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- W3201195557 abstract "The present work reports on the hydrogen gas detection properties of Pt-AlGaN/GaN high electron mobility transistor (HEMT) sensors with recessed gate structure. Devices with gate recess depths from 5 to 15 nm were fabricated using a precision cyclic etching method, examined with AFM, STEM and EDS, and tested towards H 2 response at high temperature. With increasing recess depth, the threshold voltage (VTH) shifted from -1.57 to 1.49 V. A shallow recess (5 nm) resulted in a 1.03 mA increase in signal variation (AIDS), while a deep recess (15 nm) resulted in the highest sensing response (S) of 145.8% towards 300 ppm H 2 as compared to reference sensors without gate recess. Transient measurements demonstrated reversible H 2 response for all tested devices. The response and recovery time towards 250 ppm gradually decreased from 7.3 to 2.5 min and from 29.2 to 8.85 min going from 0 nm to 15 nm recess depth. The power consumption of the sensors reduced with increasing recess depth from 146.6 to 2.95 mW." @default.
- W3201195557 created "2021-09-27" @default.
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- W3201195557 date "2020-01-01" @default.
- W3201195557 modified "2023-10-15" @default.
- W3201195557 title "The Impact of Gate Recess on the H2 Detection Properties of Pt-AlGaN/GaN HEMT Sensors" @default.
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