Electroluminescence from Polysilane Film Doped with Europium Complex

Abstract

Electroluminescent devices with poly(methylphenylsilane) film doped with Eu3+ complexes were fabricated. The cell structure of glass substrate/indium-tin-oxide/polysilane/electron transport layer/Mg/Ag was employed. Sharp red electroluminescence of europium ion was obtained at dc bias voltage of over 12 V.

Phosphorescent materials for application to organic light emitting devices

“…Since these transitions possess very sharp spectral bands, near monochromatic or`saturated' luminescence results. This is obviously also desirable in OLEDs, and examples are red-emitting complexes [14,15] of Eu 3 , greenemitting complexes [5] of Tb 3 , and more recently 1.54 mm electroluminescence has been generated [16] from Er 3 , although the ef®ciencies in all cases have been low (typically < 1%). It is illustrative to examine the most successful application [15] yet of a lanthanide complex to OLEDs.…”

Crystal structure of (6-methyl-2-pyridinyl)acetoacetamide, C10H12N2O2

“…The europium(m) and terbium(III) complexes with conjugated ligands such as /?-diketonato have been studied as emitting materials for organic electroluminescent diodes (OLEDs) [2,3] due to the initial report [4], However, the quantum efficiency of most these complexes is unfortunately still low. This may be mostly caused by the inefficiency of the energy transfer, in particular triplet-triplet transfer.…”

Facilitated Energy Transfer in Hierarchically-Ordered Polymers

“…To our knowledge, the ratios for the dendrimers in acetonitrile are the highest known, indicating that these dendrimers may be the most asymmetric organoeuropium coordination compounds prepared to date. 11 It is interesting to note that solvent (acetonitrile or toluene) plays a large role in the nature of the first coordination sphere, presumably due to differences in steric congestion of the ligands caused by differences in their solvation. The asymmetry ratios also discredit the third explanation given earlier for the methoxy proton relaxation data obtained.…”

“…6 7 Over the past thirty years, trivalent lanthanide complexes have been used in many applications such as luminescent probes, 8 lasers, 9,10 and organic light emitting diodes (OLEDs). [11][12][13] Unlike organic dyes and polymers, whose fluorescence or phosphorescence bands are typically broad, lanthanides have narrow width emission bands (<10 nm full width at half maximum).…”