Black, A., Urbanos, F.J., Roberts, J. et al. (7 more authors) (2019) Photodetecting heterostructures from graphene and encapsulated colloidal quantum dot films. ACS Omega, 4 (14). pp. 15824-15828.
Abstract
Heterostructure devices consisting of graphene and colloidal quantum dots (QDs) have been remarkably successful as photodetectors and have opened the door to technological applications based on the combination of these low-dimensional materials. This work explores the photodetection properties of a heterostructure consisting of a graphene field effect transistor covered by a film of silica-encapsulated colloidal QDs. Defects at the surface of the silica shell trap optically excited charge carriers, which simultaneously enables photodetection via two mechanisms: photogating, resulting in a net p-doping of the device, and Coulombic scattering of charge carriers in the graphene, producing an overall decrease in the current magnitude.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2019 American Chemcial Society. ACS AuthorChoice - This is an open access article published under an ACS AuthorChoice (http://pubs.acs.org/page/policy/authorchoice_termsofuse.html) which permits copying and redistribution of the article or any adaptations for non-commercial purposes. |
Dates: |
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Institution: | The University of Sheffield |
Academic Units: | The University of Sheffield > Sheffield Teaching Hospitals |
Depositing User: | Symplectic Sheffield |
Date Deposited: | 06 Nov 2019 11:56 |
Last Modified: | 06 Nov 2019 12:00 |
Status: | Published |
Publisher: | American Chemical Society (ACS) |
Refereed: | Yes |
Identification Number: | 10.1021/acsomega.9b01449 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:152352 |