Computational and spectroscopic evaluation of 1,10-phenanthroline based Eu(III) fluorinated β-Diketonate Complexes for displays

Highly red luminescent octacoordinated complexes were synthesized by coordination of Eu(III) ion with the-noyltrifluoroacetone (TTA) and heteroaromatic 1,10-phenanthroline derivatives as auxiliary ligands. To examine their photophysical properties, the ternary europium complexes were characterized spectroscopically. The photoluminescence emission spectra of complexes exhibit characteristic peaks of Eu3+ ion attributed to D-5(0)-> F-7(J) (J = 0-4) transitions in reddish region. Their photoluminescence characteristics clearly specify that ligands have effectively sensitized the trivalent europium ion via antenna effect. Decay time, Judd-Ofelt parameters, transition rates and quantum efficiency were calculated from photoluminescence emission data. Structural and energy transfer parameters were determined from LUMPAC software. Color parameters estimated from photo-luminescence spectral data suggest the red luminous behaviour of synthesized complexes. The outcomes ascertain the adaptability of complexes for the fabrication of solid state lighting, OLEDs and flat panel displays when red emission is required for display.

Automated summary

Highly red luminescent octacoordinated complexes were successfully synthesized by coordinating Eu(III) ion with auxiliary ligands. Spectroscopic characterization revealed the red luminescent properties of the complexes, indicating effective sensitization of the trivalent europium ion. Various parameters were calculated from the photoluminescence emission data, and color parameters suggested the red luminous behavior of the synthesized complexes. The research findings indicate the potential applications of these complexes in solid state lighting, OLEDs, and flat panel displays.