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- W1587882109 abstract "Traditional impurity doping schemes are difficult for extreme-gap semiconductors, such as high Al content AlGaN alloys due to the large activation energies for donors and acceptors. Polarization-induced (or Pi-) doping, since its first demonstration [1], is being gradually implemented as an attractive alternative for effective p-type doping in large-bandgap nitride semiconductors both for power electronics, and for deep-UV photonics. Because mobile carriers are field-ionized instead of thermal ionization, they do not freeze out even at cryogenic temperatures. In this work we demonstrate polarization-induced doping deep-UV LEDs emitting in the 235–260 nm (5.25 to 4.75 eV) spectral range at both room temperature and at cryogenic temperatures. The effectiveness of polarization-induced doping is highlighted by a ∼300% increase in the deep-UV EL intensity at 4K compared to the value at 300K." @default.
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- W1587882109 date "2015-06-01" @default.
- W1587882109 modified "2023-10-06" @default.
- W1587882109 title "Deep-UV LEDs using polarization-induced doping: Electroluminescence at cryogenic temperatures" @default.
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- W1587882109 doi "https://doi.org/10.1109/drc.2015.7175559" @default.
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