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Synthesis of Large‐Area Atomically Thin BiOI Crystals with Highly Sensitive and Controllable Photodetection
Author(s) -
Zeng Wei,
Li Jie,
Feng Liping,
Pan Haixi,
Zhang Xiaodong,
Sun Hanqing,
Liu Zhengtang
Publication year - 2019
Publication title -
advanced functional materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 6.069
H-Index - 322
eISSN - 1616-3028
pISSN - 1616-301X
DOI - 10.1002/adfm.201900129
Subject(s) - materials science , photodetection , photodetector , ternary operation , optoelectronics , chemical vapor deposition , ultraviolet , dark current , irradiation , thin film , nanotechnology , physics , computer science , nuclear physics , programming language
Compared to the most studied 2D elements and binary compounds, ternary layered compounds with more adjustable physical and chemical properties have exhibited potential applications in electronic and optoelectronic devices. Here, 2D ternary layered BiOI crystals are synthesized first with a domain size up to 100 µm via space‐confined chemical vapor deposition. The photodetectors based on the as‐grown BiOI nanosheets demonstrate high sensitivity to 473 nm light. The I on / I off ratio and detectivity of BiOI photodetectors can reach up to 1 × 10 5 and 8.2 × 10 11 Jones at 473 nm, respectively. Particularly, the contact and dark current of the photodetectors can be controlled by 254 nm ultraviolet light irradiation due to the introduction of oxygen vacancies. The facile synthesis of large‐area atomically thin BiOI and its controllable performance by ultraviolet light irradiation suggest that 2D BiOI crystal is a promising material for fundamental investigations and optoelectronic applications.