Ga2O3 Solar-Blind Deep-Ultraviolet Photodetectors with a Suspended Structure for High Responsivity and High-Speed Applications
The wide-bandgap semiconductor material Ga2O3 exhibits great potential in solar-blind deep-ultraviolet (DUV) photodetection applications, including none-line-of-sight secure optical communication, fire warning, high-voltage electricity monitoring, and maritime fog dispersion navigation. However, Ga2...
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| Format: | Article |
| Language: | English |
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American Association for the Advancement of Science (AAAS)
2024-01-01
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| Series: | Research |
| Online Access: | https://spj.science.org/doi/10.34133/research.0546 |
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| author | Xiaoxi Li Zhifan Wu Yuan Fang Shuqi Huang Cizhe Fang Yibo Wang Xiangyu Zeng Yingguo Yang Yue Hao Yan Liu Genquan Han |
| author_facet | Xiaoxi Li Zhifan Wu Yuan Fang Shuqi Huang Cizhe Fang Yibo Wang Xiangyu Zeng Yingguo Yang Yue Hao Yan Liu Genquan Han |
| author_sort | Xiaoxi Li |
| collection | DOAJ |
| description | The wide-bandgap semiconductor material Ga2O3 exhibits great potential in solar-blind deep-ultraviolet (DUV) photodetection applications, including none-line-of-sight secure optical communication, fire warning, high-voltage electricity monitoring, and maritime fog dispersion navigation. However, Ga2O3 photodetectors have traditionally faced challenges in achieving both high responsivity and fast response time, limiting their practical application. Herein, the Ga2O3 solar-blind DUV photodetectors with a suspended structure have been constructed for the first time. The photodetector exhibits a high responsivity of 1.51 × 1010 A/W, a sensitive detectivity of 6.01 × 1017 Jones, a large external quantum efficiency of 7.53 × 1012 %, and a fast rise time of 180 ms under 250-nm illumination. Notably, the photodetector achieves both high responsivity and fast response time simultaneously under ultra-weak power intensity excitation of 0.01 μW/cm2. This important improvement is attributed to the reduction of interface defects, improved carrier transport, efficient carrier separation, and enhanced light absorption enabled by the suspended structure. This work provides valuable insights for designing and optimizing high-performance Ga2O3 solar-blind photodetectors. |
| format | Article |
| id | doaj-art-d9365d23889c47efb87ebd5f650d36ae |
| institution | Kabale University |
| issn | 2639-5274 |
| language | English |
| publishDate | 2024-01-01 |
| publisher | American Association for the Advancement of Science (AAAS) |
| record_format | Article |
| series | Research |
| spelling | doaj-art-d9365d23889c47efb87ebd5f650d36ae2024-12-11T08:00:32ZengAmerican Association for the Advancement of Science (AAAS)Research2639-52742024-01-01710.34133/research.0546Ga2O3 Solar-Blind Deep-Ultraviolet Photodetectors with a Suspended Structure for High Responsivity and High-Speed ApplicationsXiaoxi Li0Zhifan Wu1Yuan Fang2Shuqi Huang3Cizhe Fang4Yibo Wang5Xiangyu Zeng6Yingguo Yang7Yue Hao8Yan Liu9Genquan Han10Hangzhou Institute of Technology, Xidian University, Hangzhou 311200, China.Hangzhou Institute of Technology, Xidian University, Hangzhou 311200, China.Hangzhou Institute of Technology, Xidian University, Hangzhou 311200, China.Hangzhou Institute of Technology, Xidian University, Hangzhou 311200, China.Hangzhou Institute of Technology, Xidian University, Hangzhou 311200, China.Hangzhou Institute of Technology, Xidian University, Hangzhou 311200, China.Hangzhou Institute of Technology, Xidian University, Hangzhou 311200, China.State Key Laboratory of ASIC and System, Shanghai Institute of Intelligent Electronics & Systems, School of Microelectronics, Fudan University, Shanghai 200433, China.Hangzhou Institute of Technology, Xidian University, Hangzhou 311200, China.Hangzhou Institute of Technology, Xidian University, Hangzhou 311200, China.Hangzhou Institute of Technology, Xidian University, Hangzhou 311200, China.The wide-bandgap semiconductor material Ga2O3 exhibits great potential in solar-blind deep-ultraviolet (DUV) photodetection applications, including none-line-of-sight secure optical communication, fire warning, high-voltage electricity monitoring, and maritime fog dispersion navigation. However, Ga2O3 photodetectors have traditionally faced challenges in achieving both high responsivity and fast response time, limiting their practical application. Herein, the Ga2O3 solar-blind DUV photodetectors with a suspended structure have been constructed for the first time. The photodetector exhibits a high responsivity of 1.51 × 1010 A/W, a sensitive detectivity of 6.01 × 1017 Jones, a large external quantum efficiency of 7.53 × 1012 %, and a fast rise time of 180 ms under 250-nm illumination. Notably, the photodetector achieves both high responsivity and fast response time simultaneously under ultra-weak power intensity excitation of 0.01 μW/cm2. This important improvement is attributed to the reduction of interface defects, improved carrier transport, efficient carrier separation, and enhanced light absorption enabled by the suspended structure. This work provides valuable insights for designing and optimizing high-performance Ga2O3 solar-blind photodetectors.https://spj.science.org/doi/10.34133/research.0546 |
| spellingShingle | Xiaoxi Li Zhifan Wu Yuan Fang Shuqi Huang Cizhe Fang Yibo Wang Xiangyu Zeng Yingguo Yang Yue Hao Yan Liu Genquan Han Ga2O3 Solar-Blind Deep-Ultraviolet Photodetectors with a Suspended Structure for High Responsivity and High-Speed Applications Research |
| title | Ga2O3 Solar-Blind Deep-Ultraviolet Photodetectors with a Suspended Structure for High Responsivity and High-Speed Applications |
| title_full | Ga2O3 Solar-Blind Deep-Ultraviolet Photodetectors with a Suspended Structure for High Responsivity and High-Speed Applications |
| title_fullStr | Ga2O3 Solar-Blind Deep-Ultraviolet Photodetectors with a Suspended Structure for High Responsivity and High-Speed Applications |
| title_full_unstemmed | Ga2O3 Solar-Blind Deep-Ultraviolet Photodetectors with a Suspended Structure for High Responsivity and High-Speed Applications |
| title_short | Ga2O3 Solar-Blind Deep-Ultraviolet Photodetectors with a Suspended Structure for High Responsivity and High-Speed Applications |
| title_sort | ga2o3 solar blind deep ultraviolet photodetectors with a suspended structure for high responsivity and high speed applications |
| url | https://spj.science.org/doi/10.34133/research.0546 |
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