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Hybrid graphene–quantum dot phototransistors with ultrahigh gain
Abstract
Graphene is an attractive material for optoelectronics and photodetection applications because it offers a broad spectral bandwidth and fast response times. However, weak light absorption and the absence of a gain mechanism that can generate multiple charge carriers from one incident photon have limited the responsivity of graphene-based photodetectors to ∼10(-2) A W(-1). Here, we demonstrate a gain of ∼10(8) electrons per photon and a responsivity of ∼10(7) A W(-1) in a hybrid photodetector that consists of monolayer or bilayer graphene covered with a thin film of colloidal quantum dots. Strong and tunable light absorption in the quantum-dot layer creates electric charges that are transferred to the graphene, where they recirculate many times due to the high charge mobility of graphene and long trapped-charge lifetimes in the quantum-dot layer. The device, with a specific detectivity of 7 × 10(13) Jones, benefits from gate-tunable sensitivity and speed, spectral selectivity from the short-wavelength infrared to the visible, and compatibility with current circuit technologies.
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Cites
Graphene photodetectors for high-speed optical communications
Mueller, T., Xia, F., & Avouris, P. (2010) · Nature Photonics · doi:10.1038/nphoton.2010.40 · Cited by 2,474
Cited by
Photodetectors based on graphene, other two-dimensional materials and hybrid systems
Koppens, F. H. L., Mueller, T., Avouris, P., Ferrari, A. C., Vitiello, M. S., & Polini, M. (2014) · Nature Nanotechnology · doi:10.1038/nnano.2014.215 · Cited by 3,828
Self-citationEmerging Device Applications for Semiconducting Two-Dimensional Transition Metal Dichalcogenides
Jariwala, D., Sangwan, V. K., Lauhon, L. J., Marks, T. J., & Hersam, M. C. (2014) · ACS Nano · doi:10.1021/nn500064s · Cited by 2,753
Georgakilas, V., Perman, J. A., Tucek, J., & Zboril, R. (2015) · Chemical Reviews · doi:10.1021/cr500304f · Cited by 2,147
Van der Waals integration before and beyond two-dimensional materials
Liu, Y., Huang, Y., & Duan, X. (2019) · Nature · doi:10.1038/s41586-019-1013-x · Cited by 1,541
Solution-processed semiconductors for next-generation photodetectors
García de Arquer, F. P., Armin, A., Meredith, P., & Sargent, E. H. (2017) · Nature Reviews Materials · doi:10.1038/natrevmats.2016.100 · Cited by 1,529
Metadata
- Authors
- Konstantatos, G., Badioli, M., Gaudreau, L., Osmond, J., Bernechea, M., de Arquer, F. P. G., Gatti, F., & Koppens, F. H. L.
- Venue
- Nature Nanotechnology
- Published
- 2012-05-06
- Volume
- 7
- Issue
- 6
- Pages
- 363-368
- ISSN
- 1748-3387 (ISSN-L)
- 1748-3395
- OpenAlex
- W2170276498
- Cited by
- 2,315
- References
- 1
- FWCI
- 54.01
- Type
- journal article
- Language
- en
- Open access
- closed
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- Konstantatos, G., Badioli, M., Gaudreau, L., Osmond, J., Bernechea, M., de Arquer, F. P. G., Gatti, F., & Koppens, F. H. L. (2012). Hybrid graphene–quantum dot phototransistors with ultrahigh gain. Nature Nanotechnology. https://doi.org/10.1038/nnano.2012.60
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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
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