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Large-area SnTe nanofilm: preparation and its broadband photodetector with ultra-low dark current
,
Haipeng Wang,
Biao Yue,
Junbin Li,
Hong Wei
Optics Express, Volume: 30, Issue: 9, Start page: 14828
Swansea University Author:
Vincent Teng
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DOI (Published version): 10.1364/oe.454587
Abstract
Photodetectors are receiving increasing attention because of their widely important applications. Therefore, developing broadband high-performance photodetectors using new materials that can function at room temperature has become increasingly important. As a functional material, tin telluride (SnTe...
| Published in: | Optics Express |
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| ISSN: | 1094-4087 |
| Published: |
Optica Publishing Group
2022
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| Online Access: |
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| URI: | https://cronfa.swan.ac.uk/Record/cronfa59748 |
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| Abstract: |
Photodetectors are receiving increasing attention because of their widely important applications. Therefore, developing broadband high-performance photodetectors using new materials that can function at room temperature has become increasingly important. As a functional material, tin telluride (SnTe), has been widely studied as a thermoelectric material. Furthermore, because of its narrow bandgap, it can be used as a novel infrared photodetector material. In this study, a large-area SnTe nanofilm with controllable thickness was deposited onto a quartz substrate using magnetron sputtering and was used to fabricate a photodetector. The device exhibited a photoelectric response over a broad spectral range of 400-1050 nm. In the near-infrared band of 940 nm, the detectivity (D*) and responsivity (R) of the photodetector were 3.46×1011 cmHz1/2w-1 and 1.71 A/W, respectively, at an optical power density of 0.2 mWcm-2. As the thickness of the SnTe nanofilm increased, a transition from semiconducting to metallic properties was experimentally observed for the first time. The large-area (2.5cm × 2.5cm) high-performance nanofilms show important potential for application in infrared focal plane array (FPA) detectors. |
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| College: |
Faculty of Science and Engineering |
| Funders: |
National Key Research and Development Program of China (2019YFB2203404); National Natural Science Foundation of China (11864044). |
| Issue: |
9 |
| Start Page: |
14828 |