High‐Performance SiC/Graphene UV‐Visible Band Photodetectors with Grating Structure and Asymmetrical Electrodes for Optoelectronic Logic Gate
Zeyang Zhang,
Cunzhi Sun,
Baihong Zhu
et al.
Abstract:High‐quality epitaxial graphene is prepared on semi‐insulated 4H‐SiC (0001) by ultra‐high vacuum thermal decomposition method and used in graphene/SiC/graphene ultraviolet‐visible dual‐band photodetectors. The dual‐band detector exhibits an extremely low dark current (5.2 × 10−14 A) and a peak responsivity of 1.17 A W−1 corresponding to an external quantum efficiency of 518%. A high detectivity of 3.14 × 1014 Jones is achieved under 280 nm light illumination at 30 V, while a high response speed is obtained wit… Show more
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