High performance near-infrared photodetector based on single-walled carbon nanotubes and graphene

Abstract

In recent years, photodetectors have been extensively studied. In this paper, single-walled carbon nanotubes (SWCNTs) were combined with GaAs materials to investigate the performance of SWCNTs/Graphene/GaAs photodetectors. We measured the optical response of the device at 808 nm. The responsivity was up to 185.16 mA·W⁻¹, and the detectivity was 1.42 × 10¹⁰ Jones. Meanwhile, the device possessed a fast response with rise/fall time of 4.6 μs/30.8 μs at 10 kHz. The results provide a new avenue for the application of near-infrared photodetectors with SWCNTs/GaAs hybrid structures.