Novaled is demonstrating OLEDs made on metal (steel) substrates that are only 0.7mm thick. Those substrates require specific top-emitting OLED structures, and Novaled has developed dedicated ITO-free OLEDs that has a similar performance to standard bottom-emission OLEDs. Novaled is also working on thin-film encapsulation that will enable flexible OLEDs.
Novaled say that metal substrates has several advantages: they will enable flexibility, they have good heat conduction properties, and the "open the roadmap" towards low-cost roll-to-roll production. They also look great and are very robust.