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Title: Plasmonic black absorbers for enhanced photocurrent of visible-Light photocatalysis
Authors: Tan, FR 
Wang, N 
Lei, DY 
Yu, WX
Zhang, XM 
Issue Date: 18-Jan-2017
Source: Advanced optical materials, 18 Jan. 2017, v. 5, no. 2
Abstract: Plasmonic resonance of noble metal nanoparticles can drastically enhance the visible response of wide-bandgap photocatalysts such as TiO2, but the current technology has two fundamental problems: narrow absorption band and low absorption, which limit the energy efficiency of photocatalysis using sunlight. Here, an original plasmonic black absorber is reported, which sandwiches a 150 nm TiO2 layer between a layer of random Au nanoparticles and a rough Au surface (200 nm thick). The combined plasmonic effect of the Au nanoparticles and the Au rough surface enables a strong absorption (72%–91%) over 400–900 nm and a significantly (20-fold) enhanced photocurrent as compared to the bare TiO2 film. The strong absorption to visible and near infrared light, and the much enhanced photocurrent make the black absorber an ideal material for solar applications such as photocatalytic, photosynthetic, photovoltaic, and photothermal systems.
Publisher: Wiley-VCH
Journal: Advanced optical materials 
EISSN: 2195-1071
DOI: 10.1002/adom.201600399
Rights: © 2016 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
This is the peer reviewed version of the following article: Tan, F., Wang, N., Lei, D. Y., Yu, W., Zhang, X., Advanced Optical Materials 2017, 5, 1600399, which has been published in final form at This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions. This article may not be enhanced, enriched or otherwise transformed into a derivative work, without express permission from Wiley or by statutory rights under applicable legislation. Copyright notices must not be removed, obscured or modified. The article must be linked to Wiley’s version of record on Wiley Online Library and any embedding, framing or otherwise making available the article or pages thereof by third parties from platforms, services and websites other than Wiley Online Library must be prohibited.
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