Sökresultat - Ce Sun

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  1. 1
    Enhancing Both TM- and TE-Polarized Light Extraction Efficiency of AlGaN-Based Deep Ultraviolet Light-Emitting Diode via Air Cavity Extractor With Vertical Sidewall

    Enhancing Both TM- and TE-Polarized Light Extraction Efficiency of AlGaN-Based Deep Ultraviolet Light-Emitting Diode via Air Cavity Extractor With Vertical Sidewall av Yonghui Zhang, Yuxin Zheng, Ruilin Meng, Ce Sun, Kangkai Tian, Chong Geng, Zi-Hui Zhang, Guoxu Liu, Wengang Bi

    Publicerad 2018-01-01

    In this work, we investigate the effect of sidewall angle, height and space of an air cavity extractor (AC-Extractor) on the polarization-dependent light extraction efficiency (LEE) for AlGaN-based deep-ultraviolet light-emitting diodes (DUV LEDs) using three-dimensional finite difference time-domai...

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  2. 2
    The Effect of Sapphire Substrates on Omni-Directional Reflector Design for Flip-Chip Near-Ultraviolet Light-Emitting Diodes

    The Effect of Sapphire Substrates on Omni-Directional Reflector Design for Flip-Chip Near-Ultraviolet Light-Emitting Diodes av Yonghui Zhang, Ji Zhang, Yuxin Zheng, Ce Sun, Kangkai Tian, Chunshang Chu, Zi-Hui Zhang, Jay Guoxu Liu, Wengang Bi

    Publicerad 2019-01-01

    In this paper, we investigate the effect of omni-directional reflectors (ODRs) on the light extraction efficiency (LEE) for flip-chip near-ultraviolet light-emitting diodes (LEDs) on patterned (PSS) and flat sapphire substrate (FSS) using three-dimensional finite-difference time-domain method. Diffe...

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  3. 3
    Non-linear association between serum levels of vitamins A and B12 and accelerated epigenetic aging

    Non-linear association between serum levels of vitamins A and B12 and accelerated epigenetic aging av Zhimin Ma, Mingxing An, Weiwei Gong, Xiangyu Chen, Mingbin Liang, Jie Zhang, Xiaofu Du, Feng Lu, Qingfang He, Meng Wang, Jieming Zhong, Ce Sun

    Publicerad 2025-07-01

    BackgroundSerum vitamins A and B12, as essential micronutrients, play pivotal roles in maintaining physiological homeostasis; however, the association between these vitamins and aging remains unclear. Therefore, this study aims to investigate potential threshold effects of these nutrients on acceler...

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