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  Investigating photoresponsivity of graphene-silver hybrid nanomaterials in the ultraviolet

Deshpande, P., Suri, P., Jeong, H.-H., Fischer, P., Ghosh, A., & Ghosh, A. (2020). Investigating photoresponsivity of graphene-silver hybrid nanomaterials in the ultraviolet. The Journal of Chemical Physics, 152(4): 044709, pp. 044709-1-044709-7. doi:10.1063/1.5138722.

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Item Permalink: https://hdl.handle.net/21.11116/0000-000B-396F-A Version Permalink: https://hdl.handle.net/21.11116/0000-000B-3970-7
Genre: Journal Article

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 Creators:
Deshpande, Preeti, Author
Suri, Priyanka, Author
Jeong, Hyeon-Ho, Author
Fischer, Peer1, Author           
Ghosh, Arindam, Author
Ghosh, Ambarish, Author
Affiliations:
1Optical Nanoscopy, Max Planck Institute for Medical Research, Max Planck Society, ou_2364730              

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 Abstract: There have been several reports of plasmonically enhanced graphene photodetectors in the visible and the near infrared regime but rarely in the ultraviolet. In a previous work, we have reported that a graphene-silver hybrid structure shows a high photoresponsivity of 13 A/W at 270 nm. Here, we consider the likely mechanisms that underlie this strong photoresponse. We investigate the role of the plasmonic layer and examine the response using silver and gold nanoparticles of similar dimensions and spatial arrangement. The effect on local doping, strain, and absorption properties of the hybrid is also probed by photocurrent measurements and Raman and UV-visible spectroscopy. We find that the local doping from the silver nanoparticles is stronger than that from gold and correlates with a measured photosensitivity that is larger in devices with a higher contact area between the plasmonic nanomaterials and the graphene layer.

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Language(s): eng - English
 Dates: 2019-11-192019-12-292020-01-272020-01-31
 Publication Status: Issued
 Pages: 7
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 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1063/1.5138722
BibTex Citekey: Ghosh2020
URI: https://pubmed.ncbi.nlm.nih.gov/32007076/
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Title: The Journal of Chemical Physics
  Abbreviation : J. Chem. Phys.
Source Genre: Journal
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Publ. Info: Woodbury, N.Y. : American Institute of Physics
Pages: - Volume / Issue: 152 (4) Sequence Number: 044709 Start / End Page: 044709-1 - 044709-7 Identifier: ISSN: 0021-9606
CoNE: https://pure.mpg.de/cone/journals/resource/954922836226