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Graphene/GaSe-Nanosheet Hybrid: Towards High Gain and Fast Photoresponse
While high photoconductive gain has been recently achieved in graphene-based hybrid phototransistors using semiconductor two-dimensional transition/post-transition metal dichalcogenides or quantum dots sensitizers, obtaining fast photoresponse simutaneously remains a challenge that must be addressed...
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group
2016
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4726015/ https://www.ncbi.nlm.nih.gov/pubmed/26776942 http://dx.doi.org/10.1038/srep19161 |
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author | Lu, Rongtao Liu, Jianwei Luo, Hongfu Chikan, Viktor Wu, Judy Z. |
author_facet | Lu, Rongtao Liu, Jianwei Luo, Hongfu Chikan, Viktor Wu, Judy Z. |
author_sort | Lu, Rongtao |
collection | PubMed |
description | While high photoconductive gain has been recently achieved in graphene-based hybrid phototransistors using semiconductor two-dimensional transition/post-transition metal dichalcogenides or quantum dots sensitizers, obtaining fast photoresponse simutaneously remains a challenge that must be addressed for practical applications. In this paper we report a graphene/GaSe nanosheets hybrid photodetector, in which GaSe nanosheets provide a favorable geometric link to graphene conductive layer through van Der Waals force. After a vacuum annealing process, a high gain in exceeding 10(7) has been obtained simitaneously with a dynamic response time of around 10 ms for both light on and off. We attribute the high performance to the elimination of possible deep charge traps, most probably at the graphene/GaSe nanosheets interface. This result demonstrates high photoconductive gain and fast photoresponse can be achieved simultaneously and a clean interface is the key to the high performance of these hybrid devices. |
format | Online Article Text |
id | pubmed-4726015 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2016 |
publisher | Nature Publishing Group |
record_format | MEDLINE/PubMed |
spelling | pubmed-47260152016-01-28 Graphene/GaSe-Nanosheet Hybrid: Towards High Gain and Fast Photoresponse Lu, Rongtao Liu, Jianwei Luo, Hongfu Chikan, Viktor Wu, Judy Z. Sci Rep Article While high photoconductive gain has been recently achieved in graphene-based hybrid phototransistors using semiconductor two-dimensional transition/post-transition metal dichalcogenides or quantum dots sensitizers, obtaining fast photoresponse simutaneously remains a challenge that must be addressed for practical applications. In this paper we report a graphene/GaSe nanosheets hybrid photodetector, in which GaSe nanosheets provide a favorable geometric link to graphene conductive layer through van Der Waals force. After a vacuum annealing process, a high gain in exceeding 10(7) has been obtained simitaneously with a dynamic response time of around 10 ms for both light on and off. We attribute the high performance to the elimination of possible deep charge traps, most probably at the graphene/GaSe nanosheets interface. This result demonstrates high photoconductive gain and fast photoresponse can be achieved simultaneously and a clean interface is the key to the high performance of these hybrid devices. Nature Publishing Group 2016-01-18 /pmc/articles/PMC4726015/ /pubmed/26776942 http://dx.doi.org/10.1038/srep19161 Text en Copyright © 2016, Macmillan Publishers Limited http://creativecommons.org/licenses/by/4.0/ This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ |
spellingShingle | Article Lu, Rongtao Liu, Jianwei Luo, Hongfu Chikan, Viktor Wu, Judy Z. Graphene/GaSe-Nanosheet Hybrid: Towards High Gain and Fast Photoresponse |
title | Graphene/GaSe-Nanosheet Hybrid: Towards High Gain and Fast Photoresponse |
title_full | Graphene/GaSe-Nanosheet Hybrid: Towards High Gain and Fast Photoresponse |
title_fullStr | Graphene/GaSe-Nanosheet Hybrid: Towards High Gain and Fast Photoresponse |
title_full_unstemmed | Graphene/GaSe-Nanosheet Hybrid: Towards High Gain and Fast Photoresponse |
title_short | Graphene/GaSe-Nanosheet Hybrid: Towards High Gain and Fast Photoresponse |
title_sort | graphene/gase-nanosheet hybrid: towards high gain and fast photoresponse |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4726015/ https://www.ncbi.nlm.nih.gov/pubmed/26776942 http://dx.doi.org/10.1038/srep19161 |
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