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
  • show less
    References(40)

    [1] LI D B, JIANG K, SUN X J et al. AlGaN photonics: recent advances in materials and ultraviolet devices. Advances in Optics and Photonics, 10, 43(2018).

    [2] ZHOU Z, MIAO W N, LI Y et al. Influence mechanism of GaN-LED’s PN junction area on modulation bandwidth in visible light communication. Optics and Precision Engineering, 28, 1494-1499(2020).

    [3] TIAN P F, SHAN X Y, ZHU S J et al. AlGaN ultraviolet micro-LEDs. IEEE Journal of Quantum Electronics, 58, 1-14(2022).

    [4] LEE V W, KYMISSIS I. Micro-LED technologies and applications. Information Display, 32, 16-23(2016).

    [5] YU H B, YAO J K, MEMON M H et al. Vertically integrated self-monitoring AlGaN-based deep ultraviolet micro-LED array with photodetector via a transparent sapphire substrate toward stable and compact maskless photolithography application. Laser & Photonics Reviews, 2401220(2024).

    [6] FENG F, ZHANG K, LIU Y B et al. AlGaN-based deep-UV micro-LED array for quantum dots converted display with ultra-wide color gamut. IEEE Electron Device Letters, 43, 60-63(2022).

    [7] WANG D K, HU H L, GUO T L et al. Ultra-high resolution LED display. Chinese Journal of Luminescence, 44, 1721-1732(2023).

    [8] GUO C H, SUN X J, GUO K et al. Recent progress of solar blind light emitting diodes for ultraviolet optical wireless communication use. Chinese Journal of Luminescence, 44, 1849-1861(2023).

    [9] KIM D Y, PARK J H, LEE J W et al. Overcoming the fundamental light-extraction efficiency limitations of deep ultraviolet light-emitting diodes by utilizing transverse-magnetic-dominant emission. Light: Science & Applications, 4(2015).

    [10] KNEISSL M, SEONG T Y, HAN J et al. The emergence and prospects of deep-ultraviolet light-emitting diode technologies. Nature Photonics, 13, 233-244(2019).

    [11] YANG H, HUANG W J, ZHANG-HU M Y et al. Investigation of external quantum efficiency of GaN-based Micro-LEDs. Semiconductor Optoelectronics, 43, 522-528(2022).

    [12] HWANG S, ISLAM M, ZHANG B et al. A hybrid micro-pixel based deep ultraviolet light-emitting diode lamp. Applied Physics Express, 4(2011).

    [13] ZHOU J, YAN J J, LIU Z Q et al. The current bottleneck and technical progress of micro LED. Optoelectronic Technology, 43, 91-113(2023).

    [14] LU S P, ZHANG Y P, ZHANG Z H et al. High-performance triangular miniaturized-LEDs for high current and power density applications. ACS Photonics, 8, 2304-2310(2021).

    [15] LU S P, LIU W, ZHANG Z H et al. Low thermal-mass LEDs: size effect and limits. Optics Express, 22, 32200-32207(2014).

    [16] OLIVIER F, DAAMI A, LICITRA C et al. Shockley-Read-Hall and auger non-radiative recombination in GaN based LEDs: a size effect study. Applied Physics Letters, 111(2017).

    [17] WANG W D, CHU C S, ZHANG D Y et al. Impact of auger recombination, electron leakage and hole injection on efficiency droop for DUV LEDs. Chinese Journal of Luminescence, 42, 897-903(2021).

    [18] CAI X, XU Y, CAO B et al. Sidewall damage and optical properties of micro-LED. Journal of Synthetic Crystals, 52, 812-817(2023).

    [19] KOU J Q, SHEN C C, SHAO H et al. Impact of the surface recombination on InGaN/GaN-based blue micro-light emitting diodes. Optics Express, 27, A643-A653(2019).

    [20] MA Z H, JI Y, HU T G et al. Numerical analysis of the influence of sidewall defects on AlGaN-based deep ultraviolet micro-light emitting diodes. Current Applied Physics, 67, 101-106(2024).

    [21] PARK J H, PRISTOVSEK M, CAI W T et al. Dislocation suppresses sidewall-surface recombination of micro-LEDs. Laser & Photonics Reviews, 17, 2300199(2023).

    [22] MEHNKE F, TRINH X T, PINGEL H et al. Electronic properties of Si-doped AlxGa1-xN with aluminum mole fractions above 80%, 120, 145702(2016).

    [23] JIANG K, SUN X J, SHI Z M et al. Quantum engineering of non-equilibrium efficient p-doping in ultra-wide band-gap nitrides. Light, Science & Applications, 10, 69(2021).

    [24] HASAN M S, MEHEDI I M, FARUK REZA S M et al. Analytical investigation of activation energy for Mg-doped p-AlGaN. Optical and Quantum Electronics, 52, 348(2020).

    [25] YU H B, MEMON M H, WANG D H et al. AlGaN-based deep ultraviolet micro-LED emitting at 275 nm. Optics Letters, 46, 3271-3274(2021).

    [26] FENG F, ZHANG K, LIU Y B et al. AlGaN-based deep-UV micro-LED array for quantum dots converted display with ultra-wide color gamut. IEEE Electron Device Letters, 43, 60-63(2022).

    [27] LIU Z Y, LU Y, CAO H C et al. Etching-free pixel definition in InGaN green micro-LEDs. Light, Science & Applications, 13, 117(2024).

    [28] LEE D H, LEE J H, PARK J S et al. Improving the leakage characteristics and efficiency of GaN-based micro-light-emitting diode with optimized passivation. ECS Journal of Solid State Science and Technology, 9(2020).

    [29] WONG M S, HWANG D, ALHASSAN A I et al. High efficiency of III-nitride micro-light-emitting diodes by sidewall passivation using atomic layer deposition. Optics Express, 26, 21324-21331(2018).

    [30] TIAN P F, MCKENDRY J J D, GONG Z et al. Size-dependent efficiency and efficiency droop of blue InGaN micro-light emitting diodes. Applied Physics Letters, 101, 231110(2012).

    [31] WONG M S, LEE C M, MYERS D J et al. Size-independent peak efficiency of III-nitride micro-light-emitting-diodes using chemical treatment and sidewall passivation. Applied Physics Express, 12(2019).

    [32] ZHU Z F, TAO T, LIU B et al. Improved optical and electrical characteristics of GaN-based micro-LEDs by optimized sidewall passivation. Micromachines, 14, 10(2022).

    [33] ELIASHEVICH I, LI Y X, OSINSKY A et al. InGaN blue light-emitting diodes with optimized n-GaN layer, 28-36(1999).

    [34] HAO G D, TANIGUCHI M, TAMARI N et al. Current crowding and self-heating effects in AlGaN-based flip-chip deep-ultraviolet light-emitting diodes. Journal of Physics D: Applied Physics, 51(2018).

    [35] LU S P, BAI J X, LI H B et al. 240 nm AlGaN-based deep ultraviolet micro-LEDs: size effect versus edge effect. Journal of Semiconductors, 45(2024).

    [36] WANG Z, SHAN X Y, ZHU S J et al. Size-dependent sidewall defect effect of GaN blue micro-LEDs by photoluminescence and fluorescence lifetime imaging. Optics Letters, 48, 4845-4848(2023).

    [37] TAI J P, GUO W L, LI M M et al. GaN based micro-light-emitting diode size effect and array display. Acta Physica Sinica, 69, 177301(2020).

    [38] LIANG K L, KUO W H, LIN C C et al. The size-dependent photonic characteristics of colloidal-quantum-dot-enhanced micro-LEDs. Micromachines, 14, 589(2023).

    [39] MCKENDRY J J D, GREEN R P, KELLY A E et al. High-speed visible light communications using individual pixels in a micro light-emitting diode array. IEEE Photonics Technology Letters, 22, 1346-1348(2010).

    [40] LI H B, LU S P, ZHU L C et al. Efficiency boosting of 236 nm AlGaN-based micro-LEDs. Journal of Physics D: Applied Physics, 58(2025).

    Tools

    Get Citation

    Copy Citation Text

    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

    Download Citation

    EndNote(RIS)BibTexPlain Text
    Save article for my favorites
    Paper Information

    Category:

    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

    Topics