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Diazo-6Bx, a Six-Branched Diazo Cross-Linker, Enables High-Fidelity Patterning for Solution-Processed Electronics
Hyobin Ham1, In Cheol Kwak2, Daeyeon Lee1
1Department of Chemistry, Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Republic of Korea.
ACS Nano
|June 6, 2026
Summary
A novel diazo-based cross-linker, Diazo-6Bx, enhances photopatterning for solution-processed electronics. This material enables high-fidelity patterning and improved performance in organic thin-film transistors (OTFTs).
Area of Science:
- Materials Science
- Organic Electronics
- Photochemistry
Background:
- Direct photopatterning is crucial for fabricating integrated, solution-processed electronics.
- Photoactivated cross-linkers are key components in achieving high-resolution patterns.
Purpose of the Study:
- To introduce and evaluate Diazo-6Bx, a novel six-branched diazo-based cross-linker.
- To compare Diazo-6Bx with existing azide-based cross-linkers for photopatterning applications.
Main Methods:
- Synthesis and characterization of Diazo-6Bx.
- Comparative photopatterning studies with Ph-6Bx and 6Bx.
- Fabrication and testing of organic thin-film transistors (OTFTs) using Diazo-6Bx.
Main Results:
- Diazo-6Bx exhibits high miscibility with organic semiconductors and efficient C-H insertion reactivity.
- Fluorine-free Diazo-6Bx enables uniform cross-linking, leading to high-fidelity photopatterning with steep taper angles and minimal line-width variation.
- OTFTs fabricated with Diazo-6Bx show superior performance, stability, and scalability compared to those using 6Bx.
Conclusions:
- Careful design of cross-linkers is critical for achieving high-fidelity patterning of next-generation electronic materials.
- Diazo-6Bx represents a significant advancement in cross-linker technology for solution-processed electronics.
- The developed cross-linker facilitates the creation of high-resolution transistor arrays and logic circuits with enhanced operational stability.
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