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- W3037086204 abstract "AlGaN-based deep ultraviolet LEDs with high Al composition are promising for many applications, including air- or water-purification, fluorescence sensing, etc. However, to realize their full potential, it is important to understand the impact of the point defects on the device performance. Here, we investigate the defects in the 265 nm AlGaN-based deep ultraviolet LEDs after degradation systematically with a combination of different analytical technologies. The results show that point defects increase after the degradation. The generated defects during the stress lead to a carrier redistribution in the active region and the induced point defects during the degradation are located within the multi-quantum wells (MQWs) region, especially in the first quantum well near the p side of the LED chip. The dislocation lines in the MQWs region were also observed after the degradation, which can lead to the Mg diffusion along the dislocation line. These findings are important to understand the defects in AlGaN quantum wells and further improve AlGaN-based deep ultraviolet LEDs’ performance." @default.
- W3037086204 created "2020-07-02" @default.
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- W3037086204 date "2020-12-01" @default.
- W3037086204 modified "2023-09-28" @default.
- W3037086204 title "The influence of point defects on AlGaN-based deep ultraviolet LEDs" @default.
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- W3037086204 doi "https://doi.org/10.1016/j.jallcom.2020.156177" @default.
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