Projects per year
Abstract
van der Waals (vdW) heterojunctions enable arbitrary combinations of different layered semiconductors with unique band structures, offering distinctive band engineering for photonic and optoelectronic devices with new functionalities and superior performance. Here, an interlayer photoresponse of a few-layer MoSe2/WSe2 vdW heterojunction is reported. With proper electrical gating and bias, the heterojunction exhibits high-sensitivity photodetection with the operation wavelength extended up to the telecommunication band (i.e. 1550 nm). The photoresponsivity and normalized photocurrent-to-dark current ratio reach up to 127 mA W−1 and 1.9 × 104 mW−1, respectively. The results not only provide a promising solution to realize high-performance vdW telecommunication band photodetectors, but also pave the way for using sub-bandgap engineering of two-dimensional layered materials for photonic and optoelectronic applications.
Original language | English |
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Article number | 1804388 |
Journal | Advanced Functional Materials |
Volume | 28 |
Issue number | 47 |
Early online date | 1 Jan 2018 |
DOIs | |
Publication status | Published - 21 Nov 2018 |
MoE publication type | A1 Journal article-refereed |
Keywords
- MoSe
- photodetectors
- sub-bandgap photodetection
- van der Waals heterojunction
- WSe
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Dive into the research topics of 'A MoSe2/WSe2 Heterojunction-Based Photodetector at Telecommunication Wavelengths'. Together they form a unique fingerprint.Projects
- 6 Finished
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LAYERED 2D MATERIALS BASED THZ SPECTROSCOPY AND IMAGING
Sun, Z. (Principal investigator), Generalov, A. (Project Member), Hulkko, E. (Project Member), Mohsen, A. (Project Member), Uddin, M. (Project Member) & Das, S. (Project Member)
01/01/2018 → 31/12/2021
Project: Academy of Finland: Other research funding
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Finnish Centre of Excellence in Quantum Technology
Sun, Z. (Principal investigator), Cui, X. (Project Member), Bai, X. (Project Member), Du, L. (Project Member), Wang, Y. (Project Member) & Turunen, M. (Project Member)
01/01/2018 → 31/12/2020
Project: Academy of Finland: Other research funding
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Graphene Based Ultrafast Lasers
Sun, Z. (Principal investigator), Yang, H. (Project Member), Das, S. (Project Member), Xue, H. (Project Member), Autere, A. (Project Member), Generalov, A. (Project Member) & Du, M. (Project Member)
01/09/2017 → 31/08/2019
Project: Academy of Finland: Other research funding