Enhanced Light Extraction from Organic Light-Emitting Diodes with Micro-Nano Hybrid Structure

Eun Jeong Bae; Shin Woo Kang; Geun Su Choi; Eun Bi Jang; Dong Hyun Baek; Byeong Kwon Ju; Young Wook Park

doi:10.3390/nano12081266

Enhanced Light Extraction from Organic Light-Emitting Diodes with Micro-Nano Hybrid Structure

Eun Jeong Bae, Shin Woo Kang, Geun Su Choi, Eun Bi Jang, Dong Hyun Baek, Byeong Kwon Ju, Young Wook Park

School of Electrical Engineering

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

3 Citations (Scopus)

Abstract

In this study, an external light extraction layer with a micro-nano hybrid structure was applied to improve the external light extraction efficiency of organic light-emitting diodes (OLEDs). A reactive ion-etching (RIE) process, using O2 and CHF3 plasma, was performed on the surface of the micro-scale pattern to form micro-nano hybrid structures. According to the results of this study, the nanostructures formed by the treatment of O2 and CHF3 were different, and the efficiency according to the structures was analyzed experimentally and theoretically. As a result, the OLED, to which the micro-nano hybrid structure, manufactured through a simple process, is applied, improved the external light extraction efficiency by up to 38%, and an extended viewing angle profile was obtained. Additionally, an effective method for enhancing the out-coupling efficiency of OLEDs was presented by optimizing the micro-nano hybrid structure according to process conditions.

Original language	English
Article number	1266
Journal	Nanomaterials
Volume	12
Issue number	8
DOIs	https://doi.org/10.3390/nano12081266
Publication status	Published - 2022 Apr 1

Keywords

light extraction
mico-nano hybrid structure
organic light-emitting diodes
reactive ion etching

ASJC Scopus subject areas

Chemical Engineering(all)
Materials Science(all)

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10.3390/nano12081266

Cite this

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title = "Enhanced Light Extraction from Organic Light-Emitting Diodes with Micro-Nano Hybrid Structure",

abstract = "In this study, an external light extraction layer with a micro-nano hybrid structure was applied to improve the external light extraction efficiency of organic light-emitting diodes (OLEDs). A reactive ion-etching (RIE) process, using O2 and CHF3 plasma, was performed on the surface of the micro-scale pattern to form micro-nano hybrid structures. According to the results of this study, the nanostructures formed by the treatment of O2 and CHF3 were different, and the efficiency according to the structures was analyzed experimentally and theoretically. As a result, the OLED, to which the micro-nano hybrid structure, manufactured through a simple process, is applied, improved the external light extraction efficiency by up to 38%, and an extended viewing angle profile was obtained. Additionally, an effective method for enhancing the out-coupling efficiency of OLEDs was presented by optimizing the micro-nano hybrid structure according to process conditions.",

keywords = "light extraction, mico-nano hybrid structure, organic light-emitting diodes, reactive ion etching",

author = "Bae, {Eun Jeong} and Kang, {Shin Woo} and Choi, {Geun Su} and Jang, {Eun Bi} and Baek, {Dong Hyun} and Ju, {Byeong Kwon} and Park, {Young Wook}",

note = "Funding Information: Funding: This research was funded by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIT) (No. 2020R1C1C1013567), National Research Foundation of Korea (NRF) funded by the Ministry of Education (MOE) (2021RIS-004). Funding Information: Acknowledgments: This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIT) and supported by the “Regional Innovation Strategy (RIS)” through the National Research Foundation of Korea (NRF) funded by the Ministry of Education (MOE). We are thankful for the analysis support of the Center for Next Generation Semiconductor Technology at SUNMOON University. Publisher Copyright: {\textcopyright} 2022 by the authors. Licensee MDPI, Basel, Switzerland.",

year = "2022",

month = apr,

day = "1",

doi = "10.3390/nano12081266",

language = "English",

volume = "12",

journal = "Nanomaterials",

issn = "2079-4991",

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T1 - Enhanced Light Extraction from Organic Light-Emitting Diodes with Micro-Nano Hybrid Structure

AU - Bae, Eun Jeong

AU - Kang, Shin Woo

AU - Choi, Geun Su

AU - Jang, Eun Bi

AU - Baek, Dong Hyun

AU - Ju, Byeong Kwon

AU - Park, Young Wook

N1 - Funding Information: Funding: This research was funded by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIT) (No. 2020R1C1C1013567), National Research Foundation of Korea (NRF) funded by the Ministry of Education (MOE) (2021RIS-004). Funding Information: Acknowledgments: This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIT) and supported by the “Regional Innovation Strategy (RIS)” through the National Research Foundation of Korea (NRF) funded by the Ministry of Education (MOE). We are thankful for the analysis support of the Center for Next Generation Semiconductor Technology at SUNMOON University. Publisher Copyright: © 2022 by the authors. Licensee MDPI, Basel, Switzerland.

PY - 2022/4/1

Y1 - 2022/4/1

N2 - In this study, an external light extraction layer with a micro-nano hybrid structure was applied to improve the external light extraction efficiency of organic light-emitting diodes (OLEDs). A reactive ion-etching (RIE) process, using O2 and CHF3 plasma, was performed on the surface of the micro-scale pattern to form micro-nano hybrid structures. According to the results of this study, the nanostructures formed by the treatment of O2 and CHF3 were different, and the efficiency according to the structures was analyzed experimentally and theoretically. As a result, the OLED, to which the micro-nano hybrid structure, manufactured through a simple process, is applied, improved the external light extraction efficiency by up to 38%, and an extended viewing angle profile was obtained. Additionally, an effective method for enhancing the out-coupling efficiency of OLEDs was presented by optimizing the micro-nano hybrid structure according to process conditions.

AB - In this study, an external light extraction layer with a micro-nano hybrid structure was applied to improve the external light extraction efficiency of organic light-emitting diodes (OLEDs). A reactive ion-etching (RIE) process, using O2 and CHF3 plasma, was performed on the surface of the micro-scale pattern to form micro-nano hybrid structures. According to the results of this study, the nanostructures formed by the treatment of O2 and CHF3 were different, and the efficiency according to the structures was analyzed experimentally and theoretically. As a result, the OLED, to which the micro-nano hybrid structure, manufactured through a simple process, is applied, improved the external light extraction efficiency by up to 38%, and an extended viewing angle profile was obtained. Additionally, an effective method for enhancing the out-coupling efficiency of OLEDs was presented by optimizing the micro-nano hybrid structure according to process conditions.

KW - light extraction

KW - mico-nano hybrid structure

KW - organic light-emitting diodes

KW - reactive ion etching

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ER -

Enhanced Light Extraction from Organic Light-Emitting Diodes with Micro-Nano Hybrid Structure

Abstract

Keywords

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