Organic light emitting illuminant, and device and method for the production thereof

A coating device for producing an organic light-emitting illuminant comprising mutually adjacent regions having in each case different emission colors, wherein each of the regions has the following construction:

• a substrate,
• a first electrode layer,
• a first charge carrier transport layer,
• at least one emission layer,
• a second charge carrier transport layer, and
• a second electrode layer,
• wherein the thicknesses of the first charge carrier transport layer, the emission layer and/or the second charge carrier transport layer differ in the mutually adjacent regions and are set in each case such that an optimum coupling-out for the light color emitted in the corresponding region can be achieved in each case,
• comprising a vacuum chamber, a device for linearly transporting a substrate, a plurality of coating sources and diaphragms for limiting the exposed substrate area when the substrate travels past the individual coating sources, wherein a diaphragm is in each case subdivided into a plurality of partial regions which are mutually adjacent in a direction transverse with respect to a substrate transport direction and which have different extents along the substrate transport direction or are in part completely closed, and extent of the partial regions is coordinated with one another such that when the substrate travels past the coating sources, on the substrate mutually adjacent regions having optimum layer thicknesses for coupling out light of the respective emission color are produced.