35 results about "Co sensitization" patented technology

The invention relates to a phenothiazine co-sensitizer and its preparation method and application. The co-sensitizer uses phenothiazine as a raw material and is prepared by suzuki coupling, borate esterification, bromination, hydrolysis and other reactions. The target co-sensitizer compound was obtained. The co-sensitizer of the present invention has a 2D-π-2A structure, with double-long carbon chain modified phenothiazine as the electron donor end, and a double carboxyl group as the electron acceptor end and simultaneously as an anchoring group. This structure has two A carboxyl group is used as an anchor group, so it will have good adsorption stability. After co-sensitization with porphyrin dye YD2‑O‑C8, it has a better effect, and the conversion efficiency of solar cell devices can be increased to 8.78%. The increase is about 18%. This structure is beneficial to fill the adsorption gap between the main porphyrin dyes, so that it can also play a role in reducing charge recombination on the basis of increasing the short-circuit current.

The invention discloses a method for manufacturing a Ag2Se quantum dot-dye co-sensitization solar energy cell. According to the method, mercaptopropionic acid is taken as a surface stabilizing agent, polyvinylpyrrolidone or triammonium citrate is taken as a dispersant, a silver source and a selenium source are utilized to synthesize Ag2Se quantum dot in aqueous phase through a co-deposition method, and the synthesized Ag2Se quantum dot is dispersed in absolute ethyl alcohol to acquire a Ag2Se quantum dot absolute ethyl alcohol solution; a photo anode is sequentially dipped into the Ag2Se quantum dot absolute ethyl alcohol solution and a dye solution for sensitization to acquire a quantum dot-dye co-sensitization photo anode; an electrolyte layer and a counter electrode are prepared on the quantum dot-dye co-sensitization photo anode, and the Ag2Se quantum dot-dye co-sensitization solar energy cell is acquired. The method is advantaged in that the Ag2Se quantum dot is introduced into a dye sensitization cell, wider absorption spectrum is realized, through application to photoelectric devices, the photoelectric devices are made to keep relatively high photoelectric performance and photoelectric conversion efficiency.

The present invention discloses a quantum dot perovskite co-sensitization solar cell and a preparation method thereof. The preparation method of the quantum dot perovskite co-sensitization solar cell comprises the following steps of 1) preparing a TiO2 photo-anode on a conductive substrate; 2) depositing an Ag2S or Ag2Se quantum dot material on the TiO2 photo-anode to form the quantum dot adsorbed TiO2 photo-anode; 3) depositing a surface modification material ZnS quantum dot on the photo-anode after step 2) to form the surface modification quantum dot adsorbed TiO2 photo-anode; 4) preparing a CH3NH3PbX3 film, a cavity transmission layer and a counter electrode on the photo-anode after step 3) orderly to obtain the quantum dot perovskite co-sensitization solar cell, wherein X=Cl, I or Br. According to the present invention, the ZnS quantum dot surface modification Ag2S and Ag2Se and a perovskite light absorption material are used as a composite light absorption layer of the perovskite solar cell together, so that the photoelectric conversion efficiency of the perovskite solar cell can be improved effectively and greatly.

The invention discloses a method for preparing a multi-layer co-sensitized film by using light control technology. By coating PEGylated gold nanoparticles on the surface of the semiconductor film, under the irradiation of near-infrared light, the gold nanoparticles inside absorb light energy, and the Light energy is converted into heat energy, resulting in melting above 37°C. After melting, the part of the film covered with PEGylated gold nanoparticles can be re-immersed in another dye after being washed with absolute ethanol. By controlling the intensity and time of near-infrared light to affect the thickness of the blank adsorption layer, a multi-dye adsorption layer co-sensitized film is obtained through subsequent sensitization to improve the photoelectric conversion efficiency of dye-sensitized solar cells.

The invention relates to an organic dye, a preparation method thereof and a sensitized solar cell containing the organic dye, belonging to the technical field of dye-sensitized solar cells. The organic dye has the following structure, wherein R1, R2 are independently selected from any one of H, C1~C18 alkyl, and C1~C18 alkoxy; R3, R4 are independently selected from H, C1~C18 alkyl, C1 Any one of ~C18 alkylphenyl, C1~C18 alkoxyphenyl; R5, R6 are independently selected from H, F, C1~C18 alkyl, C1~C18 alkylphenyl, C1~C18 alkoxy Any one of phenyl groups; x, y are 0 or 1. The dye of the present invention has a twisted electron skeleton, and at the same time combines side modifying groups to make it have a better three-dimensional structure. The sensitized solar cell prepared by the dye has higher voltage and can be used as a co-sensitizer in combination with other high-efficiency dyes to prepare a device with excellent performance and good photothermal stability. The preparation method of the organic dye has rich sources of raw materials, low cost, good photothermal stability of the prepared device, and bright prospect of industrial production.

The invention discloses a method for preparing a sulfide quantum dot co-sensitization porous titanium dioxide photoelectrode by chemical bath co-deposition. The method comprises the following steps: preparing a TiO2 dense layer and a TiO2 porous film with a certain thickness on FTO (fluorine-doped tin oxide) glass; preparing two or more soluble metal salt solutions with a certain concentration, and sodium sulfide solution with a certain concentration; generating two or more sulfide quantum dots on the porous TiO2 film in situ by a chemical co-deposition method; and preparing the sulfide quantum dot co-sensitization porous titanium dioxide photoelectrode. The method is simple and quick; and when solar cells are prepared from the photoelectrode prepared according to the invention, the photoelectric conversion performance of the cells can be improved.

The invention discloses an indole-triphenylamine-arylmethylidenemalononitrile solar energy co-sensitization dye, a synthetic method and application thereof. The synthetic method comprises the following steps: adopting triphenylamine as the raw material, carrying out reaction on triphenylamine and POCl3 in a DMF solvent to compound and obtain an intermediate 4-(diphenyl amido) benzaldehyde; carrying out reaction on the 4-(diphenyl amido) benzaldehyde to obtain 4-bis (4-iodophenyl) aminobenzaldehyde; respectively carrying out reaction on the 4-bis (4-iodophenyl) aminobenzaldehyde and indole, 2-methylindole and 3-methylindole to obtain an indole-triphenylamine aldehyde derivative; respectively carrying out reaction on the indole-triphenylamine aldehyde derivative and cyanoacetic acid, malononitrile or 2-(3, 5, 5-trimethyl cyclohexene-2-octenylidene) malononitrile to obtain an indole-arylmethylidenemalononitrile-triphenylamine derivative. According to the synthetic method, the relevant optical property, photo-electro transition rate and co-sensitization efficiency of the product are primarily studied, and the foundation for developing the dye into a novel solar energy co-sensitization dye with excellent properties is laid.