Fast and Highly Sensitive Ionic-Polymer-Gated WS2 -Graphene Photodetectors
Yazarlar (7)
Jake D. Mehew
University Of Exeter, İngiltere
University Of Exeter, İngiltere
Dr. Öğr. Üyesi Selim ÜNAL University Of Exeter, İngiltere
Elias Torres Alonso
University Of Exeter, İngiltere
University Of Exeter, İngiltere
Gareth F. Jones University Of Exeter, İngiltere
Saad Fadhil Ramadhan
University Of Exeter, İngiltere
University Of Exeter, İngiltere
Monica F. Craciun
University Of Exeter, İngiltere
University Of Exeter, İngiltere
Saverio Russo
University Of Exeter, İngiltere
University Of Exeter, İngiltere
| Makale Türü |
Özgün Makale
(SSCI, AHCI, SCI, SCI-Exp dergilerinde yayınlanan tam makale)
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| Dergi Adı | Advanced Materials | ||
| Dergi ISSN | 0935-9648 Wos Dergi Scopus Dergi | ||
| Dergi Tarandığı Indeksler | SCI | ||
| Makale Dili | İngilizce | Basım Tarihi | 04-2017 |
| Kabul Tarihi | – | Yayınlanma Tarihi | 18-04-2017 |
| Cilt / Sayı / Sayfa | 29 / 23 / 1700222–0 | DOI | 10.1002/adma.201700222 |
| Makale Linki | http://dx.doi.org/10.1002/adma.201700222 | ||
| Özet |
| The combination of graphene with semiconductor materials in heterostructure photodetectors enables amplified detection of femtowatt light signals using micrometer‐scale electronic devices. Presently, long‐lived charge traps limit the speed of such detectors, and impractical strategies, e.g., the use of large gate‐voltage pulses, have been employed to achieve bandwidths suitable for applications such as video‐frame‐rate imaging. Here, atomically thin graphene–WS2 heterostructure photodetectors encapsulated in an ionic polymer are reported, which are uniquely able to operate at bandwidths up to 1.5 kHz whilst maintaining internal gain as large as 106. Highly mobile ions and the nanometer‐scale Debye length of the ionic polymer are used to screen charge traps and tune the Fermi level of the graphene over an unprecedented range at the interface with WS2. Responsivity R = 106 A W−1 and detectivity D* = 3 … |
| Anahtar Kelimeler |
| graphene | ionic-polymer gating | photodetectors | van der Waals heterostructures | WS2 |
BM Sürdürülebilir Kalkınma Amaçları
| Atıf Sayıları | |
| Web of Science | 124 |
| Scopus | 124 |
| Google Scholar | 150 |