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• W4361291639 abstract "In recent years, two-dimensional (2D) nonlayered Bi2O2Se-based electronics and optoelectronics have drawn enormous attention owing to their high electron mobility, facile synthetic process, stability to the atmosphere, and moderate narrow band gaps. However, 2D Bi2O2Se-based photodetectors typically present large dark current, relatively slow response speed, and persistent photoconductivity effect, limiting further improvement in fast-response imaging sensors and low-consumption broadband detection. Herein, a Bi2O2Se/2H-MoTe2 van der Waals (vdWs) heterostructure obtained from the chemical vapor deposition (CVD) approach and vertical stacking is reported. The proposed type-II staggered band alignment desirable for suppression of dark current and separation of photoinduced carriers is confirmed by density functional theory (DFT) calculations, accompanied by strong interlayer coupling and efficient built-in potential at the junction. Consequently, a stable visible (405 nm) to near-infrared (1310 nm) response capability, a self-driven prominent responsivity (R) of 1.24 A·W-1, and a high specific detectivity (D*) of 3.73 × 1011 Jones under 405 nm are achieved. In particular, R, D*, fill factor, and photoelectrical conversion efficiency (PCE) can be enhanced to 4.96 A·W-1, 3.84 × 1012 Jones, 0.52, and 7.21% at Vg = -60 V through a large band offset originated from the n+-p junction. It is suggested that the present vdWs heterostructure is a promising candidate for logical integrated circuits, image sensors, and low-power consumption detection." @default.
• W4361291639 created "2023-03-31" @default.
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• W4361291639 date "2023-03-29" @default.
• W4361291639 modified "2023-10-16" @default.
• W4361291639 title "Type-II Bi₂O₂Se/MoTe₂ van der Waals Heterostructure Photodetectors with High Gate-Modulation Photovoltaic Performance" @default.
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• W4361291639 doi "https://doi.org/10.1021/acsami.3c01807" @default.
• W4361291639 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/36989425" @default.
• W4361291639 hasPublicationYear "2023" @default.
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