Ultrasensitive Fiber-Based ZnO Nanowire Network Ultraviolet Photodetector Enabled by the Synergism between Interface...

Area of Science:

• Materials Science
• Nanotechnology
• Optoelectronics

Background:

• Flexible UV photodetectors are crucial for environmental sensing and optical communication.
• Achieving a high on/off ratio in these devices remains a significant challenge.

Purpose of the Study:

• To develop a flexible fiber-based UV photodetector with an ultrahigh on/off ratio.
• To investigate the synergistic effects of interface and surface gating on ZnO nanowire networks.

Main Methods:

• Fabrication of a flexible fiber-based UV photodetector using a ZnO nanowire network.
• Utilizing synergism between interface and surface gating effects.
• Conducting control experiments and Kelvin probe force microscopy (KPFM) measurements.

Main Results:

• Achieved an ultrahigh on/off ratio of 1.98 × 10^8 under 1.0 mW cm^-2 UV illumination.
• Demonstrated a resolution in the nW cm^-2 range for UV light intensity changes.
• Maintained excellent performance even when the photodetector was curved.

Conclusions:

• The synergistic gating effects in ZnO nanowire networks provide an effective route for high-performance flexible UV photodetectors.
• This work offers a new pathway for developing advanced optoelectronic detection devices.