Abstract

High-sensitivity and visible-blind ultraviolet (UV) photoconductive detectors based on SrTiO3 single crystal with interdigitated electrodes are reported. The responsivities of photovoltage and photocurrent can reach 2.13×105VW and 213mAW, respectively, at 330nm at ambient temperature, and the corresponding quantum efficiency η reaches 80.2%. The dark current is lower than 50pA at 10V bias, and the UV/visible contrast ratio is about four orders of magnitude with a sharp cutoff at 390nm. The experimental results demonstrate that SrTiO3 single crystal has potentially wide applications in UV detection.

© 2007 Optical Society of America

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