Ultrathin Ga<sub>2</sub>O<sub>3</sub> Photodetector with Fast Response and Trajectory Tracking Capability Fabricated by Liquid Metal Oxidation
Low-dimensional Ga<sub>2</sub>O<sub>3</sub> demonstrates a unique ultraviolet photoresponse and could be used in various electronic and optical systems. However, the low-dimensional Ga<sub>2</sub>O<sub>3</sub> photodetector is faced with the challenges of a complex preparation process and poor device performance. In this work, ultrathin Ga<sub>2</sub>O<sub>3</sub> layers with ∼7 nm thickness are prepared on quartz rods by UV exposure to liquid gallium. Benefiting from low-density oxygen vacancy defects cured by UV exposure, the low-dimensional Ga<sub>2</sub>O<sub>3</sub> photodetector exhibits a high response speed (rise: 64.7 μs; fall: 51.4 μs) and an exceptional linear dynamic range of 120 dB. Furthermore, the photodetector array based on these ultrathin Ga<sub>2</sub>O<sub>3</sub> shows an effective trajectory tracking capability by monitoring UV source motion. This work develops a simple preparation method to construct a low-dimensional UV photodetector array with fast response and useful trajectory tracking capability, exhibiting the significance of ultrathin Ga<sub>2</sub>O<sub>3</sub> in UV optoelectronics.
Authors
- Shibing Long (ORCID: https://orcid.org/0000-0001-6220-4461)
- Weiheng Zhong (ORCID: https://orcid.org/0000-0002-7902-3568)
- Hong Huang (ORCID: https://orcid.org/0000-0003-3694-601X)
- Wei Xin (ORCID: https://orcid.org/0000-0002-1887-7535)
- Yuqing Liu (ORCID: https://orcid.org/0000-0002-6324-1296)
- Zhaojie Sun
- Haiyang Xu (ORCID: https://orcid.org/0000-0001-6034-8736)
- Xiaolong Zhao (ORCID: https://orcid.org/0000-0003-2356-272X)
- Weizhen Yao Xianglin Liu (ORCID: https://orcid.org/0000-0001-9874-7169)
Institutions
- University of Science and Technology of China (CN)
- Northeast Normal University (CN)
- Ministry of Education (ET)
Publication Details
- Journal
- Nano Letters
- Published
- 2024-09-28
- DOI
- https://doi.org/10.1021/acs.nanolett.4c04030
- Citations
- 26
- Primary Topic
- Ga2O3 and related materials
- Type
- article
- Field-Weighted Citation Impact
- 3.07
Funders
- National Natural Science Foundation of China
- University of Science and Technology of China
- National Key Research and Development Program of China
- Jilin Scientific and Technological Development Program
- National Science Fund for Distinguished Young Scholars