Improved emission efficiency of a-plane GaN light emitting diodes with silica nano-spheres integrated into a-plane GaN buffer layer

S. H. Park; J. Park; D. J. You; K. Joo; D. Moon; J. Jang; D. U. Kim; H. Chang; S. Moon; Y. K. Song; G. D. Lee; H. Jeon; J. Xu; Y. Nanishi; E. Yoon

doi:10.1063/1.4716472

Improved emission efficiency of a-plane GaN light emitting diodes with silica nano-spheres integrated into a-plane GaN buffer layer

S. H. Park, J. Park, D. J. You, K. Joo, D. Moon, J. Jang, D. U. Kim, H. Chang, S. Moon, Y. K. Song, G. D. Lee, H. Jeon, J. Xu, Y. Nanishi, E. Yoon

Mechanical Engineering

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7 Scopus citations

Abstract

A simple and inexpensive technique to improve the emission efficiency of nonpolar a-plane light emitting diodes (LEDs) is proposed. The 3-dimensional growth nature of a-plane GaN was utilized to form the regrowth template of a-plane GaN. Subsequently, the controlled integration of silica nano-spheres (CIS) into the regrowth template is performed to improve the crystal quality of a-plane GaN by epitaxial lateral overgrowth method. In addition, the CIS improves light extraction by the scattering process. The light output power from the CIS a-plane GaN LEDs showed 130-150 increase compared to that of LED without silica nano-spheres.

Original language	English (US)
Article number	191116
Journal	Applied Physics Letters
Volume	100
Issue number	19
DOIs	https://doi.org/10.1063/1.4716472
State	Published - May 7 2012

Bibliographical note

Funding Information:
This work was supported by the Brain Korea 21 (BK21) program, World Class University (WCU) program (R31-2008-000-10075-0) of the Ministry of Education of Korea, and the Technology Innovation Program (Industrial Strategic technology development program, 10035430, Development of high efficiency light emitting diode for illumination) funded by the Ministry of Knowledge Economy (MKE, Korea).

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Park, S. H., Park, J., You, D. J., Joo, K., Moon, D., Jang, J., Kim, D. U., Chang, H., Moon, S., Song, Y. K., Lee, G. D., Jeon, H., Xu, J., Nanishi, Y., & Yoon, E. (2012). Improved emission efficiency of a-plane GaN light emitting diodes with silica nano-spheres integrated into a-plane GaN buffer layer. Applied Physics Letters, 100(19), Article 191116. https://doi.org/10.1063/1.4716472

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title = "Improved emission efficiency of a-plane GaN light emitting diodes with silica nano-spheres integrated into a-plane GaN buffer layer",

abstract = "A simple and inexpensive technique to improve the emission efficiency of nonpolar a-plane light emitting diodes (LEDs) is proposed. The 3-dimensional growth nature of a-plane GaN was utilized to form the regrowth template of a-plane GaN. Subsequently, the controlled integration of silica nano-spheres (CIS) into the regrowth template is performed to improve the crystal quality of a-plane GaN by epitaxial lateral overgrowth method. In addition, the CIS improves light extraction by the scattering process. The light output power from the CIS a-plane GaN LEDs showed 130-150 increase compared to that of LED without silica nano-spheres.",

author = "Park, {S. H.} and J. Park and You, {D. J.} and K. Joo and D. Moon and J. Jang and Kim, {D. U.} and H. Chang and S. Moon and Song, {Y. K.} and Lee, {G. D.} and H. Jeon and J. Xu and Y. Nanishi and E. Yoon",

note = "Funding Information: This work was supported by the Brain Korea 21 (BK21) program, World Class University (WCU) program (R31-2008-000-10075-0) of the Ministry of Education of Korea, and the Technology Innovation Program (Industrial Strategic technology development program, 10035430, Development of high efficiency light emitting diode for illumination) funded by the Ministry of Knowledge Economy (MKE, Korea).",

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doi = "10.1063/1.4716472",

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AU - Park, S. H.

AU - Park, J.

AU - You, D. J.

AU - Joo, K.

AU - Moon, D.

AU - Jang, J.

AU - Kim, D. U.

AU - Chang, H.

AU - Moon, S.

AU - Song, Y. K.

AU - Lee, G. D.

AU - Jeon, H.

AU - Xu, J.

AU - Nanishi, Y.

AU - Yoon, E.

N1 - Funding Information: This work was supported by the Brain Korea 21 (BK21) program, World Class University (WCU) program (R31-2008-000-10075-0) of the Ministry of Education of Korea, and the Technology Innovation Program (Industrial Strategic technology development program, 10035430, Development of high efficiency light emitting diode for illumination) funded by the Ministry of Knowledge Economy (MKE, Korea).

PY - 2012/5/7

Y1 - 2012/5/7

N2 - A simple and inexpensive technique to improve the emission efficiency of nonpolar a-plane light emitting diodes (LEDs) is proposed. The 3-dimensional growth nature of a-plane GaN was utilized to form the regrowth template of a-plane GaN. Subsequently, the controlled integration of silica nano-spheres (CIS) into the regrowth template is performed to improve the crystal quality of a-plane GaN by epitaxial lateral overgrowth method. In addition, the CIS improves light extraction by the scattering process. The light output power from the CIS a-plane GaN LEDs showed 130-150 increase compared to that of LED without silica nano-spheres.

AB - A simple and inexpensive technique to improve the emission efficiency of nonpolar a-plane light emitting diodes (LEDs) is proposed. The 3-dimensional growth nature of a-plane GaN was utilized to form the regrowth template of a-plane GaN. Subsequently, the controlled integration of silica nano-spheres (CIS) into the regrowth template is performed to improve the crystal quality of a-plane GaN by epitaxial lateral overgrowth method. In addition, the CIS improves light extraction by the scattering process. The light output power from the CIS a-plane GaN LEDs showed 130-150 increase compared to that of LED without silica nano-spheres.

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Improved emission efficiency of a-plane GaN light emitting diodes with silica nano-spheres integrated into a-plane GaN buffer layer

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