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- W4324133080 abstract "In recent years, reports on highly efficient UV LEDs and UV laser diodes have been published one after another. Considering the application field of UV semiconductor light-emitting devices, it is essential to achieve high output, i.e., high current density operation, and it is important to establish a fabrication process for vertical devices to realize this. A 1cm square wafer with deep-UV LEDs stacked on a sapphire substrate was successfully separated from the substrate to fabricate vertical LEDs. In this study, an Al0.68Ga0.32N underling layer was formed on an AlN template with periodic pillars, and a process that enables reproducible substrate detachment was successfully developed. The fabricated vertical LEDs successfully exhibit remarkable luminescence characteristics (peak wavelength: 298 nm) up to a current density of ~43 kA cm<sup>-2</sup> at room temperature and pulse driving. Applications to high-power ultraviolet region LEDs and laser diodes are expected." @default.
- W4324133080 created "2023-03-15" @default.
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- W4324133080 date "2023-03-17" @default.
- W4324133080 modified "2023-09-30" @default.
- W4324133080 title "Fabrication of vertical UV light-emitting devices by separation of sapphire substrates (Conference Presentation)" @default.
- W4324133080 doi "https://doi.org/10.1117/12.2646756" @default.
- W4324133080 hasPublicationYear "2023" @default.
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