Abstract
We demonstrate a nickel/insulating-GaN (i-GaN)/p-type GaN junction and investigate its electrical properties. The i-GaN is formed by exposure to a low-power hydrogen plasma to passivate the p-GaN layer. Cathodoluminescence spectroscopy of the i-GaN is used to understand the passivation effect of the hydrogen plasma on p-GaN. The junction shows very low leakage (<10-9 A at -50 V), excellent rectifying properties (∼107), high temperature stability, and blue light electroluminescence at forward bias. A bandgap model is proposed to illustrate the electrical properties of hydrogenated p-GaN and to understand the device characteristics.
Original language | English (US) |
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Article number | 052105 |
Journal | Applied Physics Letters |
Volume | 117 |
Issue number | 5 |
DOIs | |
State | Published - Aug 3 2020 |
Externally published | Yes |
ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)