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Energy Express

Energy Express

  • Editor: Bernard Kippelen
  • Vol. 19, Iss. S4 — Jul. 4, 2011
  • pp: A962–A971

Wavelength-stable rare earth-free green light-emitting diodes for energy efficiency

Christian Wetzel and Theeradetch Detchprohm  »View Author Affiliations

Optics Express, Vol. 19, Issue S4, pp. A962-A971 (2011)

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Solid state lighting seeks to replace both, incandescent and fluorescent lighting by energy efficient light-emitting diodes (LEDs). Just like compact fluorescent tubes, current white LEDs employ costly rare earth-based phosphors, a drawback we propose to overcome with direct emitting LEDs of all colors. We show the benefits of homoepitaxial LEDs on bulk GaN substrate for wavelength-stable green spectrum LEDs. By use of non-polar growth orientation we avoid big color shifts with drive current and demonstrate polarized light emitters that prove ideal for pairing with liquid crystal display modulators in back light units of television monitors. We further offer a comparison of the prospects of non-polar a- and m-plane growth over conventional c-plane growth.

© 2011 OSA

OCIS Codes
(160.6000) Materials : Semiconductor materials
(260.5430) Physical optics : Polarization
(250.5590) Optoelectronics : Quantum-well, -wire and -dot devices

ToC Category:
Light-Emitting Diodes

Original Manuscript: April 28, 2011
Manuscript Accepted: June 10, 2011
Published: July 1, 2011

Virtual Issues
Optics in LEDS for Lighting (2011) Optics Express

Christian Wetzel and Theeradetch Detchprohm, "Wavelength-stable rare earth-free green light-emitting diodes for energy efficiency," Opt. Express 19, A962-A971 (2011)

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