All-printable band-edge modulated ZnO nanowire photodetectors with ultra-high detectivity.

ABSTRACT: High-performance photodetectors are critical for high-speed optical communication and environmental sensing, and flexible photodetectors can be used for a wide range of portable or wearable applications. Here we demonstrate the all-printable fabrication of polycrystalline nanowire-based high-performance photodetectors on flexible substrates. Systematic investigations have shown their ultra-high photoconductive gain, responsivity and detectivity up to 3.3 × 10(17) Jones. Further analysis shows that their high performance originates from the unique band-edge modulation along the nanowire axial direction, where the existence of Schottky barriers in series leads to highly suppressed dark current of the device and also gives rise to fast photoelectric response to low-intensity optical signal ow

SUBMITTER: Liu X 

PROVIDER: S-EPMC4059920 | biostudies-literature | 2014 Jun

REPOSITORIES: biostudies-literature