Blue light emitting diodes grown on freestanding (11-20) a -plane GaN substrates

J. P. Liu, J. B. Limb, J. H. Ryou, D. Yoo, C. A. Horne, R. D. Dupuis, Z. H. Wu, A. M. Fischer, Fernando Ponce, A. D. Hanser, L. Liu, E. A. Preble, K. R. Evans

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31 Scopus citations

Abstract

Visible blue light emitting diodes have been produced on freestanding nonpolar GaN (11-20) a -plane substrates by metal-organic chemical vapor deposition. The growth conditions have been optimized for smooth growth morphology of GaN nonpolar homoepitaxial layers without surface features, leading to light emitting diode epitaxial structures that are free of crystalline defects such as threading dislocations and stacking faults. Electroluminescence of light emitting diodes exhibit peak wavelengths of ∼450 nm and are independent of current level at low current densities before the heating effects are evidenced.

Original languageEnglish (US)
Article number011123
JournalApplied Physics Letters
Volume92
Issue number1
DOIs
StatePublished - Jan 16 2008

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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