Light Extraction Enhancement in Flexible Organic Light-Emitting Diodes by a Light-Scattering Layer of Dewetted Ag Nanoparticles at Low Temperatures

Junhee Choi; Seonju Kim; Cheol Hwee Park; Jin Ho Kwack; Chan Hyuk Park; Ha Hwang; Hyeong Seop Im; Young Wook Park; Byeong Kwon Ju

doi:10.1021/acsami.8b07026

Light Extraction Enhancement in Flexible Organic Light-Emitting Diodes by a Light-Scattering Layer of Dewetted Ag Nanoparticles at Low Temperatures

Junhee Choi
, Seonju Kim
, Cheol Hwee Park
, Jin Ho Kwack
, Chan Hyuk Park
, Ha Hwang
, Hyeong Seop Im
, Young Wook Park^*
, Byeong Kwon Ju

^*Corresponding author for this work

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

39 Citations (Scopus)

Abstract

We demonstrated light extraction improvement by applying a scattering layer of Ag nanoparticles physically synthesized through a low-temperature annealing process to flexible organic light-emitting diodes (OLEDs). In general, increasing the size of Ag nanoparticles is preferred to increase light scattering, but a high-temperature annealing process (∼400 °C) is required to produce them. However, flexible substrates generally cannot withstand high-temperature processes. In this study, we formed Ag nanoparticles at a low temperature of ∼200 °C by inserting a poly(3,4-ethylenedioxythiophene) polystyrene sulfonate buffer layer, thus promoting Ag dewetting. As a result, the scattering layer of enlarged Ag nanoparticles formed at low temperatures increased the external quantum efficiency by 24% in a flexible OLED compared to a reference device.

Original language	English
Pages (from-to)	32373-32379
Number of pages	7
Journal	ACS Applied Materials and Interfaces
Volume	10
Issue number	38
DOIs	https://doi.org/10.1021/acsami.8b07026
Publication status	Published - 2018 Sept 26
Externally published	Yes

Bibliographical note

Funding Information:
This research was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea Government (MSIP) (no. 2016R1A2B4014073) and the Ministry of Education (no. NRF-2017R1D1A1B03036520), and the Industry Technology R&D program (10048317, Development of red and blue OLEDs with EQE over 20% using delayed fluorescent materials) funded by MOTIE/KEIT.

Publisher Copyright:
© 2018 American Chemical Society.

Keywords

light extraction
light scattering
metal nanoparticles
organic light-emitting diodes (OLEDs)
plasmonics

ASJC Scopus subject areas

General Materials Science

Access to Document

10.1021/acsami.8b07026

Cite this

@article{36ce8122806a46f993bdd6ea75019ee3,

title = "Light Extraction Enhancement in Flexible Organic Light-Emitting Diodes by a Light-Scattering Layer of Dewetted Ag Nanoparticles at Low Temperatures",

abstract = "We demonstrated light extraction improvement by applying a scattering layer of Ag nanoparticles physically synthesized through a low-temperature annealing process to flexible organic light-emitting diodes (OLEDs). In general, increasing the size of Ag nanoparticles is preferred to increase light scattering, but a high-temperature annealing process (∼400 °C) is required to produce them. However, flexible substrates generally cannot withstand high-temperature processes. In this study, we formed Ag nanoparticles at a low temperature of ∼200 °C by inserting a poly(3,4-ethylenedioxythiophene) polystyrene sulfonate buffer layer, thus promoting Ag dewetting. As a result, the scattering layer of enlarged Ag nanoparticles formed at low temperatures increased the external quantum efficiency by 24\% in a flexible OLED compared to a reference device.",

keywords = "light extraction, light scattering, metal nanoparticles, organic light-emitting diodes (OLEDs), plasmonics",

author = "Junhee Choi and Seonju Kim and Park, \{Cheol Hwee\} and Kwack, \{Jin Ho\} and Park, \{Chan Hyuk\} and Ha Hwang and Im, \{Hyeong Seop\} and Park, \{Young Wook\} and Ju, \{Byeong Kwon\}",

note = "Funding Information: This research was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea Government (MSIP) (no. 2016R1A2B4014073) and the Ministry of Education (no. NRF-2017R1D1A1B03036520), and the Industry Technology R\&D program (10048317, Development of red and blue OLEDs with EQE over 20\% using delayed fluorescent materials) funded by MOTIE/KEIT. Publisher Copyright: {\textcopyright} 2018 American Chemical Society.",

year = "2018",

month = sep,

day = "26",

doi = "10.1021/acsami.8b07026",

language = "English",

volume = "10",

pages = "32373--32379",

journal = "ACS Applied Materials and Interfaces",

issn = "1944-8244",

publisher = "American Chemical Society",

number = "38",

}

TY - JOUR

T1 - Light Extraction Enhancement in Flexible Organic Light-Emitting Diodes by a Light-Scattering Layer of Dewetted Ag Nanoparticles at Low Temperatures

AU - Choi, Junhee

AU - Kim, Seonju

AU - Park, Cheol Hwee

AU - Kwack, Jin Ho

AU - Park, Chan Hyuk

AU - Hwang, Ha

AU - Im, Hyeong Seop

AU - Park, Young Wook

AU - Ju, Byeong Kwon

N1 - Funding Information: This research was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea Government (MSIP) (no. 2016R1A2B4014073) and the Ministry of Education (no. NRF-2017R1D1A1B03036520), and the Industry Technology R&D program (10048317, Development of red and blue OLEDs with EQE over 20% using delayed fluorescent materials) funded by MOTIE/KEIT. Publisher Copyright: © 2018 American Chemical Society.

PY - 2018/9/26

Y1 - 2018/9/26

N2 - We demonstrated light extraction improvement by applying a scattering layer of Ag nanoparticles physically synthesized through a low-temperature annealing process to flexible organic light-emitting diodes (OLEDs). In general, increasing the size of Ag nanoparticles is preferred to increase light scattering, but a high-temperature annealing process (∼400 °C) is required to produce them. However, flexible substrates generally cannot withstand high-temperature processes. In this study, we formed Ag nanoparticles at a low temperature of ∼200 °C by inserting a poly(3,4-ethylenedioxythiophene) polystyrene sulfonate buffer layer, thus promoting Ag dewetting. As a result, the scattering layer of enlarged Ag nanoparticles formed at low temperatures increased the external quantum efficiency by 24% in a flexible OLED compared to a reference device.

AB - We demonstrated light extraction improvement by applying a scattering layer of Ag nanoparticles physically synthesized through a low-temperature annealing process to flexible organic light-emitting diodes (OLEDs). In general, increasing the size of Ag nanoparticles is preferred to increase light scattering, but a high-temperature annealing process (∼400 °C) is required to produce them. However, flexible substrates generally cannot withstand high-temperature processes. In this study, we formed Ag nanoparticles at a low temperature of ∼200 °C by inserting a poly(3,4-ethylenedioxythiophene) polystyrene sulfonate buffer layer, thus promoting Ag dewetting. As a result, the scattering layer of enlarged Ag nanoparticles formed at low temperatures increased the external quantum efficiency by 24% in a flexible OLED compared to a reference device.

KW - light extraction

KW - light scattering

KW - metal nanoparticles

KW - organic light-emitting diodes (OLEDs)

KW - plasmonics

UR - https://www.scopus.com/pages/publications/85053630898

U2 - 10.1021/acsami.8b07026

DO - 10.1021/acsami.8b07026

M3 - Article

C2 - 30216036

AN - SCOPUS:85053630898

SN - 1944-8244

VL - 10

SP - 32373

EP - 32379

JO - ACS Applied Materials and Interfaces

JF - ACS Applied Materials and Interfaces

IS - 38

ER -

Light Extraction Enhancement in Flexible Organic Light-Emitting Diodes by a Light-Scattering Layer of Dewetted Ag Nanoparticles at Low Temperatures

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Cite this