Self-powered tunable photodetection via flexoelectric engineering of single-phase 2HMoS2
Two-dimensional (2D) molybdenum disulfide (MoS2) has shown considerable potential for photodetection, yet existing MoS2-based photodetectors require either external voltage bias or complex heterojunctions. In this work, we present a new device concept based on flexoelectric engineering of bulk photo...
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Elsevier
2025-11-01
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| Series: | Journal of Materiomics |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2352847825000930 |
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| author | Junxi Yu Yuan Zhang Songjie Yang Chunlin Song Shiyao Xu Boyuan Huang Qingyuan Wang Jiangyu Li |
| author_facet | Junxi Yu Yuan Zhang Songjie Yang Chunlin Song Shiyao Xu Boyuan Huang Qingyuan Wang Jiangyu Li |
| author_sort | Junxi Yu |
| collection | DOAJ |
| description | Two-dimensional (2D) molybdenum disulfide (MoS2) has shown considerable potential for photodetection, yet existing MoS2-based photodetectors require either external voltage bias or complex heterojunctions. In this work, we present a new device concept based on flexoelectric engineering of bulk photovoltaic effect (BPVE) of 2HMoS2, simplifying the device configuration considerably while enhancing its self-powered photodetection performance. By introducing a strain gradient in the suspended 2HMoS2, we break its inversion symmetry, resulting in BPVE in the otherwise centrosymmetric system. The significant flexoelectric polarization induced also facilitates efficient photocarrier separation, leading to a 41-fold enhancement in short-circuit photocurrent under a strain gradient of 0.95μm−1. Furthermore, the flexoelectric-engineered photodetector can be dynamically tuned via air pressure, enabling multilevel photoconductance and achieving a responsivity of 191 mA/W. This performance surpasses existing self-powered MoS2-based photodetectors reported in literature, offering a strategy for enhanced photodetection. |
| format | Article |
| id | doaj-art-b5a92c46ce524cd3a9b55bd36eb0edf5 |
| institution | Kabale University |
| issn | 2352-8478 |
| language | English |
| publishDate | 2025-11-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materiomics |
| spelling | doaj-art-b5a92c46ce524cd3a9b55bd36eb0edf52025-08-20T03:28:44ZengElsevierJournal of Materiomics2352-84782025-11-0111610110310.1016/j.jmat.2025.101103Self-powered tunable photodetection via flexoelectric engineering of single-phase 2HMoS2Junxi Yu0Yuan Zhang1Songjie Yang2Chunlin Song3Shiyao Xu4Boyuan Huang5Qingyuan Wang6Jiangyu Li7Institute for Advanced Study, Chengdu University, Chengdu, 610100, China; Department of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen, 518055, Guangdong, China; Guangdong Provincial Key Laboratory of Functional Oxide Materials and Devices, Southern University of Science and Technology, Shenzhen, 518055, Guangdong, China; Corresponding author. Institute for Advanced Study, Chengdu University, Chengdu, 610100, China.Department of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen, 518055, Guangdong, China; Guangdong Provincial Key Laboratory of Functional Oxide Materials and Devices, Southern University of Science and Technology, Shenzhen, 518055, Guangdong, ChinaInstitute for Advanced Study, Chengdu University, Chengdu, 610100, China; Department of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen, 518055, Guangdong, ChinaDepartment of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen, 518055, Guangdong, China; Guangdong Provincial Key Laboratory of Functional Oxide Materials and Devices, Southern University of Science and Technology, Shenzhen, 518055, Guangdong, ChinaDepartment of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen, 518055, Guangdong, ChinaDepartment of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen, 518055, Guangdong, China; Guangdong Provincial Key Laboratory of Functional Oxide Materials and Devices, Southern University of Science and Technology, Shenzhen, 518055, Guangdong, ChinaInstitute for Advanced Study, Chengdu University, Chengdu, 610100, China; Failure Mechanics and Engineering Disaster Prevention and Mitigation Key Laboratory of Sichuan Province, Sichuan University, Chengdu, 610065, China; Corresponding author. Institute for Advanced Study, Chengdu University, Chengdu, 610100, China.Department of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen, 518055, Guangdong, China; Guangdong Provincial Key Laboratory of Functional Oxide Materials and Devices, Southern University of Science and Technology, Shenzhen, 518055, Guangdong, China; Corresponding author. Department of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen, 518055, Guangdong, China.Two-dimensional (2D) molybdenum disulfide (MoS2) has shown considerable potential for photodetection, yet existing MoS2-based photodetectors require either external voltage bias or complex heterojunctions. In this work, we present a new device concept based on flexoelectric engineering of bulk photovoltaic effect (BPVE) of 2HMoS2, simplifying the device configuration considerably while enhancing its self-powered photodetection performance. By introducing a strain gradient in the suspended 2HMoS2, we break its inversion symmetry, resulting in BPVE in the otherwise centrosymmetric system. The significant flexoelectric polarization induced also facilitates efficient photocarrier separation, leading to a 41-fold enhancement in short-circuit photocurrent under a strain gradient of 0.95μm−1. Furthermore, the flexoelectric-engineered photodetector can be dynamically tuned via air pressure, enabling multilevel photoconductance and achieving a responsivity of 191 mA/W. This performance surpasses existing self-powered MoS2-based photodetectors reported in literature, offering a strategy for enhanced photodetection.http://www.sciencedirect.com/science/article/pii/S2352847825000930Flexoelectric effectBulk photovoltaic effectTwo-dimensional MoS2Self-powered photodetector |
| spellingShingle | Junxi Yu Yuan Zhang Songjie Yang Chunlin Song Shiyao Xu Boyuan Huang Qingyuan Wang Jiangyu Li Self-powered tunable photodetection via flexoelectric engineering of single-phase 2HMoS2 Journal of Materiomics Flexoelectric effect Bulk photovoltaic effect Two-dimensional MoS2 Self-powered photodetector |
| title | Self-powered tunable photodetection via flexoelectric engineering of single-phase 2HMoS2 |
| title_full | Self-powered tunable photodetection via flexoelectric engineering of single-phase 2HMoS2 |
| title_fullStr | Self-powered tunable photodetection via flexoelectric engineering of single-phase 2HMoS2 |
| title_full_unstemmed | Self-powered tunable photodetection via flexoelectric engineering of single-phase 2HMoS2 |
| title_short | Self-powered tunable photodetection via flexoelectric engineering of single-phase 2HMoS2 |
| title_sort | self powered tunable photodetection via flexoelectric engineering of single phase 2hmos2 |
| topic | Flexoelectric effect Bulk photovoltaic effect Two-dimensional MoS2 Self-powered photodetector |
| url | http://www.sciencedirect.com/science/article/pii/S2352847825000930 |
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