Conjugated polymers
Conjugated polymers are organic macromolecules that contain conjugated double bonds throughout their backbone (see right). The extensive π-electron system gives such organic molecules semiconductor properties . By doping it with charge carriers are conductive polymers .
They are used, among other things, in OLEDs , organic solar cells and printable electrical circuits.
history
The first conjugated polymer discovered was poly ( p -phenylenevinylene) (PPV) in 1968 . The electroluminescence of a polymeric material was first discovered on it in 1990 , and it was subsequently the first material from which OLEDs were made. Further examples are polypyrrole (PPy), polyfluoren (PF) and polythiophene (PT).
advantages
Compared to conventional semiconductors, conjugated polymers have the advantage that they can be produced easily and that it is possible to produce large and at the same time flexible components (e.g. luminous surfaces, screens that can be rolled up).
Individual evidence
- ↑ Wichard JD Beenken: Conjugated Polymers - a short introduction ( Memento from July 11, 2007 in the Internet Archive ), TU Ilmenau .
Web links
- Relationship between the electronic structure and the material properties ( Memento from June 11, 2007 in the Internet Archive )