6results about How to "Lower open circuit voltage" patented technology

The utility model relates to a solar cell. The above-mentioned solar cell includes the monocrystalline silicon wafer of first doped type and the first intrinsic amorphous silicon layer and the first microcrystalline silicon layer of second doped type of laminated setting on monocrystalline silicon wafer, wherein, the first intrinsic amorphous silicon layer includes first sublayer and second sublayer, and the first sublayer is between the second sublayer and the first microcrystalline silicon layer;Second sublayer contains microcrystal, and the crystallization rate of second sublayer is 1%~5%, and the thickness of second sublayer is 1.3nm~2.5nm, and second sublayer can enhance the contact effect with the first microcrystalline silicon layer, reduce the series resistance of battery, and improve the filling factor and other performance parameters of battery.

The invention belongs to the field of batteries, and particularly relates to a positive plate, a preparation method thereof and a lithium ion battery, and the positive plate comprises a current collector, an active substance layer arranged on one side or two sides of the current collector, and a Ti3C2 film material arranged on the surface of the active substance layer. According to the technical scheme, the Ti3C2 thin film material is compounded on the surface of the active substance layer, the battery with high safety and high energy density can be achieved, the method is simple in operation, low in industrialization implementation difficulty and low in cost, and in addition, the Ti3C2 thin film material is high in surface porosity and suitable for lithium ion diffusion and electrolyte isolation.

A double-layer stacked silver antimony sulfide-based gradient film, with silver antimony sulfide (AgSbS2) as the matrix and AgIn prepared by adding indium (In) x Sb(S,Se)2 is the first layer, antimony (Sb) is added to form AgSb 1+y (S, Se)2 is the second layer, where x = 0.1~0.5, y = 0.1~0.5. The double absorption layer gradient band gap AgIn in the present invention x Sb(S,Se)2 / AgSb 1+y The (S,Se)2 film has high purity, good crystallinity, large grain size, few defects such as holes and gaps, and the combination of the double absorption layer retains AgIn x The high short-circuit current of Sb(S,Se)2 thin film is based on the second layer of AgSb 1+y (S, Se)2 reduces the drop in open circuit voltage. Through the cooperation of double absorption layers, the efficiency of the entire solar cell is increased to a maximum of 3.5%. x Sb(S,Se)2 / AgSb 1+y ITO / CdS / AgIn with (S,Se)2 thin film as absorber 0.5 Sb(S,Se)2 / AgSb 1.25 (S,Se)2 / Au solar cells have excellent electrical performance, with Jsc reaching 17mA·cm ‑2 , Voc reaches 396.5mV and FF is 52.7%.

The invention discloses a method for depositing an electron transport layer in an alcohol-assisted chemical bath for a perovskite solar cell and the perovskite solar cell, and the method comprises the steps: cleaning a substrate, and obtaining a clean conductive glass substrate; the preparation method comprises the following steps: adding SnCl2. 2H2O into an isobutanol aqueous solution, then adding urea, then adding mercaptoacetic acid and concentrated hydrochloric acid, and mixing to complete the preparation of a chemical bath solution; and the clean substrate is put into the chemical bath solution to be soaked and put into a drying oven to be subjected to a deposition reaction, cleaning and annealing treatment are conducted after the reaction is completed, and deposition of the SnO2 electron transport layer on the conductive glass substrate is completed. The SnO2 electron transport layer deposited by the method for depositing the electron transport layer through the alcohol-assisted chemical bath is better in uniformity, the agglomeration of nanoparticles is reduced, the transmittance of sunlight is higher, the sunlight utilization rate of a perovskite solar cell is improved, the open-circuit voltage and short-circuit current density of the cell are improved and reduced, and the service life of the cell is prolonged. Therefore, the photoelectric conversion efficiency of the perovskite solar cell is improved.

The application discloses a perovskite flexible solar cell and lithium-sulfur battery integrated self-charging system and a preparation method thereof. The system comprises a perovskite flexible solar cell and a lithium-sulfur battery. The perovskite flexible solar cell comprises a flexible substrate, a transparent conductive layer and a plurality of perovskite cell units arranged in sequence. The perovskite cell unit comprises an electron transport layer, a perovskite layer and a hole transport layer arranged in sequence. Each perovskite cell unit is in a series connection relationship. The positive electrode of the last perovskite cell unit serves as the positive electrode of the perovskite flexible solar cell. The negative electrode of the first perovskite cell unit serves as the negative electrode of the perovskite flexible solar cell. The lithium-sulfur battery comprises a positive electrode, a negative electrode and a solid electrolyte. The positive electrode is electrically connected with the positive electrode, and the negative electrode is electrically connected with the negative electrode, so as to form a loop. The application can improve the integration, overall efficiency and stability of the self-charging system.

This application relates to the photovoltaic field, providing a solar cell and a photovoltaic module. The solar cell includes: a substrate, the surface of which has a first region and a second region arranged at intervals, at least one of the first regions comprising a first part and a second part; a doped layer located within the substrate adjacent to the surface of the first part, the doping concentration of the doped layer being greater than the doping concentration of the substrate; a conductive layer located on the surface of the first region; a passivation layer located on the surfaces of the conductive layer and the second region; and a plurality of electrodes arranged at intervals along a first direction, the electrodes extending along a second direction, each electrode facing the second part, the electrodes being disposed on the side of the conductive layer away from the substrate and electrically connected to the conductive layer. The solar cell and photovoltaic module provided by this application can at least improve the photoelectric conversion efficiency.