$\hbox {Zr}_{x}\hbox {Ti}_{1 - x}\hbox {O}_{2}$ -Based Ultraviolet Detectors Series

In this letter, Zr_xTi_1-xO₂-based ultraviolet (UV) detector series with Pt electrodes were fabricated. The Zr_xTi_1-xO₂thin films were prepared by a sol-gel method and characterized by means of X-ray diffraction and UV-visible absorption spectra. At 5 V bias, the dark currents of the detectors were less than 7 nA; under radiation of UV light, a high responsivity rate of 470 A/W was achieved at 270 nm for the Zr_0.1Ti_0.9O₂ detector. The results showed that, at low Zr doping, the photoresponse was greatly improved, whereas at high Zr doping, the response peaks shift to the short-wavelength direction, which provides a new platform to fabricate solar-blind UV detectors.