Joshua Scott, North Carolina State University
Ductility and Charge Transport in Polymer Semiconductor Blend Films
Written by Maria Torres Arango
Toward full implementation of thin film transistors from organic semiconductors, the mechanical properties of these rather brittle films should be improved. Joshua Scott from North Carolina State University is doing research to respond to this need, “To achieve these goals, we consider blending a rigid high-performance donor-acceptor polymer poly[4-(4,4-dihexadecyl-4H-cyclopenta[1,2-b:5,4-b’]dithiopen-2-yl)-alt-[1,2,5]thiadiazolo[3,4-c]pyridine] (PCDTPT) with ductile regioregular poly(3-hexylthiophene) (P3HT).” By doing these polymer blends, films with no crack evidence up to strains of 75% were obtained; this is significant since cracking of unblended PCDTPT occurs at around 10%. The microstructure of the films obtained holds the reasons for such improvement in the mechanical properties on the materials, while maintaining relatively similar electron mobility characteristics. With this exciting result and more room for improvement, one can imagine how much more the field of flexible thin film electronics will benefit from this research.