Novel Europium Complex for Electroluminescent Devices with Sharp Red Emission

Abstract

A volatile Eu complex, Eu(TTA)3(phen) (TTA=thenoyltrifluoroacetone, phen=1,10-phenanthroline), was synthesized and applied to an electroluminescent (EL) cell structure of [ITO(=indium-tin-oxide)/hole transporting layer/emitting layer (host material=azomethin zinc complex, and dopant= Eu(TTA)3(phen))/MgIn]. The emitting layers were formed by a codeposition technique. A red emission (EL peak wavelength 614 nm) with a very sharp spectral band was observed from the EL cell with 5 wt% Eu(TTA)3(phen), and a maximum luminance of 137 cd/m2 was achieved.

Thin Films of Highly Luminescent Lanthanide Complexes Covalently Linked to an Organic−Inorganic Hybrid Material via 2-Substituted Imidazo[4,5-f]-1,10-phenanthroline Groups

“…Due to the poor absorption abilities of the lanthanide ions, it is common practice to form complexes of the lanthanide ions with organic ligands that strongly absorb light and transfer the energy to the metal center (antenna effect). [1][2][3][4][5][6][7][8][9] In addition, the ligands expel water from the first coordination sphere, which can cause radiationless deactivation. 10,11 To explore the potential of the complexes for photonic applications (light-converting devices), [12][13][14][15][16][17] it is useful to incorporate the complexes in an inert host matrix.…”

Quantum Chemical Study of the OLED Materials Tris[4'-(1"-phenylbenzimidazol-2"-yl)phenyl] Derivatives of Amine and Benzene

“…Several types of OLED, including conjugated polymers, [5][6][7] metal complexes, 8,11 and dyes 9,10 have demonstrated desirable optoelectronic properties, such the emitting wavelength and efficiency, thermal stability, and amorphous film formation property. Synthetic aspects of the OLED investigation have been largely on a trial and error basis, mostly depending on empirical rules, such as the prediction of emitting wavelengths based on HOMO and LUMO energy levels.…”

Investigations of CTAB Assisted Cadmium Complex: An Organometallic Compound for Organic Light Emitting Diode Applications

“…Nowadays cadmium complexes have been synthesized by different groups for their use in OLED applications due to their thermal stability, simplicity in synthesis procedure and wide spectral range. Extensive research work is going on to synthesize new cadmium complexes containing new ligands to produce a number of novel luminescent cadmium complexes as emitters and electron transporters in OLED applications [8][9][10] [11][12][13]. In this paper, we report the synthesis of cadmium[(2-(2-hydroxyphenyl)benzoxazole)(8-hydoxyquinoline)], Cd(HPB)q by a simple novel method and the effect of surfactant CTAB ( 0.5%) on its structural, morphological, optical and photoluminescence properties.…”