Corrugated structure through a spin-coating process for enhanced light extraction from organic light-emitting diodes

Woo Jin Hyun; Sang Hyuk Im; O. Ok Park; Byung Doo Chin

doi:10.1016/j.orgel.2012.01.001

Corrugated structure through a spin-coating process for enhanced light extraction from organic light-emitting diodes

Woo Jin Hyun, Sang Hyuk Im, O. Ok Park, Byung Doo Chin

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

24 Citations (Scopus)

Abstract

We have demonstrated a simple fabrication method for an out-coupling structure to enhance light extraction from organic light-emitting diodes (OLEDs). Spin-coating of SiO₂ and TiO_x sol mixture solution develops corrugated film. The structural evolution of the corrugation was explained by the localization of surface tension during the solvent evaporation. The structural parameters of the corrugated structure were characterized by varying the spin-coating speed and the mixing ratio of the solution. Compared to conventional devices, OLEDs with a corrugated structure at the backside of the glass substrate showed increased external quantum efficiency without change in the electroluminescence spectrum. The light extraction enhancement is attributed to the decreased incidence angle at the interface of glass substrate and air.

Original language	English
Pages (from-to)	579-585
Number of pages	7
Journal	Organic Electronics
Volume	13
Issue number	4
DOIs	https://doi.org/10.1016/j.orgel.2012.01.001
Publication status	Published - 2012 Apr
Externally published	Yes

Keywords

Corrugated structure
Light extraction
Organic light-emitting diodes
Out-coupling structure
Striation

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Biomaterials
Chemistry(all)
Condensed Matter Physics
Materials Chemistry
Electrical and Electronic Engineering

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10.1016/j.orgel.2012.01.001

Cite this

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title = "Corrugated structure through a spin-coating process for enhanced light extraction from organic light-emitting diodes",

abstract = "We have demonstrated a simple fabrication method for an out-coupling structure to enhance light extraction from organic light-emitting diodes (OLEDs). Spin-coating of SiO2 and TiOx sol mixture solution develops corrugated film. The structural evolution of the corrugation was explained by the localization of surface tension during the solvent evaporation. The structural parameters of the corrugated structure were characterized by varying the spin-coating speed and the mixing ratio of the solution. Compared to conventional devices, OLEDs with a corrugated structure at the backside of the glass substrate showed increased external quantum efficiency without change in the electroluminescence spectrum. The light extraction enhancement is attributed to the decreased incidence angle at the interface of glass substrate and air.",

keywords = "Corrugated structure, Light extraction, Organic light-emitting diodes, Out-coupling structure, Striation",

author = "Hyun, {Woo Jin} and Im, {Sang Hyuk} and Park, {O. Ok} and Chin, {Byung Doo}",

note = "Funding Information: This research was supported by the Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education, Science and Technology (CAFDC- 20100009894 and 2010-0010039 ).",

year = "2012",

month = apr,

doi = "10.1016/j.orgel.2012.01.001",

language = "English",

volume = "13",

pages = "579--585",

journal = "Organic Electronics: physics, materials, applications",

issn = "1566-1199",

publisher = "Elsevier",

number = "4",

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T1 - Corrugated structure through a spin-coating process for enhanced light extraction from organic light-emitting diodes

AU - Hyun, Woo Jin

AU - Im, Sang Hyuk

AU - Park, O. Ok

AU - Chin, Byung Doo

N1 - Funding Information: This research was supported by the Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education, Science and Technology (CAFDC- 20100009894 and 2010-0010039 ).

PY - 2012/4

Y1 - 2012/4

N2 - We have demonstrated a simple fabrication method for an out-coupling structure to enhance light extraction from organic light-emitting diodes (OLEDs). Spin-coating of SiO2 and TiOx sol mixture solution develops corrugated film. The structural evolution of the corrugation was explained by the localization of surface tension during the solvent evaporation. The structural parameters of the corrugated structure were characterized by varying the spin-coating speed and the mixing ratio of the solution. Compared to conventional devices, OLEDs with a corrugated structure at the backside of the glass substrate showed increased external quantum efficiency without change in the electroluminescence spectrum. The light extraction enhancement is attributed to the decreased incidence angle at the interface of glass substrate and air.

AB - We have demonstrated a simple fabrication method for an out-coupling structure to enhance light extraction from organic light-emitting diodes (OLEDs). Spin-coating of SiO2 and TiOx sol mixture solution develops corrugated film. The structural evolution of the corrugation was explained by the localization of surface tension during the solvent evaporation. The structural parameters of the corrugated structure were characterized by varying the spin-coating speed and the mixing ratio of the solution. Compared to conventional devices, OLEDs with a corrugated structure at the backside of the glass substrate showed increased external quantum efficiency without change in the electroluminescence spectrum. The light extraction enhancement is attributed to the decreased incidence angle at the interface of glass substrate and air.

KW - Corrugated structure

KW - Light extraction

KW - Organic light-emitting diodes

KW - Out-coupling structure

KW - Striation

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U2 - 10.1016/j.orgel.2012.01.001

DO - 10.1016/j.orgel.2012.01.001

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VL - 13

SP - 579

EP - 585

JO - Organic Electronics: physics, materials, applications

JF - Organic Electronics: physics, materials, applications

SN - 1566-1199

IS - 4

ER -

Corrugated structure through a spin-coating process for enhanced light extraction from organic light-emitting diodes

Abstract

Keywords

ASJC Scopus subject areas

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