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- W2342339541 abstract "Abstract We transferred AlGaN/GaN high-electron-mobility transistors (HEMTs) from a sapphire substrate to a copper plate using the hexagonal boron nitride epitaxial lift-off technique. After transfer, the negative slope in the drain current I d decreased owing to the suppression of the self-heating effect. The significant increase in I d and the negative shift of threshold voltage indicate an increase in two-dimensional electron gas (2DEG) density. The increase in 2DEG density is at least partially caused by the reduction in compressive stress in the GaN layer after the transfer, which is revealed from the E 2 peak shifts of −1.3 cm −1 in Raman spectroscopy measurements. We also estimated the temperature in the active region of HEMTs by micro-Raman spectroscopy. For the transferred HEMT, the temperature at the gate edge on the drain side was 100 °C at a power dissipation of 0.9 W. In contrast, the temperature reached 240 °C at a power dissipation of only 0.7 W for the HEMT on the sapphire substrate. This indicates that the transfer technique can enhance the performance of AlGaN/GaN HEMTs." @default.
- W2342339541 created "2016-06-24" @default.
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- W2342339541 date "2016-04-21" @default.
- W2342339541 modified "2023-10-18" @default.
- W2342339541 title "Enhancement of performance of AlGaN/GaN high-electron-mobility transistors by transfer from sapphire to a copper plate" @default.
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- W2342339541 doi "https://doi.org/10.7567/jjap.55.05fh07" @default.
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