Abnormal near-infrared absorption in 2D black phosphorus induced by Ag nanoclusters surface functionalization
Black phosphorus (BP), as a fast emerging 2D material, shows promising potential in near-infrared (NIR) photodetection owing to its relatively small direct thickness-dependent bandgaps. However, the poor NIR absorption due to the atomically thin nature strongly hinders the practical application. In...
| Main Authors: | , , , , , , , , , , , , , , , , |
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| Format: | Journal Article |
| Language: | English |
| Published: |
2020
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| Online Access: | https://hdl.handle.net/10356/138898 |
| _version_ | 1826112235251957760 |
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| author | Hu, Zehua Li, Qiang Lei, Bo Wu, Jing Zhou, Qionghua Gu, Chengding Wen, Xinglin Wang, Junyong Liu, Yanpeng Li, Shisheng Zheng, Yue Lu, Junpeng He, Jun Wang, Li Xiong, Qihua Wang, Jinlan Chen, Wei |
| author2 | School of Physical and Mathematical Sciences |
| author_facet | School of Physical and Mathematical Sciences Hu, Zehua Li, Qiang Lei, Bo Wu, Jing Zhou, Qionghua Gu, Chengding Wen, Xinglin Wang, Junyong Liu, Yanpeng Li, Shisheng Zheng, Yue Lu, Junpeng He, Jun Wang, Li Xiong, Qihua Wang, Jinlan Chen, Wei |
| author_sort | Hu, Zehua |
| collection | NTU |
| description | Black phosphorus (BP), as a fast emerging 2D material, shows promising potential in near-infrared (NIR) photodetection owing to its relatively small direct thickness-dependent bandgaps. However, the poor NIR absorption due to the atomically thin nature strongly hinders the practical application. In this study, it is demonstrated that surface functionalization of Ag nanoclusters on 2D BP can induce an abnormal NIR absorption at ≈746 nm, leading to ≈35 (138) times enhancement in 808 (730) nm NIR photoresponse for BP-based field-effect transistors. First-principles calculations reveal that localized bands are introduced into the bandgap of BP, serving as the midgap states, which create new transitions to the conduction band of BP and eventually lead to the abnormal absorption. This work provides a simple yet effective method to dramatically increase the NIR absorption of BP, which is crucial for developing high-performance NIR optoelectronic devices. |
| first_indexed | 2024-10-01T03:03:39Z |
| format | Journal Article |
| id | ntu-10356/138898 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T03:03:39Z |
| publishDate | 2020 |
| record_format | dspace |
| spelling | ntu-10356/1388982020-05-13T09:27:33Z Abnormal near-infrared absorption in 2D black phosphorus induced by Ag nanoclusters surface functionalization Hu, Zehua Li, Qiang Lei, Bo Wu, Jing Zhou, Qionghua Gu, Chengding Wen, Xinglin Wang, Junyong Liu, Yanpeng Li, Shisheng Zheng, Yue Lu, Junpeng He, Jun Wang, Li Xiong, Qihua Wang, Jinlan Chen, Wei School of Physical and Mathematical Sciences Science::Physics Black Phosphorus Density Functional Theory Black phosphorus (BP), as a fast emerging 2D material, shows promising potential in near-infrared (NIR) photodetection owing to its relatively small direct thickness-dependent bandgaps. However, the poor NIR absorption due to the atomically thin nature strongly hinders the practical application. In this study, it is demonstrated that surface functionalization of Ag nanoclusters on 2D BP can induce an abnormal NIR absorption at ≈746 nm, leading to ≈35 (138) times enhancement in 808 (730) nm NIR photoresponse for BP-based field-effect transistors. First-principles calculations reveal that localized bands are introduced into the bandgap of BP, serving as the midgap states, which create new transitions to the conduction band of BP and eventually lead to the abnormal absorption. This work provides a simple yet effective method to dramatically increase the NIR absorption of BP, which is crucial for developing high-performance NIR optoelectronic devices. MOE (Min. of Education, S’pore) 2020-05-13T09:27:33Z 2020-05-13T09:27:33Z 2018 Journal Article Hu, Z., Li, Q., Lei, B., Wu, J., Zhou, Q., Gu, C., . . . Chen, W. (2018). Abnormal near-infrared absorption in 2D black phosphorus induced by Ag nanoclusters surface functionalization. Advanced Materials, 30(43), 1801931-. doi:10.1002/adma.201801931 0935-9648 https://hdl.handle.net/10356/138898 10.1002/adma.201801931 30144177 2-s2.0-85052471211 43 30 en Advanced Materials © 2018 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. All rights reserved. This paper was published in Advanced Materials and is made available with permission of WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. |
| spellingShingle | Science::Physics Black Phosphorus Density Functional Theory Hu, Zehua Li, Qiang Lei, Bo Wu, Jing Zhou, Qionghua Gu, Chengding Wen, Xinglin Wang, Junyong Liu, Yanpeng Li, Shisheng Zheng, Yue Lu, Junpeng He, Jun Wang, Li Xiong, Qihua Wang, Jinlan Chen, Wei Abnormal near-infrared absorption in 2D black phosphorus induced by Ag nanoclusters surface functionalization |
| title | Abnormal near-infrared absorption in 2D black phosphorus induced by Ag nanoclusters surface functionalization |
| title_full | Abnormal near-infrared absorption in 2D black phosphorus induced by Ag nanoclusters surface functionalization |
| title_fullStr | Abnormal near-infrared absorption in 2D black phosphorus induced by Ag nanoclusters surface functionalization |
| title_full_unstemmed | Abnormal near-infrared absorption in 2D black phosphorus induced by Ag nanoclusters surface functionalization |
| title_short | Abnormal near-infrared absorption in 2D black phosphorus induced by Ag nanoclusters surface functionalization |
| title_sort | abnormal near infrared absorption in 2d black phosphorus induced by ag nanoclusters surface functionalization |
| topic | Science::Physics Black Phosphorus Density Functional Theory |
| url | https://hdl.handle.net/10356/138898 |
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