Ultrafast reversible photoconductivity in 2D MoTe₂/Pt van der Waals heterostructure.

ABSTRACT: Two-dimensional (2D) materials, particularly transition metal dichalcogenides, have exceptional optoelectronic properties, making them highly promising for next-generation photonic integrated circuits. Despite great advancements in 2D optoelectronic devices, achieving ultrafast and controllable photoconductivity polarity inversion with a single device remains a fundamental challenge due to the static nature of built-in electric fields at metal/2D material interfaces. This study demonstrates a transient electric field reversal at the MoTe₂/Pt Schottky junction, enabling photoconductivity inversion from negative to positive within 100 ps. By applying ultrafast photocurrent detection, a minimal voltage variation (10 mV) precisely controls this transition, and a device with a remark

SUBMITTER: Tao Y 

PROVIDER: S-EPMC12429035 | biostudies-literature | 2025 Sep

REPOSITORIES: biostudies-literature