Polymers and Polymer Blends for New Opto- and Bio-electronic Devices
발표자
Antonio Facchetti (Georgia Institute of Technology/Northwestern University)
연구책임자
Antonio Facchetti (Georgia Institute of Technology/Northwestern University)
초록
내용
We investigated the phase behaviors of block copolymer blends composed of the polystyrene-b-poly(n-butyl methacrylate) (PS-b-PnBMA) and polystyrene-b-poly(n-hexyl methacrylate) (PS-b-PnHMA), using small-angle neutron scattering (SANS), small-angle X-ray scattering (SAXS), and depolarized light scattering (DPLS). A miscible phase between the PnBMA and PnHMA blocks in the BCP blends allows the various composition-dependent phase behaviors. Intriguingly, a closed-loop phase transition was found in nearly symmetric composition of the miscible PS-b-PnBMA/PS-b-PnHMA blends from lower disorder-to-order transition (LDOT) to order-to-disorder transition (ODT) behaviors with increasing amount of PS-b-PnHMA. In this presentation we report the development of novel polymeric materials for use as single components or in blends with small molecule or polymer for applications in three major areas. 1. Realization of new mechanically ductile and ultra-stretchable organic solar cells. Here, ductility of the photoactive blend is improved by the design of a family of molecular acceptors having a trialkylsilys group. 2. New mixed ionic-electronic conductors particularly n-type based on naphthalene diimide (NDI) and diketopyrrolopyrrole (DPP) units. 3. We discuss recent implementation of a new n-type polymer for the realization of high-performance and balanced complementary electrochemical OECTs and inverters, which are then used to fabricate neuromorphic circuits capable of sensing, transducing and recording information.