Journal of the Optical Society of Korea

  • 제16권3호
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  • Pages.292-298
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  • 2012
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  • 1226-4776(pISSN)
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  • 2093-6885(eISSN)
한국광학회 (Optical Society of Korea)
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Epitaxial Structure Optimization for High Brightness InGaN Light Emitting Diodes by Using a Self-consistent Finite Element Method

  • Kim, Kyung-Soo (School of Electronic & Electrical Engineering, Hongik University) ;
  • Yi, Jong Chang (School of Electronic & Electrical Engineering, Hongik University)
  • 투고 : 2012.06.25
  • 심사 : 2012.08.01
  • 발행 : 2012.09.25
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초록

The epitaxial layer structures for blue InGaN light emitting diodes have been optimized for high brightness applications with the output power levels exceeding 1000 $W/cm^2$ by using a self-consistent finite element method. The light-current-voltage relationship has been directly estimated from the multiband Hamiltonian for wurtzite crystals. To analyze the efficiency droop at high injection levels, the major nonradiative recombination processes and carrier spillover have also been taken into account. The wall-plug efficiency at high injection levels up to several thousand $A/cm^2$ has been successfully evaluated for various epilayer structures facilitating optimization of the epitaxial structures for desired output power levels.

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참고문헌

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피인용 문헌

  1. Numerical Study of Enhanced Performance in InGaN Light-Emitting Diodes with Graded-composition AlGaInN Barriers vol.17, pp.1, 2013, https://doi.org/10.3807/JOSK.2013.17.1.016