Journal
SCIENCE CHINA-INFORMATION SCIENCES
Volume 64, Issue 4, Pages -Publisher
SCIENCE PRESS
DOI: 10.1007/s11432-020-3172-1
Keywords
black arsenic phosphorus; crystal structure; optical property; electrical property; photodetector
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B-AsP is an alloy of black phosphorus and arsenic, with unique advantages in optical and electronic properties.
By forming van der Waals heterojunctions with other 2D materials, novel functional optoelectronic devices can be realized.
Future research directions include further optimizing the performance of b-AsP and exploring more application areas.
Two-dimensional (2D) black arsenic phosphorus (b-AsP), as an alloy of black phosphorus (b-P) with arsenic, has attracted great attention because of its outstanding electronic and optical properties, including high carrier mobility, tunable bandgap and in-plane anisotropy. B-AsP has a smaller bandgap (0.15-0.3 eV) than the b-P bandgap (0.3-2.0 eV), and thus can be used for mid-infrared photodetectors. In addition, both of them can form various van der Waals (vdW) heterojunctions with other 2D materials to realize novel functional optoelectronic devices. Here, we compare the basic characteristics of b-AsP and b-P, including crystal structure, optical properties, band structure, electrical properties and stability, and we summarize the update progress of b-AsP in photo detection, including representatives of phototransistor and photodiode devices. In the last part, the future research directions are discussed.
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