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Al-Rich III-Nitride Materials and Ultraviolet Light-Emitting Diodes

  • Jianchang Yan
  • Junxi WangEmail author
  • Yuhuai Liu
  • Jinmin Li
Chapter
Part of the Solid State Lighting Technology and Application Series book series (SSLTA, volume 4)

Abstract

Aluminum nitride (AlN) material is commonly used as a crucial template for the growth of high-quality Al-rich III-nitride materials and high-performance deep-ultraviolet light-emitting diodes (DUV LEDs). In this chapter, the heteroepitaxy of AlN film by MOVPE and the development of AlN epitaxy techniques on sapphire substrates are discussed. The structural design for efficient DUV LEDs is then introduced. Since bulk AlN substrates are a perfect candidate for AlGaN-based DUV LEDs due to similar thermal expansion coefficients and relatively small lattice mismatches, we also discussed AlN homoepitaxy, pseudomorphic AlGaN, and DUV LEDs on AlN substrates. The limited light extraction efficiency (LEE) is another obstacle for power DUV LEDs and their applications. The intrinsic Al-rich-induced optical polarization effect and related methods for improving the LEE are presented.

Notes

Acknowledgments

The author acknowledges contributions of Qingqing Wu and Jiankun Yang for AlN material growth, Lili Sun for structural design for efficient DUV LEDs, and Yanan Guo for the light exaction issues.

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Copyright information

© Springer International Publishing AG, part of Springer Nature 2019

Authors and Affiliations

  • Jianchang Yan
    • 1
    • 2
    • 3
  • Junxi Wang
    • 1
    • 2
    • 3
    Email author
  • Yuhuai Liu
    • 5
    • 6
  • Jinmin Li
    • 4
  1. 1.Institute of Semiconductors, Chinese Academy of SciencesBeijingChina
  2. 2.State Key Laboratory of Solid State LightingBeijingChina
  3. 3.Beijing Engineering Research Center for the 3rd Generation Semiconductor Materials and ApplicationBeijingChina
  4. 4.Chinese Academy of SciencesState Key Laboratory of Solid State Lighting, Solid State Lighting R&D CenterBeijingChina
  5. 5.Zhengzhou UniversityZhengzhouChina
  6. 6.Nagoya UniversityNagoyaJapan

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