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Published on: April 14, 2023
Photo-crosslinkable diazirine additives for direct photolithography of PEDOT:PSS
Mingyuan Sun1, Rui-Lin Chai1, Songhao Li1
1State Key Laboratory of Advanced Materials for Intelligent Sensing, Key Laboratory of Organic Integrated Circuit, Ministry of Education & Tianjin Key Laboratory of Molecular Optoelectronic Sciences, Department of Chemistry, School of Science, Tianjin University, Tianjin 300072, P. R. China. yx_wang@tju.edu.cn.
Abstract:
A diazirine-based crosslinker enables the direct photolithography of PEDOT:PSS at a low loading (1 : 10 mass ratio). UV exposure yields robust covalent carbene-insertion networks that survive water development, achieving high-fidelity features with resolutions below 20 µm. Subsequent acid post-treatment affords highly ordered polymer networks with an exceptional film conductivity of 2258 S cm-1.
