The emergence and prospects of deep-ultraviolet light-emitting diode technologies

Michael Kneissl, Tae Yeon Seong, Jung Han, Hiroshi Amano

Research output: Contribution to journalReview article

25 Citations (Scopus)

Abstract

By alloying GaN with AlN the emission of AlGaN light-emitting diodes can be tuned to cover almost the entire ultraviolet spectral range (210–400 nm), making ultraviolet light-emitting diodes perfectly suited to applications across a wide number of fields, whether biological, environmental, industrial or medical. However, technical developments notwithstanding, deep-ultraviolet light-emitting diodes still exhibit relatively low external quantum efficiencies because of properties intrinsic to aluminium-rich group III nitride materials. Here, we review recent progress in the development of AlGaN-based deep-ultraviolet light-emitting devices. We also describe the key obstacles to enhancing their efficiency and how to improve their performance in terms of defect density, carrier-injection efficiency, light extraction efficiency and heat dissipation.

Original languageEnglish
Pages (from-to)233-244
Number of pages12
JournalNature Photonics
Volume13
Issue number4
DOIs
Publication statusPublished - 2019 Apr 1

Fingerprint

ultraviolet radiation
Light emitting diodes
light emitting diodes
carrier injection
Defect density
Aluminum
Heat losses
Quantum efficiency
Alloying
Nitrides
alloying
nitrides
quantum efficiency
dissipation
aluminum
cooling
defects
Ultraviolet Rays
aluminum gallium nitride

ASJC Scopus subject areas

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

Cite this

The emergence and prospects of deep-ultraviolet light-emitting diode technologies. / Kneissl, Michael; Seong, Tae Yeon; Han, Jung; Amano, Hiroshi.

In: Nature Photonics, Vol. 13, No. 4, 01.04.2019, p. 233-244.

Research output: Contribution to journalReview article

Kneissl, Michael ; Seong, Tae Yeon ; Han, Jung ; Amano, Hiroshi. / The emergence and prospects of deep-ultraviolet light-emitting diode technologies. In: Nature Photonics. 2019 ; Vol. 13, No. 4. pp. 233-244.
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