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Efficient ZnO Nanowire Solid-State Dye-Sensitized Solar Cells Using Organic Dyes and Core-shell Nanostructures

Authors
Journal
The Journal of Physical Chemistry C
1932-7447
Publisher
American Chemical Society
Publication Date
Volume
113
Issue
43
Identifiers
DOI: 10.1021/jp904919r

Abstract

We have applied a MgO and a ZrO shell deposition method to control the interface between two indolenebased organic dyes in solid-state dye-sensitized solar cells. The shell deposition was carried out at less than 100 °C, and shell thickness was shown to be 2 nm for the ZrO and 6-10 nm for the MgO by transmission electron microscopy. X-ray photoelectron spectroscopy has shown the initial ZnO NWs and core-shell structures have little surface water contamination. The use of suitable dyes, D102 and D149, has led to power conversion efficiency for ZnO NW based hybrid solar cells of 0.71%. Transient absorption measurements indicate that enhancements in photoinduced charge generation with core-shell formation are the main factor leading to the improved device efficiency. © 2009 American Chemical Society.

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