Flexible omnidirectional and polarisation-insensitive broadband plasmon-enhanced absorber

Weiling Dong, Tun Cao*, Kuan Liu, Robert E. Simpson

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

18 Citations (Scopus)

Abstract

We demonstrate a facile method to fabricate Ag-Sb2S3 nanoporous plasmonic absorbers on plastic, crystalline, and glassy substrates. Our lithography-free method exploits the immiscibility of Ag and Sb2S3 to control the surface morphology of the absorbing structure. We experimentally and theoretically show that the nanoporous structure exhibits a high absorption across the visible and near infrared spectrum, which is achieved by the coalescence of surface/bulk plasmons and the Sb2S3 semiconductor bandgap absorption. The absorptance is independent of polarisation over a broad range of incident angles. We found that the Ag-Sb2S3 nanoporous structure is an effective absorber on both flexible and non-flexible substrates, and the simple deposition of the Ag-Sb2S3 nanoporous structure facilitates fabrication over a 100 mm diameter wafer. Our work shows that plasmonic nanostructures can be fabricated at room temperature on an industrial scale using sputtering, which is already used to commercially produce photovoltaic cells. We foresee these inexpensive absorbers being applied to wearable light-harvesting systems, bio-sensing, and display technologies.

Original languageEnglish
Pages (from-to)272-279
Number of pages8
JournalNano Energy
Volume54
DOIs
Publication statusPublished - Dec 2018

Bibliographical note

Funding Information:
This work was supported by Singapore China Joint Research Program (JRP) with grant number 2015DFG12630 from the International Science & Technology Cooperation Program of China and grant number 1420200046 from the Singapore Science & Engineering Research Council (SERC). T.C. acknowledges support from Program for Liaoning Excellent Talents in University (Grant no. LJQ2015021 ). W.D. is grateful for her SUTD President's Graduate Fellowship.

Publisher Copyright:
© 2018 Elsevier Ltd

Keywords

  • Flexible
  • Metamaterials
  • Metasurface
  • Perfect absorber
  • Surface plasmon resonance

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • General Materials Science
  • Electrical and Electronic Engineering

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