Enhanced light extraction of light-emitting diodes via nano-honeycomb photonic crystals

Po Han Fu; Guan Jhong Lin; Hsin Ping Wang; Kun Yu Lai; Jr Hau He

doi:10.1016/j.nanoen.2014.05.006

Enhanced light extraction of light-emitting diodes via nano-honeycomb photonic crystals

Po Han Fu, Guan Jhong Lin, Hsin Ping Wang, Kun Yu Lai^*, Jr Hau He

^*Corresponding author for this work

Electrical and Computer Engineering

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

25 Scopus citations

Abstract

We present an effective light extraction scheme for GaN-based multi-quantum-well (MQW) light emitting diodes with periodic SiO₂ nano-honeycomb arrays fabricated by natural lithography and reactive ion etching. The nano-honeycombs significantly boost light output by providing additional light extraction channels, not only guiding the internal modes into air but also alleviating the sever droop effect at high input power. At the driving current of 400mA, light output power through the nano-honeycombs is 77.8% higher than that of the bare device. In addition, the output power is particularly enhanced at the diffraction angle around 65°, which is attributed to the intensive first order diffraction on the honeycombs. Simulations based on finite-difference time-domain method are also carried out to reveal the field distribution across device interfaces.

Original language	English (US)
Pages (from-to)	78-83
Number of pages	6
Journal	Nano Energy
Volume	8
DOIs	https://doi.org/10.1016/j.nanoen.2014.05.006
State	Published - Sep 2014

Keywords

Light emitting diodes
Light extraction
Multiple quantum wells
Nanosphere lithography
Photonic crystals

ASJC Scopus subject areas

Renewable Energy, Sustainability and the Environment
General Materials Science
Electrical and Electronic Engineering

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1016/j.nanoen.2014.05.006

Cite this

@article{caa45237971541b895347bc3000d2174,

title = "Enhanced light extraction of light-emitting diodes via nano-honeycomb photonic crystals",

abstract = "We present an effective light extraction scheme for GaN-based multi-quantum-well (MQW) light emitting diodes with periodic SiO2 nano-honeycomb arrays fabricated by natural lithography and reactive ion etching. The nano-honeycombs significantly boost light output by providing additional light extraction channels, not only guiding the internal modes into air but also alleviating the sever droop effect at high input power. At the driving current of 400mA, light output power through the nano-honeycombs is 77.8% higher than that of the bare device. In addition, the output power is particularly enhanced at the diffraction angle around 65°, which is attributed to the intensive first order diffraction on the honeycombs. Simulations based on finite-difference time-domain method are also carried out to reveal the field distribution across device interfaces.",

keywords = "Light emitting diodes, Light extraction, Multiple quantum wells, Nanosphere lithography, Photonic crystals",

author = "Fu, {Po Han} and Lin, {Guan Jhong} and Wang, {Hsin Ping} and Lai, {Kun Yu} and He, {Jr Hau}",

year = "2014",

month = sep,

doi = "10.1016/j.nanoen.2014.05.006",

language = "English (US)",

volume = "8",

pages = "78--83",

journal = "Nano Energy",

issn = "2211-2855",

publisher = "Elsevier B.V.",

}

TY - JOUR

T1 - Enhanced light extraction of light-emitting diodes via nano-honeycomb photonic crystals

AU - Fu, Po Han

AU - Lin, Guan Jhong

AU - Wang, Hsin Ping

AU - Lai, Kun Yu

AU - He, Jr Hau

PY - 2014/9

Y1 - 2014/9

N2 - We present an effective light extraction scheme for GaN-based multi-quantum-well (MQW) light emitting diodes with periodic SiO2 nano-honeycomb arrays fabricated by natural lithography and reactive ion etching. The nano-honeycombs significantly boost light output by providing additional light extraction channels, not only guiding the internal modes into air but also alleviating the sever droop effect at high input power. At the driving current of 400mA, light output power through the nano-honeycombs is 77.8% higher than that of the bare device. In addition, the output power is particularly enhanced at the diffraction angle around 65°, which is attributed to the intensive first order diffraction on the honeycombs. Simulations based on finite-difference time-domain method are also carried out to reveal the field distribution across device interfaces.

AB - We present an effective light extraction scheme for GaN-based multi-quantum-well (MQW) light emitting diodes with periodic SiO2 nano-honeycomb arrays fabricated by natural lithography and reactive ion etching. The nano-honeycombs significantly boost light output by providing additional light extraction channels, not only guiding the internal modes into air but also alleviating the sever droop effect at high input power. At the driving current of 400mA, light output power through the nano-honeycombs is 77.8% higher than that of the bare device. In addition, the output power is particularly enhanced at the diffraction angle around 65°, which is attributed to the intensive first order diffraction on the honeycombs. Simulations based on finite-difference time-domain method are also carried out to reveal the field distribution across device interfaces.

KW - Light emitting diodes

KW - Light extraction

KW - Multiple quantum wells

KW - Nanosphere lithography

KW - Photonic crystals

UR - http://www.scopus.com/inward/record.url?scp=84904703003&partnerID=8YFLogxK

U2 - 10.1016/j.nanoen.2014.05.006

DO - 10.1016/j.nanoen.2014.05.006

M3 - Article

AN - SCOPUS:84904703003

SN - 2211-2855

VL - 8

SP - 78

EP - 83

JO - Nano Energy

JF - Nano Energy

ER -

Enhanced light extraction of light-emitting diodes via nano-honeycomb photonic crystals

Abstract

Keywords

ASJC Scopus subject areas

UN SDGs

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