Controlled Photocrosslinker Length for Conjugated Polymer-based Stretchable Transistors
발표자
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초록
내용
Stretchable transistors that use intrinsically deformable semiconducting conjugated polymers (CPs) as active layers are emerging as the next-generation key of electronics technology. A photo-initiated crosslinking approach has been reported with nitrene chemistry of azide-incorporated molecular additive to impart high deformability to a semiconducting polymer. In this study, we elaborately investigated the complicated effects of azide photo-crosslinker’s molecular length on various physicochemical characteristics and the resultant deformability of photo-crosslinked conjugated polymer films. By using benchmark near-amorphous conjugated polymer, IDTBT, we found that the length of ethylene glycol unit in the crosslinker affects the deformability of crosslinked IDTBT films, and the improvement is achieved not with semi-crystalline conjugated polymers but only with near-amorphous polymers. Based on the systematic studies, we suggest that crosslinking density in an amorphous regime is significant in the improvement of thin-film deformability.