Light extraction efficiency enhancement of III-nitride light-emitting diodes by using 2-D close-packed TiO2 microsphere arrays

Xiao Hang Li; Peifen Zhu; Guangyu Liu; Jing Zhang; Renbo Song; Yik Khoon Ee; Pisist Kumnorkaew; James F. Gilchrist; Nelson Tansu

doi:10.1109/JDT.2013.2246541

Light extraction efficiency enhancement of III-nitride light-emitting diodes by using 2-D close-packed TiO₂ microsphere arrays

Xiao Hang Li^*, Peifen Zhu, Guangyu Liu, Jing Zhang, Renbo Song, Yik Khoon Ee, Pisist Kumnorkaew, James F. Gilchrist, Nelson Tansu

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

88 Scopus citations

Abstract

The enhancement of light extraction efficiency of InGaN quantum well light emitting diodes (LEDs) was achieved by employing the refractive index matched TiO₂ microsphere arrays. The optimization studies of the dipping method and rapid convective deposition (RCD) method were carried out for the deposition of TiO₂ microsphere arrays onto LEDs. The two-dimensional (2D) close-packed TiO₂ microsphere arrays were deposited by the using optimized conditions of the dipping and RCD methods, respectively. The light extraction efficiencies of LEDs under electrical injection were enhanced by 1.8-1.9 times by utilizing 520-nm diameter amorphous and anatase TiO₂ microspheres via the two deposition methods.

Original language	English (US)
Article number	6476034
Pages (from-to)	324-332
Number of pages	9
Journal	IEEE/OSA Journal of Display Technology
Volume	9
Issue number	5
DOIs	https://doi.org/10.1109/JDT.2013.2246541
State	Published - 2013
Externally published	Yes

Keywords

III-Nitride
TiO microspheres
light extraction efficiency
light-emitting diodes
refractive index matching

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Electrical and Electronic Engineering

Access to Document

10.1109/JDT.2013.2246541

Cite this

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title = "Light extraction efficiency enhancement of III-nitride light-emitting diodes by using 2-D close-packed TiO2 microsphere arrays",

abstract = "The enhancement of light extraction efficiency of InGaN quantum well light emitting diodes (LEDs) was achieved by employing the refractive index matched TiO2 microsphere arrays. The optimization studies of the dipping method and rapid convective deposition (RCD) method were carried out for the deposition of TiO2 microsphere arrays onto LEDs. The two-dimensional (2D) close-packed TiO2 microsphere arrays were deposited by the using optimized conditions of the dipping and RCD methods, respectively. The light extraction efficiencies of LEDs under electrical injection were enhanced by 1.8-1.9 times by utilizing 520-nm diameter amorphous and anatase TiO2 microspheres via the two deposition methods.",

keywords = "III-Nitride, TiO microspheres, light extraction efficiency, light-emitting diodes, refractive index matching",

author = "Li, {Xiao Hang} and Peifen Zhu and Guangyu Liu and Jing Zhang and Renbo Song and Ee, {Yik Khoon} and Pisist Kumnorkaew and Gilchrist, {James F.} and Nelson Tansu",

year = "2013",

doi = "10.1109/JDT.2013.2246541",

language = "English (US)",

volume = "9",

pages = "324--332",

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publisher = "IEEE Computer Society",

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TY - JOUR

T1 - Light extraction efficiency enhancement of III-nitride light-emitting diodes by using 2-D close-packed TiO2 microsphere arrays

AU - Li, Xiao Hang

AU - Zhu, Peifen

AU - Liu, Guangyu

AU - Zhang, Jing

AU - Song, Renbo

AU - Ee, Yik Khoon

AU - Kumnorkaew, Pisist

AU - Gilchrist, James F.

AU - Tansu, Nelson

PY - 2013

Y1 - 2013

N2 - The enhancement of light extraction efficiency of InGaN quantum well light emitting diodes (LEDs) was achieved by employing the refractive index matched TiO2 microsphere arrays. The optimization studies of the dipping method and rapid convective deposition (RCD) method were carried out for the deposition of TiO2 microsphere arrays onto LEDs. The two-dimensional (2D) close-packed TiO2 microsphere arrays were deposited by the using optimized conditions of the dipping and RCD methods, respectively. The light extraction efficiencies of LEDs under electrical injection were enhanced by 1.8-1.9 times by utilizing 520-nm diameter amorphous and anatase TiO2 microspheres via the two deposition methods.

AB - The enhancement of light extraction efficiency of InGaN quantum well light emitting diodes (LEDs) was achieved by employing the refractive index matched TiO2 microsphere arrays. The optimization studies of the dipping method and rapid convective deposition (RCD) method were carried out for the deposition of TiO2 microsphere arrays onto LEDs. The two-dimensional (2D) close-packed TiO2 microsphere arrays were deposited by the using optimized conditions of the dipping and RCD methods, respectively. The light extraction efficiencies of LEDs under electrical injection were enhanced by 1.8-1.9 times by utilizing 520-nm diameter amorphous and anatase TiO2 microspheres via the two deposition methods.

KW - III-Nitride

KW - TiO microspheres

KW - light extraction efficiency

KW - light-emitting diodes

KW - refractive index matching

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