34 results about "Co sensitization" patented technology

A NaGdF4 multifunctional fluorescent label nano-material based on europium ion dual-mode luminescence. In the invention, Tm<3+> (Yb <3+>) and Eu<3+> are respectively mixed into cores and shell bodies of NaGdF4 nanometer crystals, and thus europium ion dual-mode luminescence is realized in monodisperse hexagonal phase NaGdF4 nanometer crystals. Through co-sensitization of Tm<3+> and Yb <3+> in the cores and the advantages of core-shell structures, strong europium ion red up-conversion luminescence is realized under near-infrared light of 980nm, and strong europium ion red down-conversion luminescence is realized under ultraviolet light of 273nm. The monodispersed NaGdF4 nanometer crystals which have the core-shell structures and can generate europium ion up-conversion luminescence and europium ion down-conversion luminescence can be utilized as a multifunctional fluorescent label nano-material after being treated by surface functionalization. The NaGdF4 fluorescent label nano-material with core-shell structures comprises NaGdF4 comprising 0 to 50 molar percent Yb <3+> and 0 to 10 molar percent Tm<3+>, and NaGdF4 comprising 0 to 50 molar percent Eu<3+>.

The invention relates to a dye sensitization solar battery, particularly a quantum dot and dye co-sensitization solar battery and a preparation method thereof. According to the invention, dye and quantum dots are sensitized in a photoanode and a photocathode respectively so as to enable visible light and infrared light to be absorbed in the two electrodes respectively; the sensitization solar battery includes the photoanode, the photocathode and an electrolyte arranged therebetween, wherein the photoanode consists of a n-shaped semi-conductor TiO2 and dye molecules adsorbed to the surface of the n-shaped semi-conductor TiO2; the photocathode consists of p-type quantum dots; and the electrolyte is obtained by dissolving Na2S, elementary substance S and sodium hydroxide in deionized water. According to the invention, as rays with different wavelengths are provided with different penetrating capabilities, dye is used to absorb visible light with less wavelength in the photoanode, and then quantum dots with less bend gap are used for absorbing transmitted near-infrared and infrared light, and as a result, sunlight can be absorbed and transformed more effectively and widely.

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 preparation method of a photoelectrochemical aptamer sensor for detecting a prostate-specific antigen. Lots of cadmium sulfide quantum dots and a signal transduction probe having one end marked with graphene quantum dots are loaded on a paper-based platinum/zinc oxide nanosheet and a co-sensitization effect is activated, so that a photocurrent signal is increased; when anaptamer of a specific recognition prostate-specific antigen with gold nanoparticles labeled and the signal transduction probe are hybridized to form three strings of helical molecular switches, the co-sensitization effect is suppressed and a signal quenching effect of the gold nanoparticle is generated, and the photocurrent signal decreases; and when the prostate-specific antigen identifies the aptamer, the conformation of the three strings of helical molecular switches changes, the co-sensitization effect is reactivated, the quenching effect is eliminated, and the photocurrent signal is enhanced. And the sensitive detection of the prostate specific antigen is realized based on the converted signal.

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 relates to a method for preparing a permutable multi-dye absorption layer co-sensitized thin film by an electrochemical desorption method, which comprises the following steps of: (1) preparing a nano porous semiconductor thin film on a conductive glass substrate; (2) dipping the nano porous semiconductor thin film in the solution of dye a so that the thin film completely absorbs the solution of the dye a; (3) using the nano porous semiconductor thin film which absorbs the dye a as a work electrode and a platinum sheet as a desorption electrode; (4) dipping the semiconductor thin film containing a dye blank layer into a second dye b so that the dye blank layer absorbs the dyes to obtain the co-sensitized thin film containing two dye absorption layers; and (5) repeating the steps (3) and (4) to obtain the co-sensitized thin film containing the multi-dye absorption layer. The invention has the advantages that the contradiction among dye absorption time, dye absorption amount and the dye blank layer thickness in original method for preparing the co-sensitized thin film only by dye absorption can be solved; and the thickness of each dye absorption layer is adjusted and controlled by controlling the depth of potential distribution.

The invention relates to a preparation method of a photoelectrochemical 17 beta-estradiol aptamer sensor based on indium sulfide and cadmium sulfide co-sensitized cerium-doped titanium dioxide, and belongs to the field of photoelectrochemical sensors. According to the method, cerium-doped titanium dioxide is obtained by using a simple hydrothermal method to serve as a substrate material, and a light current is obtained; and for the cerium-doped titanium dioxide after indium sulfide sensitization, the photoelectric conversion efficiency is greatly improved, and the light absorption range is enlarged. Under the co-sensitization of cadmium sulfide, the positions of conduction bands of the three are reduced in a stepped mode, so that rapid transfer of electrons is facilitated, and an ideal light current signal is provided. The high-sensitivity detection of 17 beta-estradiol is realized by combining the specific recognition effect of an aptamer and the 17 beta-estradiol; the detection limitof the 17 beta-estradiol is 3.98 fg/mL; and the method has important significance in analysis and detection of the 17 beta-estradiol.

The invention discloses a polyacid co-sensitization agent of a dye-sensitized solar cell and a preparation method, and provides a novel polyacid compound. The molecular formula is C48H40Cu2N8O23V2W4, the structural formula is [Cu(Cl2H8N2)2]2[V2W4O19].4H2O, and the molecular weight is 2061.24. The synthesis process is simple, environment friendliness and safety are achieved, the polyacid compound can be used as the co-sensitization agent of the dye-sensitized solar cell, and compared with independent N719 sensitization, the photoelectric conversion efficiency of the solar cell is improved by more than 21%, and a new way is provided for solving energy problems.

The invention discloses a preparation method of a composite light anode of a titanium dioxide nanotube array with a wide light intensity application scope. The method comprises the step of allowing titanium foil after anode oxidation to be subjected to sensitization of an inorganic semiconductor In2S3 and sensitization treatment of a dye sensitizer N719 to obtain the composite light anode of N719/In2S3/the titanium dioxide nanotube array/a Ti substrate. The photoelectric property of the light anode of the inorganic semiconductor co-sensitization titanium dioxide nanotube array prepared by the method is greatly improved. The method is rich in used material, low in condition requirement and simple in equipment; and the obtained product is stable and can be permanently stored at a room temperature.

For the problem that the photoelectric converting efficiency is influenced since the porphyrin in the porphyrins dye-sensitized solar cell is low in light-harvesting efficiency and serious in auto-aggregation and dark current, the astaxanthin is firstly imported as co-sensitizing agent to fill up an optical window of the porphyrin, the light-harvesting efficiency of the porphyrins dye-sensitized solar cell is improved and the dark current is reduced, thereby improving the photoelectric converting efficiency of the cell. Compared with various co-sensitizing agents used for the porphyrins dye-sensitized solar cell, the astaxanthin used by the invention not only effectively improves the photoelectric converting efficiency of the cell, but also is free from any tedious synthesis step; the astaxanthin is green and clean in production process, natural and cheap, rich and easy to get, clean and green, harmless to biology and environment, and has extensive application prospect.

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.

A co-sensitized dye-sensitized solar cell (DSC) is provided, made from a transparent substrate and a transparent conductive oxide (TCO) film overlying the transparent substrate. An n-type semiconductor layer overlies the TCO, and is co-sensitized with a first dye (D1) and a second dye (D2). A redox electrolyte is in contact with the co-sensitized n-type semiconductor layer, and a counter electrode overlies the redox electrolyte. The first dye (D1) has a first optical absorbance local maxima at a first wavelength (A1) and a second optical absorbance local maxima at a second wavelength (A2), longer than the first wavelength. The second dye (D2) has a third optical absorbance local maxima at a third wavelength (A3) between the first wavelength (A1) and the second wavelength (A2). In one aspect, the first dye (D1) includes a porphyrin material, for example, a metalloporphyrin obtained by complexation with a transition metal such as zinc (i.e. zinc porphyrin (ZnP)).

The invention relates to a preparation method of a photosensitive dye for a solar battery and belongs to the technical field of photosensitive dyes. Aimingat the problems that a synthetic dye contains precious metal elements, the synthesis process is complex, separation is difficult, the cost is high and environmental pollution is caused, the invention provides the preparation method of the photosensitive dye for the solar battery. The preparation method comprises the following steps of: extracting high-purity anthocyanin and beta-carotene from raw materials, namely grape skin and carrots, respectively preparing dye solutions by use of the high-purity anthocyanin and beta-carotene, mixing the two dye solutions with each other, and finally regulating the pH of the mixed dye, thereby obtaining the photosensitive dye for the solar battery. Natural dye is adopted to replace the synthetic dye and is wide in source, simple in extraction method, low in cost, high in molar absorption coefficient and free from environmental pollution. The composite dye prepared by the preparation method is high in co-sensitization electrode sensitization speed and wide in absorption spectrum, and is high in photoelectric conversion efficiency when prepared into the prepared solar battery, thereby being an excellent photosensitive dye.

The invention relates to a method of preparing La-doped CdS/CdSe sensitizer for a solar cell. According to the method, La impurity atoms are doped in CdS semiconductor quantum dots, co-sensitization with CdSe quantum dots is then carried out to serve as a sensitizer to be assembled to a quantum dot sensitization solar cell. Through optimizing a transmission path of charges inside the cell, electron holes can be separated more quickly, electrons can be injected to a TiO2 conduction band more efficiently, dark current is reduced, and the short circuit current, the open circuit voltage and the photoelectric conversion efficiency of the solar cell are improved. The method is simple, operation is easy, the cost is low, and large-area preparation can be realized.

The invention relates to a method of manufacturing a CdS/Mg-doped CdSe quantum dot sensitizer for a solar cell. The method comprises steps: Mg impurity atoms are doped in CdSe semiconductor quantum dots, co-sensitization is then carried out with CdS quantum dots to serve as a sensitizer, and thus a quantum dot sensitization solar cell is assembled. Through optimizing a transmission path of charges in the cell, electron holes can be separated more quickly, electrons can be more effectively injected in a TiO2 conduction band, dark current is reduced, and the short circuit current, the open circuit voltage and the photoelectric conversion efficiency of the solar cell are improved. The method is simple, easy to operate, low in cost and large-area manufacturing can be realized.

The invention discloses a method for preparing a multilayer co-sensitized thin film by using a light control technology. The surface of a semiconductor film is coated with PEGylated gold nanoparticles, under the irradiation of near-infrared light, the gold nanoparticles inside absorb light energy and convert the light energy into heat energy, so that the gold nanoparticles can be molten at the temperature of 37 DEG C or above, the molten gold nanoparticles are washed with absolute ethyl alcohol, and the part, covered with the PEGylated gold nanoparticles, of the thin film can be immersed intoanother dye again. The thickness of the blank adsorption layer is influenced by controlling the illumination intensity and the illumination time of near-infrared light, and the multi-dye adsorption layer co-sensitized thin film is obtained through subsequent sensitization, so that the photoelectric conversion efficiency of the dye-sensitized solar cell is improved.

The invention discloses a preparation method of an Ag2S-Sb2S3 co-sensitized ZnO-based photo-anode. The method comprises the steps of firstly, generating a ZnO nano structure on ITO conductive glass; then based on a continuous ion layer adsorption reaction method, respectively reacting the glass with the ZnO nano-structure in a Na2S aqueous solution, an AgNO3 aqueous solution, a Na2S aqueous solution and a SbCl3 ethanol solution (the glass is cleaned and blow-dried with nitrogen after each step of reaction, and then the next step is carried out); and repeating the process for several times, anddrying in a blast drying oven to finally prepare a layer of Ag2S-Sb2S3 co-sensitized ZnO-based photo-anode on the surface of the ITO conductive glass. The Ag2S-Sb2S3 co-sensitized ZnO-based photo-anode prepared on the basis of the method is wide in photo-response range, high in light absorption intensity and high in carrier extraction and transmission rate, the preparation method is simple and easy to control, and the method can be popularized to preparation of other various sulfide co-sensitized photo-anodes.

The invention discloses a co-sensitizer based on a high-rigidity quinoxaline group. The co-sensitizer comprises a high-rigidity quinoxaline group dye and a ruthenium dye HD-2, the high-rigidity quinoxaline-based dye is a quinoxaline-based dye LY01, a quinoxaline-based dye LY02 and a quinoxaline-based dye LY03. Compared with single HD-2, a battery co-sensitized by the high-rigidity quinoxaline-based dye and the ruthenium dye HD-2 shows higher efficiency, the space between heavy HD-2 molecules can be filled by the adopted high-rigidity quinoxaline-based dye, the TiO2 surface is more effectively covered, and the FF value of the obtained battery is improved.

The invention discloses a preparation method of a photoelectric active material of multi-quantum-dot sensitized TiO2. The preparation method comprises the following steps: transferring thioglycolic acid TGA into ultrapure water containing Cd (AC)2. 2H2O under the condition of introducing N2 to obtain a mixed solution A; then adjusting the pH value of the mixed solution A to 10 by using NaOH, which is accompanied by the change of the solution from turbid to clear, wherein a mixed solution B is obtained at the moment; adding trisodium citrate and Na2TeO3 into the mixed solution B, then injecting NaBH4 and conducting bubbling for 10 minutes by using N2; and transferring the solution in the step 3 into a reaction kettle for reaction to obtain yellow CdTe QDs, and storing the yellow CdTe QDs at 4 DEG C. The method disclosed by the invention has the beneficial effects that the CdS QDs and the CdTe QDs are adopted to co-sensitize TiO2, a CdS QDs/CdTe QDs/TiO2 NPs composite material is successfully prepared, and due to a stepped energy level structure among the three materials, the absorption of visible light is remarkably enhanced under the excitation of the visible light, the service life of a carrier is prolonged, the separation of photo-generated electron holes is effectively promoted, and photoelectric conversion efficiency and stability are remarkably improved.

The invention discloses julolidine compounds, and a preparation method and application thereof. The chemical structural formula of the julolidine compounds is as shown in formula (I), and in the formula (I), the structural formula of a substituent R is as shown in any one of two formulas shown in the description. Two julolidine compounds are synthesized by taking julolidine as a donor and cyanoacetic acid or rhodanine acetic acid as an acceptor. After the compounds and a ruthenium metal dye Z907 are co-sensitized, an assembled dye-sensitized solar cell has good photoelectric conversion efficiency, and a new applicable substance is added for screening of a co-sensitizer of the ruthenium metal dye Z907.