115results about How to "Increased photocurrent density" patented technology

A dye-sensitized solar cell comprising a first support, a first conductive layer, a porous photovoltaic layer containing a dye, a carrier transport layer and a second conductive layer stacked in this order, wherein the length of contact side of the porous photovoltaic layer closed to the first conductive layer is different from that of its confronted side of the porous photovoltaic layer.

The invention discloses an inversed organic thin-film solar cell and a manufacturing method of the inversed organic thin-film solar cell. The inversed organic thin-film solar cell structurally and sequentially comprises a substrate, a transparent electric conduction cathode ITO, a cathode buffer layer, an optical activity layer, an anode buffer layer and a metallic cathode from bottom top top. Transparent electric conduction nano-particles are added in the anode buffer layer. The manufacturing method includes the steps of forming a substrate body through the substrate and the transparent electric conduction cathode ITO, washing and drying the base plate, manufacturing the cathode buffer layer on the surface of the transparent electric conduction cathode ITO, manufacturing and baking the optical activity layer on the surface of the cathode buffer layer, manufacturing the anode buffer layer on the surface of the optical activity layer, conducting annealing on the substrate body, and plating the anode buffer layer with the metallic cathode in an evaporation mode. High conductivity and high reflectivity of the transparent electric conduction nano-particles are used, the electron transmission rate and the light reflection rate of a traditional anode buffer layer are strengthened, the absorptivity of the optical activity layer to sunlight is improved, the light current density and the carrier transmission efficiency of the organic thin-film solar cell are accordingly improved, the series resistance of the cell is reduced, and the photoelectric conversion efficiency of a device is improved.

The invention discloses a GaN-based ultraviolet avalanche photo-detector. The GaN-based ultraviolet avalanche photo-detector is formed by arranging a sapphire substrate, a low-temperature nucleation layer, an n-type Al component gradient AlxInyGa1-x-yN layer, an Alx1Iny1Ga1-x1-y1N/Alx2Iny2Ga1-x2-y2N multi-quantum well structure absorption region, an Al component gradient Alx3Iny3Ga1-x3-y3N layer and an Alx4Iny4Ga1-x4-y4N/Alx5Iny5Ga1-x5-y5N multi-quantum well structure multiplication region in sequence from bottom to top. As a multi-quantum well has the advantages of high absorption coefficients, high transverse carrier mobility, strong polarization effects and the like, the absorption region and the multiplication region of the GaN-based ultraviolet avalanche photo-detector are designed to be of a multi-quantum well structure. In this way, the quantum efficiency and responsivity of the GaN-based ultraviolet avalanche photo-detector can be enhanced, the cut-off wavelength of the photo-detector can be freely tuned, and meanwhile the threshold value of avalanche breakdown voltage can be effectively reduced. Accordingly, important significance is achieved for manufacturing the high-performance ultraviolet photo-detector.

The invention provides a preparation method of a ZnO/zinc-indium-sulfur nanoheterojunction. An atomic layer deposition and hydrothermal method is taken into consideration, the in-situ growth of a ZnIn2S4 nanosheet array structure on a fluorine-doped tin oxide (FTO) substrate is achieved, a certain thickness of ZnO thin film is deposited by the ALD technology, and a ZnO/ZnIn2S4 nano-heterojunctionstucture is constructed, and the heterojunction of the ZnIn2S4 nanosheet array thin film with efficient visible-light photocatalytic activity is obtained. The visible-light absorptivity is improved, photon-generated carriers can be effectively separated at an interface, and the photocurrent density is greatly improved. The whole preparation process is simple, controllable, green, high in repeatability and suitable for large-scale preparation, and has great application prospects in the engineering fields such as photocatalysis.

The invention provides a surface plasmon resonance rectenna and a preparation method therefor. The surface plasma resonance rectenna adopts a three-layer structure, wherein the lower layer is made from metal Ti; a TiO2 nanotube array layer is generated on one surface of the metal Ti in an oxidation manner; a Cu nano particle metal layer is arranged on the surface of the TiO2 nanotube array layer through photodeposition; and the micro-surface appearance of the Cu nano particle metal layer is nano particles. In the invention, as photodeposition replaces ultrahigh vacuum electron beam evaporation technology, and inexpensive metal copper Cu replaces precious metal Au to prepare the rectenna adopting the Ti/TiO2NT/Cu structure, the difficult problem that the conventional metal layer can not be used in large-scale industrial production due to high cost in deposition technology, equipment investment and precious metal, and green low-cost development of solar energy technology is facilitated.

The invention discloses a phosphorus-containing compound, and a preparation method and an application thereof, and belongs to the fields of material science and technology and chemistry. The phosphorus-containing compound is prepared from cheap raw materials through the simple method; the method is essentially characterized in that the compound is prepared from metal ions and a phosphorus source under the illumination condition of a photoactive material; and the temperature in the prior art is more than 100 DEG C, and the method in the invention is a normal temperature synthesis process, so the obtained compound has a weak crystallization degree. The phosphorus-containing compound has a high photocatalytic activity as a conventional catalyst and a photocatalytic reaction cocatalyst, and achieves a high hydrogen production rate for a photocatalytic hydrogen production reaction. The method and the phosphorus-containing compound can be used for producing an electrode and producing a battery, so the production cost of the electrode and the battery is reduced, the preparation method is simplified, and the obtained electrode is a non-noble metal catalyst, and has the advantages of low cost, low overpotential, high stability and certain industrial application values.

The invention belongs to the technical field of nano composite materials and relates to a synthesis method of a BiVO4-Ni/Co3O4 heterojunction. The synthesis method comprises the following steps of: growing a layer of BiOI nanoparticles on an FTO substrate by adopting an electro-deposition method; dropwise adding a vanadyl acetylacetonate aqueous solution on the surface of the FTO; performing calcining at a high temperature to generate bismuth vanadate (BiVO4); obliquely placing FTO in a deionized water solution containing Co (NO3) 2.6 H2O, Ni (NO3) 2.6 H2O, C6H12N4, CH4N2O and NH4F through continuous ion adsorption reaction; performing hydrothermal reaction at 120-200 DEG C for 2-5 hours, taking out an obtained product, cleaning the product with deionized water; annealing the product at 300-500 DEG C for 1.5-3 hours; and naturally cooling the product to room temperature to obtain the BiVO4-Ni/Co3O4 heterojunction. The prepared heterojunction is used as a photoelectrode to be applied tophotoelectrochemical hydrolysis reaction. According to the preparation method, a simple electro-deposition method and a hydrothermal method are utilized, therefore, the method is simple in operationand has good repeatability; the used materials are low in cost, large in reserves and non-toxic, and meets the requirement for environmental friendliness; the prepared material can significantly reduce the interface reaction barrier, effectively inhibit solid-liquid interface charge recombination, accelerate water oxidation reaction kinetics and improve the photocurrent density so as to better utilize solar energy.

The invention discloses a polymer solar cell with a novel structure and a manufacturing method of the polymer solar cell, which belong to the technical field of a solar cell. An electric collecting layer of the polymer solar cell is divided into two layers; a first electric collecting layer is a two-dimensional plane film covered on a transparent electric base plate; a second electric collecting layer is arranged on the first electron collecting layer; and the second electric collecting layer is a film with a one-dimensional nanometer array structure. The manufacturing method for the second electric collecting layer comprises but is not limited to a solvothermal method, a template method, an electro-deposition method, an anodic oxidation method and the like. According to the polymer solar cell, the film with the one-dimensional nanometer array structure grows on the two-dimensional plane film to be as an electric collecting material; and the polymer solar cell has the advantage in long-term stability of photoelectric property of the battery compared with the traditional structure, is specially beneficial to the separation of load and directionality for transmission of the separated load and can effectively improve light current density and photoelectric conversion efficiency of the battery.

The invention discloses an inverted planar heterojunction hybrid perovskite solar cell and a preparation method thereof. According to the invention, an inverted planar heterojunction structure solar cell is adopted, a transparent electrode and silver are respectively used as an anode and a cathode, poly (triarylamine) is used as a hole transport layer, a fullerene derivative PC61BM is used as an electron transport layer, and polyvinylpyrrolidone is used as a perovskite passivation layer. According to the invention, polyvinylpyrrolidone can effectively passivate the grain boundary of perovskite; the surface defects of the perovskite are reduced, the series resistance of the perovskite cell is reduced, the filling factor and the current density of the solar cell are improved, the photoelectric conversion efficiency of the solar cell is finally improved, and the performance of the modified and passivated perovskite solar cell is greatly improved compared with the performance of an unpassivated device. The preparation method is simple in process operation, high in repeatability, low in cost and suitable for preparation and large-scale application of various planar heterojunction perovskite solar cells.

The invention relates to a ZnSe nanowire and a preparation method and an application thereof. The ZnSe nanowire is grown along the crystal orientation of the <100>. The ZnSe nanowire is provided with a sphalerite structure, the average diameter is 20 nm-80 nm, the length is 0.5 [mu]m-10 [mu]m, the size is uniform, the crystallinity is good, and the ZnSe nanowire has no structural defects such as a stacking fault. According to the ZnSe nanowire and the preparation method and the application thereof, ZnSe powder servers as pre-reaction materials, gold serves as a catalyst, and the ZnSe nanowire growing is obtained through growth on FTO conductive glass or a SnO2 single crystal substrate by a chemical vapor deposition method. The nanowire can be used for constructing solar batteries, photodetectors, nanometer lasers and the like, performance is especially good in the aspect of hydrogen production through solar photoelectrocatalysis decomposition of water, and good application prospects are achieved.

The invention relates to a ZnO-mixed cathode buffer layer-based organic solar battery. An inversion structure is adopted by the organic solar battery; the organic solar battery comprises a substrate layer, a transparent conductive cathode layer, a cathode buffer layer, a photoactive layer, an anode buffer layer and a metal anode layer which are sequentially arranged from bottom to top; and the cathode buffer layer is a solid thin film which is formed by mixing a ZnO nano-particle dispersion liquid and a ZnO precursor solution prepared through a sol-gel method at a ratio and carrying out thermal annealing. The invention further discloses a preparation method of the battery. The cathode buffer layer is prepared through mixing a certain amount of ZnO precursor solution prepared through the sol-gel method into the large-particle size ZnO nano-particle dispersion liquid, and gaps among ZnO nano-particles can be filled while relatively large contact area of the cathode buffer layer and the photoactive layer is ensured, so that the defect of the cathode buffer layer is reduced and the photoelectric conversion efficiency of a device is effectively improved.

The invention provides sub-micron titanium dioxide as well as a preparation method thereof and a dye-sensitized solar battery containing the material, which belong to the technical field of solar batteries. According to the sub-micron titanium dioxide, the problems that the size of titanium dioxide prepared by a traditional method is difficult to control, the distribution of the size is non-uniform and the energy loss of the sunlight irradiation of a dye-sensitized solar battery prepared by the titanium dioxide is large can be solved. The preparation method of the sub-micron titanium dioxide, which is provided by the invention, comprises the step of preparing the colloid solution of titanium salt under an alkali environment and the step of generating the sub-micron titanium dioxide. The size of the sub-micron titanium dioxide prepared by the method provided by the invention is easy to control. The sub-micron titanium dioxide provided by the invention is prepared by the method. The dye-sensitized solar battery provided by the invention comprises a scattering layer prepared by the sub-micron titanium dioxide. According to the sub-micron titanium dioxide as well as the preparation method thereof and the dye-sensitized solar battery containing the material, the efficiency of the battery is obviously enhanced, and the loss of the energy of the sunlight irradiation is effectively avoided.

The invention discloses a laminated composite solar battery, which consists of eleven different functional layers, namely a transparent substrate, a cathode layer, a polar organic layer, a first light sensitive layer, a semi-transparent anode layer, a P-type semiconductor layer, a P-N transition layer, a N-type semiconductor layer, a transparent conductive layer, a second light sensitive layer and a non-conductive light reflecting layer, wherein the transparent anode layer is reticular; a plurality of ways, including the lamination of an organic solar battery and an inorganic solar battery, are simultaneously adopted for enhancing the photoelectric conversion efficiency of battery, thus the solar energy is fully utilized, the skillful lamination of the organic and inorganic solar batteries is realized, and production costs are equalized while the maximal photoelectric conversion efficiency is exerted; the structure of the second light sensitive layer and the non-conductive light reflecting layer is adopted for repeatedly making use of the sunlight, so secondary photoelectric conversion of the organic solar battery is reinforced and the conversion efficiency of the overall battery can reach over 35%.

The invention discloses a preparation method of a Mo or Fe doped Zn1-xIn2S4 catalyst for photocatalytic nitrogen fixation and ammonia synthesis. The method comprises the following steps: dissolving zinc nitrate hexahydrate, indium nitrate and L-cysteine into deionized water under a magnetic stirring condition, adding an inorganic salt containing molybdenum or iron, conducting magnetic stirring, transferring a mixed solution into a hydrothermal reaction kettle, putting the hydrothermal reaction kettle into a blast drying oven together, and conducting drying to obtain a precursor; and carrying out hydrothermal reaction for 15-24 hours, conducting cooling to room temperature to obtain a yellow-green precipitate, washing the yellow-green precipitate with deionized water and ethanol in sequence, repeatedly carrying out centrifugal washing for 3-5 times, and conducting drying in a blast drying oven at the temperature of 60-100 DEG C for the whole night to obtain the Mo or Fe doped Zn1-xIn2S4photocatalytic nitrogen fixation catalyst. The Mo or Fe doped Zn1-xIn2S4 photocatalytic nitrogen fixation catalyst provided by the invention is high in nitrogen fixation efficiency and simple in preparation method, and has a good application prospect.

The invention discloses a poly-3, 4-ethylenedioxythiophene modified film, a preparation method and application thereof. The preparation method includes: preparing a polyvinylidene fluoride based substrate film on a support material; taking an ethanol solution of a Fe<3+> soluble salt as an oxidizing agent, and uniformly coating the polyvinylidene fluoride based substrate film with the oxidizing agent to obtain a polyvinylidene fluoride based substrate membrane coated with the oxidizing agent; subjecting a 3, 4-ethylenedioxythiophene monomer to gas-phase polymerization reaction on the polyvinylidene fluoride based substrate membrane coated with the oxidizing agent so as to obtain the poly-3, 4-ethylenedioxythiophene modified film. According to the invention, by adopting the ethanol solutionof a Fe<3+> soluble salt as the oxidizing agent, the method utilizes the volatility of ethanol to facilitate completion of oxidizing agent coating and timely drying, avoids liquid flow in the dryingprocess, guarantees the coating uniformity of the oxidizing agent, ensures the gas-phase polymerization effect, and ensures the quality of the modified film. The film provided by the invention can realize removal of pollutants generated by mineralization decomposition of the pollutants through photocatalysis, alleviates film pollution, and has good photoelectric synergistic effect.

The invention belongs to the technical field of preparation of electrochemical electrode materials and particularly relates to a nano Si/TiO2 ordered array compound photocatalytic water splitting hydrogen preparing cathode material and a preparation method thereof. According to the invention, nanospheres are photoetched on a P type Si substrate to prepare an ordered Si nanowire array which is coated by TiO2 to greatly improve the optical absorption property of the material, so that the photocurrent density and the chemical stability are improved, and the substrate can be used as a good photocatalytic water splitting hydrogen preparing cathode material. Experiments show that according to the material prepared by the method provided by the invention, when the Si nanowire array is 0.6-1.4 mu m long, the photocurrent density is great while when the Si nanowire array is 1.1 mu m long, the photocurrent density is maximum.

The invention relates to a preparation method of a tungsten oxide-cuprous oxide heterojunction photoelectrode material as well as a product thereof and application thereof. A two-step process is adopted to prepare tungsten oxide-cuprous oxide heterojunction, and tungsten oxide is grown on FTO in situ through a hydrothermal method by controlling reaction time, solution acidity and alkalinity, temperature and the like; a magnetic-control reaction technology is adopted, so that a cuprous oxide film with certain thickness is grown on the tungsten oxide through copper target sputtering reaction bycontrolling the content of oxygen gas in working gas, so that the tungsten oxide-cuprous oxide heterojunction photoelectrode material with excellent photocurrent density can be obtained. The technicalscheme can greatly reduce application of a chemical reagent, can effectively reduce energy consumption, and is excellent in photoelectric performance; moreover, the preparation process is simple andeasily controlled, the repeatability is strong, and large-scale batch production is easy to realize.

The invention relates to a composite photocatalyst, its preparation and application. In the invention, a graphene-PbS/TiO2 nano-composite material is adopted. Graphene and PbS semiconductor nanoparticles are compounded on an outer surface of a titanium dioxide nanotube array, an opening of the nanotube array and an inner surface through electrodeposition, thus obtaining the composite material. The novel nano-material graphene-PbS/TiO2 with efficient environmental functions can be used as a photocatalyst, and has excellent performance in treatment of organic pollutant wastewater.

The invention relates to an N-doping SiC single crystal nanometer pore passage array, in particular to a preparation method of a photoelectric catalysis anode prepared from the N-doping SiC single crystal nanometer pore passage array, and belongs to the technical field of material preparation. The invention provides the N-doping SiC single crystal nanometer pore passage array. The N-doping SiC single crystal nanometer pore passage array is applied to an N-doping SiC nanometer pore passage array photoelectric catalysis anode; the high photocurrent density (as high as 2.41mA/cm<2>), fast photoresponse and wide spectrum response range are realized under visible light.

The invention provides an Ag2ZnSnS4/Mo structure photo-anode with visible-light response, a preparation method of the photo-anode and an application of the photo-anode. The method includes the steps:electro-depositing the metal elements of silver, tin and zinc on a molybdenum mesh by taking the molybdenum mesh as a substrate, taking silver nitrate as a silver source, taking stannous chloride as atin source and taking zinc chloride as a zinc source; vulcanizing and calcining the metal elements. The method has the advantages of simplicity, mild reaction conditions, low cost, no pollution and the like, and has a high commercial application prospect. The Ag2ZnSnS4/Mo structure photo-anode is quite high in photoelectric conversion efficiency and can be used for the fields of solar batteries,photoelectric catalysis, photocatalysis and the like. Experiment research finds that the photo-current density of the Ag2ZnSnS4/Mo structure photo-anode in a photoelectrochemical test exceeds 4mA/cm<2>, the photoelectric conversion efficiency of the photo-anode in a main light absorption area reaches 25%, and importantly, the photo-anode shows an excellent hydrogen evolution property when the photoelectrochemical test is performed in a formed electrolytic tank.

The invention belongs to the field of photo-anodes, and discloses a ZnO nano-rod photo-anode of which the structure is NiO/CdS/ZnO. The invention also discloses a preparation method of the ZnO nano-rod photo-anode. The preparation method comprises the following steps: S1, preparing a ZnO nano-rod with a hydrothermal method; S2, coating the surface of the ZnO nano-rod with CdS to form a CdS/ZnO structure; and S3, sedimentating NiO on the CdS/ZnO structure to form a NiO/CdS/ZnO composite structure. According to the nano photo-electrode composite material disclosed by the invention, the absorption range of a solar spectrum can be broadened, the performance of the photo-electrode material used for photo-catalytic electrolysis water is improved, the preparation method is simple, and particularly, a laminated material coated through spin-coating is relatively low in cost, energy-saving and environmentally-friendly.

The preparation of the dye-sensitized solar cell photoanode and the test of the photoelectric conversion efficiency of the co-sensitized solar cell assembled therefrom relate to the preparation method of azo organic luminescent material and N719 co-sensitized solar photoanode. The product of the present invention is based on the co-sensitization of TiO2 photoanode and platinum conductive glass based on blue-light material [Mn(azobenzene-4,4'-dicarboxylic acid) 0.5(H2O)]n complex and N719 co-sensitization modification Solar cells, compared with solar cells composed of N719-modified TiO2 photoanodes, based on [Mn(azobenzene-4,4'-dicarboxylic acid) 0.5(H2O)]n complexes and N719 co-sensitization modified The TiO2 photoanode increases the photocurrent density of the solar cell composed of N719-modified TiO2 photoanode from 8.09 mA/cm2 to 17.71 mA/cm2, and the photoelectric conversion efficiency of the battery increases from 4.0% to 7.1%, so the description is based on [Mn(azo Benzene-4,4'-dicarboxylic acid)0.5(H2O)]n complexes and N719 co-sensitize the modified TiO2 photoanode to enhance the absorption intensity of sensitized solar cells in the visible region.

The invention discloses a copper bismuthate film embedded with ligand-free quantum dots, and a preparation method and an application thereof. The preparation method comprises the following steps: dispersing a semiconductor oxide or a metal material in a liquid medium to obtain a mixed solution; irradiating the mixed solution under a laser beam to obtain a ligand-free quantum dot colloid solution;and mixing the ligand-free quantum dot colloid solution with a copper bismuthate precursor solution, forming a film, and sintering the film to obtain the copper bismuthate film embedded with ligand-free quantum dots. The ligand-free quantum dots are uniformly embedded in the copper bismuthate film by a liquid phase pulse irradiation technique, so that the carrier separation efficiency of the copper bismuthate film is significantly improved; and results of photocurrent density test of films shows that the photocurrent density of the copper bismuthate film not embedded with ligand-free quantum dots is 2.0 mA/cm<2>, and the photocurrent density of the copper bismuthate film embedded with ligand-free quantum dots is increased to about 3.0 mA/cm<2>, so the photoelectric performances are remarkably improved.