Applied Physics A

, Volume 104, Issue 2, pp 621–626 | Cite as

Investigation of blue InGaN light-emitting diodes with step-like quantum well

Article

Abstract

The concept of a step-like quantum well is proposed with the purpose to reduce the influence of electrostatic field resulting from the piezoelectric effect on the optical performance of blue InGaN light-emitting diodes. Particularly, the optical properties of the LED structures with the In0.23Ga0.77N single quantum well, In0.20Ga0.80N/In0.26Ga0.74N step-like quantum well, and In0.26Ga0.74N/In0.20Ga0.80N step-like quantum well are numerically investigated in detail. Simulation results show that the In0.20Ga0.80N/In0.26Ga0.74N step-like-quantum-well LED structure has the best optical performance in virtue of the improvement in spatial overlap of electrons and holes in the quantum well.

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Copyright information

© Springer-Verlag 2011

Authors and Affiliations

  • Miao-Chan Tsai
    • 1
  • Sheng-Horng Yen
    • 2
  • Yen-Kuang Kuo
    • 3
  1. 1.Institute of PhotonicsNational Changhua University of EducationChanghuaTaiwan
  2. 2.R&D Division, Epistar Co., Ltd.Science-based Industrial ParkHsinchuTaiwan
  3. 3.Department of PhysicsNational Changhua University of EducationChanghuaTaiwan

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