Ultra-sensitive polarization-resolved black phosphorus homojunction photodetector defined by ferroelectric domains.

ABSTRACT: With the further miniaturization and integration of multi-dimensional optical information detection devices, polarization-sensitive photodetectors based on anisotropic low-dimension materials have attractive potential applications. However, the performance of these devices is restricted by intrinsic property of materials leading to a small polarization ratio of the detectors. Here, we construct a black phosphorus (BP) homojunction photodetector defined by ferroelectric domains with ultra-sensitive polarization photoresponse. With the modulation of ferroelectric field, the BP exhibits anisotropic dispersion changes, leading an increased photothermalelectric (PTE) current in the armchair (AC) direction. Moreover, the PN junction can promote the PTE current and accelerate carrier separation.

SUBMITTER: Wu S 

PROVIDER: S-EPMC9184637 | biostudies-literature | 2022 Jun

REPOSITORIES: biostudies-literature