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Acoustic phonon recycling for photocarrier generation in graphene-WS(2) heterostructures

Electron-phonon scattering is the key process limiting the efficiency of modern nanoelectronic and optoelectronic devices, in which most of the incident energy is converted to lattice heat and finally dissipates into the environment. Here, we report an acoustic phonon recycling process in graphene-W...

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Autores principales: Wei, Ke, Sui, Yizhen, Xu, Zhongjie, Kang, Yan, You, Jie, Tang, Yuxiang, Li, Han, Ma, Yating, Ouyang, Hao, Zheng, Xin, Cheng, Xiangai, Jiang, Tian
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7400626/
https://www.ncbi.nlm.nih.gov/pubmed/32747777
http://dx.doi.org/10.1038/s41467-020-17728-x
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author Wei, Ke
Sui, Yizhen
Xu, Zhongjie
Kang, Yan
You, Jie
Tang, Yuxiang
Li, Han
Ma, Yating
Ouyang, Hao
Zheng, Xin
Cheng, Xiangai
Jiang, Tian
author_facet Wei, Ke
Sui, Yizhen
Xu, Zhongjie
Kang, Yan
You, Jie
Tang, Yuxiang
Li, Han
Ma, Yating
Ouyang, Hao
Zheng, Xin
Cheng, Xiangai
Jiang, Tian
author_sort Wei, Ke
collection PubMed
description Electron-phonon scattering is the key process limiting the efficiency of modern nanoelectronic and optoelectronic devices, in which most of the incident energy is converted to lattice heat and finally dissipates into the environment. Here, we report an acoustic phonon recycling process in graphene-WS(2) heterostructures, which couples the heat generated in graphene back into the carrier distribution in WS(2). This recycling process is experimentally recorded by spectrally resolved transient absorption microscopy under a wide range of pumping energies from 1.77 to 0.48 eV and is also theoretically described using an interfacial thermal transport model. The acoustic phonon recycling process has a relatively slow characteristic time (>100 ps), which is beneficial for carrier extraction and distinct from the commonly found ultrafast hot carrier transfer (~1 ps) in graphene-WS(2) heterostructures. The combination of phonon recycling and carrier transfer makes graphene-based heterostructures highly attractive for broadband high-efficiency electronic and optoelectronic applications.
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spelling pubmed-74006262020-08-13 Acoustic phonon recycling for photocarrier generation in graphene-WS(2) heterostructures Wei, Ke Sui, Yizhen Xu, Zhongjie Kang, Yan You, Jie Tang, Yuxiang Li, Han Ma, Yating Ouyang, Hao Zheng, Xin Cheng, Xiangai Jiang, Tian Nat Commun Article Electron-phonon scattering is the key process limiting the efficiency of modern nanoelectronic and optoelectronic devices, in which most of the incident energy is converted to lattice heat and finally dissipates into the environment. Here, we report an acoustic phonon recycling process in graphene-WS(2) heterostructures, which couples the heat generated in graphene back into the carrier distribution in WS(2). This recycling process is experimentally recorded by spectrally resolved transient absorption microscopy under a wide range of pumping energies from 1.77 to 0.48 eV and is also theoretically described using an interfacial thermal transport model. The acoustic phonon recycling process has a relatively slow characteristic time (>100 ps), which is beneficial for carrier extraction and distinct from the commonly found ultrafast hot carrier transfer (~1 ps) in graphene-WS(2) heterostructures. The combination of phonon recycling and carrier transfer makes graphene-based heterostructures highly attractive for broadband high-efficiency electronic and optoelectronic applications. Nature Publishing Group UK 2020-08-03 /pmc/articles/PMC7400626/ /pubmed/32747777 http://dx.doi.org/10.1038/s41467-020-17728-x Text en © The Author(s) 2020 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
spellingShingle Article
Wei, Ke
Sui, Yizhen
Xu, Zhongjie
Kang, Yan
You, Jie
Tang, Yuxiang
Li, Han
Ma, Yating
Ouyang, Hao
Zheng, Xin
Cheng, Xiangai
Jiang, Tian
Acoustic phonon recycling for photocarrier generation in graphene-WS(2) heterostructures
title Acoustic phonon recycling for photocarrier generation in graphene-WS(2) heterostructures
title_full Acoustic phonon recycling for photocarrier generation in graphene-WS(2) heterostructures
title_fullStr Acoustic phonon recycling for photocarrier generation in graphene-WS(2) heterostructures
title_full_unstemmed Acoustic phonon recycling for photocarrier generation in graphene-WS(2) heterostructures
title_short Acoustic phonon recycling for photocarrier generation in graphene-WS(2) heterostructures
title_sort acoustic phonon recycling for photocarrier generation in graphene-ws(2) heterostructures
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7400626/
https://www.ncbi.nlm.nih.gov/pubmed/32747777
http://dx.doi.org/10.1038/s41467-020-17728-x
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