Related references
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Article
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IEEE ELECTRON DEVICE LETTERS
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IEEE PHOTONICS JOURNAL
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Summary: This report systematically investigates the impact of different mesa designs on the optical and electrical characteristics of GaN-based micro-LEDs. The results show that using beveled mesas can enhance light extraction efficiency, but it also increases charge-coupling effect and nonradiative recombination.
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Summary: This work reports a feasible approach to increase the light output power and bandwidth of a deep-ultraviolet LED for optical wireless communication. By embedding a SiO2-based microcavity with an aluminum reflector, photon escape from the LED is facilitated to enhance the light extraction efficiency, while the microcavity structure reduces the resistance-capacitance time constant and increases the modulation bandwidth. Experimental results demonstrate a significant enhancement in light output power and modulation bandwidth for the deep-ultraviolet LED with microcavities.
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APPLIED PHYSICS LETTERS
(2022)
Review
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Summary: The study showed that reducing the pixel size of the truncated cone AlGaN DUV micropixel LEDs from 90 to 5 mu m can significantly improve light extraction efficiency by reducing the re-absorption of sideways-travelling photons. In addition, the performance of the device can be further enhanced by coating the sidewall with Al2O3/Al, resulting in a pulsed-mode brightness of 10.3 kW cm(-2) from a single 5 mu m truncated cone micropixel on-wafer.
APPLIED PHYSICS EXPRESS
(2021)
Article
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Meng Tian et al.
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Review
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Summary: This paper reviews recent advances in ultraviolet LEDs and summarizes that multiple physical fields could build a toolkit for effectively controlling and tailoring crucial properties of nitride quantum structures.
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IEEE TRANSACTIONS ON ELECTRON DEVICES
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