Ultraviolet fast-response photoelectric effect in tilted orientation SrTiO3 single crystals

Abstract

Ultraviolet photoelectricity based on the vicinal cut as-supplied SrTiO3 single crystals has been experimentally studied in the absence of an applied bias at room temperature. An open-circuit photovoltage of 130ps rise time and 230ps full width at half maximum was observed under the irradiation of a 355nm pulsed laser of 25ps in duration. The dependence of the photoelectric effect on the tilting angles was studied, and the optimum angle is 20.9°. Seebeck effect is proposed to elucidate the tilting angle dependence of laser-induced photovoltage. This work demonstrates the potential of SrTiO3 single crystals in ultraviolet detection.