Abstract
High-sensitivity and visible-blind ultraviolet (UV) photoconductive detectors based on single crystal with interdigitated electrodes are reported. The responsivities of photovoltage and photocurrent can reach and , respectively, at at ambient temperature, and the corresponding quantum efficiency η reaches 80.2%. The dark current is lower than at bias, and the UV/visible contrast ratio is about four orders of magnitude with a sharp cutoff at . The experimental results demonstrate that single crystal has potentially wide applications in UV detection.
© 2007 Optical Society of America
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