Journal of Synthetic Crystals, Volume. 54, Issue 6, 970(2025)

Sidewall Repair Improves Optical Power Density of 237 nm AlGaN-Based Micro-LEDs

Jialong HAO, Hongbo LI, Shunpeng LYU*, Licai ZHU, Wenchao SUN, Ruojia ZHANG, Zhongxu LIU, Ke JIANG, Jianwei BEN, Shanli ZHANG*, Xiaojuan SUN, and Dabing LI
Author Affiliations
  • State Key Laboratory of Luminescence Science and Technology, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun130033, China
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    Figures & Tables(6)
    (a) Schematic diagram of the epitaxial layer structure; (b)~(d) schematic diagrams of Micro-LED structures; (e) optical microscope image of Micro-LED; (f) electroluminescence (EL) spectra of the epitaxial layers
    Current density-voltage characteristic curves of S1, S2, S3 before (a) and after (b) the sidewall repair; optical power density-current density characteristic curves of S1, S2, S3 before (c) and after (d) the sidewall repair
    Simulation results of Micro-LEDs of different sizes (without considering sidewall effects). (a) Current density-voltage characteristic curves; (b) optical power density-current density characteristic curves; (c) relationship curves between IQE and current density; (d) lateral distribution of carrier concentration in the quantum wells (the small inset in the figure is a schematic diagram of the data extraction position)
    Schematic diagram of the device current path. (a) Single mesa; (b) arrayed mesa
    Current density-voltage characteristic curves of S3, S4, S5 before (a) and after (b) sidewall repair; optical power density-current density characteristic curves of S3, S4, S5 before (c) and after (d) sidewall repair
    • Table 1. Basic information of Micro LED

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      Table 1. Basic information of Micro LED

      SampleMesa radius/μmMatrixp-contact radius/μm
      S112.51×17.5
      S225.01×120.0
      S350.01×145.0
      S425.02×220.0
      S512.54×47.5
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    Jialong HAO, Hongbo LI, Shunpeng LYU, Licai ZHU, Wenchao SUN, Ruojia ZHANG, Zhongxu LIU, Ke JIANG, Jianwei BEN, Shanli ZHANG, Xiaojuan SUN, Dabing LI. Sidewall Repair Improves Optical Power Density of 237 nm AlGaN-Based Micro-LEDs[J]. Journal of Synthetic Crystals, 2025, 54(6): 970

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    Paper Information

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    Received: Nov. 4, 2024

    Accepted: --

    Published Online: Jul. 8, 2025

    The Author Email: Shunpeng LYU (lvshunpeng@ciomp.ac.cn), Shanli ZHANG (zhangshanli@ciomp.ac.cn)

    DOI:10.16553/j.cnki.issn1000-985x.2024.0274

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