Projects per year
Abstract
Because of the tunable bandgap, high carrier mobility and strong interaction with light, ternary III-V nanowires (NWs) have been demonstrated with tremendous potential for advanced electronics and optoelectronics. However, their further performance enhancement and practical implementation are still a challenge in the presence of kinked morphology and surface coating of the nanowires. Here, we report the development of high-performance near-infrared photodetectors based on high-quality InGaAs nanowires enabled by the two-step chemical vapor deposition method. Importantly, the optimized In0.51Ga0.49As NW devices exhibit excellent photodetector performance at room temperature, with a responsivity of 7300 A W-1, a specific detectivity of 4.2 × 1010 Jones and an external quantum efficiency of 5.84 × 106% under 1550 nm irradiation. The rise and decay time constants are as efficient as 480 μs and 810 μs, respectively, constituting a record high performance among all arsenide-based nanowire photodetectors. Large-scale NW parallel-arrayed devices are also fabricated to illustrate their promising potential for next-generation ultrafast high-responsivity near-infrared photodetectors.
| Original language | English |
|---|---|
| Pages (from-to) | 17025-17033 |
| Journal | Journal of Materials Chemistry C |
| Volume | 8 |
| Issue number | 47 |
| Online published | 22 Oct 2020 |
| DOIs | |
| Publication status | Published - 21 Dec 2020 |
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Dive into the research topics of 'Enhanced performance of near-infrared photodetectors based on InGaAs nanowires enabled by a two-step growth method'. Together they form a unique fingerprint.Projects
- 2 Finished
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GRF: Wearable Toxic Gas Sensors Based on Hybrid Integration of Multifunctional Nanomaterials
HO, J. C. Y. (Principal Investigator / Project Coordinator)
1/01/18 → 24/12/21
Project: Research
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TBRS: A Compact System for Terahertz Imaging and Spectroscopy
CHAN, C. H. (Principal Investigator / Project Coordinator), LO, K. W. K. (Co-Principal Investigator), LUK, K. M. (Co-Principal Investigator), PUN, Y. B. E. (Co-Principal Investigator), Pang, S. (Co-Principal Investigator), SHAW, J. (Co-Principal Investigator), VELLAISAMY, A. L. R. (Co-Principal Investigator), CHAN, S. C. (Co-Investigator), DECROZE, C. (Co-Investigator), HO, J. C. Y. (Co-Investigator), JARRAHI, M. (Co-Investigator), LAM, Y. W. (Co-Investigator), LEE, E.-Y. J. (Co-Investigator), LEE, N. P. Y. (Co-Investigator), LEUNG, K. W. (Co-Investigator), LIU, H. (Co-Investigator), QU, S. (Co-Investigator), RENAUD, C. (Co-Investigator), Tong, K. (Co-Investigator), WANG, C. (Co-Investigator), WONG, H. (Co-Investigator), WONG, C. Y. A. (Co-Investigator), WONG, M. H. A. (Co-Investigator) & Wong, K. K. Y. (Co-Investigator)
1/01/17 → 30/06/23
Project: Research