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.

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 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.