47results about How to "Improved service life characteristics" patented technology

The present specification provides a compound represented by chemical formula 1, and an organic light-emitting device comprising same.

The present specification relates to a compound and an organic electronic device including the same.

The present invention provides an organic light emitting device including a dibenzothiophene-based compound and an organic material layer composed of one more layers including a first electrode, a second electrode and a light emitting layer disposed between the first electrode and the second electrode, in which one or more layers of the organic material layer include the dibenzothiophene-based compound of Formula 1 or a compound in which a heat curable or photo curable functional group is introduced into the dibenzothiophene-based compound.

The present invention provides a cathode active material for a secondary battery, the cathode active material being a lithium cobalt-based oxide comprising doping element M, wherein particles of the lithium cobalt-based oxide contain the doping element M in an amount of 3,000 ppm or higher wherein the doping element M is uniform in concentration across a bulk portion covering the core side corresponding to 90 % of the radius from the core to the surface in the particle and present in a surficial portion at a concentration identical to or higher than in the bulk portion and has a concentrationgradient gradually decreasing from the surface of the particle in the core direction, the surficial portion covering a depth of 100 nm from the surface of the particle in the core direction.

The present disclosure relates to an organic electroluminescent compound and an organic electroluminescent device comprising the same. By using the organic electroluminescent compound of the present disclosure, an organic electroluminescent device having low driving voltage, high luminous efficiency, and / or long lifespan properties can be provided.

The present invention relates to a positive electrode for a lithium air battery and a lithium air battery comprising the same and, more specifically, to a positive electrode for a lithium air battery, the positive electrode containing oxygen as a positive electrode active material and comprising a gas diffusion electrode including a transition metal deposition layer formed on a surface; and to a lithium air battery comprising the same.

A multilayer ceramic capacitor has a laminate including dielectric layers laminated alternately with internal electrode layers of different polarities, wherein the dielectric layer contains ceramic grains having Ba, Ti, and X (wherein X represents at least one type of element selected from the group consisting of Mo, Ta, Nb, and W) and a variation in the concentration distribution of X above in the ceramic grain is within ±5%. The multilayer ceramic capacitor can offer excellent service life characteristics even when the thickness of the dielectric layer is 0.8 μm or less, as well as excellent bias characteristics.

A multilayer ceramic capacitor includes a laminate constituted by internal electrode layers of different polarities alternately layered via dielectric layers, wherein the multilayer ceramic capacitor is such that the dielectric layers contain ceramic grains whose primary component is BaTiO3, the ceramic grains contain Mo, Mn, rare earth R, and at least one of V and W, and the average valence number of Mo in the ceramic grains is 4.50 to 5.50. The multilayer ceramic capacitor can offer excellent service life characteristics and sufficiently suppress leak current even when the thickness of the dielectric layer is 0.8 μm or less.

A nitride semiconductor laser element, comprises a substrate, a nitride semiconductor layer laminated on said substrate and having a ridge on its surface, a first protective film that covers said nitride semiconductor layer, and an electrode form on the ridge and the first protective film, wherein the first protective film covers part of the nitride semiconductor layer surface in a contact state, and covers from the periphery around the base of the ridge to the side faces of the ridge in a non-contact state, resulting in a cavity being disposed from said ridge side faces to the ridge base periphery.

The present invention relates to an organic light emitting device comprising: an anode; a cathode; and a light emitting layer disposed between the anode and the cathode, in which a first organic material layer is included between the light emitting layer and the anode, the first organic material layer comprising a composition containing a compound of Chemical Formula 1 or a cured product thereof; and including a second organic material layer between the first organic material layer and the light emitting layer, the second organic material layer comprising a composition comprising a copolymer of Chemical Formula 2 or a cured product thereof, where all variables are described herein. [Chemical Formula 1] [Chemical Formula 2]

Dielectric layers are prepared using a dielectric material that contains a ceramic powder having Ba, Ti, and additive element X which is solid-solubilized and is at least one element selected from the group consisting of Mo, Ta, Nb, and W, wherein the standard deviation of the ratio of the peak intensity of the additive element X (XKα) measured by STEM-EDX, and the sum of the peak intensity of the Ti and peak intensity of the Ba (BaLα+TiKα) measured by STEM-EDX, is less than 10.5% of the average ratio as measured at a total of five points including the three points that divide the maximum diameter of one grain of the ceramic powder into four equal parts, and two excluding the center point of the three points that divide the diameter crossing at right angles with the maximum diameter at its center point, into four equal parts.

The invention belongs to the technical field of film separation, and specifically, relates to a high temperature-resisting filter pressing film for separating furfural, a preparation method thereof and application thereof in furfural separation. The high temperature-resisting filter pressing film for separating the furfural is prepared from the following raw materials: a film forming material, a solvent, a film forming additive, a dispersing agent, a plasticizing agent, a defoaming agent, a dehydrating agent, a high temperature-resisting protective agent, a compressive protective agent, accessories and the like. Primary experiment detection shows that the high temperature-resisting filter pressing film provided by the invention has better high temperature-resisting property and has good acid-base corrosion resistance at the same time; the high temperature-resisting filter pressing film has higher film flux, good machinability and good thermal stability, and has a very important application value in increasing the yield of the furfural and reducing film separation time; meanwhile, since the high temperature-resisting filter pressing film has the characteristics that film pollution is reduced and the service life is longer, a higher popularization and application value is obtained.

Provided is a new method for producing a positive electrode active material for lithium secondary batteries, by which even in the case of washing a spinel type lithium transition metal oxide with water or the like, the service life characteristics can be further enhanced, and the concentration of magnetic substances can be effectively reduced. Suggested is a method for producing a positive electrode active material for lithium secondary batteries, the method including a water washing step of bringing a powder of a spinel type lithium transition metal oxide into contact with a polar solvent and thereby washing the powder; and a drying step of subsequently drying the powder by heating the powder to 300° C. to 700° C. in an atmosphere containing oxygen.