Enhanced light out-coupling in OLED employing thermal-assisted, self-aggregated silver nano particles

Hyung Jun Song; Jongseok Han; Gunhee Lee; Jiho Sohn; Yongwon Kwon; Mansoo Choi; Changhee Lee

doi:10.1016/j.orgel.2017.10.025

Enhanced light out-coupling in OLED employing thermal-assisted, self-aggregated silver nano particles

Hyung Jun Song, Jongseok Han, Gunhee Lee, Jiho Sohn, Yongwon Kwon, Mansoo Choi, Changhee Lee

Dept. of Safety Engineering

Seoul National University

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

30 Scopus citations

Abstract

Metallic nano-structures in micro-cavity organic light emitting diode (OLED) can significantly enhance light out-coupling efficiency. Nevertheless, they are not widely accepted in conventional devices due to its complicated process and increased manufacturing cost. In this study, we demonstrate a production-ready alternative for increasing the efficiency of OLEDs by implementing thermal-assisted self-aggregated metallic nanoparticles (NPs). Silver NPs are fabricated by thermal annealing of vacuum deposited thin silver layer without any complicated process, which is easily scalable in large area with low cost. Theoretical calculation and dark field microscopy image indicate that these stochastic Ag NPs provide light scattering in broad range. By incorporating Ag NPs to OLED with micro-cavity structure, 11% improvement in the external quantum efficiency was obtained without deteriorating viewing angle.

Original language	English
Pages (from-to)	230-236
Number of pages	7
Journal	Organic Electronics
Volume	52
DOIs	https://doi.org/10.1016/j.orgel.2017.10.025
State	Published - Jan 2018

Keywords

External quantum efficiency
Light scattering
Nanoparticle
Organic light emitting diodes (OLEDs)
Waveguide mode

UN SDGs

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

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10.1016/j.orgel.2017.10.025

Cite this

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title = "Enhanced light out-coupling in OLED employing thermal-assisted, self-aggregated silver nano particles",

abstract = "Metallic nano-structures in micro-cavity organic light emitting diode (OLED) can significantly enhance light out-coupling efficiency. Nevertheless, they are not widely accepted in conventional devices due to its complicated process and increased manufacturing cost. In this study, we demonstrate a production-ready alternative for increasing the efficiency of OLEDs by implementing thermal-assisted self-aggregated metallic nanoparticles (NPs). Silver NPs are fabricated by thermal annealing of vacuum deposited thin silver layer without any complicated process, which is easily scalable in large area with low cost. Theoretical calculation and dark field microscopy image indicate that these stochastic Ag NPs provide light scattering in broad range. By incorporating Ag NPs to OLED with micro-cavity structure, 11\% improvement in the external quantum efficiency was obtained without deteriorating viewing angle.",

keywords = "External quantum efficiency, Light scattering, Nanoparticle, Organic light emitting diodes (OLEDs), Waveguide mode",

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doi = "10.1016/j.orgel.2017.10.025",

language = "English",

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T1 - Enhanced light out-coupling in OLED employing thermal-assisted, self-aggregated silver nano particles

AU - Song, Hyung Jun

AU - Han, Jongseok

AU - Lee, Gunhee

AU - Sohn, Jiho

AU - Kwon, Yongwon

AU - Choi, Mansoo

AU - Lee, Changhee

PY - 2018/1

Y1 - 2018/1

N2 - Metallic nano-structures in micro-cavity organic light emitting diode (OLED) can significantly enhance light out-coupling efficiency. Nevertheless, they are not widely accepted in conventional devices due to its complicated process and increased manufacturing cost. In this study, we demonstrate a production-ready alternative for increasing the efficiency of OLEDs by implementing thermal-assisted self-aggregated metallic nanoparticles (NPs). Silver NPs are fabricated by thermal annealing of vacuum deposited thin silver layer without any complicated process, which is easily scalable in large area with low cost. Theoretical calculation and dark field microscopy image indicate that these stochastic Ag NPs provide light scattering in broad range. By incorporating Ag NPs to OLED with micro-cavity structure, 11% improvement in the external quantum efficiency was obtained without deteriorating viewing angle.

AB - Metallic nano-structures in micro-cavity organic light emitting diode (OLED) can significantly enhance light out-coupling efficiency. Nevertheless, they are not widely accepted in conventional devices due to its complicated process and increased manufacturing cost. In this study, we demonstrate a production-ready alternative for increasing the efficiency of OLEDs by implementing thermal-assisted self-aggregated metallic nanoparticles (NPs). Silver NPs are fabricated by thermal annealing of vacuum deposited thin silver layer without any complicated process, which is easily scalable in large area with low cost. Theoretical calculation and dark field microscopy image indicate that these stochastic Ag NPs provide light scattering in broad range. By incorporating Ag NPs to OLED with micro-cavity structure, 11% improvement in the external quantum efficiency was obtained without deteriorating viewing angle.

KW - External quantum efficiency

KW - Light scattering

KW - Nanoparticle

KW - Organic light emitting diodes (OLEDs)

KW - Waveguide mode

UR - http://www.scopus.com/inward/record.url?scp=85032268348&partnerID=8YFLogxK

U2 - 10.1016/j.orgel.2017.10.025

DO - 10.1016/j.orgel.2017.10.025

M3 - Article

AN - SCOPUS:85032268348

SN - 1566-1199

VL - 52

SP - 230

EP - 236

JO - Organic Electronics

JF - Organic Electronics

ER -

Enhanced light out-coupling in OLED employing thermal-assisted, self-aggregated silver nano particles

Abstract

Keywords

UN SDGs

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