Stable, high-performance vertical heterojunction ultraviolet photodetectors with Ga2O3-protected Ag nanowires window electrode
Large-scale ultraviolet photodetectors are highly promising for detection of weak signals and have the potential for widespread applications in high-tech areas such as aerospace detection and wearable devices. However, the commonly used window electrodes lack transparency to ultraviolet light. Altho...
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| Format: | Article |
| Language: | English |
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KeAi Communications Co., Ltd.
2025-08-01
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| Series: | ChemPhysMater |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2772571525000178 |
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| author | Xingyuan Yu Yujie Peng Di Zhang Fuqiang Zhai Hua Tang Jiang Cheng Lu Li Xin Yang Feng Cheng |
| author_facet | Xingyuan Yu Yujie Peng Di Zhang Fuqiang Zhai Hua Tang Jiang Cheng Lu Li Xin Yang Feng Cheng |
| author_sort | Xingyuan Yu |
| collection | DOAJ |
| description | Large-scale ultraviolet photodetectors are highly promising for detection of weak signals and have the potential for widespread applications in high-tech areas such as aerospace detection and wearable devices. However, the commonly used window electrodes lack transparency to ultraviolet light. Although ultraviolet photodetectors based on Ag nanowires exhibit good response due to their broad transparency range, the sharp interface between the Ag nanowires and the semiconductor renders them extremely unstable. Surface protection is considered to enhance the stability and lifespan of these devices. Our research has revealed that amorphous Ga2O3 can fully encapsulate the surface of Ag nanowires and securely affix it to the NiO film, resulting in a stable performance with a high responsivity of 48 mA W−1 and detectivity of 6.1 × 1011 Jones for 254 nm light. The unpacked device exhibited a stable photocurrent, showing only 6.8% degradation after 3 months in ambient air. Finally, a large-scale (5 cm × 4 cm, with 12 cm2 of active area) ultraviolet photodetector with a Ga2O3-protected Ag nanowire electrode was prepared, which demonstrated a milliamp-level photocurrent under weak ultraviolet illumination that can be directly read by a conventional multimeter in practical scenarios, indicating the promising prospects of this device for future commercial applications. |
| format | Article |
| id | doaj-art-8467bdfdc96c47fca5a3d92a6696031b |
| institution | Kabale University |
| issn | 2772-5715 |
| language | English |
| publishDate | 2025-08-01 |
| publisher | KeAi Communications Co., Ltd. |
| record_format | Article |
| series | ChemPhysMater |
| spelling | doaj-art-8467bdfdc96c47fca5a3d92a6696031b2025-08-20T03:25:29ZengKeAi Communications Co., Ltd.ChemPhysMater2772-57152025-08-014331332010.1016/j.chphma.2025.02.004Stable, high-performance vertical heterojunction ultraviolet photodetectors with Ga2O3-protected Ag nanowires window electrodeXingyuan Yu0Yujie Peng1Di Zhang2Fuqiang Zhai3Hua Tang4Jiang Cheng5Lu Li6Xin Yang7Feng Cheng8School of Materials Science and Engineering, Chongqing University of Arts and Sciences, Chongqing 402160, ChinaSchool of Materials Science and Engineering, Chongqing University of Arts and Sciences, Chongqing 402160, ChinaSchool of Materials Science and Engineering, Chongqing University of Arts and Sciences, Chongqing 402160, ChinaSchool of Materials Science and Engineering, Chongqing University of Arts and Sciences, Chongqing 402160, ChinaSchool of Materials Science and Engineering, Chongqing University of Arts and Sciences, Chongqing 402160, ChinaSchool of Materials Science and Engineering, Chongqing University of Arts and Sciences, Chongqing 402160, China; College of Energy Storage Technology, Shandong University of Science and Technology, Qingdao 266590, China; Corresponding authors.School of Materials Science and Engineering, Chongqing University of Arts and Sciences, Chongqing 402160, ChinaCollege of Energy Storage Technology, Shandong University of Science and Technology, Qingdao 266590, China; Corresponding authors.Key Laboratory of Structure and Functional Regulation of Hybrid Materials of Ministry of Education, Institutes of Physical Science and Information Technology, Anhui University, Hefei 230601, ChinaLarge-scale ultraviolet photodetectors are highly promising for detection of weak signals and have the potential for widespread applications in high-tech areas such as aerospace detection and wearable devices. However, the commonly used window electrodes lack transparency to ultraviolet light. Although ultraviolet photodetectors based on Ag nanowires exhibit good response due to their broad transparency range, the sharp interface between the Ag nanowires and the semiconductor renders them extremely unstable. Surface protection is considered to enhance the stability and lifespan of these devices. Our research has revealed that amorphous Ga2O3 can fully encapsulate the surface of Ag nanowires and securely affix it to the NiO film, resulting in a stable performance with a high responsivity of 48 mA W−1 and detectivity of 6.1 × 1011 Jones for 254 nm light. The unpacked device exhibited a stable photocurrent, showing only 6.8% degradation after 3 months in ambient air. Finally, a large-scale (5 cm × 4 cm, with 12 cm2 of active area) ultraviolet photodetector with a Ga2O3-protected Ag nanowire electrode was prepared, which demonstrated a milliamp-level photocurrent under weak ultraviolet illumination that can be directly read by a conventional multimeter in practical scenarios, indicating the promising prospects of this device for future commercial applications.http://www.sciencedirect.com/science/article/pii/S2772571525000178UV detectorLarge-scaleWindow electrodeSilver nanowiresStability |
| spellingShingle | Xingyuan Yu Yujie Peng Di Zhang Fuqiang Zhai Hua Tang Jiang Cheng Lu Li Xin Yang Feng Cheng Stable, high-performance vertical heterojunction ultraviolet photodetectors with Ga2O3-protected Ag nanowires window electrode ChemPhysMater UV detector Large-scale Window electrode Silver nanowires Stability |
| title | Stable, high-performance vertical heterojunction ultraviolet photodetectors with Ga2O3-protected Ag nanowires window electrode |
| title_full | Stable, high-performance vertical heterojunction ultraviolet photodetectors with Ga2O3-protected Ag nanowires window electrode |
| title_fullStr | Stable, high-performance vertical heterojunction ultraviolet photodetectors with Ga2O3-protected Ag nanowires window electrode |
| title_full_unstemmed | Stable, high-performance vertical heterojunction ultraviolet photodetectors with Ga2O3-protected Ag nanowires window electrode |
| title_short | Stable, high-performance vertical heterojunction ultraviolet photodetectors with Ga2O3-protected Ag nanowires window electrode |
| title_sort | stable high performance vertical heterojunction ultraviolet photodetectors with ga2o3 protected ag nanowires window electrode |
| topic | UV detector Large-scale Window electrode Silver nanowires Stability |
| url | http://www.sciencedirect.com/science/article/pii/S2772571525000178 |
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