Improved photoresponse with enhanced photoelectric contribution in fully suspended graphene photodetectors
Abstract
Graphene’s unique optoelectronic properties are promising to realize photodetectors with ultrafast photoresponse over a wide spectral range from far-infrared to ultraviolet radiation. The underlying mechanism of the photoresponse has been a particular focus of recent work and was found to be either photoelectric or photo-thermoelectric in nature and enhanced by hot carrier effects. Graphene supported by a substrate was found to be dominated by the photo-thermoelectric effect, which is known to be an order of magnitude slower than the photoelectric effect. Here we demonstrate fully-suspended chemical vapor deposition grown graphene microribbon arrays that are dominated by the faster photoelectric effect. Substrate removal was found to enhance the photoresponse by four-fold compared to substrate-supported microribbons. Furthermore, we show that the light-current input/output curves give valuable information about the underlying photophysical process responsible for the generated photocurrent. These findings are promising towards wafer-scale fabrication of graphene photodetectors approaching THz cut-off frequencies.
- Authors:
-
- Stevens Inst. of Technology Castle Point on the Hudson, Hoboken, NJ (United States). Dept. of Mechanical Engineering
- Stevens Inst. of Technology Castle Point on the Hudson, Hoboken, NJ (United States). Dept. of Physics and Engineering Physics
- Stevens Inst. of Technology Castle Point on the Hudson, Hoboken, NJ (United States).
- Publication Date:
- Research Org.:
- Brookhaven National Laboratory (BNL), Upton, NY (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division
- OSTI Identifier:
- 1624655
- Grant/Contract Number:
- AC02-98CH10886
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Scientific Reports
- Additional Journal Information:
- Journal Volume: 3; Journal Issue: 1; Journal ID: ISSN 2045-2322
- Publisher:
- Nature Publishing Group
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; Science & Technology - Other Topics; OPTICAL PROPERTIES AND DEVICES; OPTICAL PHYSICS
Citation Formats
Patil, Vikram, Capone, Aaron, Strauf, Stefan, and Yang, Eui-Hyeok. Improved photoresponse with enhanced photoelectric contribution in fully suspended graphene photodetectors. United States: N. p., 2013.
Web. doi:10.1038/srep02791.
Patil, Vikram, Capone, Aaron, Strauf, Stefan, & Yang, Eui-Hyeok. Improved photoresponse with enhanced photoelectric contribution in fully suspended graphene photodetectors. United States. https://doi.org/10.1038/srep02791
Patil, Vikram, Capone, Aaron, Strauf, Stefan, and Yang, Eui-Hyeok. Fri .
"Improved photoresponse with enhanced photoelectric contribution in fully suspended graphene photodetectors". United States. https://doi.org/10.1038/srep02791. https://www.osti.gov/servlets/purl/1624655.
@article{osti_1624655,
title = {Improved photoresponse with enhanced photoelectric contribution in fully suspended graphene photodetectors},
author = {Patil, Vikram and Capone, Aaron and Strauf, Stefan and Yang, Eui-Hyeok},
abstractNote = {Graphene’s unique optoelectronic properties are promising to realize photodetectors with ultrafast photoresponse over a wide spectral range from far-infrared to ultraviolet radiation. The underlying mechanism of the photoresponse has been a particular focus of recent work and was found to be either photoelectric or photo-thermoelectric in nature and enhanced by hot carrier effects. Graphene supported by a substrate was found to be dominated by the photo-thermoelectric effect, which is known to be an order of magnitude slower than the photoelectric effect. Here we demonstrate fully-suspended chemical vapor deposition grown graphene microribbon arrays that are dominated by the faster photoelectric effect. Substrate removal was found to enhance the photoresponse by four-fold compared to substrate-supported microribbons. Furthermore, we show that the light-current input/output curves give valuable information about the underlying photophysical process responsible for the generated photocurrent. These findings are promising towards wafer-scale fabrication of graphene photodetectors approaching THz cut-off frequencies.},
doi = {10.1038/srep02791},
journal = {Scientific Reports},
number = 1,
volume = 3,
place = {United States},
year = {Fri Sep 27 00:00:00 EDT 2013},
month = {Fri Sep 27 00:00:00 EDT 2013}
}
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