| 20090078312 | VERFAHREN ZUR HERSTELLUNG VON MIT RYLENTETRACARBONSAEUREDIIMIDEN BESCHICHTETEN SUBSTRATEN - The present invention relates to a process for producing a substrate coated with rylenetetracarboximides, in which a substrate is treated with an N,N′-bisubstituted rylenetetracarboximide and the treated substrate is heated to a temperature at which the N,N′-bisubstituted rylenetetracarboximide is converted to the corresponding N,N′-unsubstituted compound. The present invention further relates to semiconductor units, organic solar cells, excitonic solar cells and organic light-emitting diodes which comprise a substrate produced by this process. The present invention further relates to a process for preparing N,N′-unsubstituted rylenetetracarboximides, in which the corresponding N,N′-bisubstituted rylenetetracarboximides are provided and heated to a temperature at which these compounds are converted to the corresponding N,N′-unsubstituted compounds. | 03-26-2009 |
