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Showing results 1 to 14 of 14
TitleDescriptionAcademic Year
Catalyst containing platinum and palladium for the selective reduction of NOx with hydrogen (H2-SCR)The invention relates to a novel catalyst having excellent activity and selectivity for reducing nitric oxides (NO/NO2) to nitrogen gas (N2) with hydrogen (H2) being used as a reducing agent under strongly oxidizing conditions (e.g., 2-10 vol % O2) (H2-SCR) in the 100-400° C. range, but in particular to the low-temperature range 100-200° C. The inventive catalyst is a combination of platinum and palladium which are in contact with solid phases of a mixed MgO and CeO2 medium.
Catalyst for the reduction of NO to Nwith hydrogen under NOx oxidation conditionsThe invention relates to a novel catalyst having excellent activity, selectivity and stability for reducing nitric oxide to gas nitrogen, with hydrogen being used as a reducing agent, in the low temperature range 100–200° C. and in the presence of an excess of oxygen (e.g. 5% vol), H2O (5% vol) and/or SO2 (20 ppm) in the supply. The inventive catalyst consists of platinum crystals which are in contact with the phases of a mixed MgO and CeO2 medium or in the form of platinum supported on the mixed MgO—CeO2 medium which has already been sulphated in a selective manner. The Pt/MgO—CeO2 catalyst can be used to obtain NO conversion levels which are greater than 40% and nitrogen selectivity values of greater than 80% under NOx oxidation conditions in the 100–400° C. temperature range and for a surface contact time of 0.045 s. In particular, full NO conversion is obtained as well as N2 selectivity levels of 83% at 150° C. with a reaction mixture of 0.25% NO/1% H2/5% O2/5% H2O/He.
Interface conditioning to improve efficiency and lifetime of organic electroluminescence devicesAn organic light emitting diode (“OLED”) display or device is typically comprised of: a transparent anode on a substrate; a hole injection/transporting layer; a light emitting layer (“emissive layer”); and a cathode, where one or more of these layers are organic in nature. When a forward bias is applied, holes are injected from the anode into the hole injection/transporting, and the electrons are injected from the cathode into the emissive layer. Both carriers are then transported towards the opposite electrode and allowed to recombine with each other. The location of this recombination is called the recombination zone and due to the recombination, the emissive layer produces visible light. There is some suggestion in a published patent application that incorporation of metal nano-particles within a polymer-based light emitting layer suppresses photo-oxidation and enhances luminous stability [Publication number US 2004/0217696 A1]. Yet another patent application suggests that acceleration of the radiative processes is achieved by incorporation of metal nano-particles within the hole transporting layer or within the light emitting layer of phosphorescence based OLEDs [Publication number US 2005/0035346]. The acceleration of the radiative processes is achieved by the interaction of the light emitting species with surface plasmon resonances in the vicinity of metal nano-particles. Non-radiative Förster-type processes are efficiently suppressed by encasing each nano-particle in organic capping molecules. In all of the above approaches, metal nano-particles were blended in one or more layers of the OLEDs. However direct incorporation of metal nano-particles into the active region or other layers within the OLED can cause additional negative effects. For example, it has been demonstrated that incorporation of a gold nano-particle even at low volume fraction of 3×10−5 within a light emitting polymer layer introduces strong hole blocking effects and a large increase in operating voltage [Publication number US 2004/0217696 A1 and Jong Hyeok Park et al., Chem. Mater. 2004, 16, 688]. Furthermore, incorporation of metal nano-particles in both fluorescence-based and phosphorescence-based OLEDs will likely quench emission and strongly deteriorate device performance. Encasing nano-particles in organic capping molecules is suggested to achieve an optimum balance between quenching and acceleration of the radiative processes of the triplets states [Publication number US 2005/0035346]. However achieving such a condition is not straightforward and capping of the metal nano-particles is not a well known procedure.
Method and system for detecting fake accounts in online social networksA system and method for detecting fake accounts in OSNs is proposed to aid the OSN provider 20 against fake users, wherein a social graph G of the OSN, with n nodes, a non-Sybil region GH and a Sybil region GS, is obtained and the following steps are performed: a trust value T(i)(v) is computed through i power iterations on each node v of the social graph G, i=0, 1, . . . O(log n) the power iterations distribute the trust value T(i)(v) from each node v to its neighbor nodes, after O(log n) power iterations, ranking nodes by a degree-normalized trust T ^ v = T ( w ) ⁡ ( v ) deg ⁡ ( v ) in order to obtain a ranked list of nodes, detecting fake accounts based on the obtained ranked list assigning intervals in the ranked list to a fake portion, determined by manual inspection means of the OSN provider, based on the degree-normalized trust of the nodes belonging to the intervals.
Method to generate high efficient devices which emit high quality light for illuminationAn electroluminescent apparatus includes an OLED device emitting light in the blue and green spectrums, and at least one down conversion layer. The down conversion layer absorbs at least part of the green spectrum light and emits light in at least one of the orange spectra and red spectra.
A multi-hop and multi-path store and forward system, method and product for bulk transfersA multi-hop and multi-path store and forward system for bulk transfers comprising a plurality of nodes (100) wherein each node (100) also comprises an overlay management module (1) that is arranged to add a new node (100) to the overlay, removing it, and maintaining the overlay connections during the node's participation in the system; a volume prediction module (2) which is arranged to maintain a time series with the predicted maximum volume of data that can be forward to each neighbour node during each one of the slots that make an entire day; bootstrapping, ISP - friendliness, and security means; a scheduling and routing module (3) for all data transfers between a sender v, storage nodes w and a receiver node u; and wherein the module (3) also comprises volume prediction means to calculate an initial transfer plan and keeps updating it periodically as it receives updated predictions from the nodes, and means for solving a maximum network flow optimization problem; and wherein a transmission management module (4) is arranged to receive, scheduling and routing commands from the scheduling and routing module (3) of senders v for which a local node is forwarding and executes them accordingly. Aim of the system is to split a large file into multiple chunks using a number of intermediate storage nodes to bypass MTABs (Multiple Time aligned Bottlenecks) and shorten the delivery times for bulk data.
Novel method to generate high efficient devices which emit high quality light for illuminationWhat is disclosed is an electroluminescent apparatus comprising: an OLED device emitting light in the blue and green spectrums; and at least one down conversion layer, said down conversion layer absorbing at least part of the green spectrum light and emitting in at least one of the orange spectra and red spectra.
OLED with Area Defined Multicolor Emission Within a Single Lighting ElementDisclosed is an organic electroluminescent device, comprising: a) a substrate; b) a first electrode disposed over the substrate; c) a composite light emitting layer comprising two or more light emissive materials, disposed over the first electrode; and d) a second electrode disposed over the composite light emissive layer, the electrodes commonly and singularly addressing the composite light emissive layer.
Organic electrophosphorescence device having interfacial layersTechniques are described for forming an organic light emitting diode device with improved device efficiency. Materials having at least one energy level that is similar to those of a phosphorescent light emitting material in the diode are incorporated into the device to directly inject holes or electrons to the light emitting material.
Photovoltaic Cell Having Multiple Electron DonorsPhotovoltaic cells having multiple electron donors and/or multiple acceptors, as well as related components, modules, systems, and methods, are disclosed.
Polymer and small molecule based hybrid light sourceAn organic electroluminescent device, includes: a substrate; a hole-injecting electrode (anode) coated over the substrate; a hole injection layer coated over the anode; a hole transporting layer coated over the hole injection layer; a polymer based light emitting layer, coated over the hole transporting layer; a small molecule based light emitting layer, thermally evaporated over the polymer based light emitting layer; and an electron-injecting electrode (cathode) deposited over the electroluminescent polymer layer.
Radiation emitting deviceA radiation emitting device comprising a first electrode, which emits first charge carriers having a first charge during operation, a first charge carrier transporting layer, which comprises a fluorescent substance, a second charge carrier transporting layer, which contains a phosphorescent substance, and a second electrode, which emits second charge carriers having a second charge during operation, wherein during operation the second charge carrier transporting layer is largely free of first charge carriers.
Tandem Photovoltaic CellsThis disclosure relates to tandem photovoltaic cells, as well as related systems, methods, and components. In one aspect, this disclosure features systems that include first and second semi-cells. The first semi-cell includes a first electrode, a third electrode, and a first photoactive layer between the first and third electrodes. The second semi-cell includes a second electrode, the third electrode, and a second photoactive layer between the second and third electrodes. The first and second semi-cells are electrically connected in parallel. The third electrode is between the first and second electrodes and includes a first material selected from the group consisting of metals, carbon nanotubes, carbon nanorods, fallerenes, and combinations thereof. The systems are configured as photovoltaic systems.
Thin film optoelectronic devices using delafossite typr metal oxides and methods of their fabricationA novel method for fabricating delafossite type metal oxides thin films, and the novel electrically active delafossite type metal oxides thin film are presented. The method comprises: providing a liquid-phase film material comprising a solution of a precursor material having at least one metal ion source and at least one selected fuel compound in at least one selected polar solvent; and using the liquid-phase film material for fabricating a multi-layer structure comprising at least one optically active layer configured with desired optical, electronic and mechanical properties. The film material is deposited on a surface of a structure comprising the optically active layer, and a post deposition treatment is applied to the deposited film material to transform the film material into an electrically active delafossite type metal oxide film being a semi- crystalline film comprising amorphous and crystalline regions.