90results about How to "Reduced current efficiency" patented technology

The present invention relates to a quantum dot electroluminescent device. The quantum dot electroluminescent device comprises a first electrode layer, a luminescent layer and a second electrode layerwhich are stacked in order; a first electron transfer layer and a second electron transfer layer are arranged between the luminescent layer and the second electrode layer; the materials of the first electron transfer layer comprise inorganic metallic oxide transmission materials, and the materials of the second electron transfer layer comprise organic electron transport materials. The electron transfer layers with two different materials are used in a stack mode to weaken the difference of the hole mobility and the electronic mobility, achieve the carrier balance and greatly improve the current efficiency, and can be applied to the fields of solid-state lighting and panel display.

There is described a method and a system for evaluating damage of a plurality of cells in an electrolyser. The method comprises acquiring a voltage for each one of the cells; comparing the voltage to at least two threshold voltage levels; classifying the cells as one of: severely damaged cells, non-severely damaged cells and undamaged cells, based on the comparison of the voltage with the at least two threshold voltage levels; and deactivating the cells classified as severely damaged cells from the electrolyser.

The invention provides a method and a system for preparing ferric chloride, electrodeposited copper and copper powder from copper-containing hydrochloric acid waste liquid. The system comprises a first liquid storage tank, a stirring reactor, a filter, a chlorine absorption tank, a caustic soda solution absorption tower, a solution adjusting tank, an electrodeposition cell and an exhaust fan, wherein the first liquid storage tank is used for storing the copper-containing hydrochloric acid waste liquid; the stirring reactor is used for carrying out replacement reaction between ferrum and copper chloride; the filter is used for filtering a solution obtained through the replacement reaction; the chlorine absorption tank is used for enabling the solution filtered by the filter to absorb chlorine, so that ferrous chloride is oxidized into ferric trichloride; the caustic soda liquid absorption tower is used for treating tail gas emitted from the chlorine adsorption tank; the solution adjusting tank is used for adjusting the concentration of a solution in the electrodeposition cell; the electrodeposition cell is used for an electrodeposition reaction; and the exhaust fan is used for conveying chlorine gas produced by the electrodeposition cell to the chlorine absorption tank. According to the method and the system provided by the invention, replacement of copper ions from ferrous powder is combined with the electrodeposited copper, so that the wastewater discharge problem of the copper-containing hydrochloric acid waste liquid and the pollution problem of the chlorine gas to the environment can be solved, and the phenomenon that the power consumption sharply rises is avoided.

There is described a method and a system for evaluating damage of a plurality of cells in an electrolyser. The method comprises acquiring a voltage for each one of the cells; comparing the voltage to at least two threshold voltage levels; classifying the cells as one of: severely damaged cells, non-severely damaged cells and undamaged cells, based on the comparison of the voltage with the at least two threshold voltage levels; and deactivating the cells classified as severely damaged cells from the electrolyser.

The invention discloses a sacrificial anode for deep sea environment. The sacrificial anode comprises main components by weight percent: 3.0-5.0% of zinc, 0.01-0.02% of indium, 0.10-0.20% of silicon and less than or equal to 0.16% of impurities, wherein the impurities comprise less than or equal to 0.13% of iron, less than or equal to 0.006% of copper and the balance of aluminum. The sacrificial anode has the working potential of -1.12 to -1.05V, the current efficiency of more than or equal to 93% and the capacitance of more than or equal to 2600 in the deep sea environment, and is even in corrosion, and corrosion products can easily fall off. The sacrificial anode has higher actual capacitance and current efficiency in the environment of low temperature and low dissolved oxygen, has the working potential of -1.12 to -1.05V, the current efficiency of more than or equal to 93% and the capacitance of more than or equal to 2600, and is even in corrosion. Furthermore, the sacrificial anode for the deep sea environment is low in indium content, effectively reduces the anode cost, and is especially suitable for cathode protection of ocean structure in the deep sea environment, thus the sacrificial anode has high performance.

A process for preparing boron hydride from the metaborate by electrolytic method features that catalytically hdyrolzying alkali-metal boron hydride to generate hydrogen and metaborate as by-product, and electrolyzing the metaborate to generate boron hydride again, forming a cycle. The boron hydride used as hydrogen source of fuel battery features high electrochemical speed, long charge-discharge life, and low cost.

The invention relates to an electrolyzed nickel plating device and method for producing a semiconductor device. The invention aims at providing an electrolyzed nickel plating device which can restrain passivation on the surface of nickel anode, prevent reduction of current efficiency and film forming speed, provide stable nickel plating for improving quality and maintain stable output. The electrolyzed nickel plating device is provided with the nickel (Ni) anode with the average grain size of 10 um or less.

The present invention provides an electrolytic synthesis method of nitrogen trifluoride, comprising electrolytically synthesizing nitrogen trifluoride gas from ammonium fluoride in an ammonium fluoride-containing molten salt mixture using a carbonaceous electrode as an anode, wherein the method comprises: a step of dissolving, in the molten salt mixture, metal ions capable of electrolytically yielding a highly oxidized metal fluoride through reaction with fluorine radicals (F.) that are generated upon the discharge of fluoride ions which are a component of the ammonium fluoride, thereby reacting the metal ions with the fluorine radicals (F.) to yield the highly oxidized metal fluoride, and reacting the highly oxidized metal fluoride with ammonium ions on a surface of the electrode and in a solution to synthesize nitrogen trifluoride gas.

The invention discloses a tube type waste water treatment device and a waste water treatment method. The tube type waste water treatment device comprises a regulating pond, a first water pump, an ultrasonic generator, a tube type ultrasonic reactor, a tube type electric tractor, a middle water tank, a second water tank, an ejector and a tube type micro filter membrane. Due to the fact that power ultrasonic treatment, ultraviolet light catalysis, induced electricity fenton, heterogeneous catalytic oxidation and other advanced oxidization technologies are effectively integrated, a superimposed effect is formed, the defects that conventional reaction current is low in efficiency, electrode plates are prone to passivation, consumption of the electrode plates is too fast, and the electrode plates cannot be easily replaced are avoided at the same time, all units are designed into a tube type structure as mush as possible in whole scheme design, and therefore the whole device can be small, modularized and intelligent.

A process for preparing boron hydride from the metaborate by electrolytic method features that catalytically hdyrolzying alkali-metal boron hydride to generate hydrogen and metaborate as by-product, and electrolyzing the metaborate to generate boron hydride again, forming a cycle. The boron hydride used as hydrogen source of fuel battery features high electrochemical speed, long charge-discharge life, and low cost.

The invention relates to a method for operating an organic light emitting component ( 1 ), in particular organic light emitting diode (OLED), and an organic light emitting component ( 1 ) with an organic layer ( 1 c) comprising a plurality of different emitter materials, which emit light of different colours, and an electrode arrangement ( 1 a , 1 b) for applying electric control pulses to the organic layer ( 1 c), the method having the following steps: operating the organic light emitting component ( 1 ) with the help of the electric control pulses in a pulsed operating mode with an operating frequency of at least about 25 Hz; at least partially compensating an ageing induced varying colour change of the light emitted from the organic layer ( 1 c) during the course of the pulsed operation by recording at least one operating parameter characterizing the running pulsed operation of the organic light emitting component ( 1 ) and for which a dependence relationship to the ageing induced varying colour change is known at least approximately, and by adjusting a pulse height of the electrical control pulses according to the at least one recorded operating parameter and the ageing induced varying colour change; and regulating a predetermined luminance of the light emitted from the organic layer ( 1 c) during the course of the pulsed operation by adjusting a pulse length of the electric control pulses for regulating the predetermined luminance of the light emitted from the organic layer ( 1 c).