Challenges for ultra-thin and highly flexible OLEDs fabricated by roll to roll process

Flexible OLEDs have been fabricated using fully R2R process and influence of fabrication conditions on the OLEDs performance has been studied. Issues for the R2R process and evaluation techniques are presented. Notably, mechanical stress liability of flexible OLEDs has been evaluated, simulated and designed. Trials for realizing mechanically reliable devices, fabrications of ultra-thin OLEDs using R2R process have been demonstrated.