Backbone Tuning of Diketopyrrolopyrrole-Based Copolymer Semiconductors for High-Performance Thin Film Transistors
발표자
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초록
내용
Electrical properties of diketopyrrolopyrrole donor−acceptor copolymer semiconductors are tuned via controlling the backbone building blocks with thiophene and/or selenophene moieties connect to vinylene groups, and these conjugated structures related to the charge-transport behaviors are systematically studied. We synthesize 29DPP-based copolymer derivatives with vinylene linkage between thiophene-thiophene, selenophene- selenophene units, respectively. Among the solution-processed semiconducting films, 29DPP-TVT film-based transistors show the highest charge-carrier mobility values of up to 11.1 cm2V-1s-1 without any hysteresis. To determine the fine molecular tuning-dependent electrical properties of these semiconducting polymers, morphological and grazing-incidence X-ray diffraction are performed on the cast films. Also, via blending of these semiconducting polymers and deformable polymers, we can demonstrate the stretchable TFTs.