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Plasmons Enhancing Sub-Bandgap Photoconductivity in TiO2 Nanoparticles Film.
Ibrahem, Mohammed A; Verrelli, Emanuele; Adawi, Ali M; Bouillard, Jean-Sebastien G; O'Neill, Mary.
Afiliación
  • Ibrahem MA; Laser Sciences and Technology Branch, Applied Sciences Department, University of Technology, Al-Sinaa Street, Baghdad 10066, Iraq.
  • Verrelli E; UNAM-Institute of Materials Science and Nanotechnology and National Nanotechnology Research Center, Bilkent University, Ankara 06800, Turkey.
  • Adawi AM; Department of Physics and Mathematics, University of Hull, Cottingham Road, Kingston upon Hull HU6 7RX, United Kingdom.
  • Bouillard JG; Department of Physics and Mathematics, University of Hull, Cottingham Road, Kingston upon Hull HU6 7RX, United Kingdom.
  • O'Neill M; Department of Physics and Mathematics, University of Hull, Cottingham Road, Kingston upon Hull HU6 7RX, United Kingdom.
ACS Omega ; 9(9): 10169-10176, 2024 Mar 05.
Article en En | MEDLINE | ID: mdl-38463264
ABSTRACT
The coupling between sub-bandgap defect states and surface plasmon resonances in Au nanoparticles and its effects on the photoconductivity performance of TiO2 are investigated in both the ultraviolet (UV) and visible spectrum. Incorporating a 2 nm gold nanoparticle layer in the photodetector device architecture creates additional trapping pathways, resulting in a faster current decay under UV illumination and a significant enhancement in the visible photocurrent of TiO2, with an 8-fold enhancement of the defects-related photocurrent. We show that hot electron injection (HEI) and plasmonic resonance energy transfer (PRET) jointly contribute to the observed photoconductivity enhancement. In addition to shedding light on the below-band-edge photoconductivity of TiO2, our work provides insight into new methods to probe and examine the surface defects of metal oxide semiconductors using plasmonic resonances.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: ACS Omega Año: 2024 Tipo del documento: Article País de afiliación: Irak Pais de publicación: Estados Unidos
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
Buscar en Google

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: ACS Omega Año: 2024 Tipo del documento: Article País de afiliación: Irak Pais de publicación: Estados Unidos