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

doi:10.7567/APEX.6.062102

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 journal › Article › peer-review

86 Scopus citations

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 language	English (US)
Article number	062102
Journal	Applied Physics Express
Volume	6
Issue number	6
DOIs	https://doi.org/10.7567/APEX.6.062102
State	Published - Jun 2013
Externally published	Yes

ASJC Scopus subject areas

General Engineering
General Physics and Astronomy

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@article{1a041308dca049b9b7e0148ebf84f986,

title = "Green semipolar (20{\=2}{\=1}) InGaN light-emitting diodes with small wavelength shift and narrow spectral linewidth",

abstract = "We study the optical spectral properties for green semipolar (20{\=2}{\=1}) and (20{\=2}1) light-emitting diode (LED) with same indium compositions. Compared to (20{\=2}1) devices, the fabricated (20{\=2}{\=1}) 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 (20{\=2}{\=1}) 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 (20{\=2}{\=1}) and (20{\=2}1) LEDs were also discussed. The green (20{\=2}{\=1}) LED showed smaller wavelength shift and narrower FWHM than green LEDs fabricated on other planes.",

author = "Yuji Zhao and Oh, {Sang Ho} and Feng Wu and Yoshinobu Kawaguchi and Shinichi Tanaka and Kenji Fujito and Speck, {James S.} and DenBaars, {Steven P.} and Shuji Nakamura",

year = "2013",

month = jun,

doi = "10.7567/APEX.6.062102",

language = "English (US)",

volume = "6",

journal = "Applied Physics Express",

issn = "1882-0778",

publisher = "Japan Society of Applied Physics",

number = "6",

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T1 - Green semipolar (202̄1̄) InGaN light-emitting diodes with small wavelength shift and narrow spectral linewidth

AU - Zhao, Yuji

AU - Oh, Sang Ho

AU - Wu, Feng

AU - Kawaguchi, Yoshinobu

AU - Tanaka, Shinichi

AU - Fujito, Kenji

AU - Speck, James S.

AU - DenBaars, Steven P.

AU - Nakamura, Shuji

PY - 2013/6

Y1 - 2013/6

N2 - 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.

AB - 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.

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

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