Perpustakaan Digital ITB

This paper describes the design, synthesis, andoptical and electronic properties of two conjugated polymersCPIZ-BandCPIZ-Tthat incorporate closed-shell cations intotheir conjugated backbones, balanced by anionic pendantgroups. The zwitterionic nature of the polymers renders themsoluble in and processable from polar, protic solvents to formsemiconductingfilms that are not doped. These uniqueproperties are confirmed by absorption and electron para-magnetic resonance spectroscopy. The energies of theunoccupied states respond to the tritylium moieties in theconjugated backbone, while the occupied states respond to theelectron-donating ability of the uncharged, aromatic units inthe backbone. Films cast from 80:20 HCOOH/H2Obyvolume show good electron mobilities, enabling a photovoltaic effect in proof-of-concept, bilayer solar cells.