1123results about How to "Improve passivation effect" patented technology

A method for forming a nitrogen-containing oxide thin film by using plasma enhanced atomic layer deposition is provided. In the method, the nitrogen-containing oxide thin film is deposited by supplying a metal source compound and oxygen gas into a reactor in a cyclic fashion with sequential alternating pulses of the metal source compound and the oxygen gas, wherein the oxygen gas is activated into plasma in synchronization of the pulsing thereof, and a nitrogen source gas is further sequentially pulsed into the reactor and activated into plasma over the substrate in synchronization with the pulsing thereof. According to the method, a dense nitrogen-containing oxide thin film can be deposited at a high rate, and a trace of nitrogen atoms can be incorporated in situ into the nitrogen-containing oxide thin film, thereby increasing the breakdown voltage of the film.

The invention relates to a soil improvement technology and an environment protection technology and particularly discloses a biochar mixing type protected horticultural vegetable field soil heavy metal passivant and a preparation method thereof. The soil heavy metal passivant comprises the following components in percentage by weight: 50 to 60 percent of biochar, 5 to 10 percent of medical stone powder, 5 to 10 percent of diatomite powder, 10 to 20 percent of lignite and 10 to 20 percent of coal ash. The preparation method for the soil heavy metal passivant comprises the following steps of: mixing the medical stone powder which is screened by an 80-mesh sieve, the diatomite powder which is screened by an 80-mesh sieve, the lignite, and the coal ash which is screened by an 80-mesh sieve, uniformly stirring, mixing with biochar which is screened by a 20-mesh sieve, fully stirring, and mixing uniformly to prepare the soil heavy metal passivant. The soil heavy metal passivant is easy to prepare; and the effects of passivating the protected horticultural vegetable field soil heavy metal, and reducing the content of recyclable heavy metal of plant in soil can be achieved under the synergistic effects of all components.

A solar cell (10) including a passivation film having a high effect for both a p region and an n region on a surface of a silicon substrate of the solar cell is provided. In the solar cell, a first passivation film made of a silicon nitride film is formed on a surface opposite to a light-receiving surface of the silicon substrate, and the first passivation film has a refractive index of not less than 2.6. Preferably, in the solar cell, a second passivation film including a silicon oxide film and / or an aluminum oxide film is formed between the silicon substrate and the first passivation film. Preferably, the solar cell is a back surface junction solar cell having a pn junction formed on the surface opposite to the light-receiving surface of the silicon substrate.

A process for treating the heavy metals in sludge, especially the Zn and Cu in city sludge features that the lime modified powdered coal ash is used to passivate the Zn and Cu in the dewatered city sludge. Its passivated rate is more than 85% for Cu and more than 70% for Zn.

The invention provides a composite repair agent for soil heavy metal pollution as well as a preparation method and application thereof, and belongs to the technical field of soil improvement and environmental protection. A composite repair agent for soil cadmium pollution is prepared from the following components in parts by weight: 10 to 30 parts of sodium bentonite, 5 to 15 parts of bone powder,5 to 25 parts of chitosan, 5 to 30 parts of oyster shell powder, 10 to 40 parts of graphene-modified crop straw biochar, 10 to 30 parts of bio-organic fertilizer, 15 to 45 parts of sodium silicate, 1to 15 parts of nano-FeO, 1 to 8 parts of carbon nanotubes, and 1 to 10 parts of microbial inoculants. The number of each 10 mg colonies of rhodotorula mucilaginosa OP11 in the microbial inoculum is 2.25*10 <8> to 2.5*10<9> CFU; the preservation number of the rhodotorula mucilaginosa OP11 is CGMCC No. 13540. The application of the composite repair agent is in remediation of heavy metal contaminated soil.

The invention relates to a method for preparing a colorful film for protecting a solar cell thin grid line metal electrode by adopting a mask. In the method, after a solar cell is prepared, a mask is utilized to cover a main grid line metal electrode on the front surface of the solar cell, a film is coated on the area which is not covered by the mask for the second time, and a dielectric layer for protecting the thin grid line metal electrode is prepared to form a structure comprising the dielectric layer, the thin grid line metal electrode and a passivation layer. The method can protect the thin grid line metal electrode against easy oxidation, and the main grid line metal electrode can be normally connected by welding rods. The passivation effect of the front surface can be enhanced through optimizing the passivation layer; the reflectivity of the front surface of the solar cell can be reduced and color regulation can be realized through regulating the dielectric layer; and characters, figures, graphics and the like can be displayed on the front surface of the solar cell through changing a mask pattern. In addition, the secondary film coating method is convenient to be in butt joint with the traditional crystalline silicon solar cell preparation process and is easy for industrialization.

The invention discloses a composite passivated anti-reflection film used for a crystalline silicon solar battery and a preparation method thereof. The composite passivated anti-reflection film consists of a silicon oxide (SiO2) layer, an amorphous alumina (a-Al2O3) layer and an amorphous silicon nitride (a-Si1-xNx) layer which are arranged on the emitter on a light receiving surface of the crystalline silicon solar battery in turn. The preparation method comprises the following steps of: preparing an a-Al2O3 layer on the emitter on the light receiving surface of the crystalline silicon solar battery by a plasma enhanced chemical vapor deposition (PECVD) process or an atomic layer deposition (ALD) process; forming the SiO2 layer between the emitter layer and the a-Al2O3 layer by an annealing process; and preparing the a-Si1-xNx layer on the a-Al2O3 layer by the PECVD process. The composite passivated anti-reflection film has the advantages that: the a-Si1-xNx anti-reflection film has a good anti-reflection effect; the a-Al2O3 / SiO2 composite passivated film has double effects of chemical passivation and field passivation and has a good passivation effect; the a-Si1-xNx / a-Al2O3 / Si2O composite passivated anti-reflection film has high thermal stability and is compatible with a subsequent battery preparation process; and the anti-ultraviolet (UV) performance is high.

The invention discloses a gradient doped silicon-based heterojunction solar cell and a preparation method thereof. A plurality of layers of amorphous silicon membranes of which the doped concentration is increased sequentially are deposited on the surface of crystalline silicon serving as a substrate, and a transparent conductive film with a certain thickness is deposited and an electrode is prepared to prepare the gradient doped silicon-based heterojunction solar cell, wherein the amorphous silicon membranes contact the crystalline silicon to achieve a good passivating effect and obtain highopen-circuit voltage; a plurality of gradient doped amorphous silicon layers can form a strong inner electric field to reduce the composite loss of photo-induced carriers, improve the collection rateof minority carriers and increase short-circuit current; and the doped concentration of the doped amorphous silicon layers contacting the electrode is high, the resistivity is low, and contact resistance between the doped amorphous silicon layers and the electrode can be reduced to improve filling factors of the solar cell. Therefore compared with the conventional silicon-based heterojunction solar cell, the gradient doped silicon-based heterojunction solar cell has high photoelectric conversion efficiency.

The invention relates to a crystalline silicon solar cell with low series resistor, which comprises a p-n node; a passivation layer, a thin grating metal electrode and a main grating metal electrode are arranged on the front surface of the p-n node, and a back electric field and a back electrode are arranged on the back surface of the p-n node; the thin grating metal electrode, the main grating metal electrode, the back electric field and the back electrode are communicated with the p-n node; and a transparent conducting film is arranged on the full or partial area of the front surface of the crystalline silicon solar cell. The solar cell has a structure having the transparent conducting film, the metal electrodes and the passivation layer, wherein the transparent conducting film can be used for connecting breaking gates so as to reduce the power loss of the breaking gates; the film can reduce the series resistor on the front surface of the cell and enhance the conducting capability of the cell; simultaneously, the crystalline silicon solar cell can play a role in protecting the metal electrode on the front surface of the cell and prevent the metal electrode from oxidizing; and the reflectivity and the color of the crystalline silicon solar cell can be further controlled by adjusting and controlling the transparent conducting film. The invention further discloses a preparation method of the crystalline silicon solar cell.

The invention discloses a novel passivated perovskite solar cell and a preparation method thereof. The perovskite solar cell optimizes the absorption of perovskite, so that a perovskite absorption layer contains an anti-solvent tris(pentafluorophenyl)borane to serve as a novel additive. On one hand, the addition of fluoride ions can change the crystallinity and the defect state of a perovskite film to form a high-quality perovskite film with a large grain size; the anti-solvent tris(pentafluorophenyl)borane can enhance the surface appearance of the perovskite and plays a passivation function at the grain boundary; and on the other hand, the fluoride ions can improve the hydrophobicity of the perovskite film and inhibit the phase change of the perovskite to better protect the perovskite from being destroyed by water, thereby further improving the air stability and the light stability of the cell to obtain a high-efficiency perovskite solar cell.