Applied Physics A

, 97:705 | Cite as

Theoretical investigation of Auger recombination on internal quantum efficiency of blue light-emitting diodes

  • S.-H. Yen
  • M.-C. Tsai
  • M.-L. Tsai
  • Y.-J. Shen
  • T.-C. Hsu
  • Y.-K. Kuo
Article

Abstract

The Auger recombination is recently proposed as one of the possible origins for the deteriorated internal quantum efficiency of InGaN light-emitting diodes. The Auger recombination behavior is quite different under widely varied Auger coefficients. The effect of Auger coefficient on the efficiency and output power is investigated numerically. The simulation results indicate that the Auger recombination with large Auger coefficient greatly decreases the efficiency in the whole current range under study. It is found that the electron current leakage and nonuniform hole distribution are the possible mechanisms responsible for the efficiency droop at high injection current.

PACS

42.25.Ja 61.72.uj 61.82.Fk 73.21.Fg 78.55.Cr 

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Copyright information

© Springer-Verlag 2009

Authors and Affiliations

  • S.-H. Yen
    • 1
  • M.-C. Tsai
    • 2
  • M.-L. Tsai
    • 1
  • Y.-J. Shen
    • 1
  • T.-C. Hsu
    • 1
  • Y.-K. Kuo
    • 3
  1. 1.R&D Division, Epistar Co., Ltd.Science-based Industrial ParkHsinchuTaiwan
  2. 2.Institute of PhotonicsNational Changhua University of EducationChanghuaTaiwan
  3. 3.Department of PhysicsNational Changhua University of EducationChanghuaTaiwan

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