Spectrum-shaped Si-perovskite hybrid photodetectors for hyperspectral bioimaging
Hyperspectral imaging (HSI) with rich spectral and spatial information holds potential for applications ranging from remote sensing to biomedicine. However, charge-coupled device (CCD) detectors used in conventional HSI systems suffer from inferior and unbalanced responsivity in the visible region,...
| Main Authors: | , , , , |
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| Format: | Journal Article |
| Language: | English |
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2022
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| Online Access: | https://hdl.handle.net/10356/154788 |
| _version_ | 1826121106358009856 |
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| author | Liu, Yujin Ji, Zhong Li, Yaping Fan, Hong Jin Mai, Wenjie |
| author2 | School of Physical and Mathematical Sciences |
| author_facet | School of Physical and Mathematical Sciences Liu, Yujin Ji, Zhong Li, Yaping Fan, Hong Jin Mai, Wenjie |
| author_sort | Liu, Yujin |
| collection | NTU |
| description | Hyperspectral imaging (HSI) with rich spectral and spatial information holds potential for applications ranging from remote sensing to biomedicine. However, charge-coupled device (CCD) detectors used in conventional HSI systems suffer from inferior and unbalanced responsivity in the visible region, which is not a perfect choice for high-performance visible HSI. That is, conventional Si-based CCDs exhibit poor responsivity at short wavelengths (e.g., 400-600 nm) compared with that at longer wavelengths due to the nature of the indirect bandgap in silicon of around 1.1 eV. To solve this challenge, we introduce a CsPbBr3 perovskite layer to shape the spectrum of a Si/PEDOT:PSS heterojunction photodetector (PD), resulting in a fabricated Si-CsPbBr3 hybrid PD with enhanced responsivity at 400-600 nm. This results in an approximately flat spectral responsivity curve in the visible region (400-800 nm). Therefore, the stable Si - CsPbBr3 hybrid PD with a flat spectrum overcomes the shortcomings of traditional Si-based PDs and makes it more suitable for HSI. Further, we set up a first perovskite HSI system with high spectrum resolution and demonstrate potential applications for tumor detection and tissue identification. We believe that this perovskite optimization can be integrated into modern CCD, thus becoming a step in future CCD fabrication processes, which is a milestone for high-performance HSI systems. |
| first_indexed | 2024-10-01T05:27:18Z |
| format | Journal Article |
| id | ntu-10356/154788 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T05:27:18Z |
| publishDate | 2022 |
| record_format | dspace |
| spelling | ntu-10356/1547882023-02-28T19:44:53Z Spectrum-shaped Si-perovskite hybrid photodetectors for hyperspectral bioimaging Liu, Yujin Ji, Zhong Li, Yaping Fan, Hong Jin Mai, Wenjie School of Physical and Mathematical Sciences Science::Physics::Optics and light Charge Coupled Devices Heterojunctions Hyperspectral imaging (HSI) with rich spectral and spatial information holds potential for applications ranging from remote sensing to biomedicine. However, charge-coupled device (CCD) detectors used in conventional HSI systems suffer from inferior and unbalanced responsivity in the visible region, which is not a perfect choice for high-performance visible HSI. That is, conventional Si-based CCDs exhibit poor responsivity at short wavelengths (e.g., 400-600 nm) compared with that at longer wavelengths due to the nature of the indirect bandgap in silicon of around 1.1 eV. To solve this challenge, we introduce a CsPbBr3 perovskite layer to shape the spectrum of a Si/PEDOT:PSS heterojunction photodetector (PD), resulting in a fabricated Si-CsPbBr3 hybrid PD with enhanced responsivity at 400-600 nm. This results in an approximately flat spectral responsivity curve in the visible region (400-800 nm). Therefore, the stable Si - CsPbBr3 hybrid PD with a flat spectrum overcomes the shortcomings of traditional Si-based PDs and makes it more suitable for HSI. Further, we set up a first perovskite HSI system with high spectrum resolution and demonstrate potential applications for tumor detection and tissue identification. We believe that this perovskite optimization can be integrated into modern CCD, thus becoming a step in future CCD fabrication processes, which is a milestone for high-performance HSI systems. Agency for Science, Technology and Research (A*STAR) Published version H. F. thanks the financial support from Agency for Science, Technology, and Research (A*STAR), Singapore by AME Individual Research. 2022-02-07T08:57:46Z 2022-02-07T08:57:46Z 2021 Journal Article Liu, Y., Ji, Z., Li, Y., Fan, H. J. & Mai, W. (2021). Spectrum-shaped Si-perovskite hybrid photodetectors for hyperspectral bioimaging. Photonics Research, 9(9), 1734-1744. https://dx.doi.org/10.1364/PRJ.411415 2327-9125 https://hdl.handle.net/10356/154788 10.1364/PRJ.411415 2-s2.0-85114799020 9 9 1734 1744 en Photonics Research © 2021 Chinese Laser Press. Published by Optica Publishing Group. This is an open-access article distributed under the terms of the Creative Commons Attribution License. application/pdf |
| spellingShingle | Science::Physics::Optics and light Charge Coupled Devices Heterojunctions Liu, Yujin Ji, Zhong Li, Yaping Fan, Hong Jin Mai, Wenjie Spectrum-shaped Si-perovskite hybrid photodetectors for hyperspectral bioimaging |
| title | Spectrum-shaped Si-perovskite hybrid photodetectors for hyperspectral bioimaging |
| title_full | Spectrum-shaped Si-perovskite hybrid photodetectors for hyperspectral bioimaging |
| title_fullStr | Spectrum-shaped Si-perovskite hybrid photodetectors for hyperspectral bioimaging |
| title_full_unstemmed | Spectrum-shaped Si-perovskite hybrid photodetectors for hyperspectral bioimaging |
| title_short | Spectrum-shaped Si-perovskite hybrid photodetectors for hyperspectral bioimaging |
| title_sort | spectrum shaped si perovskite hybrid photodetectors for hyperspectral bioimaging |
| topic | Science::Physics::Optics and light Charge Coupled Devices Heterojunctions |
| url | https://hdl.handle.net/10356/154788 |
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