title: Cross-linked Polymer-Blend Gate Dielectrics through Thermal Click Chemistry.
abstract: New cross-linking reagents were synthesized and mixed with polystyrene (PS) in solution to form a blend. Thin-films were spin-coated from the blend and then cross-linked by thermal activation at relatively low temperature (100 °C) to form cross-linked gate dielectrics. This new method is compatible with plastic substrates in flexible electronics. The azide and alkyne cross-linking reagents are kinetically stable at room temperature, so any premature cross-linking is avoided during processing. This method also significantly improved the dielectric performances of PS thin films. Solution-processed top-gate organic field-effect transistor devices with indacenodithiophene-benzothiadiazole copolymer as semiconductor layer and the cross-linked PS blend as dielectric layer showed improved performances with lower gate leakages and higher operation stabilities than devices with neat PS film as dielectric layer.
authors.affiliation: Shanghai Key Lab of Polymer and Electrical Insulation, Department of Polymer Science and Engineering, School of Chemistry and Chemical Engineering, Shanghai JiaoTong University, Shanghai 200240 (China).
authors.forename: Shengxia
authors.initials: S
authors.lastname: Li
authors.affiliation: National Engineering Laboratory of TFT-LCD Materials and Technologies, Department of Electronic Engineering, Shanghai JiaoTong University, Shanghai 200240 (China).
authors.forename: Wei
authors.initials: W
authors.lastname: Tang
authors.affiliation: College of Chemistry and Chemical Engineering, Guangxi University for Nationalities, Nanning 530006 (China).
authors.forename: Weimin
authors.initials: W
authors.lastname: Zhang
authors.affiliation: National Engineering Laboratory of TFT-LCD Materials and Technologies, Department of Electronic Engineering, Shanghai JiaoTong University, Shanghai 200240 (China). x.guo@sjtu.edu.cn.
authors.forename: Xiaojun
authors.initials: X
authors.lastname: Guo
authors.affiliation: Shanghai Key Lab of Polymer and Electrical Insulation, Department of Polymer Science and Engineering, School of Chemistry and Chemical Engineering, Shanghai JiaoTong University, Shanghai 200240 (China). qz14@sjtu.edu.cn.
authors.forename: Qing
authors.initials: Q
authors.lastname: Zhang
keywords: click chemistry; cross-linking agents; device fabrication; dielectrics; polymer blends