Persistent plasmonic photoconductivity of graphene on silver nanoparticles coated SiO2/Si

Kengchih Liang, Chun Cheng Chang, Chih Yi Liu, Yon-Hua Tzeng

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Effects of plasmonic coupling on blue laser induced positive and negative photoconductivity of chemically vapor deposited mono-layer graphene transferred onto SiO2/Si with or without silver nanoparticles in ambient atmosphere are reported. Ggraphene on silver nanoparticles coated SiO 2/Si exhibits negative and rapidly decreasing photoconductivity upon light illumination. The photoconductivity recovers gradually and then become positive photoconductivity. In the subsequent on-off cycles of light illumination, the graphene exhibits positive photoconductivity. Graphene on SiO2/Si without silver nanoparticles also exhibits negative and rapidly decreasing photoconductivity upon light illumination followed by a gradual increase in conductivity. However, the negative photoconductivity persists for a test period longer than 30 hours when light is turned on and off. Adverse effects on electrical conductivity due to electron scattering by surface and interfacial charges, decrease in surface dopants due to desorption induced by incident photons, plasmonic coupling induced local electromagnetic fields combined with enhanced electron transport between silver nanoparticles, and photon generated electron-hole pairs in silicon contribute to the measured photoconductivity. Annealing by electrical current and Joule heating adds to the complexity of the observed effects of current density on positive and negative persistent photoconductivity.

Original languageEnglish
Title of host publication2012 12th IEEE International Conference on Nanotechnology, NANO 2012
DOIs
Publication statusPublished - 2012 Nov 22
Event2012 12th IEEE International Conference on Nanotechnology, NANO 2012 - Birmingham, United Kingdom
Duration: 2012 Aug 202012 Aug 23

Publication series

NameProceedings of the IEEE Conference on Nanotechnology
ISSN (Print)1944-9399
ISSN (Electronic)1944-9380

Other

Other2012 12th IEEE International Conference on Nanotechnology, NANO 2012
CountryUnited Kingdom
CityBirmingham
Period12-08-2012-08-23

Fingerprint

Graphite
Photoconductivity
Silver
photoconductivity
Graphene
graphene
silver
Nanoparticles
nanoparticles
Lighting
illumination
Photons
Joule heating
Electron scattering
photons
Silicon
Electromagnetic fields
Desorption
electron scattering
electromagnetic fields

All Science Journal Classification (ASJC) codes

  • Bioengineering
  • Electrical and Electronic Engineering
  • Materials Chemistry
  • Condensed Matter Physics

Cite this

Liang, K., Chang, C. C., Liu, C. Y., & Tzeng, Y-H. (2012). Persistent plasmonic photoconductivity of graphene on silver nanoparticles coated SiO2/Si. In 2012 12th IEEE International Conference on Nanotechnology, NANO 2012 [6322045] (Proceedings of the IEEE Conference on Nanotechnology). https://doi.org/10.1109/NANO.2012.6322045
Liang, Kengchih ; Chang, Chun Cheng ; Liu, Chih Yi ; Tzeng, Yon-Hua. / Persistent plasmonic photoconductivity of graphene on silver nanoparticles coated SiO2/Si. 2012 12th IEEE International Conference on Nanotechnology, NANO 2012. 2012. (Proceedings of the IEEE Conference on Nanotechnology).
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abstract = "Effects of plasmonic coupling on blue laser induced positive and negative photoconductivity of chemically vapor deposited mono-layer graphene transferred onto SiO2/Si with or without silver nanoparticles in ambient atmosphere are reported. Ggraphene on silver nanoparticles coated SiO 2/Si exhibits negative and rapidly decreasing photoconductivity upon light illumination. The photoconductivity recovers gradually and then become positive photoconductivity. In the subsequent on-off cycles of light illumination, the graphene exhibits positive photoconductivity. Graphene on SiO2/Si without silver nanoparticles also exhibits negative and rapidly decreasing photoconductivity upon light illumination followed by a gradual increase in conductivity. However, the negative photoconductivity persists for a test period longer than 30 hours when light is turned on and off. Adverse effects on electrical conductivity due to electron scattering by surface and interfacial charges, decrease in surface dopants due to desorption induced by incident photons, plasmonic coupling induced local electromagnetic fields combined with enhanced electron transport between silver nanoparticles, and photon generated electron-hole pairs in silicon contribute to the measured photoconductivity. Annealing by electrical current and Joule heating adds to the complexity of the observed effects of current density on positive and negative persistent photoconductivity.",
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Liang, K, Chang, CC, Liu, CY & Tzeng, Y-H 2012, Persistent plasmonic photoconductivity of graphene on silver nanoparticles coated SiO2/Si. in 2012 12th IEEE International Conference on Nanotechnology, NANO 2012., 6322045, Proceedings of the IEEE Conference on Nanotechnology, 2012 12th IEEE International Conference on Nanotechnology, NANO 2012, Birmingham, United Kingdom, 12-08-20. https://doi.org/10.1109/NANO.2012.6322045

Persistent plasmonic photoconductivity of graphene on silver nanoparticles coated SiO2/Si. / Liang, Kengchih; Chang, Chun Cheng; Liu, Chih Yi; Tzeng, Yon-Hua.

2012 12th IEEE International Conference on Nanotechnology, NANO 2012. 2012. 6322045 (Proceedings of the IEEE Conference on Nanotechnology).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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AB - Effects of plasmonic coupling on blue laser induced positive and negative photoconductivity of chemically vapor deposited mono-layer graphene transferred onto SiO2/Si with or without silver nanoparticles in ambient atmosphere are reported. Ggraphene on silver nanoparticles coated SiO 2/Si exhibits negative and rapidly decreasing photoconductivity upon light illumination. The photoconductivity recovers gradually and then become positive photoconductivity. In the subsequent on-off cycles of light illumination, the graphene exhibits positive photoconductivity. Graphene on SiO2/Si without silver nanoparticles also exhibits negative and rapidly decreasing photoconductivity upon light illumination followed by a gradual increase in conductivity. However, the negative photoconductivity persists for a test period longer than 30 hours when light is turned on and off. Adverse effects on electrical conductivity due to electron scattering by surface and interfacial charges, decrease in surface dopants due to desorption induced by incident photons, plasmonic coupling induced local electromagnetic fields combined with enhanced electron transport between silver nanoparticles, and photon generated electron-hole pairs in silicon contribute to the measured photoconductivity. Annealing by electrical current and Joule heating adds to the complexity of the observed effects of current density on positive and negative persistent photoconductivity.

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Liang K, Chang CC, Liu CY, Tzeng Y-H. Persistent plasmonic photoconductivity of graphene on silver nanoparticles coated SiO2/Si. In 2012 12th IEEE International Conference on Nanotechnology, NANO 2012. 2012. 6322045. (Proceedings of the IEEE Conference on Nanotechnology). https://doi.org/10.1109/NANO.2012.6322045