Affiliation:
1. Beijing Institute of Graphic Communication
Abstract
Eu-complexed bis(2-(diphenylphosphino)phenyl)ether oxide (Eu(TTA)3DPEPO) was synthesized. Its photoluminescence (PL) spectra peaked at 607 nm in THF, fluorescence lifetime was measured to be 459.94 μs. The highest occupied molecular orbit (HOMO) and the lowest unoccupied molecular orbit (LUMO) energy levels were -5.25 and -2.02 eV. Four multilayer devices were fabricated with different structures. The EL spectra from Eu3+ characteristic emission at 616 nm would be observed in all devices. The emission from Alq3 was suppressed when BCP was inserted, the balance of charge transport could be achieved when PBD was mixed. The Commission International de L’Eclairage (CIE) coordinates were tuned from (0.36, 0.51) for Device A to (0.63,0.36) for Device D. The luminescence of Devices C and D reached up to 164 and 120 cd/m2.
Publisher
Trans Tech Publications, Ltd.
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