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Issue 11, 2012
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Enhancement of low energy sunlight harvesting in dye-sensitized solar cells using plasmonic gold nanorods

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Abstract

This communication describes the use of Ag2S-encapsulated Au nanorods (AuNR@Ag2S) to enhance longer wavelength sunlight utility in dye-sensitized solar cells (DSSCs). We observed that the longitudinal plasmon resonance of AuNRs induces a remarkable increase of 37.6% in photocurrent generation at 600–720 nm. Optical characterizations indicate that the increased optical density and decreased light transmission as a result of AuNRs incorporation engender the striking improvement. With AuNR@Ag2S, the final power conversion efficiency (PCE) of the DSSC with a thin anode (6 μm) increases from 4.3% to 5.6%, which is comparable to that of a pure TiO2 anode based DSSC (5.8%) with a film thickness of 11 μm. Further, incorporation of AuNR@Ag2S into the thick anode leads to the PCE increasing to 7.1%.

Graphical abstract: Enhancement of low energy sunlight harvesting in dye-sensitized solar cells using plasmonic gold nanorods

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Supplementary files

Article information


Submitted
26 Jun 2012
Accepted
29 Aug 2012
First published
29 Aug 2012

Energy Environ. Sci., 2012,5, 9444-9448
Article type
Communication

Enhancement of low energy sunlight harvesting in dye-sensitized solar cells using plasmonic gold nanorods

S. Chang, Q. Li, X. Xiao, K. Y. Wong and T. Chen, Energy Environ. Sci., 2012, 5, 9444
DOI: 10.1039/C2EE22657J

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