GaN-based light-emitting diodes with step graded-refractive index (ZnO x(SiO2)1-x micropillar array

Hung Ming Chang, Ya Yu Yang, Wei Chi Lai, Shuguang Li, Yu Ruh Lin, Zhi Yong Jiao, Shoou Jinn Chang

研究成果: Article

摘要

Step graded-refractive index (SGRI) (ZnO)x(SiO2) 1-x micropillar multilayers have been introduced and demonstrated on GaN-based LEDs combined with the mesh ITO. The SGRI (ZnO)x(SiO 2)1-x micropillars were produced by controlling the Zn/Zn+Si ratio of co-sputtered ZnO and SiO2. The introduced three-layered SGRI (ZnO)x(SiO2)1-x micropillars improved both critical angle inside GaN LEDs and Fresnel transmittance coefficient (ηFr) as well as had better light coupling into the micropillars. Moreover, a high number of layers of the SGRI micropillars would aid the light coupled in the pillars to escape from the side wall of the pillar. LEDs with three-layered SGRI (ZnO)x(SiO2)1-x micropillars exhibited output power enhancements of 12.2% with a 20 mA V f of 3.19 V. The output power of the mesh ITO LEDs with SGRI (ZnO)x(SiO2)1-x micropillars was further enhanced to 15.3% by improving the current spreading.

原文English
文章編號6308728
頁(從 - 到)353-358
頁數6
期刊IEEE/OSA Journal of Display Technology
9
發行號5
DOIs
出版狀態Published - 2013 一月 1

指紋

Light emitting diodes
Refractive index
light emitting diodes
refractivity
ITO (semiconductors)
mesh
output
escape
transmittance
Multilayers
augmentation
coefficients

All Science Journal Classification (ASJC) codes

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

引用此文

Chang, Hung Ming ; Yang, Ya Yu ; Lai, Wei Chi ; Li, Shuguang ; Lin, Yu Ruh ; Jiao, Zhi Yong ; Chang, Shoou Jinn. / GaN-based light-emitting diodes with step graded-refractive index (ZnO x(SiO2)1-x micropillar array. 於: IEEE/OSA Journal of Display Technology. 2013 ; 卷 9, 編號 5. 頁 353-358.
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abstract = "Step graded-refractive index (SGRI) (ZnO)x(SiO2) 1-x micropillar multilayers have been introduced and demonstrated on GaN-based LEDs combined with the mesh ITO. The SGRI (ZnO)x(SiO 2)1-x micropillars were produced by controlling the Zn/Zn+Si ratio of co-sputtered ZnO and SiO2. The introduced three-layered SGRI (ZnO)x(SiO2)1-x micropillars improved both critical angle inside GaN LEDs and Fresnel transmittance coefficient (ηFr) as well as had better light coupling into the micropillars. Moreover, a high number of layers of the SGRI micropillars would aid the light coupled in the pillars to escape from the side wall of the pillar. LEDs with three-layered SGRI (ZnO)x(SiO2)1-x micropillars exhibited output power enhancements of 12.2{\%} with a 20 mA V f of 3.19 V. The output power of the mesh ITO LEDs with SGRI (ZnO)x(SiO2)1-x micropillars was further enhanced to 15.3{\%} by improving the current spreading.",
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GaN-based light-emitting diodes with step graded-refractive index (ZnO x(SiO2)1-x micropillar array. / Chang, Hung Ming; Yang, Ya Yu; Lai, Wei Chi; Li, Shuguang; Lin, Yu Ruh; Jiao, Zhi Yong; Chang, Shoou Jinn.

於: IEEE/OSA Journal of Display Technology, 卷 9, 編號 5, 6308728, 01.01.2013, p. 353-358.

研究成果: Article

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AU - Lai, Wei Chi

AU - Li, Shuguang

AU - Lin, Yu Ruh

AU - Jiao, Zhi Yong

AU - Chang, Shoou Jinn

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