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New possibilities for light-emitting plastics with patterned light

The precise thickness of ultra-thin films of light-emitting plastics is important for their brightness. By layering two plastic films on top of each other, and writing in one of the films with a sharp stylus, light-emitting patterns like for example a signature can be created. Mattias Lindh, who has studied the operation of light-emitting electrochemical cells, writes this in his PhD thesis.