White organic light-emitting devices based on 4,4′-bis(2,2′-diphenyl vinyl)-1,1′-biphenyl and phosphorescence sensitized 5,6,11,12-tetraphenylnaphthacene

摘要

We report white organic light-emitting devices (WOLEDs) based on 4,4′-bis(2,2′-diphenyl vinyl)-1,1′-biphenyl (DPVBi) and phosphorescence sensitized 5,6,11,12-tetraphenylnaphthacene (rubrene). In the devices, DPVBi acts as a blue light-emitting layer, and rubrene sensitized by a phosphorescent material, fac tris (2-phenylpyridine) iridium [Ir(ppy)_3], acts as a yellow light-emitting layer. The devices have a maximum brightness of 8633 cd/m~2 (at a driving voltage of 22 V). The maximum luminous efficiency is 9.22 cd/A (at a current density of 0.90 mA/cm~2). Commission international De L'Eclairage coordination of (0.30,0.37) is obtained for luminance ranging from 100 to 1000 cd/m~2.