D core–shell nanostructure with a plasmonic Ag octahedral core for use in solid-state dye-sensitized solar cells

D. J. Kim, S. H. Ahn, C. S. Lee and J. H. Kim, J. Mater. Chem. A, 2015, 3, 17644 DOI: 10.1039/C5TA04566E

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