14results about How to "Improve battery efficiency" patented technology

The present application relates to the fields of gene therapy and molecular biology. More specifically, the present invention relates to a method for producing a modified adeno-associated virus (AAV) capsid and to a modified AAV capsid produced by said method, as well as to an isolated nucleic acid encoding said modified capsid and a vector based on recombinant adeno-associated virus for delivering a heterologous nucleic acid sequence to a subject, which includes said modified capsid.

This invention belongs to the field of back-contact battery technology, specifically relating to a back-contact battery and its battery assembly with a specific front-side structure. This specific front-side structure includes a tunneling oxide layer and a specifically doped amorphous silicon layer sequentially disposed on the front side of a silicon substrate. Within the specifically doped amorphous silicon layer, a low-doped amorphous silicon layer, a high-doped amorphous silicon layer, and an oxygen-doped amorphous silicon layer are sequentially disposed along the direction away from the tunneling oxide layer. The specifically doped amorphous silicon layer is doped with phosphorus (P) and contains hydrogen (H). The P doping concentration C1 in the low-doped amorphous silicon layer and the P doping concentration C3 in the oxygen-doped amorphous silicon layer are both lower than the P doping concentration C2 in the high-doped amorphous silicon layer. This specific front-side structure enables the back-contact battery to achieve an absorption rate exceeding 85% for incident light within 400 nm. The back-contact battery of this invention maintains good performance even after long-term exposure to ultraviolet light, improving the battery's UV reliability while achieving high transmittance and high battery efficiency.

The invention discloses a perovskite precursor solution, a perovskite active layer prepared from the perovskite precursor solution and application of the perovskite active layer. The perovskite precursor solution contains a mixture of formamidine thiocyanate (FASCN) and rubidium thiocyanate (RbSCN). According to the invention, the mixed additives formamidine thiocyanate FASCN and rubidium thiocyanate RbSCN are added into the precursor solution to effectively promote phase transformation from an inactive phase delta to an active phase alpha, so that the efficiency and the stability of the methylamine-free perovskite battery are remarkably improved, and the methylamine-free perovskite battery has a relatively good commercial application prospect.

This application discloses a solar cell and a photovoltaic module, relating to the field of photovoltaic technology. The solar cell includes a cell substrate and grid lines disposed on the cell substrate. The cell substrate includes a silicon substrate, a doped polycrystalline silicon layer, and a passivation layer, which are stacked. Grid line grooves are formed on the passivation layer, with the bottom of the grid line grooves exposing the doped polycrystalline silicon layer. At least a portion of the edge of the passivation layer adjacent to the grid line groove is warped away from the doped polycrystalline silicon layer to form a warped portion. The grid lines cover and fill the grid line grooves. In the solar cell of this application embodiment, the warped edge of the passivation layer forms a warped portion. On the one hand, this widens the bottom area of ​​the grid line groove, which helps to reduce the contact resistance between the grid lines and the doped polycrystalline silicon layer; on the other hand, it can improve the bonding strength between the grid lines and the cell substrate, reducing the risk of grid line detachment.

The present application belongs to the technical field of solar cells, and relates to a heterojunction solar cell, which comprises, from a light-facing side to a back light-facing side, a first electrode, a first conductive film layer, an N-type semiconductor film layer, an intrinsic film layer, a semiconductor substrate, a tunneling oxide layer, a P-type carbon-doped semiconductor film layer, a high-concentration P-type doped semiconductor film layer, a second conductive film layer, and a second electrode; the first conductive film layer fully covers the N-type semiconductor film layer, and the first electrode is electrically connected to the N-type semiconductor film layer through the first conductive film layer; the second conductive film layer fully covers the high-concentration P-type doped semiconductor film layer, and the second electrode is electrically connected to the high-concentration P-type doped semiconductor film layer through the second conductive film layer. The present application aims to provide a heterojunction solar cell, which can improve the electrical power loss caused by the carrier transmission on the back of the cell and improve the cell efficiency.

The invention discloses an alkali polishing additive for silicon wafers. The alkali polishing additive comprises organic amine, a complexing dispersant, inorganic salt and a surfactant. The organic amine is one or more of dichloroaniline, diethanol amine and dimethylamine, and the organic amine is 1-5 parts. The complexing dispersant is one or more of sodium benzoate, sodium alginate and sodium citrate, and the complexing dispersant is 3-8 parts. The inorganic salt is one or more of sodium sulfate, lauryl sodium sulfate, sodium pyrosulfate and sodium tartrate, and the inorganic salt is 1-5 parts. The surfactant is one or more of dodecyl dimethyl betaine, sodium alkyl naphthalene sulfonate and alkyl glycoside, and the amount of the surfactant is 5-8 parts; the additive also comprises deionized water; according to the silicon wafer alkali polishing additive, the organic amine is added, the back polishing effect of the same tower footing is obtained under the condition of low weight loss, the battery efficiency is improved, meanwhile, the additive synthesis device can stir and dissolve all the raw materials evenly, and the alkali polishing additive is obtained.

This application relates to the photovoltaic field, providing a solar cell, a photovoltaic module, and a method for fabricating a solar cell. The solar cell includes: a substrate having a front side and a back side, the back side including a textured region and a flat region adjacent to the textured region, the textured region having a doped surface field, and the doped surface field containing a doped element, which is N-type or P-type; a tunneling dielectric layer located on the flat region of the back side of the substrate; a doped conductive layer located on the surface of the tunneling dielectric layer away from the back side of the substrate, the doped conductive layer containing a doped element, the type of which is the same as the type of which is doped in the doped surface field; and a back electrode, a portion of the bottom surface of the back electrode located within the doped conductive layer and in contact with the doped surface field, which can at least reduce the contact resistance of the solar cell.

This invention provides a back-contact solar cell, its fabrication method, and its application, relating to the field of photovoltaic technology. Specifically, the back side of the back-contact solar cell of this invention includes n... + Back contact area, and the n + The back contact region includes a gradient-doped antimony layer and a molybdenum dioxide buffer layer. Compared with the p-doped traditional BC battery, this invention achieves significant improvements in minority carrier lifetime, contact resistance, and battery efficiency. Furthermore, by combining gradient antimony doping with the molybdenum dioxide buffer layer, it breaks through the efficiency-cost balance of BC batteries, reducing mass production costs and modification expenses, thus exhibiting excellent photovoltaic performance and practical value.

The invention belongs to the technical field of photoelectric materials, and particularly relates to a perovskite solar cell and a preparation method and application thereof. The perovskite solar cell comprises a metal substrate layer, a nickel mesh microcavity layer, an electron transport layer, a perovskite layer, a hole transport layer and an electrode layer which are sequentially stacked, grooves are distributed in the surface of the nickel net microcavity layer. The perovskite solar cell has the beneficial effects that the nickel net microcavity layer is deposited on the surface of the metal substrate layer to form a macroporous-mesoporous multi-scale structure, so that the wettability of the metal substrate layer to a perovskite precursor solution and the interface bonding performance of a perovskite thin film are improved; therefore, the perovskite solar cell has better stability and cell efficiency.

This invention provides a perovskite precursor solution, a perovskite solar cell, a photovoltaic energy storage system, a preparation method, and applications, including Cs. 0.05 FA 0.95 PbI3 and 2-thiopheneformyl chloride. Based on the passivation modification of the perovskite layer by 2-thiopheneformyl chloride, with the increase of the number of perovskite solar cells and aqueous vanadium-based zinc-ion cells in the photovoltaic energy storage system, not only can the cell efficiency of the perovskite solar cells be further improved, but the charging efficiency of the perovskite solar cells for aqueous vanadium-based zinc-ion cells can also be improved, ultimately resulting in a significant increase in the total energy conversion efficiency of the photovoltaic energy storage system.

The present disclosure relates to a negative electrode active material for a rechargeable lithium battery, a negative electrode for a rechargeable lithium battery including the negative electrode active material, and a rechargeable lithium battery including the negative electrode. The negative electrode active material includes spherical graphite and an amorphous carbon layer around (e.g., surrounding) the spherical graphite, and the negative electrode active material has a volume ratio of 3% or less and an orientation ratio of 90 or less, the volume ratio being a volume ratio of a total volume of pores having a diameter of 100 nm to 1000 nm to a total pore volume.

This invention discloses a solar cell and its fabrication method, belonging to the field of solar cell technology. In this solar cell, a first intrinsic silicon layer, a first doped silicon layer, a first transparent conductive layer, and a first metal electrode are sequentially disposed on the front side of a silicon substrate; a second intrinsic silicon layer, a second doped silicon layer, a second transparent conductive layer, and a second metal electrode are sequentially disposed on the back side of the silicon substrate; wherein, the back side of the silicon substrate has a pyramidal textured structure with a height of h1, and a boron-doped diffusion layer is disposed from the apex to the bottom of the pyramidal textured structure, within a depth range from a position of h2 to a depth of h2+d; h1>h2+d. By setting an intermittent boron-doped diffusion layer on the back side of the solar cell, it can serve as a P+ emitter, thereby increasing the adsorption force of holes on the back side, reducing recombination, and thus improving the cell efficiency.

The application provides a diaphragm for a vanadium redox flow battery and a preparation method thereof, and solves the problems of high vanadium ion permeation rate and high price of the current diaphragm Nafion117 membrane of the vanadium redox flow battery. First, polyether ether ketone particles are completely dissolved in concentrated sulfuric acid to make the two react and generate sulfonated polyether ether ketone, and in the process, the sulfonation degree of the sulfonated polyether ether ketone is controlled by changing the reaction time and the reaction temperature; then the obtained solution is poured into a container containing a large amount of ice water mixture, and stirring is continuously carried out during pouring; after standing, the obtained precipitate is washed to neutral, filtered and dried to obtain the sulfonated polyether ether ketone; and then the obtained sulfonated polyether ether ketone is dissolved in a DMF solution, spin-coated into a film, dried, shaped and peeled to obtain the diaphragm.

The invention relates to a perovskite cell containing a self-assembled monomolecular material, the perovskite cell comprises a hole transport layer, a perovskite layer and an electron transport layer, the perovskite layer generates free electrons and holes in an optical excitation state, the free electrons enter the electron transport layer, the holes enter the hole transport layer, the hole transport layer contains the self-assembled monomolecular material, and the self-assembled monomolecular material contains the hole transport layer. The structural formula of the self-assembled monomolecular material is shown in the specification. In the formula, R1 is selected from-CnH2nSO3H,-CnH2nPO3H2 and-CnH2nCOOH, and n is more than or equal to 0 and less than or equal to 3; r2 is selected from-CmH2m + 1,-CmH2mSO3H,-CmH2mPO3H2 and-CmH2mCOOH, and m is larger than or equal to 0 and smaller than or equal to 5. The cell adopts thienyl SAM molecules as a hole transport material, so that the perovskite crystal grains realize preferred growth, the carrier transport efficiency is improved, and the efficiency of the perovskite cell is improved.