ArticleNature nanotechnology2017
Photo-excited hot carrier dynamics in hydrogenated amorphous silicon imaged by 4D electron microscopy.
Article in Nature nanotechnology, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 12 papers.
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Who cites it
12 citing papers in PubMed, 74 citations in OpenAlex.
- Optical-cavity-driven photogenerated charge separation revealed by spatiotemporal imaging.National science review · 2026Article
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- Progress in the development of an ultrafast pulsed ponderomotive phase plate for cryo-electron tomography.Structural dynamics (Melville, N.Y.) · 2025Article
- Real-space imaging of photo-generated surface carrier transport in 2D perovskites.Light, science & applications · 2025Article
- Imaging hot photocarrier transfer across a semiconductor heterojunction with ultrafast electron microscopy.Proceedings of the National Academy of Sciences of the United States of America · 2024Article
- Surface photovoltage microscopy for mapping charge separation on photocatalyst particles.Nature protocols · 2024Review
- A Femtosecond Electron-Based Versatile Microscopy for Visualizing Carrier Dynamics in Semiconductors Across Spatiotemporal and Energetic Domains.Advanced science (Weinheim, Baden-Wurttemberg, Germany) · 2024Article
- Article
- Lock-in Ultrafast Electron Microscopy Simultaneously Visualizes Carrier Recombination and Interface-Mediated Trapping.The journal of physical chemistry letters · 2020Article
- Ultrafast electron imaging of surface charge carrier dynamics at low voltage.Structural dynamics (Melville, N.Y.) · 2020Article
- Pulling apart photoexcited electrons by photoinducing an in-plane surface electric field.Science advances · 2018Article
- Overcoming diffusion-related limitations in semiconductor defect imaging with phonon-plasmon-coupled mode Raman scattering.Light, science & applications · 2018Article
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Authors and funding
5 authors at 1 institution in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Charge carrier dynamics in amorphous semiconductors has been a topic of intense research that has been propelled by modern applications in thin-film solar cells, transistors and optical sensors. Charge transport in these materials differs fundamentally from that in crystalline semiconductors owing to the lack of long-range order and high defect density. Despite the existence of well-established experimental techniques such as photoconductivity time-of-flight and ultrafast optical measurements, many aspects of the dynamics of photo-excited charge carriers in amorphous semiconductors remain poorly understood. Here, we demonstrate direct imaging of carrier dynamics in space and time after photo-excitation in hydrogenated amorphous silicon (a-Si:H) by scanning ultrafast electron microscopy (SUEM). We observe an unexpected regime of fast diffusion immediately after photoexcitation, together with spontaneous electron-hole separation and charge trapping induced by the atomic disorder. Our findings demonstrate the rich dynamics of hot carrier transport in amorphous semiconductors that can be revealed by direct imaging based on SUEM.
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