Ultrasensitive and Ultrafast Self-Powered Ultraviolet Photodetector Array for Solar-Blind and Weak-Light Imaging
© 2025 Wiley‐VCH GmbH.
| Publié dans: | Advanced materials (Deerfield Beach, Fla.). - 1998. - (2025) vom: 17. Okt., Seite e14968 |
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| Auteur principal: | |
| Autres auteurs: | , , , , , , , , , , , , , , |
| Format: | Article en ligne |
| Langue: | English |
| Publié: |
2025
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| Accès à la collection: | Advanced materials (Deerfield Beach, Fla.) |
| Sujets: | Journal Article CuNiO2/SiC heterojunctions arrays self‐powered solar‐blind weak‐light |
| Résumé: | © 2025 Wiley‐VCH GmbH. Self-powered ultraviolet (UV) photodetectors (PDs) based on wide bandgap semiconductors (WBGSs) and their heterostructures face challenges in ultrasensitive and ultrafast weak-light detection capabilities. In this work, an 8 × 8 UV photodetector array based on CuNiO2/SiC p-n heterojunctions is demonstrated to operate in both solar-blind and weak-light conditions. The device achieves a weak-light detection limit of 4.6 nW·mm-2, a fast response time of 45 ns, and a high responsivity of 104.2 mA·W-1 and a detectivity of 3.4 × 1012 Jones, outperforming self-powered UV PDs based on SiC and Ga2O3-based WBGSs and their heterostructures. This excellent performance of the device originates from the high interface quality, large built-in electric field, Fowler-Nordheim tunneling (FNT) of charge transport, and enhancing light absorption at the heterostructures. Moreover, the detector exhibits a low noise power density below 10-22 A2·Hz-1 and a high cutoff frequency of 5 kHz, enabling it to maintain high-contrast real-time reflection imaging capability under solar illumination |
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| Description: | Date Revised 17.10.2025 published: Print-Electronic Citation Status Publisher |
| ISSN: | 1521-4095 |
| DOI: | 10.1002/adma.202514968 |