Low driving voltage and high power efficiency in blue phosphorescent organic light-emitting diodes using aromatic amine derivatives with diphenylsilyl linkage

A diphenylsilyl based aromatic amine derivative, 4,4′-(diphenylsilanediyl)bis(N,N-diphenylaniline) (TSBPA), was synthesized as a high triplet energy hole transport material for blue phosphorescent organic light-emitting diodes (PHOLEDs) and the device performances of the blue PHOLEDs were investigated. TSBPA was compared with common N,N′-dicarbazolyl-3,5-benzene as the hole transport material for blue PHOLEDs, and low driving voltage and improved power efficiency were demonstrated.

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► High triplet energy hole transport materials with diphenylsilyl linkage.
► Low driving voltage and high power efficiency in blue device.
► High quantum efficiency above 20% in blue device.