Synthesis of Multiaryl‐Substituted Pyridine Derivatives and Applications in Non‐doped Deep‐Blue OLEDs as Electron‐Transporting Layer with High Hole‐Blocking Ability

Two multiaryl-substituted pyridine derivatives, applied as electron transport materials (ETMs; see figure) with good hole- blocking ability in high-performance deep-blue OLEDs, are characterized. The maximum current efficiencies of the devices based on the new compounds are over 70% higher than previously reported devices using traditional ETMs instead. The CIE coordinates of the devices based on the new compounds are close to the NTSC standards of (0.14, 0.08) for blue emission.