Conductive polymer

Conjugated polymers (English Conductive Polymers, conductive polymers ), organic macromolecules that contain conjugated double bonds. The double bonds are arranged such that they alternate in each case a single bond. The polymers are composed of exactly juxtaposed light emitting subunits chromophore ( color carriers) can be mentioned. Between Chromopheren there is an interaction. By the structure and size, these organic molecules have properties of a semiconductor. Conjugated polymers are an evolution of luminous plastics used in OLEDs.

History

The first discovered conjugated polymer is poly ( p-phenylenevinylene) (PPV). This is the first material made ​​from the OLEDs., The emission maximum of PPV is in the range 551-520 nm (green). Other examples are polypyrrole ( PPy ), polyfluorene (PF) and polythiophene ( PT).

Benefits

Compared to conventional semiconductors, conjugated polymers have the advantage that they can be easily produced and that it is possible to produce large and at the same time flexible devices (eg, luminous surfaces, roll-up screens ). Furthermore, they have a high efficiency in terms of light efficiency and may cover the entire visible spectrum.