Abstract
A series of highly efficient blue dopants based on the iminodibenzyl-substituted distyrylarylene (IDB-DSA) fluorescent dye using the concept of steric compression of a rigidized and over-sized ring have been designed and synthesized. When doped in the stable 2-(methyl)-9,10-di(2-naphthyl)anthracene (MADN), the seven-membered DSA (7-DSA-Ph) doped device achieved a luminance efficiency of 9.1 cd/A at 20 mA//cm2 with a CIEx,y color coordinate of (0.16, 0.28) and a maximum external quantum efficiency of 4.8%. When used in a 2-element WOLED system, the 7-DSA-Ph doped device achieved a luminance efficiency of 11.0 cd/A at 20 mA/cm2 with a CIEx,y color coordinate of (0.29, 0.36).
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