A Light Scattering Layer for Internal Light Extraction of Organic Light-Emitting Diodes Based on Silver Nanowires

Keunsoo Lee; Jin Wook Shin; Jun Hwan Park; Jonghee Lee; Chul Woong Joo; Jeong Ik Lee; Doo Hee Cho; Jong Tae Lim; Min Cheol Oh; Byeong Kwon Ju; Jaehyun Moon

doi:10.1021/acsami.6b02924

A Light Scattering Layer for Internal Light Extraction of Organic Light-Emitting Diodes Based on Silver Nanowires

Keunsoo Lee, Jin Wook Shin, Jun Hwan Park, Jonghee Lee, Chul Woong Joo, Jeong Ik Lee, Doo Hee Cho, Jong Tae Lim, Min Cheol Oh, Byeong Kwon Ju, Jaehyun Moon

School of Electrical Engineering

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

47 Citations (Scopus)

Abstract

We propose and fabricate a random light scattering layer for light extraction in organic light-emitting diodes (OLEDs) with silver nanodots, which were obtained by melting silver nanowires. The OLED with the light scattering layer as an internal light extraction structure was enhanced by 49.1% for the integrated external quantum efficiency (EQE). When a wrinkle structure is simultaneously used for an external light extraction structure, the total enhancement of the integrated EQE was 65.3%. The EQE is maximized to 65.3% at a current level of 2.0 mA/cm². By applying an internal light scattering layer and wrinkle structure to an OLED, the variance in the emission spectra was negligible over a broad viewing angle. Power mode analyses with finite difference time domain (FDTD) simulations revealed that the use of a scattering layer effectively reduced the waveguiding mode while introducing non-negligible absorption. Our method offers an effective yet simple approach to achieve both efficiency enhancement and spectral stability for a wide range of OLED applications.

Original language	English
Pages (from-to)	17409-17415
Number of pages	7
Journal	ACS Applied Materials and Interfaces
Volume	8
Issue number	27
DOIs	https://doi.org/10.1021/acsami.6b02924
Publication status	Published - 2016 Jul 13

Keywords

finite difference time domain
light extraction
organic light-emitting diodes
silver nanowires
wrinkle structures

ASJC Scopus subject areas

Materials Science(all)

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10.1021/acsami.6b02924

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title = "A Light Scattering Layer for Internal Light Extraction of Organic Light-Emitting Diodes Based on Silver Nanowires",

abstract = "We propose and fabricate a random light scattering layer for light extraction in organic light-emitting diodes (OLEDs) with silver nanodots, which were obtained by melting silver nanowires. The OLED with the light scattering layer as an internal light extraction structure was enhanced by 49.1% for the integrated external quantum efficiency (EQE). When a wrinkle structure is simultaneously used for an external light extraction structure, the total enhancement of the integrated EQE was 65.3%. The EQE is maximized to 65.3% at a current level of 2.0 mA/cm2. By applying an internal light scattering layer and wrinkle structure to an OLED, the variance in the emission spectra was negligible over a broad viewing angle. Power mode analyses with finite difference time domain (FDTD) simulations revealed that the use of a scattering layer effectively reduced the waveguiding mode while introducing non-negligible absorption. Our method offers an effective yet simple approach to achieve both efficiency enhancement and spectral stability for a wide range of OLED applications.",

keywords = "finite difference time domain, light extraction, organic light-emitting diodes, silver nanowires, wrinkle structures",

author = "Keunsoo Lee and Shin, {Jin Wook} and Park, {Jun Hwan} and Jonghee Lee and Joo, {Chul Woong} and Lee, {Jeong Ik} and Cho, {Doo Hee} and Lim, {Jong Tae} and Oh, {Min Cheol} and Ju, {Byeong Kwon} and Jaehyun Moon",

year = "2016",

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doi = "10.1021/acsami.6b02924",

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T1 - A Light Scattering Layer for Internal Light Extraction of Organic Light-Emitting Diodes Based on Silver Nanowires

AU - Lee, Keunsoo

AU - Shin, Jin Wook

AU - Park, Jun Hwan

AU - Lee, Jonghee

AU - Joo, Chul Woong

AU - Lee, Jeong Ik

AU - Cho, Doo Hee

AU - Lim, Jong Tae

AU - Oh, Min Cheol

AU - Ju, Byeong Kwon

AU - Moon, Jaehyun

PY - 2016/7/13

Y1 - 2016/7/13

N2 - We propose and fabricate a random light scattering layer for light extraction in organic light-emitting diodes (OLEDs) with silver nanodots, which were obtained by melting silver nanowires. The OLED with the light scattering layer as an internal light extraction structure was enhanced by 49.1% for the integrated external quantum efficiency (EQE). When a wrinkle structure is simultaneously used for an external light extraction structure, the total enhancement of the integrated EQE was 65.3%. The EQE is maximized to 65.3% at a current level of 2.0 mA/cm2. By applying an internal light scattering layer and wrinkle structure to an OLED, the variance in the emission spectra was negligible over a broad viewing angle. Power mode analyses with finite difference time domain (FDTD) simulations revealed that the use of a scattering layer effectively reduced the waveguiding mode while introducing non-negligible absorption. Our method offers an effective yet simple approach to achieve both efficiency enhancement and spectral stability for a wide range of OLED applications.

AB - We propose and fabricate a random light scattering layer for light extraction in organic light-emitting diodes (OLEDs) with silver nanodots, which were obtained by melting silver nanowires. The OLED with the light scattering layer as an internal light extraction structure was enhanced by 49.1% for the integrated external quantum efficiency (EQE). When a wrinkle structure is simultaneously used for an external light extraction structure, the total enhancement of the integrated EQE was 65.3%. The EQE is maximized to 65.3% at a current level of 2.0 mA/cm2. By applying an internal light scattering layer and wrinkle structure to an OLED, the variance in the emission spectra was negligible over a broad viewing angle. Power mode analyses with finite difference time domain (FDTD) simulations revealed that the use of a scattering layer effectively reduced the waveguiding mode while introducing non-negligible absorption. Our method offers an effective yet simple approach to achieve both efficiency enhancement and spectral stability for a wide range of OLED applications.

KW - finite difference time domain

KW - light extraction

KW - organic light-emitting diodes

KW - silver nanowires

KW - wrinkle structures

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A Light Scattering Layer for Internal Light Extraction of Organic Light-Emitting Diodes Based on Silver Nanowires

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