Very long wave infrared quantum dot photodetector up to 18 μm
Abstract Colloidal quantum dots (CQDs) are of interest for optoelectronic devices because of the possibility of high-throughput solution processing and the wide energy gap tunability from ultraviolet to infrared wavelengths. People may question about the upper limit on the CQD wavelength region. To...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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Nature Publishing Group
2024-04-01
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| Series: | Light: Science & Applications |
| Online Access: | https://doi.org/10.1038/s41377-024-01436-y |
| _version_ | 1797209096036810752 |
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| author | Xiaomeng Xue Qun Hao Menglu Chen |
| author_facet | Xiaomeng Xue Qun Hao Menglu Chen |
| author_sort | Xiaomeng Xue |
| collection | DOAJ |
| description | Abstract Colloidal quantum dots (CQDs) are of interest for optoelectronic devices because of the possibility of high-throughput solution processing and the wide energy gap tunability from ultraviolet to infrared wavelengths. People may question about the upper limit on the CQD wavelength region. To date, although the CQD absorption already reaches terahertz, the practical photodetection wavelength is limited within mid-wave infrared. To figure out challenges on CQD photoresponse in longer wavelength, would reveal the ultimate property on these nanomaterials. What’s more, it motivates interest in bottom-up infrared photodetection with less than 10% cost compared with epitaxial growth semiconductor bulk. In this work, developing a re-growth method and ionic doping modification, we demonstrate photodetection up to 18 μm wavelength on HgTe CQD. At liquid nitrogen temperature, the responsivity reaches 0.3 A/W and 0.13 A/W, with specific detectivity 6.6 × 108 Jones and 2.3 × 109 Jones for 18 μm and 10 μm CQD photoconductors, respectively. This work is a step toward answering the general question on the CQD photodetection wavelength limitation. |
| first_indexed | 2024-04-24T09:49:16Z |
| format | Article |
| id | doaj.art-d4bd27355a4043e38c3093b7bcc269fb |
| institution | Directory Open Access Journal |
| issn | 2047-7538 |
| language | English |
| last_indexed | 2024-04-24T09:49:16Z |
| publishDate | 2024-04-01 |
| publisher | Nature Publishing Group |
| record_format | Article |
| series | Light: Science & Applications |
| spelling | doaj.art-d4bd27355a4043e38c3093b7bcc269fb2024-04-14T11:29:48ZengNature Publishing GroupLight: Science & Applications2047-75382024-04-0113111110.1038/s41377-024-01436-yVery long wave infrared quantum dot photodetector up to 18 μmXiaomeng Xue0Qun Hao1Menglu Chen2School of Optics and Photonics, Beijing Institute of TechnologySchool of Optics and Photonics, Beijing Institute of TechnologySchool of Optics and Photonics, Beijing Institute of TechnologyAbstract Colloidal quantum dots (CQDs) are of interest for optoelectronic devices because of the possibility of high-throughput solution processing and the wide energy gap tunability from ultraviolet to infrared wavelengths. People may question about the upper limit on the CQD wavelength region. To date, although the CQD absorption already reaches terahertz, the practical photodetection wavelength is limited within mid-wave infrared. To figure out challenges on CQD photoresponse in longer wavelength, would reveal the ultimate property on these nanomaterials. What’s more, it motivates interest in bottom-up infrared photodetection with less than 10% cost compared with epitaxial growth semiconductor bulk. In this work, developing a re-growth method and ionic doping modification, we demonstrate photodetection up to 18 μm wavelength on HgTe CQD. At liquid nitrogen temperature, the responsivity reaches 0.3 A/W and 0.13 A/W, with specific detectivity 6.6 × 108 Jones and 2.3 × 109 Jones for 18 μm and 10 μm CQD photoconductors, respectively. This work is a step toward answering the general question on the CQD photodetection wavelength limitation.https://doi.org/10.1038/s41377-024-01436-y |
| spellingShingle | Xiaomeng Xue Qun Hao Menglu Chen Very long wave infrared quantum dot photodetector up to 18 μm Light: Science & Applications |
| title | Very long wave infrared quantum dot photodetector up to 18 μm |
| title_full | Very long wave infrared quantum dot photodetector up to 18 μm |
| title_fullStr | Very long wave infrared quantum dot photodetector up to 18 μm |
| title_full_unstemmed | Very long wave infrared quantum dot photodetector up to 18 μm |
| title_short | Very long wave infrared quantum dot photodetector up to 18 μm |
| title_sort | very long wave infrared quantum dot photodetector up to 18 μm |
| url | https://doi.org/10.1038/s41377-024-01436-y |
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