51results about How to "Good rectification characteristics" patented technology

The invention belongs to the technical field of semiconductors and particularly relates to a ZnO/NiO heterostructure orderly multi-hole thin film and a manufacturing method thereof. A new option is provided for semiconductor materials. According to the technical scheme, the ZnO/NiO heterostructure orderly multi-hole thin film comprises a conducting substrate and a heterostructure growing on the conducting substrate, and the heterostructure is formed by a p type NiO orderly multi-hole thin film and an n type ZnO orderly multi-hole thin film which grows in sequence from bottom to top. The invention further provides a manufacturing method of the ZnO/NiO heterostructure orderly multi-hole thin film. The ZnO/NiO heterostructure orderly multi-hole thin film can be widely used in the fields such as an ultraviolet detector, a light-emitting diode and a resistance random access memory.

The invention discloses a method of preparing cadmium sulfide/silicon heterogeneity structure with white light emission, which includes steps: putting P-type single-crystal silicon sheet into autoclave filled with etching solution constituted of hydrofluoric acid and ferric nitrate water solution to corrode underlay material silicon nano pore and column array (Si-NPA); oxidizing the Si-NPA, putting the oxidized Si-NPA into cadmium salt solution for impregnating, airing in air at room temperature, putting into hydrogen sulfide air flow to carry in-situ heterogeneous chemical reaction growth under natural condition or light-induction condition, annealing at temperature of 100-700 DEG C and under protecting gas atmosphere, and then obtaining cadmium sulfide/silica heterogeneity structure with microstructure and adjustable luminescence characteristic and realizing white light emission which luminescence peak of red, green and blue light appear simultaneously. Advantages of the preparing method are: ambient operation, simple process, easy operation, 100% of repetition rate; the heterogeneity structure expresses adjustable photoelectricity property, realizes high strength white light emission, and is important material for preparing new solid illumination, micro-electronic and opto-electronic device.

The invention relates to a resistive random access memory and a method for improving a positive and negative current difference of the resistive random access memory. The resistive random access memory comprises a substrate, a first terminal electrode, a variable resistance medium layer and a second terminal electrode, wherein the first terminal electrode is arranged on the substrate and forms a good electric contact together with the substrate; the variable resistance medium layer is arranged at the left side or the upper part of the first terminal electrode; if the variable resistance medium layer is arranged at the left side of the first terminal electrode, the second terminal electrode is arranged at the left side of the variable resistance medium layer; if the variable resistance medium layer is arranged at the upper part of the first terminal electrode, the second terminal electrode is arranged at the upper part of the variable resistance medium layer; the variable resistance medium layer is a dual-layer variable resistance medium; and the dual-layer variable resistance medium is in a laminated structure formed by a first variable resistance layer and a second variable resistance layer. By plasma modification, defects are introduced into the medium or the medium surface, so that a negative current value is effectively suppressed; and the positive and negative current difference is greatly improved.

A perovskite structure lanthanum manganese oxide/zinc oxide alloplasm p-n junction and the preparation method pertains to the semiconductor material manufacturing field. The invention uses a magnetron sputtering method to prepare the perovskite structure lanthanum manganese oxide/zinc oxide alloplasm p-n junction. The structure of the p-n junction is a Si(100) single crystal chip(1) substrate, a Pt electrode layer (2), a ZnO film(3), and a LSMO film(4). The invention preparative LSMO/ZnO p-n junction not only has excellent rectification characteristic in the temperature range of 40-320K, but also has solved the problem of the existing technology that has a high use cost of PLD, and is not suitable to apply in large-scale industrial production. The perovskite structure lanthanum manganese oxide/zinc oxide alloplasm p-n junction obtained by the inventive method has good application potential in spinning electron device field.

The invention discloses a manufacturing method for a single ZnO micron wire homojunction light emitting diode. According to the manufacturing method, a simple CVD method is adopted, parameters such as growth time are controlled, a layer of highly-oriented undoped n-type ZnO micron wires grow on a substrate at first, and then a layer of Sb-doped p-type ZnO micron wires grow on the highly-oriented undoped n-type ZnO micron wires, so that the homojunction of the ZnO micron wires is manufactured; a single micron wire is stripped from the bottom of the sample substrate, and electrodes are manufactured at the two ends of the micron wire, wherein the diameter of the micron wire is 10-100 micrometers, and the length of the micron wire is 1-20mm. The manufacturing process is simple, the cost is low, and device test results show that the device has the good rectification characteristic and the higher light emitting property.

The invention discloses an organic rectifier diode, relates to the field of organic semiconductor electronic devices, and particularly relates to a composite organic rectifier diode compounded on an organic/organic p-n heterojunction interface on the basis of a charge carrier. The composite organic rectifier diode disclosed by the invention comprises a base, a bottom electrode, a p-type material layer, an n-type material layer, a charge buffer layer and a top electrode. The composite organic rectifier diode is characterized in that m-MTDATA, 2T-NATA, CuPc, TPD, NPB, TAPC, TCTA, CBP or Rubrene is used as the p-type material layer; C60 is used as the n-type material layer. The composite organic rectifier diode disclosed by the invention has the advantages that the composite organic rectifier diode is high in material selectivity, and the common p-type organic material can be selected with high flexibility; due to the complex mechanism, the rectified current can be supplied by compounding electrons and holes at the p-n heterojunction interface, and the composite organic rectifier diode is low in interface impedance and high in rectification ratio; the composite organic rectifier diode is simple in process and high in apparatus repeatability, is not doped with the p-type material and the n-type material, and is low in demands on fabrication processes and equipments of apparatuses.

The invention relates to the technical field of photosensitive materials, in particular to a TiO2 film/SiO2/p-Si heterojunction photosensitive material and a preparation method and application thereof. The photosensitive material comprises a TiO2 thin film deposited on a SiO2 oxide layer on a single crystal p-type Si substrate, the TiO2 thin film is composed of compact conical particles, and a TiO2 thin film/SiO2/p-Si heterojunction is formed at the interface of the TiO2 thin film, the SiO2 oxide layer and the Si substrate. The TiO2 thin film/SiO2/p-Si heterojunction is prepared by adopting aspray pyrolysis method, and direct-current and alternating-current electrical performance research under different illumination intensities is carried out; and an I-V curve shows that the TiO2 thin film/SiO2/p-Si heterojunction has obvious diode rectification characteristics and high-performance photoconductivity.

The invention provides a preparation method of an amorphous strontium titanate thin-film device. The preparation method comprises the following steps: spin-coating a bottom electrode solution to the surface of a substrate to be annealed to form a bottom electrode; spin-coating a strontium titanate solution to the surface of the bottom electrode to be roasted to form a strontium titanate thin film;annealing the strontium titanate thin film to form an amorphous thin film; and carrying out electron beam evaporation sputtering on the surface of the amorphous thin-film to form a top electrode so as to obtain the amorphous strontium titanate thin-film device. The greatest innovation point of the amorphous strontium titanate thin-film device provided by the invention is as follows: a main body oxide thin film layer of the device is an amorphous thin film, the preparation method is simple in process, the demand on temperature in the preparation process is relatively low, and the device can beproduced in batches; moreover, the prepared strontium titanate thin-film device is good in stability and fatigue resistant, can be recycled, and is great in switch ratio which reaches 103 during annealing at 400 DEG C, and is wide in application field.

A heterogeneous p-n junction of perovskite structured La-Mn oxide/tin oxide and a preparation process thereof belong to the material manufacturing field. At the present, a p-n junction compounded by La-Mn oxide and tin oxide does not exist. The p-n junction provided by the invention comprises a single-crystal substrate, a SnO2 layer and an LSMO layer, wherein the SnO2 layer is deposited on the single-crystal substrate, the thickness of the SnO2 layer is 100-300 nm, the LSMO layer is deposited on the SnO2 layer, and the thickness of the LSMO layer is 100-300 nm. The invention prepares the heterogeneous p-n junction of perovskite structured La-Mn oxide/tin oxide through utilizing a magnetron sputtering method to sequentially deposit the SnO2 layer and the LSMO layer on a depositing bottom. The p-n junction provided by the invention has excellent rectification characteristics, is low in cost, and is suitable for industrial production.

The invention relates to the technical field of semiconductor light-emitting devices, and discloses a fabrication method of a high-performance aluminum-doped cadmium sulfide silicon-based heterojunction light-emitting diode. The fabrication method comprises the following steps of firstly, sequentially performing initial washing and deep washing on a P-type heavily-doping single-crystal silicon wafer with acetone or ethyl alcohol and standard RCA cleaning flow; secondly, fabricating a nanometer porous silicon columnar array by a hydrothermal corrosion method; and finally, taking the nanometer porous silicon columnar array as a substrate and aluminum nitride as a doping agent, and fabricating an aluminum-doped cadmium sulfide nanometer thin film and the nanometer porous silicon columnar array by a chemical water bath method. The aluminum-doped cadmium sulfide nanometer thin film and the nanometer porous silicon columnar array are organically combined and built to a novel light-emitting diode, and the array and porous structure of the nanometer porous silicon columnar array can be fully utilized; and meanwhile, by relatively high carrier mobility of the cadmium sulfide and the nanometer porous silicon columnar array after doping, the carrier recombination efficiency can be effectively improved, and the light-emitting efficiency of the light-emitting diode is improved.

The invention discloses a graphene homogeneous p-n junction structure and a preparation method thereof. The graphene homogeneous p-n junction structure comprises a neutral graphene layer, a p-type graphene layer, an n-type graphene layer and an electrode, wherein the p-type graphene layer is arranged on the surface of one side of the neutral graphene layer, the n-type graphene layer is arranged onthe surface of the other side of the neutral graphene layer, and electrodes are arranged on the surface of the p-type graphene layer and the surface of the n-type graphene layer. According to the invention, the characteristics of the same material of graphene that the thermal expansion coefficient, the electron affinity, the band gap width and the lattice constant are the same are utilized; therefore, the complex interface problem generated by heterogeneous p-n junctions made of different materials and the problems of structural instability, low efficiency and the like of the heterogeneous p-n junctions are avoided, and meanwhile, the p-n junction structure has excellent flexibility and performance and can be used for structural design of flexible electronic devices and research and development of a high-performance miniaturized fine display technology.

The invention provides a bi-directional light control thyratron transistor chip, an optical triggering coupler and a solid-state relay. A first light control thyratron transistor section and a second light control thyratron transistor section are arranged on a surface of a semiconductor chip. Each light control thyratron transistor section has a PNPN section. The PNPN section comprises a positive electrode diffusion region in a conductive type, a substrate in another conductive type, a control electrode diffusion region in a conductive type and a negative electrode diffusion region formed in the control electrode diffusion region in another conductive type. The distance of the cut surface to the control electrode diffusion region is below 400 micrometers. Thus, a few of minority carriers generated at the first light control thyratron transistor section side during connection are collected to the cut surface at the first light control thyratron transistor section side before migration. Schottky barrier or a channel separation region cannot be formed, rectification characteristics are raised greatly, increase of the chip area can be inhibited and load is controlled through light triggering by one chip.

The invention relates to a diode based on a two-dimensional tellurene/two-dimensional electron gas heterojunction and a preparation method of the diode, and belongs to the technical field of semiconductors. Two-dimensional tellurene is transferred to the surface of a strontium titanate substrate, two-dimensional electron gas is induced on the surface of the strontium titanate substrate through argon ion beam bombardment, and the two-dimensional electron gas is in contact with the two-dimensional tellurene to form the Van der Waals heterojunction. The forward current of the two-dimensional tellurene nanowire/two-dimensional electron gas heterojunction and the forward current of the two-dimensional tellurene nanosheet/two-dimensional electron gas heterojunction are 103 times and 107 times higher than the reverse current of the two-dimensional tellurene nanowire/two-dimensional electron gas heterojunction respectively, and both the two-dimensional tellurene nanowire/two-dimensional electron gas heterojunction and the two-dimensional tellurene nanosheet/two-dimensional electron gas heterojunction have excellent diode rectification characteristics. The diode provided by the invention has very high stability, and even if the negative voltage is up to -100V, the diode cannot be broken down. The heterojunction diode is simple in structure, simple to prepare and excellent in performance, and can be widely applied to the fields of electronic chips, intelligent devices and the like.

The invention belongs to the technical field of thin film devices and in particular relates to an amorphous thin film device as well as a preparation method and application thereof. The amorphous thinfilm device provided by the invention comprises a substrate, a first electrode structure, an amorphous thin film layer and a second electrode structure, wherein the first electrode structure is arranged on the substrate; the amorphous thin film layer is arranged at one side, opposite to the substrate, of the first electrode structure; the second electrode structure is arranged at one side, opposite to the first electrode structure, of the amorphous thin film layer; the first electrode structure and the second electrode structure are in mutual contact and connection; the amorphous thin film layer is an SrFexTi1-xO3 amorphous thin film layer, wherein x is 0.05 to 0.5. The amorphous thin film device provided by the invention adopts the SrFexTi1-xO3 amorphous thin film layer; the device has obvious conductivity of a rectifying diode and the rectifying property is remarkable; the on-off ratio of the device is greater than 10<3>; when a current and voltage circulating test is carried out for 40 times, the on-off ratio nearly has no great changes and the device has a nonvolatile storage property; the current of the device only has small fluctuation along time so that the device has goodstability and fatigue resistance.