Prof. Jenekhe of Univ. of Washington in Seattle and Prof. Watson of Univ. of Kentucky in Lexington have developed a new ambipolar polymer that can perform faster in polymer circuit than those were made in the past. This type of polymer is a not a new one. However, researchers demonstrated the novelty in the speed at which charges move through a semiconductor by using a donor-acceptor type copolymer. The promise is a possible faster printable circuits.
Ref: F.S. Kim, X. Guo, M.D. Watson, & S.A. Jenekhe: Advanced Materials, Published online August 11, 2009