Micro-Light Emitting Diode: From Chips to Applications

Peter J. Parbrook, Brian Corbett, Jung Han, Tae Yeon Seong, Hiroshi Amano

Research output: Contribution to journalReview articlepeer-review

122 Citations (Scopus)


Typical light-emitting diodes (LEDs) have a form factor >(300 × 300) µm2. Such LEDs are commercially mature in illumination and ultralarge displays. However, recent LED research includes shrinking individual LED sizes from side lengths >300 µm to values <100 µm, leading to devices called micro-LEDs. Their advent creates a number of exciting new application spaces. Here, a review of the principles and applications of micro-LED technology is presented. In particular, the implications of reduced LED size in necessitating mitigation strategies for nonradiative device edge damage as well as the potential for higher drive current densities are discussed. The opportunities to integrate micro-LEDs with electronics, and into large-scale arrays, allow pixel addressable scalable integrated displays, while the small micro-LED size is ideal for high-speed modulation for visible light communication, and for integration into biological systems as part of optogenetic therapies.

Original languageEnglish
Article number2000133
JournalLaser and Photonics Reviews
Issue number5
Publication statusPublished - 2021 May

Bibliographical note

Funding Information:
T.‐Y.S. and H.A. gratefully acknowledge financial support from National Research Foundation of Korea funded by the Ministry of Science and ICT (Global Research Laboratory program: NRF‐2017K1A1A2013160). P.J.P. and B.C. gratefully acknowledge support from Science Foundation Ireland: Grant No. 12/RC/2276_P2 and from the European Union Horizon 2020 Programme: Grant 767092.

Publisher Copyright:
© 2021 The Authors. Laser & Photonics Reviews published by Wiley-VCH GmbH


  • displays
  • integrated circuits
  • micro-LEDs
  • size dependence
  • transfer technologies
  • visible light communication

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics


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