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Broadband photoelectric hot carrier collection with wafer-scale metallic-semiconductor photonic crystals

  • Jeffrey B. Chou
  • , David P. Fenning
  • , Yu Wang
  • , Miguel Angel Mendez Polanco
  • , Jonathan Hwang
  • , Asmaa El-Faer
  • , Firas Sammoura
  • , Jaime Viegas
  • , Mahmoud Rasras
  • , Alexie M. Kolpak
  • , Yang Shao-Horn
  • , Sang Gook Kim

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

11 Scopus citations

Abstract

Photoelectric hot carrier generation in metal-semiconductor junctions can enable optical-to-electrical energy conversion at photon energies below the bandgap of the semiconductor. Here, we present the simulated and experimental results of our wafer-scale Au/TiO2 metallic-semiconductor photonic crystal (MSPhC). We demonstrate a broadband sub-bandgap photoresponse with a FWHM of 235 nm centered at 590 nm due to surface plasmon absorption, and we also show a photoresponse enhancement factor of 4.5 at 639 nm compared to a flat chip. Photoresponse is also shown to increase with decreasing metal thickness down to 13 nm. Applications of our results could lead to low-cost and robust photoelectrochemical and thermo-photovoltaic devices.

Original languageBritish English
Title of host publication2015 IEEE 42nd Photovoltaic Specialist Conference, PVSC 2015
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781479979448
DOIs
StatePublished - 14 Dec 2015
Event42nd IEEE Photovoltaic Specialist Conference, PVSC 2015 - New Orleans, United States
Duration: 14 Jun 201519 Jun 2015

Publication series

Name2015 IEEE 42nd Photovoltaic Specialist Conference, PVSC 2015

Conference

Conference42nd IEEE Photovoltaic Specialist Conference, PVSC 2015
Country/TerritoryUnited States
CityNew Orleans
Period14/06/1519/06/15

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

  1. SDG 7 - Affordable and Clean Energy
    SDG 7 Affordable and Clean Energy

Keywords

  • hot electrons
  • photonic crystal
  • photovoltaic cells
  • sub-bandgap absorption
  • surface plasmon

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