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Development of fin-LEDs for next-generation inorganic displays using face-selective dielectrophoretic assembly

Author

Listed:
  • SeungJe Lee

    (Kookmin University)

  • Yun Jae Eo

    (Kookmin University)

  • Minji Ko

    (Kookmin University)

  • Soomin Ahn

    (Kookmin University)

  • Selim Yun

    (Kookmin University)

  • Hyeng Jin Kim

    (Kookmin University)

  • Eunha Hong

    (Kookmin University)

  • Yuna Kwon

    (Kookmin University)

  • Huiyeong Kang

    (Kookmin University)

  • Yong Jae Lee

    (Kookmin University)

  • Gang Yeol Yoo

    (Korea Electronics Technology Institute)

  • Keyong Nam Lee

    (Kookmin University)

  • Jae Kyu Song

    (Kyung Hee University)

  • Jong Kyu Kim

    (Pohang University of Science and Technology (POSTECH))

  • Hyun Min Cho

    (Korea Electronics Technology Institute)

  • Young Rag Do

    (Kookmin University)

Abstract

Micro-light-emitting diodes offer vibrant colors and energy-efficient performance, holding promise for next-generation inorganic displays. However, their widespread adoption requires the development of cost-effective chips and low-defect pixelation processes. Addressing these challenges, nanorod-light-emitting diodes utilize inkjet and dielectrophoretic assembly techniques. Nevertheless, the small volume and edge-directed emission of nanorod-light-emitting diodes necessitate brightness and light extraction improvements. As an alternative, we propose dielectrophoretic-friendly fin-light-emitting diodes, designed to enhance brightness and light extraction efficiency through face-selective dielectrophoretic assembly technology. Our results confirm the potential for next-generation inorganic displays, with a wafer utilization ratio exceeding 90%, a vertical assembly ratio of 91.3%, and a pixel production yield of 99.93%. Moreover, blue fin-light-emitting diodes achieve an external quantum efficiency of 9.1% and a brightness of 8640 cd m−2 at 5.0 V, which, even at this early stage, are comparable to existing technologies.

Suggested Citation

  • SeungJe Lee & Yun Jae Eo & Minji Ko & Soomin Ahn & Selim Yun & Hyeng Jin Kim & Eunha Hong & Yuna Kwon & Huiyeong Kang & Yong Jae Lee & Gang Yeol Yoo & Keyong Nam Lee & Jae Kyu Song & Jong Kyu Kim & Hy, 2024. "Development of fin-LEDs for next-generation inorganic displays using face-selective dielectrophoretic assembly," Nature Communications, Nature, vol. 15(1), pages 1-10, December.
    • Handle: RePEc:nat:natcom:v:15:y:2024:i:1:d:10.1038_s41467-024-53965-0
    DOI: 10.1038/s41467-024-53965-0
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    References listed on IDEAS

    as
    1. Mihyang Sheen & Yunhyuk Ko & Dong-uk Kim & Jongil Kim & Jin-ho Byun & YongSeok Choi & Jonghoon Ha & Ki Young Yeon & Dohyung Kim & Jungwoon Jung & Jinyoung Choi & Ran Kim & Jewon Yoo & Inpyo Kim & Chan, 2022. "Highly efficient blue InGaN nanoscale light-emitting diodes," Nature, Nature, vol. 608(7921), pages 56-61, August.
    2. Wonjae Chang & Jungsub Kim & Myoungsoo Kim & Min Woo Lee & Chung Hyun Lim & Gunho Kim & Sunghyun Hwang & Jeeyoung Chang & Young Hwan Min & Kiseong Jeon & Soohyun Kim & Yoon-Ho Choi & Jeong Soo Lee, 2023. "Concurrent self-assembly of RGB microLEDs for next-generation displays," Nature, Nature, vol. 617(7960), pages 287-291, May.
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