Plasmonic Black Absorbers for Enhanced Photocurrent of Visible-Light Photocatalysis

Furui Tan, Ning Wang, Dangyuan Lei, Weixing Yu, Xuming Zhang

Research output: Journal article publicationJournal articleAcademic researchpeer-review

17 Citations (Scopus)

Abstract

KGaA, Weinheim 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 TiO2layer 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 TiO2film. 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.
Original languageEnglish
Article number1600399
JournalAdvanced Optical Materials
Volume5
Issue number2
DOIs
Publication statusPublished - 18 Jan 2017

Keywords

  • black absorbers
  • perfect absorbers
  • photocatalysis
  • plasmonics
  • solar energy

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics

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