Dual‐Channel Solar‐Blind UV Photodetector Based on β‐Ga2O3

Abstract

The photoconductivity (PC) of β‐Ga2O3 single crystals is investigated. A complex PC band is detected in the UV region of 230–270 nm. The PC spectra recorded in polarized light are different for the E∥b and E⊥b orientations of the electric vector of light wave E with respect to the b axis of the β‐Ga2O3 crystal. Anisotropy of PC is utilized to create a dual‐channel UV photodetector with maximum channel sensitivity centered at 245 and 262 nm, for the E∥b and E⊥b orientations, respectively. The sensitivity and some other parameters of the UV photodetector are estimated.