期刊
ADVANCED ELECTRONIC MATERIALS
卷 6, 期 1, 页码 -出版社
WILEY
DOI: 10.1002/aelm.201900794
关键词
crystal growth; flexible optoelectronics; photoresponsivity; specific detectivity; transition metal dichalcogenides
资金
- Ministry of Science and Technology of Taiwan [MOST-(106-2119-M-002-035-MY3), MOST-(108-2112-M-001-049-MY2)]
- Academia Sinica [AS-SS-106-01-1, NM004]
- LEAP Berkeley Program
- Marie Sklodowska-Curie Individual Fellowship (MOFUS) [795356]
- [AIMA-108L9008]
- Marie Curie Actions (MSCA) [795356] Funding Source: Marie Curie Actions (MSCA)
2D transition-metal dichalcogenides have attracted significant interest in recent years due to their multiple degrees of freedom, allowing for tuning their physical properties via band engineering and dimensionality adjustment. The study of ternary 2D hafnium selenosulfide HfSSe (HSS) high-quality single crystals grown with the chemical vapor transport (CVT) technique is reported. An as-grown HSS single crystal exhibits excellent phototransistor performance from the visible to the near-infrared with outstanding stability. A giant photoresponsivity (approximate to 6.4 x 10(4) A W-1 at 488 nm) and high specific detectivity (approximate to 10(14) Jones) are exhibited by a device fabricated by exfoliating single-crystal HSS of nano-thickness on a rigid Si/SiO2 substrate. The application of HSS single crystal is extended to yield a sensible flexible photodetector of photoresponsivity up to approximate to 1.3 A W-1 at 980 nm. The photoresponsivity of CVT-grown HSS single crystal is significantly larger than those fabricated with other existing Hf-based chalcogenides. The results suggest that the layered multi-elemental 2D chalcogenide single crystals hold great promise for future wearable electronics and integrated optoelectronic circuits.
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