1137 results about "Te element" patented technology

A low temperature chemical route to efficiently produce nanomaterials is described. The nanomaterials are synthesized by intercalating ions into layered compounds, exfoliating to create individual layers and then sonicating to produce nanotubes, nanorods, nanoscrolls and / or nanosheets. It is applicable to various different layered inorganic compounds (for example, bismuth selenides / tellurides, graphite, and other metal complexes, particularly transition metal dichalcogenides compounds including oxygen, sulfur, tellurium or selenium).

The present invention provides a thick-film paste for printing the front side of a solar cell device having one or more insulating layers. The thick-film paste comprises an electrically conductive metal and a lead-tellurium-boron-oxide dispersed in an organic medium.

A storage cell, integrated circuit (IC) chip with one or more storage cells that may be in an array of the storage cells and a method of forming the storage cell and IC. Each storage cell includes a stylus, the tip of which is phase change material. The phase change tip may be sandwiched between an electrode and conductive material, e.g., titanium nitride (TiN), tantalum nitride (TaN) or n-type semiconductor. The phase change layer may be a chalcogenide and in particular a germanium (Ge), antimony (Sb), tellurium (Te) (GST) layer.

Methods of fabricating a thin film. An example method includes forming a GeSbTe thin film on a surface of a substrate by chemically reacting a first precursor including germanium (Ge), a second precursor including antimony (Sb), and a third precursor including tellurium (Te) in a reaction chamber and processing the surface of the GeSbTe thin film with hydrogen plasma. Another example method includes injecting at least one precursor into a reactor chamber and depositing the at least one precursor onto a substrate within the reactor chamber using a chemical vapor deposition process so as to form the thin film.

Antimony, germanium and tellurium precursors useful for CVD / ALD of corresponding metal-containing thin films are described, along with compositions including such precursors, methods of making such precursors, and films and microelectronic device products manufactured using such precursors, as well as corresponding manufacturing methods. The precursors of the invention are useful for forming germanium-antimony-tellurium (GST) films and microelectronic device products, such as phase change memory devices, including such films.

A low softening point glass composition, which is substantially free from lead, bismuth and antimony and comprises oxides of vanadium, phosphorous, tellurium and iron, a softening point of the composition being 380° C. or lower.

Germanium, tellurium, and / or antimony precursors are usefully employed to form germanium-, tellurium- and / or antimony-containing films, such as films of GeTe, GST, and thermoelectric germanium-containing films. Processes for using these precursors to form amorphous films are also described. Further described is the use of [{nBuC(iPrN)2}2Ge] or Ge butyl amidinate to form GeTe smooth amorphous films for phase change memory applications.

A system and method for forming a phase change memory material on a substrate, in which the substrate is contacted with precursors for a phase change memory chalcogenide alloy under conditions producing deposition of the chalcogenide alloy on the substrate, at temperature below 350° C. with the contacting being carried out via chemical vapor deposition or atomic layer deposition. Various tellurium, germanium and germanium-tellurium precursors are described, which are useful for forming GST phase change memory films on substrates.

A method of forming a multifunction solar cell including an upper subcell, a middle subcell, and a lower subcell, the method including: providing a substrate for the epitaxial growth of semiconductor material; forming a first solar subcell on the substrate having a first band gap; forming a second solar subcell over the first solar subcell having a second band gap smaller than the first band gap; forming a graded interlayer over the second subcell using a non-isoelectronic surfactant such as selenium or tellurium, the graded interlayer having a third band gap greater than the second band gap; and forming a third solar subcell over the graded interlayer having a fourth band gap smaller than the second band gap such that the third subcell is lattice mismatched with respect to the second subcell.

The present invention provides a chemical-mechanical polishing (CMP) composition suitable for polishing a substrate comprising a phase change alloy (PCA), such as a germanium-antimony-tellurium (GST) alloy. The composition comprises not more than about 6 percent by weight of a particulate abrasive material in combination with an optional oxidizing agent, at least one chelating agent, and an aqueous carrier therefor. The chelating agent comprises a compound or combination of compounds capable of chelating a phase change alloy or component thereof (e.g., germanium, indium, antimony and / or tellurium species) that is present in the substrate, or chelating a substance that is formed from the PCA during polishing of the substrate with the CMP composition. A CMP method for polishing a phase change alloy-containing substrate utilizing the composition is also disclosed.

An all dry method for producing solar cells is provided comprising first heat-annealing a II-VI semiconductor; enhancing the conductivity and grain size of the annealed layer; modifying the surface and depositing a tellurium layer onto the enhanced layer; and then depositing copper onto the tellurium layer so as to produce a copper tellurium compound on the layer.

The capability of retaining a resistance value of a stored state and an erased state is improved in a resistance variation-type memory device. A memory layer 5 including a high-resistance layer 2 and an ion source layer 3 is provided between a lower electrode 1 and an upper electrode 4. The ion source layer 3 contains Al (aluminum) as an additive element together with an ion conductive material such as S (sulfur), Se (selenium), and Te (tellurium) (chalcogenide element) and a metal element to be ionized such as Zr (zirconium). Since Al is included in the ion source layer 3, the high-resistance layer which includes Al (Al oxide) is formed on an anode in erasing operation. Thus, a retaining property in a high-resistance state improves, and at the same time, an operating speed is improved.

A phase changeable material layer usable in a semiconductor memory device and a method of forming the same are disclosed. The method includes forming a plasma in a chamber having a substrate disposed therein, providing a first source gas including a germanium based material to form a first layer including the germanium based material on the substrate while maintaining the plasma in the chamber, providing a second source gas including a tellurium based material to react with the first layer to form a first composite material layer including a germanium-tellurium composite material on the substrate while maintaining the plasma in the chamber, providing a third source gas including an antimony based material to form a second layer including the antimony based material on the first composite material layer while maintaining the plasma in the chamber, and providing a fourth source gas including tellurium based material to react with the second layer including antimony based material to form a second composite material layer including an antimony-tellurium composite material on the first composite material layer. Accordingly, the phase changeable material layer may be formed at a low temperature and power to have desirable electrical characteristics.

A continuous deposition process and apparatus for depositing semiconductor layers containing cadmium, tellurium or sulfur as a principal constituent on transparent substrates to form photovoltaic devices as the substrates are continuously conveyed through the deposition apparatus is described. The film deposition process for a photovoltaic device having an n-type window layer and three p-type absorber layers in contiguous contact is carried out by a modular continuous deposition apparatus which has a plurality of processing stations connected in series for depositing successive layers of semiconductor films onto continuously conveying substrates. The fabrication starts by providing an optically transparent substrate coated with a transparent conductive oxide layer, onto which an n-type window layer formed of CdS or CdZnS is sputter deposited. After the window layer is deposited, a first absorber layer is deposited thereon by sputter deposition. Thereafter, a second absorber layer formed of CdTe is deposited onto the first absorber layer by a novel vapor deposition process in which the CdTe film forming vapor is generated by sublimation of a CdTe source material. After the second absorber layer is deposited, a third absorber layer formed of CdHgTe is deposited thereon by sputter deposition. The substrates are continuously conveyed through the modular continuous deposition apparatus as successive layers of semiconductor films are deposited thereon.

The invention relates to a method for separating tellurium from tellurium slag, which comprises the following steps: firstly, grinding the tellurium slag, leaching out the obtained product in an aqueous solution, purifying and neutralizing a water leaching solution, and producing tellurium dioxide; secondly, performing hydrochloric acid leaching on water leaching residue in a hydrochloric acid system, cooling and filtering an acid leaching solution, and returning acid leaching residue to an anode sludge treatment process; thirdly, performing controlled potential reduction on the acid leaching solution to produce coarse tellurium, and performing roasting and impurity removal on the coarse tellurium and the tellurium dioxide produced by neutralization to obtain pure tellurium dioxide; and fourthly, using the conventional method to reclaim valuable metals such as copper, bismuth, tin, and the like from a reduced solution respectively. The total tellurium leaching rate of the method is as high as more than 98 percent, and the produced coarse tellurium has the advantages of low content of impurity elements, small amount of return slag, small modification amplitude of equipment, short treatment time, and low treatment cost.

The invention discloses a technology for extracting tellurium from copper anode slime, which is characterized by comprising the following steps: (1) the copper anode slime is put into a sulfuric acid solution, oxygen is introduced into the sulfuric acid solution for oxidation sulfuric acid leaching; solid-liquid separation is carried out to obtain leachate containing copper and tellurium; and the leaching process being finished in a closed high-pressure device; (2) copper powder is added into the leachate to remove silver or selenium in the leachate by substitution, and the solid-liquid separation is carried out; (3) sulfur dioxide is introduced into the leachate obtained from the step (2) to precipitate the tellurium by reduction, and the solid-liquid separation is carried out to obtain crude tellurium; and (4) the crude tellurium is processed according to a conventional method to extract pure tellurium. The technology adopts one-section oxidation acid leaching to leach the copper and tellurium out, copper powder to remove the impurities of silver, selenium and the like by substitution, and sulfur dioxide to precipitate the tellurium by reduction (obtaining tellurium dioxide), and the tellurium dioxide precipitation is alkali-dissolved and then electrolyzed to obtain the tellurium, therefore, the flow is simple, the consumption of the copper powder is remarkably reduced, and the simplification of the technology is beneficial to improve the recovery ratio of the tellurium, which can achieve more than 90 percent.

The invention relates to a multilayer composite metal oxide catalyst. The multilayer composite metal oxide catalyst has the general formula as follows: Mo[a]Bi[b]Ni[c]Cs[d]Cu[e]Ti[f]A[g]B[h]C[i]O[j], wherein Mo is molybdenum, Bi is bismuth, Ni is nickel, Cs is cesium, Cu is copper, and Ti is titanium; A is at least one element selected from arsenic, tellurium, manganese, cerium, niobium, zirconium, rubidium, cadmium and germanium; B is at least one element selected from cobalt, boron, strontium, tantalum, alkali metal and alkaline earth metal; C is at least one element selected from vanadium, stannum, gallium, zinc, ferrum, tungsten and stibium; and O is oxygen. The composite metal oxide catalyst has a multilayer structure in which the concentrations of all the elements are reduced progressively from a matrix at the inner layer to the outer layer. The catalyst provided by the invention can effectively reduce the local heat accumulation of single pipe reactors and inhibit the formation of hot spots, and has the characteristics of high reactivity and selectivity and long service life.

The invention relates to a process for separating and recovering selenium from a selenium-containing material. The process comprises the following steps: dissolving the selenium-containing material into a sulfuric acid solution, adding 10% H2O2 into the mixture, filtering and separating to get leachate and residue containing silver, lead, copper and other valuable metals; separating the selenium from tellurium in the oxidation leachate by using sodium hydroxide; and acidifying the selenium leachate with hydrochloric acid, adding sodium sulfite to reduce the settled selenium, washing and drying to get crude selenium with the grade of not lower than 90%. The crude selenium which is separated by the process is higher in purity and can be directly refined, so that the process flow of recovering selenium is shortened, the recovery rate of selenium is improved, the production cost is reduced and the energy is saved; and the sodium sulfite is used for substituting sulfur dioxide to perform reduction, the control is easy and the environmental pollution is further reduced. The process has very important significance in both aspects of recovering resources and protecting an environment.

A supporting substrate 11 and a light-transmitting layer 12, and further between the light-transmitting layer and the supporting substrate 11 a dielectric layer 31, a noble metal oxide layer 23, a dielectric layer 32, a light absorption layer 22 and a dielectric layer 33 in this arranging order when viewed from the light-transmitting layer side are provided. The light absorption layer 22 contains as a main component a material that can be represented by (SbaTe1−a)1−bMAb (wherein MA is an element other than antimony (Sb) and tellurium (Te), 0<a<1 and 0≦b<1), and besides, that is different from an intermetallic compound represented by {(GeTe)c(Sb2Te3)1−c)}dMB1−d (wherein MB is an element other than antimony (Sb), tellurium (Te) and germanium (Ge), c is ⅓, ½ or ⅔, and 0<d≦1).

The present invention is a process of making a germanium-antimony-tellurium alloy film using a process selected from the group consisting of atomic layer deposition and chemical vapor deposition, wherein a silyltellurium precursor is used as a source of tellurium for the alloy film and is reacted with an alcohol during the deposition process.

An improved catalyst comprising a noble metal and tellurium at the surface of a carbon support is provided. Also provided are novel methods for preparing such catalysts and novel processes for the use of such catalysts in liquid phase oxidation reactions, particularly the oxidation of N-(phosphonomethyl)iminodiacetic acid or a salt thereof.

The invention relates to a method for extracting refined tellurium from tellurium-contained smelting slag, which is characterized in that the method comprises the following steps of: oxidizing and leaching inorganic acid, replacing noble metal with a copper plate, depositing the copper by sodium sulfide, counteracting and depositing tellurium, alkaline leaching coarse TeO2, removing impurities by Na2S, concentrating and electrowinning. The method has the advantages of high recovery rate for tellurium, comprehensive and effective recovery of other useful metals, and suitably treating the tellurium-contained waste slag with high water content and small granularity generated in the metallurgy process by a wet-method.

A particle having a core of elemental chalcogen elements, such as sulfur, selenium and tellurium, and a coating of at least one polymeric layer on the core. A functionalized conductive carbon material is dispersed in the core. A cathode containing the particles and a battery constructed with the cathode are also provided.

This invention discloses the synthesis of metal chalcogenides using chemical vapor deposition (CVD) process, atomic layer deposition (ALD) process, or wet solution process. Ligand exchange reactions of organosilyltellurium or organosilylselenium with a series of metal compounds having neucleophilic substituents generate metal chalcogenides. This chemistry is used to deposit germanium-antimony-tellurium (GeSbTe) and germanium-antimony-selenium (GeSbSe) films or other tellurium and selenium based metal compounds for phase change memory and photovoltaic devices.

A process for manufacturing a cadmium telluride based thin film photovoltaic device having an intermixed layer is provided. The process can include introducing a substrate into a deposition chamber, wherein a window layer (e.g., a cadmium sulfide layer) is on a surface of the substrate. A sulfur-containing gas can be supplied to the deposition chamber. In addition, a source vapor can be supplied to the deposition chamber, wherein the source material comprises cadmium telluride. The sulfur-containing gas and the source vapor can be present within the deposition chamber to form an intermixed layer on the window layer. In one particular embodiment, for example, the intermixed layer generally can have an increasing tellurium concentration and decreasing sulfur concentration extending away from the window layer.An apparatus for sequential deposition of an intermixed thin film layer and a sublimated source material on a photovoltaic (PV) module substrate is also provided.

A method and associated composition for chemical mechanical planarization of a chalcogenide-containing substrate (e.g., germanium / antimony / tellurium (GST)-containing substrate) are described. The composition and method afford low defect levels (e.g., scratches incurred during polishing) as well as low dishing and local erosion levels on the chalcogenide-containing substrate during CMP processing.

A phosphor and a method of deposition. The phosphor comprises a composition of the formula M'aBa1-aM''2M'''4':RE, where M' is at least one element selected from magnesium and calcium, M'' is at least one element selected from aluminum, gallium and indium, M''' is at least one element selected from sulphur, selenium and tellurium, RE is at least one rare earth element, especially europium or cerium, and 0<a<1. Deposition is preferably by dual source electron beam deposition. The phosphor may be annealed. The phosphor provides a high luminosity blue emission that does not require an optical filter to achieve acceptable colour coordinates for the blue sub-pixel element for a full colour thin film or thick film electroluminescent display. The blue sub-pixel pixel performance meets the luminosity and colour temperature specifications for current generation cathode ray tube displays.