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Cited 2 time in webofscience Cited 2 time in scopus
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Tetrabranched Photo-Crosslinker Enables Micrometer-Scale Patterning of Light-Emitting Super Yellow for High-Resolution OLEDs

Authors
Jang, WooikLee, MyeongjaeKweon, HyukminPark, Hye WonYang, JeehyeKim, SeunghanJo, HyunwooLee, ChaeyoungCho, Jeong HoKwak, KyungwonKim, Do HwanKim, BongSooKang, Moon Sung
Issue Date
Aug-2021
Publisher
AMER CHEMICAL SOC
Keywords
photopatterning; light-emitting polymer semiconductors; tetrabranched photo-crosslinker; azide; high-resolution organic light-emitting diodes
Citation
ACS Photonics, v.8, no.8, pp.2519 - 2528
Indexed
SCIE
SCOPUS
Journal Title
ACS Photonics
Volume
8
Number
8
Start Page
2519
End Page
2528
URI
https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/141335
DOI
10.1021/acsphotonics.1c00768
ISSN
2330-4022
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 mu m 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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