Ultra-strong anisotropic photo-responsivity of bilayer tellurene: a quantum transport and time-domain first principle study
Unlike traditional two-dimensional layered materials, tellurium (Te) shows its one-dimensional van der Waals structure and triggers intensive researches. Through a density functional theory coupled with the nonequilibrium Green’s function calculation, we found that bilayer tellurene has a broad phot...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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De Gruyter
2019-12-01
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| Series: | Nanophotonics |
| Subjects: | |
| Online Access: | https://doi.org/10.1515/nanoph-2019-0435 |
| _version_ | 1819121980653174784 |
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| author | Gao Siyan Sun Changqing Zhang Xi |
| author_facet | Gao Siyan Sun Changqing Zhang Xi |
| author_sort | Gao Siyan |
| collection | DOAJ |
| description | Unlike traditional two-dimensional layered materials, tellurium (Te) shows its one-dimensional van der Waals structure and triggers intensive researches. Through a density functional theory coupled with the nonequilibrium Green’s function calculation, we found that bilayer tellurene has a broad photoelectric response over the range from the visible to the near-infrared region. Besides, bilayer tellurene photodetector presents an ultra-strong anisotropic photo-responsivity and an ultra-high extinction ratio (~2812 at the photon energy of 3.4 eV) because of its non-layer/chain structure, which is superior to the antimonene (~145) and phosphorene/blue phosphorene bilayers (~240). Time-domain first principle study further reveals that the ultra-strong anisotropy comes from the transition of Te 5p bonding orbitals along or perpendicular to the chain directions. With these excellent optoelectronic merits, bilayer tellurene may become a promising candidate for next-generation photoelectronic devices. |
| first_indexed | 2024-12-22T06:45:11Z |
| format | Article |
| id | doaj.art-99ce686af4514e7fa77d65b1ad4ee248 |
| institution | Directory Open Access Journal |
| issn | 2192-8606 2192-8614 |
| language | English |
| last_indexed | 2024-12-22T06:45:11Z |
| publishDate | 2019-12-01 |
| publisher | De Gruyter |
| record_format | Article |
| series | Nanophotonics |
| spelling | doaj.art-99ce686af4514e7fa77d65b1ad4ee2482022-12-21T18:35:17ZengDe GruyterNanophotonics2192-86062192-86142019-12-01971931194010.1515/nanoph-2019-0435nanoph-2019-0435Ultra-strong anisotropic photo-responsivity of bilayer tellurene: a quantum transport and time-domain first principle studyGao Siyan0Sun Changqing1Zhang Xi2Institute of Nanosurface Science and Engineering, Guangdong Provincial Key Laboratory of Micro/Nano, Shenzhen University, Shenzhen 518060, ChinaSchool of Electrical and Electronic Engineering, Nanyang Technological University, Singapore 639798, SingaporeInstitute of Nanosurface Science and Engineering, Guangdong Provincial Key Laboratory of Micro/Nano, Shenzhen University, Shenzhen 518060, ChinaUnlike traditional two-dimensional layered materials, tellurium (Te) shows its one-dimensional van der Waals structure and triggers intensive researches. Through a density functional theory coupled with the nonequilibrium Green’s function calculation, we found that bilayer tellurene has a broad photoelectric response over the range from the visible to the near-infrared region. Besides, bilayer tellurene photodetector presents an ultra-strong anisotropic photo-responsivity and an ultra-high extinction ratio (~2812 at the photon energy of 3.4 eV) because of its non-layer/chain structure, which is superior to the antimonene (~145) and phosphorene/blue phosphorene bilayers (~240). Time-domain first principle study further reveals that the ultra-strong anisotropy comes from the transition of Te 5p bonding orbitals along or perpendicular to the chain directions. With these excellent optoelectronic merits, bilayer tellurene may become a promising candidate for next-generation photoelectronic devices.https://doi.org/10.1515/nanoph-2019-0435bilayer tellurene photodetectorquantum transporttd-dftultra-high extinction ratioultra-strong anisotropynon-layer structure |
| spellingShingle | Gao Siyan Sun Changqing Zhang Xi Ultra-strong anisotropic photo-responsivity of bilayer tellurene: a quantum transport and time-domain first principle study Nanophotonics bilayer tellurene photodetector quantum transport td-dft ultra-high extinction ratio ultra-strong anisotropy non-layer structure |
| title | Ultra-strong anisotropic photo-responsivity of bilayer tellurene: a quantum transport and time-domain first principle study |
| title_full | Ultra-strong anisotropic photo-responsivity of bilayer tellurene: a quantum transport and time-domain first principle study |
| title_fullStr | Ultra-strong anisotropic photo-responsivity of bilayer tellurene: a quantum transport and time-domain first principle study |
| title_full_unstemmed | Ultra-strong anisotropic photo-responsivity of bilayer tellurene: a quantum transport and time-domain first principle study |
| title_short | Ultra-strong anisotropic photo-responsivity of bilayer tellurene: a quantum transport and time-domain first principle study |
| title_sort | ultra strong anisotropic photo responsivity of bilayer tellurene a quantum transport and time domain first principle study |
| topic | bilayer tellurene photodetector quantum transport td-dft ultra-high extinction ratio ultra-strong anisotropy non-layer structure |
| url | https://doi.org/10.1515/nanoph-2019-0435 |
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