37results about "Benzathrone dyes" patented technology

Disclosed is an organic EL element (1)-which is provided with a counter electrode (6), an organic light-emitting layer (5), and a transparent electrode (4) on a translucent substrate (2)-wherein: a light extraction layer (3), of which a high refractive index layer (31) adjacent to the transparent electrode (4) and a low refractive index layer (32) adjacent to the translucent substrate (2) are stacked, has a plurality of irregular-section units (31A) configured from convex sections (311) and concave sections (312) at the interface of the high refractive index layer (31) and the low refractive index layer (32); in at least one of the plurality of irregular-section units (31A), the distance (d1) from the interface between the high refractive index layer (31) and the low refractive index layer (32) to the interface between the transparent electrode (4) and the high refractive index layer (31) is at least the optical coherence length; and the height (d2) of the convex sections (311), the width (d3) of the convex sections (311), and the spacing (d4) between each convex sections (311) and the adjacent convex sections (311) with concave sections (312) therebetween is at least 1 [mu]m.

The present invention relates to organic electroluminescent devices comprising aromatic nitrogen heterocyclics, in particular in a hole injection layer and / or in a hole blocking layer and / or in an electron transport layer and / or in an emitting layer.

Provided is an anthracene derivative represented by formula (1). In formula (1), one of R11 to R20 is used to bond to L1, and those of R11 to R20 not used to bond to L1 are each independently a hydrogen atom, a halogen atom, a cyano group, a substituted or unsubstituted alkyl group having 1-20 carbon atoms, or the like. L1 is a single bond, a substituted or unsubstituted ring-forming divalent aromatic hydrocarbon group having 6-50 carbon atoms, or the like. Z is a structure represented by formula (2). In formula (2), one of R1, R3 and R4 is used to bond to L1, and those of R1, R3 and R4 not used to bond to L1, R2 and R5 to R10 are each independently a hydrogen atom, a halogen atom, a cyano group, a substituted or unsubstituted alkyl group having 1-20 carbon atoms, or the like. However, among R5 to R8, at least one pair of two adjacent groups bond to each other to form a saturated or unsaturated hydrocarbon ring.

The present invention relates to organic electroluminescent compounds represented by Chemical Formula 1 or 2, a process for preparing the same, and an organic light emitting diode (OLED) which comprises, as a luminescent region interposed between an anode and a cathode, at least one compound (s) selected from those represented by Chemical Formula 1 or 2, and at least one compound selected from anthracene derivatives, benz[a]anthracene derivatives and naphthacene derivatives. The electroluminescent compound according to the present invention is a green electroluminescent compound having maximized electroluminescent efficiency and lifetime of device.

The invention relates to the compounds of formula (1) and to organic electroluminescent devices, in particular blue-emitting devices, in which said compounds are used as the host material or doping agent in the emitting layer and / or as the hole transport material and / or as the electron transport material.

Provided are a novel spiro compound, and an organic luminescence device using the spiro compound and having an optical output with an extremely high efficiency and a high luminance, and an extremely high durability. The Spiro compound is represented by the following general formula [I]:(wherein R1, R2, R3, and R4 represent a hydrogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted aralkyl group, a substituted or unsubstituted aryl group, a substituted or unsubstituted heterocyclic group, a substituted amino group, a cyano group, or a halogen atom, and R1, R2, R3, and R4 may be identical or different from each other; and Ar1 and Ar2 represent a substituted or unsubstituted condensed polycyclic aromatic group or a substituted or unsubstituted condensed polycyclic heterocyclic group, which may be identical or different from each other.)

Fluorescent functional dyes represented by the following formulas: wherein R1 is hydrogen or methyl; R2, R3, R4, R5, and R6 are each independently selected from the group consisting of hydrogen, alkyl, aryl, alkoxy, aralkyl, alkaryl, halo, and trifluoromethyl; and L is a straight chain or branched chain alkylene containing 3 to about 15 carbon atoms, the alkylene group optionally containing one or more catenary heteroatoms.

A benzanthracene derivative having hydrogen atom at the 12-position, and an organic electroluminescence device having an organic thin film layer, which has one layer or a plurality of layers including at least a light emitting layer, is disposed between a cathode and an anode and contains the benzanthracene derivative in at least one layer in the organic thin film layer singly or as a component of a mixture. The electroluminescence device provides a great efficiency of light emission, has a long life and exhibits an excellent chromaticity.

A superfine kaolin flake material is prepared through mixing potassium acetate as sandwich agent with kaolin grinding, intercalating, laying aside, water washing, centrifugal separating of patassium acetate, stripping kaolin flakes, baking and grinding. Its advantages are high intercalating rate and slake-stripping effect, and low cost.

An organic EL device comprises: a light-transmissive substrate; a transparent electrode; an organic emitting layer; and an opposing electrode. A light-extraction layer provided by layering a high refractive index layer adjoining the transparent electrode and a low refractive index layer adjoining the light-transmissive substrate includes recess-protrusion units each provided by a protrusion and a recess at an interface between the high refractive index layer and the low refractive index layer. In at least one of the recess-protrusion units, a distance from the interface between the high refractive index layer and the low refractive index layer to an interface between the transparent electrode and the high refractive index layer is equal to or more than an optical coherence length and a height of the protrusion, a width of the protrusion and a gap between the protrusion and another protrusion adjoining the protrusion across the recess is 1 μm or more.

The present invention relates to substituted benzo[c]phenanthrene derivatives and to the production and to the use thereof in electronic devices, and to the electronic devices themselves. The present invention relates in particular an electronic device containing 10-benzo[c]phenanthrene derivatives of, e.g., formula (II)substituted with at least one aromatic unit or at least one diarylamino unit.