Inventors at Georgia Tech have developed a method to improve the sensitivity and reset time of ZnO nanowire nanosensors. By fabricating Schottky type devices instead of Ohmic type devices, the UV sensitivity of ZnO nanowire nanosensors has been improved by four orders of magnitude, and the reset time has been greatly decreased. This method produces a UV sensor with fast response speed, high spectrum selectivity, and high photosensitivity.
- Improved response/reset speed — using the Schottky contacts and surface functionalization leads to improved response speed
- Increased sensitivity — sensitivity improved by four orders of magnitude
- Commercial, military, and space sensors
- Gas sensors
- Strain sensors
Ultraviolet (UV) photon detectors have a wide range of applications including environmental monitoring, missile launching detection, space research, high temperature flame detection, and more. Fast response time, fast reset time, high selectivity, high responsivity, and good signal-to-noise ratio are desired characteristics for these applications. Current UV photodetectors require extra filters to attenuate unwanted radiation and need to be cooled to a low temperature to perform properly. There is a need for UV photodetectors that can be fabricated at low cost and are able to work at room temperature.