48results about How to "Increase photovoltage" patented technology

The quasi-solid and nano-multiple gel electrolyte and produce method and application is to equably mix nanograde additive into gelated electrolyte system with polymer coagulant or small molecule coagulant to get the quasi-solid and nano-multiple gel electrolyte. Compared with the common gel electrolyte, it solves the problem about sealing liquid state electrolyte batteries and leaking to enhance charge transmission ability and increase ionic steady pervasion current and apparent diffusion coefficient of redox and improving general capability of quasi-solid gel batteries. This electrolyte is using for dye-sensitized solar cell and fuel cell to enhance photovoltage, short circuit current density, photoelectric conversion efficiency and long time stability to dye-sensitized solar cell.

Systems and methods are provided for the fabrication and manufacture of efficient, low-cost p-n heterojunction pyrite solar cells. The p-n heterojunction pyrite solar cells can include a pyrite thin cell component, a window layer component, and a top surface contact component. The pyrite thin cell component can be fabricated from nanocrystal paint deposited onto metal foils or microcrystalline pyrite deposited onto foil by chemical vapor deposition. A method of synthesizing colloidal pyrite nanocrystals is provided. Methods of manufacturing the efficient, low-cost p-n heterojunction pyrite solar cells are also provided.

The invention discloses a preparation method of TiO2 nanoparticles with photonic crystal characteristics. The preparation method comprises the following steps: preparing a precursor solution by mixing TiCl4 solution, absolute ethyl alcohol and deionized water; and with butterfly wings as a bio-template, treating the template by a solution impregnation method and removing the template at a high temperature to obtain the TiO2 nanoparticles. The preparation method disclosed by the invention has the advantages of simple technology, easily available raw materials, good product structure and performance and the like; and the prepared TiO2 nanoparticles with photonic crystal characteristics have a good application prospect in the field of thin-film solar cell study.

The invention discloses a rare earth-doped titanium dioxide photo-anode for a dye-sensitized solar cell. The photo-anode is prepared from a rare earth compound and tetrabutyl titanate by the following steps of: preparing nano-crystalline titanium dioxide colloid with the tetrabutyl titanate by a hydrothermal method; dissolving the rare earth compound in solution of nitric acid to obtain solution of nitrate, hydrolyzing the tetrabutyl titanate to obtain titanium dioxide sol, adding the solution of nitrate into the sol and processing the mixture by the hydrothermal method and high temperature calcining to obtain the rare earth-doped titanium dioxide powder; and adding the rare earth-doped titanium dioxide powder into the titanium dioxide colloid, scattering, coating and calcining the mixture at a high temperature to prepare the rare earth-doped titanium dioxide photo-anode. The photo-anode and the preparation method have up-conversion luminescence function and p-type doping effect and improve the photocurrent and photovoltage of the cell, the Fermi level of the titanium dioxide and the photoelectric conversion efficiency of the cell. The method is used for improving the photoelectric conversion efficiency of the dye-sensitized solar cell with simple process and abundant raw materials and can also be used for the related fields of other solar cells and the like.

The invention belongs to the preparing field of TiO2 nano-crystal thin film photoelectrode of dye sensitization solar cell, especially relates to a preparing method of non-metal doped dye sensitization TiO2 nano-crystal thin film photoelectrode which is prepared by colloids containing non-metal doped large granule TiO2 nano-crystal and non-metal doped TiO2 nano-crystal granule. The photoelectrodeprepared by the invention is prepared by rotary coating the non-metal doped TiO2 colloidal sols and non-metal doped TiO2 power body slurry in order on a conductive substrate; after naturally drying, performing heat-treatment to obtain a nano-crystal thin film photoelectrode with porous structure. On one hand, the non-metal doped TiO2 nano-crystal granule changes the performance of the semiconductor, and is used as almsgiver to provide more carriers to improve the electric conductivity; on the other hand, the non-metal doped TiO2 nano-crystal granule changes the position of TiO2 energy band toimprove the photovoltage and the photo absorption efficiencies. The preparing method of the invention is simple and is easy to operate, is suitable for the industrial production preparation of the dyesensitization TiO2 nano-crystal thin film photoelectrode, and also is suitable for the fields of photochemical catalysis electrode and self-cleaning glass and so on.

The present invention relates to a novel 2,6-site-substituted BODIPY organic dye sensitizer and a preparation method therefor. The organic dye sensitizer is organic photovoltaic materials with a D-pi-A structure. By taking a meso-site-substituted BODIPY core as a pi bridge framework, the sites 2 and 6 of the BODIPY core is respectively substituted by an electron donor and an electron acceptor. The present invention further discloses a preparation method for the above the dye sensitizer. The preparation method obtains a dye molecule having a general structural formula I by taking 2,4-dimethylpyrrole as an initial reaction raw material, performing a serials of simple synthesis reactions, and finally performing classical Suzuki coupling and Knoevenagel condensation reactions. The dye sensitizer synthesis method is simple, easy to control and high in yield, and has general applicability. When the method is applied to dye sensitized solar cell preparation, a dye sensitized solar cell material with a high fill factor and an ideal photoelectric conversion efficiency can be obtained. The formula I is shown in the description.

The invention provides a B-doped NiSi / n-Si photoanode, comprising an n type monocrystalline silicon piece, a B-doped NiSi thin film generated on the surface of the n type monocrystalline silicon piecein situ by virtue of solid-phase reaction, and a SiO2 layer does not exist between the n type monocrystalline silicon piece of the photoanode and the B-doped NiSi thin film. Therefore, the NiSi / n-Siphotoanode structure provided by the invention is very beneficial to transmission of photoinduced charges, and saturation photocurrent density of the photoanode under the AM1.5 sunlight illumination condition can reach 33mA / cm<2>. Besides, the photoanode provided by the invention is doped with B, and a rapid heat treatment process is performed in a preparation process, so that the photoanode has avery high Schottky barrier, a high photovoltage can be produced, and then an opening potential is effectively reduced to 1.03V vs RHE. Besides, the invention also provides a preparation method of thephotoanode and application of the photoanode in photoelectrochemical water decomposition.

The invention discloses an unbiased photoelectrochemical hydrogen production system based on an InGaN nanocolumn photoelectrode on graphene and its application. The system includes a photoanode, a photocathode, an electrolyte, a light source, and an electrolytic cell. The structure of the photoanode from bottom to top is the substrate, graphene on the substrate, and InGaN nanocolumns grown on the graphene. The photocathode structure from top to bottom is the substrate and the InGaN nanocolumns grown on the substrate; the use of graphene in the present invention not only broadens the selection range of the substrate, but also can be used as a conductive electrode, reducing the cost; graphene It can also form a Schottky barrier with the nanocolumn, which is beneficial to the separation of photogenerated carriers, enhances the carrier transport performance, and greatly improves the photoelectric performance of the nanocolumn; at the same time, the light transmission of graphene can prepare InGaN The nano-column integrated photoelectrode can broaden the spectral absorption, increase the photovoltage required for water splitting, and realize the unbiased photoelectric water splitting to produce hydrogen.

The invention discloses a preparation method of a dye-sensitized solar cell grapheme-doped composite electrode. The preparation method comprises the following steps that: a hydrothermal method is adopted to prepare a TiO2 nano array on conductive glass, and as a result, direct electron channels are provided, and the diffusion length of electrons can be increased, and electron recombination can be reduced, and the lifetime of the electrons can be increased; the hydrothermal method is adopted to prepare TiO2-graphene nano particles, and as a result, doped graphene can not only reduce the recombination of photogenerated electrons and holes, but also can enhance the capture of light, and the number of the photogenerated electrons can be increased; the TiO2-graphene nano particles are printed on the TiO2 nano array through a screen printing method, and as a result, a larger specific surface area can be obtained, and dye adsorption quantity can be increased; an organic solvent can be removed from a slurry through sintering; and the dye is adsorbed, and the dye-sensitized solar cell grapheme-doped composite electrode can be obtained.