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Synthesis and Photoresponse of Large GaSe Atomic Layers
Abstract
We report the direct growth of large, atomically thin GaSe single crystals on insulating substrates by vapor phase mass transport. A correlation is identified between the number of layers and a Raman shift and intensity change. We found obvious contrast of the resistance of the material in the dark and when illuminated with visible light. In the photoconductivity measurement we observed a low dark current. The on-off ratio measured with a 405 nm at 0.5 mW/mm(2) light source is in the order of 10(3); the photoresponsivity is 17 mA/W, and the quantum efficiency is 5.2%, suggesting possibility for photodetector and sensor applications. The photocurrent spectrum of few-layer GaSe shows an intense blue shift of the excitation edge and expanded band gap compared with bulk material.
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Cited by
Li, S.-L., Tsukagoshi, K., Orgiu, E., & Samorì, P. (2016) · Chemical Society Reviews · doi:10.1039/c5cs00517e · Cited by 549
Xia, J., Huang, X., Liu, L.-Z., Wang, M., Wang, L., Huang, B., Zhu, D.-D., Li, J.-J., Gu, C.-Z., & Meng, X.-M. (2014) · Nanoscale · doi:10.1039/c4nr02311k · Cited by 468
Recent developments in 2D layered inorganic nanomaterials for sensing
Kannan, P. K., Late, D. J., Morgan, H., & Rout, C. S. (2015) · Nanoscale · doi:10.1039/c5nr03633j · Cited by 454
Structural and electronic properties of monolayer group III monochalcogenides
Demirci, S., Avazlı, N., Durgun, E., & Cahangirov, S. (2017) · Physical Review B · doi:10.1103/physrevb.95.115409 · Cited by 432
Controlled Synthesis of High-Quality Monolayered α-In2Se3 via Physical Vapor Deposition
Zhou, J., Zeng, Q., Lv, D., Sun, L., Niu, L., Fu, W., Liu, F., Shen, Z., Jin, C., & Liu, Z. (2015) · Nano Letters · doi:10.1021/acs.nanolett.5b01590 · Cited by 308
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Metadata
- Authors
- Lei, S., Ge, L., Liu, Z., Najmaei, S., Shi, G., You, G., Lou, J., Vajtai, R., & Ajayan, P. M.
- Venue
- Nano Letters
- Publisher
- American Chemical Society (ACS)
- Published
- 2013-06-03
- Volume
- 13
- Issue
- 6
- Pages
- 2777-2781
- ISSN
- 1530-6984 (ISSN-L)
- 1530-6992
- OpenAlex
- W2084762241
- Cited by
- 454
- References
- 0
- FWCI
- 15.69
- Type
- journal article
- Language
- en
- Open access
- closed
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- Lei, S., Ge, L., Liu, Z., Najmaei, S., Shi, G., You, G., Lou, J., Vajtai, R., & Ajayan, P. M. (2013). Synthesis and Photoresponse of Large GaSe Atomic Layers. Nano Letters. https://doi.org/10.1021/nl4010089
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