Green semipolar (202̄1̄) InGaN light-emitting diodes with small wavelength shift and narrow spectral linewidth

Yuji Zhao, Sang Ho Oh, Feng Wu, Yoshinobu Kawaguchi, Shinichi Tanaka, Kenji Fujito, James S. Speck, Steven P. DenBaars, Shuji Nakamura

Research output: Contribution to journalArticle

59 Citations (Scopus)

Abstract

We study the optical spectral properties for green semipolar (202̄1̄) and (202̄1) light-emitting diode (LED) with same indium compositions. Compared to (202̄1) devices, the fabricated (202̄1̄) micro-LED (∼0.005mm2) showed negligible blue shift and smaller full width at half maximum (FWHM) up to extremely high current densities (10,000 A/cm2). Theoretical simulation indicates that the (202̄1̄) InGaN quantum well (QW) has reduced polarization-related effects due to combined effects of electric field cancelling and Coulomb screening effect. In addition, the packaged device performance for small-area (∼0.144mm2) semipolar green (202̄1̄) and (202̄1) LEDs were also discussed. The green (202̄1̄) LED showed smaller wavelength shift and narrower FWHM than green LEDs fabricated on other planes.

Original languageEnglish (US)
Article number062102
JournalApplied Physics Express
Volume6
Issue number6
DOIs
StatePublished - Jun 2013
Externally publishedYes

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Linewidth
Light emitting diodes
light emitting diodes
Wavelength
shift
wavelengths
Full width at half maximum
blue shift
Indium
Semiconductor quantum wells
indium
high current
Screening
Current density
screening
Electric fields
quantum wells
Polarization
current density
electric fields

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)

Cite this

Green semipolar (202̄1̄) InGaN light-emitting diodes with small wavelength shift and narrow spectral linewidth. / Zhao, Yuji; Oh, Sang Ho; Wu, Feng; Kawaguchi, Yoshinobu; Tanaka, Shinichi; Fujito, Kenji; Speck, James S.; DenBaars, Steven P.; Nakamura, Shuji.

In: Applied Physics Express, Vol. 6, No. 6, 062102, 06.2013.

Research output: Contribution to journalArticle

Zhao, Y, Oh, SH, Wu, F, Kawaguchi, Y, Tanaka, S, Fujito, K, Speck, JS, DenBaars, SP & Nakamura, S 2013, 'Green semipolar (202̄1̄) InGaN light-emitting diodes with small wavelength shift and narrow spectral linewidth', Applied Physics Express, vol. 6, no. 6, 062102. https://doi.org/10.7567/APEX.6.062102
Zhao, Yuji ; Oh, Sang Ho ; Wu, Feng ; Kawaguchi, Yoshinobu ; Tanaka, Shinichi ; Fujito, Kenji ; Speck, James S. ; DenBaars, Steven P. ; Nakamura, Shuji. / Green semipolar (202̄1̄) InGaN light-emitting diodes with small wavelength shift and narrow spectral linewidth. In: Applied Physics Express. 2013 ; Vol. 6, No. 6.
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AU - Tanaka, Shinichi

AU - Fujito, Kenji

AU - Speck, James S.

AU - DenBaars, Steven P.

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