Multicolor and Polarization-Sensitive Photodetection of α-In₂Se₃/2H-MoTe₂ vdW Heterostructure for Imaging and Optical Communication

ACS Applied Materials & Interfaces, Год журнала: 2025, Номер unknown

Опубликована: Май 17, 2025

Polarization-sensitive photodetection across multiple wavelengths holds great potential for advanced optoelectronic applications. Traditional polarization photodetectors require complex polarizers and lens system, while emerging van der Waals (vdW) heterojunction still face performance limitations. Here, we present a vdW-stacked α-In2Se3/2H-MoTe2 heterostructure, enabling multicolor polarization-sensitive the visible near-infrared (NIR) spectral ranges. A peak responsivity of 3.7 A·W-1, specific detectivity 5.1 × 109 Jones, external quantum efficiency 486%, response time ∼6 ms are demonstrated at NIR wavelength 940 nm, facilitated by efficient photocarriers separation within built-in electric field in heterostructure region, as confirmed high-spatial-resolution photocurrent mappings. The sensitivity with ratios 1.40 638 nm 1.07 1550 is also verified, imaging high resolution. Furthermore, photodetector can act an optical signal receiver, high-fidelity encoded communication. Leveraging intrinsic material properties field-tunability vdW heterostructures provides promising pathway next-generation high-performance multifunctional photodetectors.

Язык: Английский

Ultraviolet laser-induced depolymerization of polyvinylpyrrolidone for decreasing off-current of 2D tellurium transistors

Applied Surface Science, Год журнала: 2025, Номер unknown, С. 163659 - 163659

Опубликована: Июнь 1, 2025

Язык: Английский