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Journal of Display Technology

Journal of Display Technology

| A JOINT IEEE/OSA PUBLICATION

  • Vol. 9, Iss. 4 — Apr. 1, 2013
  • pp: 190–198

Semipolar (20-2-1) InGaN/GaN Light-Emitting Diodes for High-Efficiency Solid-State Lighting

Daniel F. Feezell, James S. Speck, Steven P. DenBaars, and Shuji Nakamura

Journal of Display Technology, Vol. 9, Issue 4, pp. 190-198 (2013)


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Abstract

This work examines the effects of polarization-related electric fields on the energy band diagrams, wavelength shift, wave function overlap, and efficiency droop for InGaN quantum wells on various crystal orientations, including polar (0001) (c-plane), semipolar (20-21), semipolar (20-2-1, and nonpolar (10-10) (m-plane). Based on simulations, we show that the semipolar (20-2-1) orientation exhibits excellent potential for the development of high-efficiency, low-droop light-emitting diodes (LEDs). We then present recent advancements in crystal growth, optical performance, and thermal performance of semipolar (20-2-1) LEDs. Finally, we demonstrate a low-droop, high-efficiency single-quantum-well blue semipolar (20-2-1) LED with an external quantum efficiency of more than 50% at 100 A/cm2.

© 2013 IEEE

Citation
Daniel F. Feezell, James S. Speck, Steven P. DenBaars, and Shuji Nakamura, "Semipolar (20-2-1) InGaN/GaN Light-Emitting Diodes for High-Efficiency Solid-State Lighting," J. Display Technol. 9, 190-198 (2013)
http://www.opticsinfobase.org/jdt/abstract.cfm?URI=jdt-9-4-190

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