Fabrication and characterization of an individual ZnO microwire-based UV photodetector

CHAI, G. Y.; CHOW, L.; LUPAN, O.; RUSU, E.; STRATAN, G. I.; HEINRICH, H.; URSAKI, V. V.; TIGINYANU, I. M.

Fabrication and characterization of an individual ZnO microwire-based UV photodetector

CHAI, G. Y.; CHOW, L.; LUPAN, O.; RUSU, E.; STRATAN, G. I.; HEINRICH, H.; URSAKI, V. V.; TIGINYANU, I. M.

URI: https://doi.org/10.1016/j.solidstatesciences.2011.01.010
http://repository.utm.md/handle/5014/8949

Date: 2011

Abstract:

In this paper, a single ZnO microwire-based photodetector for the monitoring of ultraviolet (UV) radiation is described. Single crystal ZnO microwires were synthesized using a chemical vapor deposition (CVD) on the Si or Al2O3 substrate. The UV photodetector was fabricated by using in-situ lift-out method in a focused ion beam system to manipulate individual zinc oxide microwire. The photodetector prototype consists of a single ZnO microwire (20μm in length) and exhibits a response of ~10mA/W for UV light (365 nm) under 1V bias. The transient response measurements revealed relatively fast response. The effect of oxygen adsorption and of different relative humidity conditions on the electronic transport through individual microwire is explored and discussed.