Ultra-sensitive graphene–bismuth telluride nano-wire hybrids for infrared detection
The myriad technological applications of infrared radiation sensors make the search for ultra-sensitive detectors extremely crucial. Materials such as bismuth telluride (Bi2Te3), having a small bulk band gap of 0.17 eV, are ideal infrared detectors. However, due to the high recombination rate of pho...
| Main Authors: | , , , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2021
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| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/146945 |
| _version_ | 1811677684603813888 |
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| author | Islam, Saurav Mishra, Jayanta Kumar Kumar, Abinash Chatterjee, Dipanwita Ravishankar, N. Ghosh, Arindam |
| author2 | School of Physical and Mathematical Sciences |
| author_facet | School of Physical and Mathematical Sciences Islam, Saurav Mishra, Jayanta Kumar Kumar, Abinash Chatterjee, Dipanwita Ravishankar, N. Ghosh, Arindam |
| author_sort | Islam, Saurav |
| collection | NTU |
| description | The myriad technological applications of infrared radiation sensors make the search for ultra-sensitive detectors extremely crucial. Materials such as bismuth telluride (Bi2Te3), having a small bulk band gap of 0.17 eV, are ideal infrared detectors. However, due to the high recombination rate of photo-generated charge carriers in the bulk, the electrical response under optical illumination is typically very weak in these materials. We have circumnavigated this by sensitizing graphene with Bi2Te3 nano-wires. These hybrid devices show an ultra-high sensitivity of ∼106 A W−1, under incident electromagnetic radiation from 940 nm to 1720 nm. The theoretical limit of the noise equivalent power and specific detectivity in these devices are ∼10−18 W Hz−1/2 and ∼1011 Jones respectively, which are comparable to those of some of the best known detectors. |
| first_indexed | 2024-10-01T02:41:17Z |
| format | Journal Article |
| id | ntu-10356/146945 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T02:41:17Z |
| publishDate | 2021 |
| record_format | dspace |
| spelling | ntu-10356/1469452021-03-15T05:55:00Z Ultra-sensitive graphene–bismuth telluride nano-wire hybrids for infrared detection Islam, Saurav Mishra, Jayanta Kumar Kumar, Abinash Chatterjee, Dipanwita Ravishankar, N. Ghosh, Arindam School of Physical and Mathematical Sciences Science::Physics Topological Insulator Broad-band The myriad technological applications of infrared radiation sensors make the search for ultra-sensitive detectors extremely crucial. Materials such as bismuth telluride (Bi2Te3), having a small bulk band gap of 0.17 eV, are ideal infrared detectors. However, due to the high recombination rate of photo-generated charge carriers in the bulk, the electrical response under optical illumination is typically very weak in these materials. We have circumnavigated this by sensitizing graphene with Bi2Te3 nano-wires. These hybrid devices show an ultra-high sensitivity of ∼106 A W−1, under incident electromagnetic radiation from 940 nm to 1720 nm. The theoretical limit of the noise equivalent power and specific detectivity in these devices are ∼10−18 W Hz−1/2 and ∼1011 Jones respectively, which are comparable to those of some of the best known detectors. 2021-03-15T05:55:00Z 2021-03-15T05:55:00Z 2019 Journal Article Islam, S., Mishra, J. K., Kumar, A., Chatterjee, D., Ravishankar, N. & Ghosh, A. (2019). Ultra-sensitive graphene–bismuth telluride nano-wire hybrids for infrared detection. Nanoscale, 11(4), 1579-1586. https://dx.doi.org/10.1039/C8NR08433E 2040-3364 https://hdl.handle.net/10356/146945 10.1039/C8NR08433E 4 11 1579 1586 en Nanoscale © 2019 The Royal Society of Chemistry. All rights reserved. |
| spellingShingle | Science::Physics Topological Insulator Broad-band Islam, Saurav Mishra, Jayanta Kumar Kumar, Abinash Chatterjee, Dipanwita Ravishankar, N. Ghosh, Arindam Ultra-sensitive graphene–bismuth telluride nano-wire hybrids for infrared detection |
| title | Ultra-sensitive graphene–bismuth telluride nano-wire hybrids for infrared detection |
| title_full | Ultra-sensitive graphene–bismuth telluride nano-wire hybrids for infrared detection |
| title_fullStr | Ultra-sensitive graphene–bismuth telluride nano-wire hybrids for infrared detection |
| title_full_unstemmed | Ultra-sensitive graphene–bismuth telluride nano-wire hybrids for infrared detection |
| title_short | Ultra-sensitive graphene–bismuth telluride nano-wire hybrids for infrared detection |
| title_sort | ultra sensitive graphene bismuth telluride nano wire hybrids for infrared detection |
| topic | Science::Physics Topological Insulator Broad-band |
| url | https://hdl.handle.net/10356/146945 |
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