We Want Our Photons Back: Simple Nanostructures for White Organic Light-Emitting Diode Outcoupling

Yong Hyun Kim; Jonghee Lee; Won Mok Kim; Cornelius Fuchs; Simone Hofmann; Hong-Wei Chang; Malte C. Gather; Lars Mueller-Meskamp; Karl Leo

doi:10.1002/adfm.201303401

We Want Our Photons Back: Simple Nanostructures for White Organic Light-Emitting Diode Outcoupling

Yong Hyun Kim^*, Jonghee Lee, Won Mok Kim, Cornelius Fuchs, Simone Hofmann, Hong-Wei Chang, Malte C. Gather, Lars Mueller-Meskamp, Karl Leo

^*Corresponding author for this work

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

Abstract

Conventional planar organic light-emitting diodes (OLEDs) suffer from poor light extraction due to the total internal reflection at the waveguided interfaces. Therefore, the development of efficient light extraction structures is of great necessity and significance to realize practical applications in large area and cost-effective light sources. In this paper, a high-performance internal light outcoupling system for white OLEDs with spontaneously formed metal oxide nanostructures is developed. The fabrication process of the outcoupling system is simple and can be scaled to large area manufacturing. The enhancement of external quantum efficiency in white OLEDs comprising the outcoupling system reaches a factor of 1.7, and it is further increased to 2.9 when a hemispherical lens is employed. Together with the improvement of light extraction, excellent color stability over broad viewing angles is achieved.

Original language	English
Pages (from-to)	2553-2559
Number of pages	7
Journal	Advanced Functional Materials
Volume	24
Issue number	17
DOIs	https://doi.org/10.1002/adfm.201303401
Publication status	Published - May 2014

Keywords

organic light-emitting diodes
light extraction
color stability
conductive polymer electrodes
organic semiconductors
HIGH-EFFICIENCY
DEVICES
EXTRACTION
EMISSION

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10.1002/adfm.201303401

Cite this

@article{c87281531a2f4e2eb06d4af3deee6684,

title = "We Want Our Photons Back: Simple Nanostructures for White Organic Light-Emitting Diode Outcoupling",

abstract = "Conventional planar organic light-emitting diodes (OLEDs) suffer from poor light extraction due to the total internal reflection at the waveguided interfaces. Therefore, the development of efficient light extraction structures is of great necessity and significance to realize practical applications in large area and cost-effective light sources. In this paper, a high-performance internal light outcoupling system for white OLEDs with spontaneously formed metal oxide nanostructures is developed. The fabrication process of the outcoupling system is simple and can be scaled to large area manufacturing. The enhancement of external quantum efficiency in white OLEDs comprising the outcoupling system reaches a factor of 1.7, and it is further increased to 2.9 when a hemispherical lens is employed. Together with the improvement of light extraction, excellent color stability over broad viewing angles is achieved.",

keywords = "organic light-emitting diodes, light extraction, color stability, conductive polymer electrodes, organic semiconductors, HIGH-EFFICIENCY, DEVICES, EXTRACTION, EMISSION",

author = "Kim, {Yong Hyun} and Jonghee Lee and Kim, {Won Mok} and Cornelius Fuchs and Simone Hofmann and Hong-Wei Chang and Gather, {Malte C.} and Lars Mueller-Meskamp and Karl Leo",

year = "2014",

month = may,

doi = "10.1002/adfm.201303401",

language = "English",

volume = "24",

pages = "2553--2559",

journal = "Advanced Functional Materials",

issn = "1616-301X",

publisher = "John Wiley & Sons, Ltd",

number = "17",

}

TY - JOUR

T1 - We Want Our Photons Back: Simple Nanostructures for White Organic Light-Emitting Diode Outcoupling

AU - Kim, Yong Hyun

AU - Lee, Jonghee

AU - Kim, Won Mok

AU - Fuchs, Cornelius

AU - Hofmann, Simone

AU - Chang, Hong-Wei

AU - Gather, Malte C.

AU - Mueller-Meskamp, Lars

AU - Leo, Karl

PY - 2014/5

Y1 - 2014/5

N2 - Conventional planar organic light-emitting diodes (OLEDs) suffer from poor light extraction due to the total internal reflection at the waveguided interfaces. Therefore, the development of efficient light extraction structures is of great necessity and significance to realize practical applications in large area and cost-effective light sources. In this paper, a high-performance internal light outcoupling system for white OLEDs with spontaneously formed metal oxide nanostructures is developed. The fabrication process of the outcoupling system is simple and can be scaled to large area manufacturing. The enhancement of external quantum efficiency in white OLEDs comprising the outcoupling system reaches a factor of 1.7, and it is further increased to 2.9 when a hemispherical lens is employed. Together with the improvement of light extraction, excellent color stability over broad viewing angles is achieved.

AB - Conventional planar organic light-emitting diodes (OLEDs) suffer from poor light extraction due to the total internal reflection at the waveguided interfaces. Therefore, the development of efficient light extraction structures is of great necessity and significance to realize practical applications in large area and cost-effective light sources. In this paper, a high-performance internal light outcoupling system for white OLEDs with spontaneously formed metal oxide nanostructures is developed. The fabrication process of the outcoupling system is simple and can be scaled to large area manufacturing. The enhancement of external quantum efficiency in white OLEDs comprising the outcoupling system reaches a factor of 1.7, and it is further increased to 2.9 when a hemispherical lens is employed. Together with the improvement of light extraction, excellent color stability over broad viewing angles is achieved.

KW - organic light-emitting diodes

KW - light extraction

KW - color stability

KW - conductive polymer electrodes

KW - organic semiconductors

KW - HIGH-EFFICIENCY

KW - DEVICES

KW - EXTRACTION

KW - EMISSION

U2 - 10.1002/adfm.201303401

DO - 10.1002/adfm.201303401

M3 - Article

SN - 1616-301X

VL - 24

SP - 2553

EP - 2559

JO - Advanced Functional Materials

JF - Advanced Functional Materials

IS - 17

ER -

We Want Our Photons Back: Simple Nanostructures for White Organic Light-Emitting Diode Outcoupling

Abstract

Keywords

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