Abstract:
An organic electro-luminescent device. The device comprises two electrodes and an organic electro-luminescent structure interposed therebetween. The electrodes are disposed on a substrate, one serving as an anode and the other as a cathode. The organic electro-luminescent structure comprises a fluorescent emissive layer, a phosphorescent emissive layer and a nondoped organic material layer interposed therebetween. The phosphorescent emissive layer has a host material. The nondoped organic material layer has a highest occupied molecular orbital (HOMO) energy level no higher than that of the host material in the phosphorescent emissive layer.
Abstract:
A white organic light-emitting diode includes two symmetric emission layers and a middle emission layer. The two symmetric emission layers emit a first color light with approximately the same frequency components. The middle emission layer is located between the two symmetric emission layers. The middle emission layer emits a second color light with frequency components different from main frequency components of the first color light. When the voltage applied to the organic light-emitting diode changes and leads to a decrease of luminescent intensity of one of the symmetric emission layers, the other symmetric emission layer automatically increases the luminescent intensity to compensate for the reduced light intensity.
Abstract:
A phosphorescent OLED uses a phosphorescent dopant in the emissive layer, the dopant includes a metal complex containing a plurality of moieties linking to a transition metal ion. One or more of the moieties contain a ligand with a C—SP3 carbon center. The transition metal ion can be an iridium ion. The C—SP3 carbon is linked to a chalcogen atom in an ion form, a nitrogen-containing heterocylic ring and two functional groups, wherein each of the functional groups is selected from aryl, alkyl and heteroaryl. The tetrahedral structure of this carbon center hinders close packing and intermolecular interactions and, therefore, renders the transport of holes in the light-emitting device more efficient. With such chemical structure and property, the self-quenching characteristics of the dopant in high doping concentration can be effectively reduced.
Abstract:
A phosphorescent OLED uses a phosphorescent dopant in the emissive layer, the dopant includes a metal complex containing a plurality of moieties linking to a transition metal ion. One or more of the moieties contain a ligand with a C—SP3 carbon center. The transition metal ion can be an iridium ion. The C—SP3 carbon is linked to a chalcogen atom in an ion form, a nitrogen-containing heterocylic ring and two functional groups, wherein each of the functional groups is selected from aryl, alkyl and heteroaryl. The tetrahedral structure of this carbon center hinders close packing and intermolecular interactions and, therefore, renders the transport of holes in the light-emitting device more efficient. With such chemical structure and property, the self-quenching characteristics of the dopant in high doping concentration can be effectively reduced.
Abstract:
A phosphorescent OLED uses a phosphorescent dopant in the emissive layer, the dopant includes a metal complex containing a plurality of moieties linking to a transition metal ion. One or more of the moieties contain a ligand with a C-SP3 carbon center. The transition metal ion can be an iridium ion. The C-SP3 carbon is linked to a chalcogen atom in an ion form, a nitrogen-containing heterocylic ring and two functional groups, wherein each of the functional groups is selected from aryl, alkyl and heteroaryl. The tetrahedral structure of this carbon center hinders close packing and intermolecular interactions and, therefore, renders the transport of holes in the light-emitting device more efficient. With such chemical structure and property, the self-quenching characteristics of the dopant in high doping concentration can be effectively reduced.
Abstract:
A phosphorescent OLED uses a phosphorescent dopant in the emissive layer, the dopant includes a metal complex containing a plurality of moieties linking to a transition metal ion. One or more of the moieties contain a ligand with a C—SP3 carbon center. The transition metal ion can be an iridium ion. The C—SP3 carbon is linked to a chalcogen atom in an ion form, a nitrogen-containing heterocylic ring and two functional groups, wherein each of the functional groups is selected from aryl, alkyl and heteroaryl. The tetrahedral structure of this carbon center hinders close packing and intermolecular interactions and, therefore, renders the transport of holes in the light-emitting device more efficient. With such chemical structure and property, the self-quenching characteristics of the dopant in high doping concentration can be effectively reduced.
Abstract:
A white organic light-emitting diode includes two symmetric emission layers and a middle emission layer. The two symmetric emission layers emit a first color light with approximately the same frequency components. The middle emission layer is located between the two symmetric emission layers. The middle emission layer emits a second color light with frequency components different from main frequency components of the first color light. When the voltage applied to the organic light-emitting diode changes and leads to a decrease of luminescent intensity of one of the symmetric emission layers, the other symmetric emission layer automatically increases the luminescent intensity to compensate for the reduced light intensity.
Abstract:
An organic electro-luminescent device. The device comprises two electrodes and an organic electro-luminescent structure interposed therebetween. The electrodes are disposed on a substrate, one serving as an anode and the other as a cathode. The organic electro-luminescent structure comprises a fluorescent emissive layer, a phosphorescent emissive layer and a nondoped organic material layer interposed therebetween. The phosphorescent emissive layer has a host material. The nondoped organic material layer has a highest occupied molecular orbital (HOMO) energy level no higher than that of the host material in the phosphorescent emissive layer.
Abstract:
A seat assembly is revealed. A connection slot is formed around a circumference of a rear side of a support and an assembly block is projectingly arranged at a center of the connection slot. At least one channel penetrating from one side to the other side of the assembly block is formed on the assembly block. A cloth surface is covered from a front side to a rear side of the support and a circumference thereof is mounted into the connection slot. A frame formed by injection molding is to cover the circumference of the rear side of the support and fill into the connection slot and the channel so as to connect and secure the cloth surface with the frame as well as the support by multiple bends of the cloth surface and infiltration of frame material into pores of the cloth surface.
Abstract:
An exemplary metal structure (10, 30) includes a base portion (14, 34), a flange (122, 322), and an edge portion (1241, 3241). The base portion defines a circular flanged hole (12, 32). The flange extends from a top surface of the base portion and the flange surrounds the circular flanged hole. The edge portion is configured for connecting an inside surface of the flange and the top surface of the base portion. The edge portion includes an edge surface, and a ratio of a radius of the edge surface (1242, 3242) of the edge portion with respect to a thickness of the base portion is less than 0.4. A method for making a circular flanged hole in a metal sheet (15) is also provided.