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Deep Ultraviolet to Near-Infrared Emission and Photoresponse in Layered N-Doped Graphene Quantum Dots
Abstract
Material that can emit broad spectral wavelengths covering deep ultraviolet, visible, and near-infrared is highly desirable. It can lead to important applications such as broadband modulators, photodetectors, solar cells, bioimaging, and fiber communications. However, there is currently no material that meets such desirable requirement. Here, we report the layered structure of nitrogen-doped graphene quantum dots (N-GQDs) which possess broadband emission ranging from 300 to >1000 nm. The broadband emission is attributed to the layered structure of the N-GQDs that contains a large conjugated system and provides extensive delocalized π electrons. In addition, a broadband photodetector with responsivity as high as 325 V/W is demonstrated by coating N-GQDs onto interdigital gold electrodes. The unusual negative photocurrent is observed which is attributed to the trapping sites induced by the self-passivated surface states in the N-GQDs.
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Cited by
Progress, Challenges, and Opportunities for 2D Material Based Photodetectors
Long, M., Wang, P., Fang, H., & Hu, W. (2019) · Advanced Functional Materials · doi:10.1002/adfm.201803807 · Cited by 1,598
Shining carbon dots: Synthesis and biomedical and optoelectronic applications
Yuan, F., Li, S., Fan, Z., Meng, X., Fan, L., & Yang, S. (2016) · Nano Today · doi:10.1016/j.nantod.2016.08.006 · Cited by 746
Near‐Infrared Excitation/Emission and Multiphoton‐Induced Fluorescence of Carbon Dots
Li, D., Jing, P., Sun, L., An, Y., Shan, X., Lu, X., Zhou, D., Han, D., Shen, D., Zhai, Y., et al. (2018) · Advanced Materials · doi:10.1002/adma.201705913 · Cited by 532
Excitation wavelength independent visible color emission of carbon dots
Wang, H., Sun, C., Chen, X., Zhang, Y., Colvin, V. L., Rice, Q., Seo, J., Feng, S., Wang, S., & Yu, W. W. (2017) · Nanoscale · doi:10.1039/c6nr09200d · Cited by 447
Bao, X., Yuan, Y., Chen, J., Zhang, B., Li, D., Zhou, D., Jing, P., Xu, G., Wang, Y., Holá, K., et al. (2018) · Light: Science & Applications · doi:10.1038/s41377-018-0090-1 · Cited by 445
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Metadata
- Authors
- Tang, L., Ji, R., Li, X., Bai, G., Liu, C. P., Hao, J., Lin, J., Jiang, H., Teng, K. S., Yang, Z., & Lau, S. P.
- Venue
- ACS Nano
- Publisher
- American Chemical Society (ACS)
- Published
- 2014-05-27
- Volume
- 8
- Issue
- 6
- Pages
- 6312-6320
- ISSN
- 1936-0851 (ISSN-L)
- 1936-086X
- OpenAlex
- W2321760976
- Cited by
- 551
- References
- 0
- FWCI
- 20.40
- Type
- journal article
- Language
- en
- Open access
- closed
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- Tang, L., Ji, R., Li, X., Bai, G., Liu, C. P., Hao, J., Lin, J., Jiang, H., Teng, K. S., Yang, Z., & Lau, S. P. (2014). Deep Ultraviolet to Near-Infrared Emission and Photoresponse in Layered N-Doped Graphene Quantum Dots. ACS Nano. https://doi.org/10.1021/nn501796r
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