Synthesis, Characterization, and Luminescent Properties of a Red-Emitting Europium Complex

Abstract:

a fluorine functionalized 1,10-phenanthroline ligand, 3-ethyl-2-(2-fluorophenyl) imidazo[4,5-f]1,10-phenanthroline(EFPIP) and the corresponding red-emitting Eu(ΙΙΙ) complex Eu(DBM)₃(EFPIP) (DBM = dibenzoylmethanate) was synthesized and the photophysical properties and electroluminescent(EL) performances were researched. When Eu(DBM)₃(EFPIP) was used as emitting material in organic devices, the maximum efficiency and luminance of red emission achieved from the EL device with the configuration of ITO/m-MTDATA (30 nm)/NPB (20 nm)/ x wt% Eu(DBM)₃(EFPIP) doped in CBP (30 nm)/Bphen (20 nm)/Alq₃ (20 nm)/LiF (0.8 nm)/Al were 3.6 cd/A and 563 cd/m², respectively. Compared with the previously reported devices based on methyl or chlorine substitute Eu(ΙΙΙ) complexes, the EL performances of the device using Eu(DBM)₃(EFPIP) as an emitter was significantly enhanced due to the introduction of fluorine.

• Periodical: Advanced Materials Research (Volumes 512-515)
• Pages: 1771-1775
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.512-515.1771
• Online since: May 2012
• Authors: Li Ying Zhang, Bin Li, Gang Lv
• Keywords: Electroluminescence, Europium Complex, Fluorination

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