The 2.5-years €11 million R2Flex project recently concluded. The project, which aimed to develop new technologies for efficient and affordable flexible OLEDs manufactured using a roll-to-roll (R2R) process, presented a flexible OLED desk luminaire prototype. It uses two OLED lighting panels, produced at COMEDD and serially connected via flexible contacting.
The flexible OLED panel was produced on a metal foil. Metal was chosen because it is a cost-effective substrate as one of the key goals in the project was lowering the production cost of OLEDs.
As part of the project, the Fraunhofer COMEDD improved its R2R research line and developed new patterning and encapsulation technologies. They say that they also established new technology that can transfer OLED processes from rigid substrates to roll-to-roll processes.
The main challenge in this project was to develop deposition technology of complex OLED structures. Performing this process within a roll-to-roll line was a complex task, but it was concluded successfully. Tridonic Dresden evaluated technologies for the secure and cost-efficient electrical contacting of flexible OLED on metal substrates and their integration in luminaries. The task of contacting through the barrier film was solved together with Fraunhofer COMEDD.