Tetrabranched Photo-Crosslinker Enables Micrometer-Scale Patterning of Light-Emitting Super Yellow for High-Resolution OLEDs

Wooik Jang; Myeongjae Lee; Hyukmin Kweon; Hye Won Park; Jeehye Yang; Seunghan Kim; Hyunwoo Jo; Chaeyoung Lee; Jeong Ho Cho; Kyungwon Kwak; Do Hwan Kim; Bong Soo Kim; Moon Sung Kang

doi:10.1021/acsphotonics.1c00768

Tetrabranched Photo-Crosslinker Enables Micrometer-Scale Patterning of Light-Emitting Super Yellow for High-Resolution OLEDs

Wooik Jang, Myeongjae Lee, Hyukmin Kweon, Hye Won Park, Jeehye Yang, Seunghan Kim, Hyunwoo Jo, Chaeyoung Lee, Jeong Ho Cho, Kyungwon Kwak, Do Hwan Kim, Bong Soo Kim, Moon Sung Kang

Department of Chemistry

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

4 Citations (Scopus)

Abstract

Development of a simple and effective patterning method applicable to solution-processable organic luminophores over a large area is critical for the cost-effective production of organic light-emitting-diode (OLED) displays. Here, we demonstrate high-resolution patterning of light-emitting polymer active layers using a highly efficient photo-crosslinker (4Bx). The photo-crosslinker is structured in a tetrabranched geometry, wherein a photo-crosslinkable azide moiety is present at each of the four corners of the molecule, and each of these moieties can form a chemical bond with light-emitting polymer semiconductors under UV irradiation. Due to the high crosslinking efficiency of 4Bx, the use of an unprecedentedly small amount of 4Bx (0.1 wt %) allows fully crosslinking light-emitting Super Yellow polymers without degrading their photoluminescence and electroluminescence characteristics. Furthermore, precisely defined photo-crosslinked patterns of Super Yellow with feature sizes of 5 μm are formed by using p-xylene as the developing solvent that was carefully selected according to a Hansen solubility parameter analysis.

Original language	English
Pages (from-to)	2519-2528
Number of pages	10
Journal	ACS Photonics
Volume	8
Issue number	8
DOIs	https://doi.org/10.1021/acsphotonics.1c00768
Publication status	Published - 2021 Aug 18

Keywords

azide
high-resolution organic light-emitting diodes
light-emitting polymer semiconductors
photopatterning
tetrabranched photo-crosslinker

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Biotechnology
Atomic and Molecular Physics, and Optics
Electrical and Electronic Engineering

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10.1021/acsphotonics.1c00768

Cite this

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title = "Tetrabranched Photo-Crosslinker Enables Micrometer-Scale Patterning of Light-Emitting Super Yellow for High-Resolution OLEDs",

abstract = "Development of a simple and effective patterning method applicable to solution-processable organic luminophores over a large area is critical for the cost-effective production of organic light-emitting-diode (OLED) displays. Here, we demonstrate high-resolution patterning of light-emitting polymer active layers using a highly efficient photo-crosslinker (4Bx). The photo-crosslinker is structured in a tetrabranched geometry, wherein a photo-crosslinkable azide moiety is present at each of the four corners of the molecule, and each of these moieties can form a chemical bond with light-emitting polymer semiconductors under UV irradiation. Due to the high crosslinking efficiency of 4Bx, the use of an unprecedentedly small amount of 4Bx (0.1 wt %) allows fully crosslinking light-emitting Super Yellow polymers without degrading their photoluminescence and electroluminescence characteristics. Furthermore, precisely defined photo-crosslinked patterns of Super Yellow with feature sizes of 5 μm are formed by using p-xylene as the developing solvent that was carefully selected according to a Hansen solubility parameter analysis.",

keywords = "azide, high-resolution organic light-emitting diodes, light-emitting polymer semiconductors, photopatterning, tetrabranched photo-crosslinker",

author = "Wooik Jang and Myeongjae Lee and Hyukmin Kweon and Park, {Hye Won} and Jeehye Yang and Seunghan Kim and Hyunwoo Jo and Chaeyoung Lee and Cho, {Jeong Ho} and Kyungwon Kwak and Kim, {Do Hwan} and Kim, {Bong Soo} and Kang, {Moon Sung}",

note = "Funding Information: The manuscript was written through contributions of all authors. All authors have given approval to the final version of the manuscript. This work was supported by the Samsung Research Funding & Incubation Center of Samsung Electronics under Project Number SRFC-MA1901-05. Publisher Copyright: {\textcopyright} 2021 American Chemical Society.",

year = "2021",

month = aug,

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doi = "10.1021/acsphotonics.1c00768",

language = "English",

volume = "8",

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journal = "ACS Photonics",

issn = "2330-4022",

publisher = "American Chemical Society",

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T1 - Tetrabranched Photo-Crosslinker Enables Micrometer-Scale Patterning of Light-Emitting Super Yellow for High-Resolution OLEDs

AU - Jang, Wooik

AU - Lee, Myeongjae

AU - Kweon, Hyukmin

AU - Park, Hye Won

AU - Yang, Jeehye

AU - Kim, Seunghan

AU - Jo, Hyunwoo

AU - Lee, Chaeyoung

AU - Cho, Jeong Ho

AU - Kwak, Kyungwon

AU - Kim, Do Hwan

AU - Kim, Bong Soo

AU - Kang, Moon Sung

N1 - Funding Information: The manuscript was written through contributions of all authors. All authors have given approval to the final version of the manuscript. This work was supported by the Samsung Research Funding & Incubation Center of Samsung Electronics under Project Number SRFC-MA1901-05. Publisher Copyright: © 2021 American Chemical Society.

PY - 2021/8/18

Y1 - 2021/8/18

N2 - Development of a simple and effective patterning method applicable to solution-processable organic luminophores over a large area is critical for the cost-effective production of organic light-emitting-diode (OLED) displays. Here, we demonstrate high-resolution patterning of light-emitting polymer active layers using a highly efficient photo-crosslinker (4Bx). The photo-crosslinker is structured in a tetrabranched geometry, wherein a photo-crosslinkable azide moiety is present at each of the four corners of the molecule, and each of these moieties can form a chemical bond with light-emitting polymer semiconductors under UV irradiation. Due to the high crosslinking efficiency of 4Bx, the use of an unprecedentedly small amount of 4Bx (0.1 wt %) allows fully crosslinking light-emitting Super Yellow polymers without degrading their photoluminescence and electroluminescence characteristics. Furthermore, precisely defined photo-crosslinked patterns of Super Yellow with feature sizes of 5 μm are formed by using p-xylene as the developing solvent that was carefully selected according to a Hansen solubility parameter analysis.

AB - Development of a simple and effective patterning method applicable to solution-processable organic luminophores over a large area is critical for the cost-effective production of organic light-emitting-diode (OLED) displays. Here, we demonstrate high-resolution patterning of light-emitting polymer active layers using a highly efficient photo-crosslinker (4Bx). The photo-crosslinker is structured in a tetrabranched geometry, wherein a photo-crosslinkable azide moiety is present at each of the four corners of the molecule, and each of these moieties can form a chemical bond with light-emitting polymer semiconductors under UV irradiation. Due to the high crosslinking efficiency of 4Bx, the use of an unprecedentedly small amount of 4Bx (0.1 wt %) allows fully crosslinking light-emitting Super Yellow polymers without degrading their photoluminescence and electroluminescence characteristics. Furthermore, precisely defined photo-crosslinked patterns of Super Yellow with feature sizes of 5 μm are formed by using p-xylene as the developing solvent that was carefully selected according to a Hansen solubility parameter analysis.

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KW - light-emitting polymer semiconductors

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ER -

Tetrabranched Photo-Crosslinker Enables Micrometer-Scale Patterning of Light-Emitting Super Yellow for High-Resolution OLEDs

Abstract

Keywords

ASJC Scopus subject areas

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