New limb structured blue light emitting materials for OLEDs

We designed new three limb structured anthracene derivatives, PNA, NNA and FNA, which are composed of an anthracene core and naphthalene units at the 9,10-positions of anthracene and phenyl, naphthalene and fluorene units at the 2,3-positons of anthracene. The effect of the introduced limbs on the 2,3,9,10-positions of anthracene was studied. The doped EL devices using ADN as a host and (3% PNA or NNA or FNA) as a dopant showed similar maximum quantum efficiency of 3.9%–4.3% with high color purity of (0.15, 0.13).

► New three limb structured anthracene derivatives were synthesized.
► The structures were 3-dimensionally highly twisted non-coplanar.
► New three limb structured anthracenes as dopant exhibited efficiency of 3.9–4.3%.
► The doped EL devices showed high color purity of (0.15, 0.13).