University of Exeter demonstrates graphene-based UV photodetector with 10x faster response
The University of Exeter's Centre for Graphene Science demonstrated a graphene-zinc oxide heterostructure UV photodetector with an 8-nanosecond response time at 365 nm, 10x faster than commercial silicon devices, as published in Advanced Materials. The result advances graphene's case as a functional material in high-speed optoelectronics, with Hamamatsu Photonics engaged for industrial-scale validation and patents filed across three jurisdictions.
The University of Exeter's Centre for Graphene Science has developed a graphene-based ultraviolet photodetector that offers a response time ten times faster than existing commercial silicon-based devices. The device utilizes a vertical heterostructure design, integrating graphene with a 5-nanometer layer of zinc oxide. It achieves a response time of 8 nanoseconds under 365 nm illumination and a detectivity exceeding 10^12 Jones. This advancement has potential applications in high-speed UV imaging for industrial inspection, photolithography metrology, and astronomy. The research, led by Professor Saverio Russo, is published in Advanced Materials. The University of Exeter is working with Hamamatsu Photonics to validate the technology on an industrial scale, with patents filed in the UK, US, and Japan.
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