8results about How to "Easy to dope" patented technology

The application provides a sodium ion battery negative electrode material and a preparation method thereof. The preparation method of the sodium ion battery negative electrode material comprises the following steps: obtaining a coal-based raw material; performing a defect operation on the coal-based raw material, so that the coal-based raw material is oxidized and crosslinked to obtain a pre-oxidized coal-based negative electrode material; performing a hot extraction treatment on the pre-oxidized coal-based negative electrode material to remove organic impurities in the pre-oxidized coal-based negative electrode material; and performing a high-temperature doping operation on the pre-oxidized coal-based negative electrode material after the hot extraction treatment to obtain the sodium ion battery negative electrode material. The preparation method of the sodium ion battery negative electrode material can effectively change the disorder degree of the microstructure, increase the interlayer spacing of the coal-based raw material, and further effectively improve the reversible specific capacity and the cycle performance.

This invention provides a perovskite solar cell and its fabrication method. The fabrication method of the perovskite solar cell includes the following steps: forming a first electrode layer on one side surface of a substrate; and forming NiO on one side surface of the first electrode layer using a magnetron sputtering process. x The layer uses a nickel oxide target. During magnetron sputtering, oxygen is introduced into the magnetron sputtering chamber at a flow rate of 4.5 sccm to 15 sccm and a temperature of 100°C to 140°C. The aforementioned NiO... x The layer preparation method facilitates the doping of oxygen molecules into the nickel oxide film, thus achieving the desired oxygen doping level without the need for excessive oxygen introduction, and enabling precise control of NiO. x The oxygen content of the layer; the low oxygen content in the magnetron sputtering chamber can prevent NiO. x Excessive oxygen doping in the NiO layer ensures the photoelectric conversion efficiency of the perovskite solar cell; the aforementioned NiO x The layer preparation method also improves the uniformity of oxygen distribution within the magnetron sputtering chamber, thereby enhancing the NiO content. x The uniformity of oxygen doping in the layer improves the performance uniformity of perovskite solar cells.

The invention discloses a nanoscale positive electrode material precursor as well as a preparation method and application thereof. A spray pyrolysis device is adopted for preparing the nanoscale all-solid-state battery positive electrode material, the spray pyrolysis device comprises a pyrolysis furnace, a spray head is arranged at the top of a hearth of the pyrolysis furnace, and a product outlet is formed in the bottom of the pyrolysis furnace; the pyrolyzing furnace is divided into an upper temperature area, a middle temperature area and a lower temperature area which are independently controlled in temperature from top to bottom; the preparation method comprises the following steps that a mixed metal salt solution is sprayed through a spray head, atomized liquid drops enter a pyrolyzing furnace to be subjected to spray pyrolysis, and the temperature of an upper temperature area is controlled to be t1lt; the temperature of the medium-temperature area is t2lt; the temperature of the lower temperature zone is t3, and obtaining the nanoscale positive electrode material precursor after spray pyrolysis. When the positive electrode material prepared from the nanoscale positive electrode material precursor is applied to a solid-state battery, the contact property of a positive electrode and a solid-state electrolyte can be improved, the conductivity and the lithium ion transmission rate are greatly improved, and the performance of the solid-state battery is improved.

A dual-layer optical encryption fluorescent polymer waveguide chip based on optical pulse code modulation technology belongs to the field of functional photonic chip technology. It consists of a substrate layer, a buffer layer, a cladding layer, a bottom waveguide layer, and a top waveguide layer. The cladding layer is divided into three parts: a lower cladding layer, a middle cladding layer, and an upper cladding layer. The bottom waveguide is located within the middle cladding layer, and the top waveguide is located within the upper cladding layer. The bottom and top waveguides do not overlap in the chip's top-view plane. The waveguide layer material is obtained by doping fluorescent small-molecule oligomer chromophores into a polymer material. This invention achieves signal optical pulse coding by modulating the pump light power intensity. By detecting changes in optical transmission loss in the fiber optic system, it determines whether eavesdropping has occurred. Eavesdropping is indicated by optical transmission loss exceeding a threshold. False information is displayed in the bottom waveguide for disguise, while the modulated information is transmitted encrypted through the top waveguide, thus solving the problems of limited controllability and insufficient security in traditional encryption technologies.

The present disclosure provides a method for preparing a GaN-based light-emitting diode epitaxial wafer and an epitaxial wafer, belonging to the field of optoelectronic manufacturing technology. The method for preparing the GaN-based light-emitting diode epitaxial wafer includes: providing a substrate; epitaxially growing an n-type GaN layer on the substrate; epitaxially growing a multi-quantum well layer on the n-type GaN layer; intermittently introducing a Mg source into the reaction chamber in a pulsed manner to form a pretreatment layer on the multi-quantum well layer, wherein the pretreatment layer is a Mg metal layer; and epitaxially growing a p-type GaN layer on the pretreatment layer. The embodiments of the present disclosure can improve the problem of low doping concentration due to the memory effect of Mg when doping Mg in the p-type GaN layer, thereby improving the luminous efficiency of the light-emitting diode chip.

The application discloses a ferrous sulfide composite catalyst and a preparation method thereof. The ferrous sulfide composite catalyst comprises a nitrogen-doped carbon layer, and ferrous sulfide nanoparticles are loaded on the nitrogen-doped carbon layer. The preparation method comprises the following steps: mixing iron chloride and ethanol, adding thiourea and o-phenanthroline, stirring, obtaining a precursor dispersion, mixing with melamine, stirring, drying, and obtaining a precursor powder; and calcining the precursor powder, acid washing, and obtaining the ferrous sulfide composite catalyst. The ferrous sulfide composite catalyst has the advantages of excellent catalytic activity, strong stability and the like, can effectively activate an oxidant, a system constructed by the ferrous sulfide composite catalyst can quickly generate a large amount of active species, is favorable for quickly and completely degrading refractory organic pollutants in wastewater, and has high use value and good application prospect. The preparation method also has the advantages of simple process, convenient operation, low cost and the like, and can realize large-scale production and be favorable for industrial application.

The application discloses a kind of preparation device of biomass-based hard carbon negative material, comprising: surface distortion system, high-energy surface modification system and high-temperature carbonization system.The application also provides a kind of preparation device of biomass-based hard carbon negative material for preparing biomass-based hard carbon negative material using the above preparation method and the application of biomass-based hard carbon negative material prepared by the above preparation method.The preparation device and preparation method of biomass-based hard carbon negative material of the application are based on the principle of biomass heteroatomic doping modification-high temperature pyrolysis carbonization, based on the crystal structure characteristics of hard carbon material, combined with material surface distortion-high-energy surface modification-high-temperature carbonization, which can improve production efficiency and reduce production cost while realizing the efficient preparation of biomass-based amorphous hard carbon negative material.

The invention discloses an iron-based nano-clay material with a functional element sequence and a preparation method and application thereof. The preparation method comprises the following steps: acidizing nano-clay, mixing the acidized nano-clay with ferrocene and an organic solvent to prepare a precursor, and pyrolyzing the precursor to obtain the iron-based nano-clay material with the functional element sequence. According to the preparation method disclosed by the invention, the nano-clay is acidified, ferrocene is taken as a doped iron source, and the iron-based nano-clay material which is large in specific surface area, large in number of active sites, excellent in catalytic performance and good in structural stability and is constructed by functional elements can be prepared through pyrolysis; when the persulfate catalyst is used for treating emerging pollutant wastewater, emerging pollutants can be effectively degraded, pH interference is small, catalytic efficiency can be achieved under the very wide pH condition, and the persulfate catalyst has the advantages of being simple in process, convenient to operate, low in cost, high in treatment efficiency, good in degradation effect and the like, and has wide application prospects. The method has important significance for effectively removing emerging pollutants in the environment.