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- Publisher Website: 10.1021/acs.nanolett.7b00897
- Scopus: eid_2-s2.0-85020753906
- PMID: 28505461
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Article: Spatial-Temporal Imaging of Anisotropic Photocarrier Dynamics in Black Phosphorus
Title | Spatial-Temporal Imaging of Anisotropic Photocarrier Dynamics in Black Phosphorus |
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Authors | |
Keywords | anisotropy Black phosphorus hot carrier dynamics ultrafast electron microscopy |
Issue Date | 2017 |
Citation | Nano Letters, 2017, v. 17, n. 6, p. 3675-3680 How to Cite? |
Abstract | As an emerging single elemental layered material with a low symmetry in-plane crystal lattice, black phosphorus (BP) has attracted significant research interest owing to its unique electronic and optoelectronic properties, including its widely tunable bandgap, polarization-dependent photoresponse and highly anisotropic in-plane charge transport. Despite extensive study of the steady-state charge transport in BP, there has not been direct characterization and visualization of the hot carriers dynamics in BP immediately after photoexcitation, which is crucial to understanding the performance of BP-based optoelectronic devices. Here we use the newly developed scanning ultrafast electron microscopy (SUEM) to directly visualize the motion of photoexcited hot carriers on the surface of BP in both space and time. We observe highly anisotropic in-plane diffusion of hot holes with a 15 times higher diffusivity along the armchair (x-) direction than that along the zigzag (y-) direction. Our results provide direct evidence of anisotropic hot carrier transport in BP and demonstrate the capability of SUEM to resolve ultrafast hot carrier dynamics in layered two-dimensional materials. |
Persistent Identifier | http://hdl.handle.net/10722/335292 |
ISSN | 2021 Impact Factor: 12.262 2020 SCImago Journal Rankings: 4.853 |
DC Field | Value | Language |
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dc.contributor.author | Liao, Bolin | - |
dc.contributor.author | Zhao, Huan | - |
dc.contributor.author | Najafi, Ebrahim | - |
dc.contributor.author | Yan, Xiaodong | - |
dc.contributor.author | Tian, He | - |
dc.contributor.author | Tice, Jesse | - |
dc.contributor.author | Minnich, Austin J. | - |
dc.contributor.author | Wang, Han | - |
dc.contributor.author | Zewail, Ahmed H. | - |
dc.date.accessioned | 2023-11-17T08:24:40Z | - |
dc.date.available | 2023-11-17T08:24:40Z | - |
dc.date.issued | 2017 | - |
dc.identifier.citation | Nano Letters, 2017, v. 17, n. 6, p. 3675-3680 | - |
dc.identifier.issn | 1530-6984 | - |
dc.identifier.uri | http://hdl.handle.net/10722/335292 | - |
dc.description.abstract | As an emerging single elemental layered material with a low symmetry in-plane crystal lattice, black phosphorus (BP) has attracted significant research interest owing to its unique electronic and optoelectronic properties, including its widely tunable bandgap, polarization-dependent photoresponse and highly anisotropic in-plane charge transport. Despite extensive study of the steady-state charge transport in BP, there has not been direct characterization and visualization of the hot carriers dynamics in BP immediately after photoexcitation, which is crucial to understanding the performance of BP-based optoelectronic devices. Here we use the newly developed scanning ultrafast electron microscopy (SUEM) to directly visualize the motion of photoexcited hot carriers on the surface of BP in both space and time. We observe highly anisotropic in-plane diffusion of hot holes with a 15 times higher diffusivity along the armchair (x-) direction than that along the zigzag (y-) direction. Our results provide direct evidence of anisotropic hot carrier transport in BP and demonstrate the capability of SUEM to resolve ultrafast hot carrier dynamics in layered two-dimensional materials. | - |
dc.language | eng | - |
dc.relation.ispartof | Nano Letters | - |
dc.subject | anisotropy | - |
dc.subject | Black phosphorus | - |
dc.subject | hot carrier dynamics | - |
dc.subject | ultrafast electron microscopy | - |
dc.title | Spatial-Temporal Imaging of Anisotropic Photocarrier Dynamics in Black Phosphorus | - |
dc.type | Article | - |
dc.description.nature | link_to_subscribed_fulltext | - |
dc.identifier.doi | 10.1021/acs.nanolett.7b00897 | - |
dc.identifier.pmid | 28505461 | - |
dc.identifier.scopus | eid_2-s2.0-85020753906 | - |
dc.identifier.volume | 17 | - |
dc.identifier.issue | 6 | - |
dc.identifier.spage | 3675 | - |
dc.identifier.epage | 3680 | - |
dc.identifier.eissn | 1530-6992 | - |