Abstract
Polymeric light emitting devices may be fabricated from a simple structure consisting of a low work function cathode (typically calcium or magnesium), a conjugated semiconducting polymer and a transparent anode (typically indium-tin oxide). Optimum device efficiencies require the balanced injection of electrons and holes. This paper describes the application of molecular engineering in the design of a family of poly(cyanoterephthalylidenene)s which show increased electron affinity over the unsubstituted analogue [poly(p-phenylenevinylene) PPV]. In particular these polymers as the emissive layer in a bilayer device with indium tin oxide (ITO, positive transparent contact) and aluminum (stable negative contact) and PPV as a hole transporting layer exhibit internal efficiencies up to 4%.
Original language | English (US) |
---|---|
Title of host publication | Materials Research Society Symposium Proceedings |
Publisher | Publ by Materials Research SocietyPittsburgh, PA, United States |
ISBN (Print) | 1558992278 |
State | Published - Jan 1 1994 |
Externally published | Yes |