Abstract
Solution processed, chromaticity stable, and highly efficient flexible white organic light-emitting diode (FWOLED) based on a polyethylene naphthalate (PEN) substrate has been developed for the next-generation solid-state lighting and display. The resultant WOLED shows current efficiency (CE) 36 cd/A, power efficiency (PE) 18.7 lm/W, and 12.5 % external quantum efficiency at 1000 cd/m 2 with maximum luminance of 9,586 cd/m 2 .