GaN Heterostructure Barrier Diodes Exploiting Polarization-Induced δ-Doping
نویسندگان
چکیده
A GaN-based heterostructure barrier diode (HBD) similar to GaAs planar-doped barrier diodes is demonstrated. Instead of doping with impurities, the polarization-induced sheet charge at the III-nitride heterojunction behaves as an effective δ-doping. An AlGaN/GaN heterostructure is used for the demonstration. The rectifying characteristics of the polarizationinduced GaN HBDs can be tuned by controlling the graded AlGaN thickness and composition. Such polarization-engineered HBDs can find applications in high-voltage and high-frequency electronics.
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