Electroluminescence components

H. Spreitzer, W. Kreuder, H. Becker, H. Schoo, and R. Demandt, Aryl-Substituted Poly(p-Arylene Vinylenes), Method for the Production and Use Thereof in Electroluminescent Components, PCT Patent Appl. WO 98/27136, June 25, 1998 (in German). 

A blue light-emitting electroluminescent device was claimed with an emission layer comprising a polymer matrix and a chromophoric component, which was either blended with or covalently attached to the polymer matrix. The chromophoric components were... 

Other models are based on electric breakdown of the oxide [Fo2, Chl2]. It is not clear whether this breakdown should be thought of in terms of an electronic or an ionic effect. However, in both cases breakdown may cause a degradation in the oxide morphology, which leads to an enhanced etch rate. An electric field strength in the order of 10 MV cm4, the observation of an electroluminescent burst associated with the current peak of the oscillation, and the presence of an electronic component in the interface current are in favor of this model [CalO, Chl2]. 

A poly(phenylquinoxaline) was prepared for electroluminescence applications <1996SM(76)105>. Crystallization of solution donor-acceptor complexes of 2,3-dimethylquinoxaline 1,4-dioxide or phenazine 5,10-dioxide with TCNE afforded two-component solids containing weakly bound 1-D donor-acceptor arrays <1997TL7665>. A pyrazine ladder polymer was constructed from two different pyrazine units, as an optical device <1999JA8783>. The new electron-deficient macrocycle tetrakis-2,3-[5,6-di(2-pyridyl)pyrazino]porphyrazine was prepared from l,2-di(2-pyridyl)ethanedione and 2,3-diaminomaleonitrile for a study of its electrochemical properties <2004IC8626>. 

The photoconductivity of polysilanes was described in Section 5.8, and their electroluminescence is covered in Section 5.9.2. These properties make polysilanes possible components of polymer light-emitting diodes, either as charge transport layers or as the actual emissive materials.146 A drawback of the polysilanes is their photodegradation under ultraviolet irradiation, a problem which must be overcome if polysilanes are to become commercially useful. 

A benzo[ /]thioxanthene unit has been incorporated in the emission layer of an OLED display <2004USP2004140761> as part of a polycyclic pigment 614 employed for coloring polymers, inks and toners <2000USP6046335> and also as the key component 615 of a red fluorescence-conversion film and associated electroluminescent devices <1998JPP10316964>. 

The authors have first evaluated the HT system (Atienzar et al., 2004) by screening a 96-well sample library of [Ru(bpy)3]2+ encapsulated in zeolites. The potential of the technique was then investigated through the accelerated optimization of the synthesis of two host-guest materials with photoluminescent properties with potential application as active components in electroluminescent devices or as photocatalysts. 

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