Room-temperature oxygen sensitization in highly textured, nanocrystalline PbTe films: A mechanistic study
In this paper, we report large mid-wave infrared photoconductivity in highly textured, nanocrystalline PbTe films thermally evaporated on Si at room temperature. Responsivity as high as 25 V/W is measured at the 3.5 μm wavelength. The large photoconductivity is attributed to the oxygen incorporation...
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American Institute of Physics (AIP)
2013
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| Online Access: | http://hdl.handle.net/1721.1/79729 https://orcid.org/0000-0002-7233-3918 https://orcid.org/0000-0002-0769-0652 https://orcid.org/0000-0002-3913-6189 |
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| author | Wang, Jianfei Hu, Juejun Becla, Piotr Kimerling, Lionel C. Agarwal, Anuradha Murthy |
| author2 | MIT Materials Research Laboratory |
| author_facet | MIT Materials Research Laboratory Wang, Jianfei Hu, Juejun Becla, Piotr Kimerling, Lionel C. Agarwal, Anuradha Murthy |
| author_sort | Wang, Jianfei |
| collection | MIT |
| description | In this paper, we report large mid-wave infrared photoconductivity in highly textured, nanocrystalline PbTe films thermally evaporated on Si at room temperature. Responsivity as high as 25 V/W is measured at the 3.5 μm wavelength. The large photoconductivity is attributed to the oxygen incorporation in the films by diffusion. Carrier concentration as low as 10[superscript 17] cm[superscript −3] is identified to be the consequence of Fermi level pinning induced by the diffused oxygen. The successful demonstration of IR-sensitive PbTe films without the need for high-temperature processing presents an important step toward monolithic integration of mid-wave PbTe infrared detectors on Si read-out integrated circuits (ROICs). |
| first_indexed | 2024-09-23T08:13:23Z |
| format | Article |
| id | mit-1721.1/79729 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T08:13:23Z |
| publishDate | 2013 |
| publisher | American Institute of Physics (AIP) |
| record_format | dspace |
| spelling | mit-1721.1/797292022-09-23T11:42:41Z Room-temperature oxygen sensitization in highly textured, nanocrystalline PbTe films: A mechanistic study Wang, Jianfei Hu, Juejun Becla, Piotr Kimerling, Lionel C. Agarwal, Anuradha Murthy MIT Materials Research Laboratory Massachusetts Institute of Technology. Department of Materials Science and Engineering Massachusetts Institute of Technology. Microphotonics Center Wang, Jianfei Hu, Juejun Becla, Piotr Agarwal, Anuradha Murthy Kimerling, Lionel C. In this paper, we report large mid-wave infrared photoconductivity in highly textured, nanocrystalline PbTe films thermally evaporated on Si at room temperature. Responsivity as high as 25 V/W is measured at the 3.5 μm wavelength. The large photoconductivity is attributed to the oxygen incorporation in the films by diffusion. Carrier concentration as low as 10[superscript 17] cm[superscript −3] is identified to be the consequence of Fermi level pinning induced by the diffused oxygen. The successful demonstration of IR-sensitive PbTe films without the need for high-temperature processing presents an important step toward monolithic integration of mid-wave PbTe infrared detectors on Si read-out integrated circuits (ROICs). 2013-07-30T18:34:43Z 2013-07-30T18:34:43Z 2011-10 2011-05 Article http://purl.org/eprint/type/JournalArticle 00218979 1089-7550 http://hdl.handle.net/1721.1/79729 Wang, Jianfei, Juejun Hu, Piotr Becla, Anuradha M. Agarwal, and Lionel C. Kimerling. “Room-temperature oxygen sensitization in highly textured, nanocrystalline PbTe films: A mechanistic study.” Journal of Applied Physics 110, no. 8 (2011): 083719. © 2011 American Institute of Physics https://orcid.org/0000-0002-7233-3918 https://orcid.org/0000-0002-0769-0652 https://orcid.org/0000-0002-3913-6189 en_US http://dx.doi.org/10.1063/1.3653832 Journal of Applied Physics Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. application/pdf American Institute of Physics (AIP) MIT web domain |
| spellingShingle | Wang, Jianfei Hu, Juejun Becla, Piotr Kimerling, Lionel C. Agarwal, Anuradha Murthy Room-temperature oxygen sensitization in highly textured, nanocrystalline PbTe films: A mechanistic study |
| title | Room-temperature oxygen sensitization in highly textured, nanocrystalline PbTe films: A mechanistic study |
| title_full | Room-temperature oxygen sensitization in highly textured, nanocrystalline PbTe films: A mechanistic study |
| title_fullStr | Room-temperature oxygen sensitization in highly textured, nanocrystalline PbTe films: A mechanistic study |
| title_full_unstemmed | Room-temperature oxygen sensitization in highly textured, nanocrystalline PbTe films: A mechanistic study |
| title_short | Room-temperature oxygen sensitization in highly textured, nanocrystalline PbTe films: A mechanistic study |
| title_sort | room temperature oxygen sensitization in highly textured nanocrystalline pbte films a mechanistic study |
| url | http://hdl.handle.net/1721.1/79729 https://orcid.org/0000-0002-7233-3918 https://orcid.org/0000-0002-0769-0652 https://orcid.org/0000-0002-3913-6189 |
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