The Tuning Color of Red Electroluminescence Based on Eu-Complexed Bis(2-(diphenylphosphino)phenyl)ether Oxide

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.

• Periodical: Advanced Materials Research (Volumes 557-559)
• Pages: 781-784
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.557-559.781
• Online since: July 2012
• Authors: Hui Pang, Wen Guan Zhang, Sheng Min Zhao
• Keywords: Bis(2-(diphenylphosphino)phenyl)ether Oxide, Electroluminescent Device, Europium Complex, N-Vinylcarbozole, Red Fluorescent, Tuning Color

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