1817results about How to "Improve photoelectric performance" patented technology

The invention discloses a graphene composite transparent electrode and a preparation method of the graphene composite transparent electrode and application of the graphene composite transparent electrode. The graphene composite transparent electrode comprises a flexible transparent base plate. A graphene layer and a conductive macromolecule layer are arranged on the flexible transparent base plate. The preparation method of the graphene composite transparent electrode can be achieved by two ways, one way includes the steps that graphene is transferred to the flexible transparent base plate, and then conductive macromolecule materials coat the surface of graphene, and the other way includes the steps that firstly the conductive macromolecule materials coat the surface of the flexible transparent base plate, and then the graphene is transferred to the conductive macromolecule layer of the flexible transparent base plate. The graphene composite transparent electrode can be applied to manufacturing touch screens, solar cells, organic light emitting diodes, liquid crystal display screens, thin film transistors, flexible electronic products or wearable electronic products. The graphene composite transparent electrode takes the performance of electrical conductivity, light transmittance and flexibility into account and has the excellent photoelectric property and flexibility.

The invention discloses controllable crystalline form titanium dioxide and a graphite alkene composite material with high efficient photoelectricity activity and a preparation method thereof. The composite material is formed by mixing TiO2 powder and graphite alkene or scattering the TiO2 powder in oxidized graphite alkene dispersing agents to perform hydro-thermal reaction. The mass ratio of TiO2 powder and graphite or graphite alkene is 1:1 to 500:1. The preparation method is simple, low in cost and environmental-friendly. The controllable crystalline form titanium dioxide and a graphite alkene composite material with high efficient photoelectricity activity can control crystalline form of the obtained TiO2 according to the ratio of alcohol and water or amount of titanium sources. When the amount is amplified, the controllable crystalline form titanium dioxide and a graphite alkene composite material with high efficient photoelectricity activity have good performances. After the graphite alkene is composed, photocatalysis is greatly improved. All obtained products are applied to fields of dye sensitization solar cells, catalysts, lithium ion cells, sensing and the like.

The invention relates to a method for preparing a high-quality perovskite thin film by introducing a cheap additive. An ammonium salt additive is introduced into a high-quality perovskite material during the preparation process, the additive can be introduced into a perovskite precursor solution or an anti-solvent, the structural formula of the perovskite material is AMX3, A is an organic cation, CH<3>NH<3> and NH<2>-CH are a mixture of one or two of NH<2>, CH<3>CH<2>NH<3>, CH<3>(CH<2>)NH<3> and CH<3>(CH<2>)<3>NH<3>, M is a mixture of one or two of Pb<2><+> or Sn<2><+>, and X is a mixture of one or two of Cl, Br, I or SCN. With the introduction of the ammonium salt, the internal defect of the thin film is reduced, a surface state is reduced, and a new preparation path is provided. The method has the advantages of process simplicity, low cost and high repeatability, is beneficial for improving the optical and electrical properties of the perovskite thin film and has a good application prospect.

The invention discloses a manufacturing method for the solar energy cell with double-layer perovskite film structure, and the method comprises the following steps: 1) selecting a conductive substrate; etching patterns on the conductive substrate and obtaining the etched conductive substrate; 2) preparing an electron transport layer or a hole transport layer; (3) preparing a film with a double-layer perovskite structure; 4) preparing a hole transport layer or an electron transport layer; and 5) hotly plating a gold or silver electrode on the hole transport layer or the electron transport layer to obtain an n-I-P-type or p-I-N-type solar cell with the double-layer perovskite thin film structure. The invention further discloses a solar energy cell manufactured and obtained from the above method. The manufacturing method is environmentally friendly, can change the morphology, the crystallinity and the interface of the perovskite film and increases the photoelectric performance of a device.

The invention discloses a preparation method and a product of a low-roughness polyimide film and application of the product. The preparation method comprises four steps, including synthesis and treatment of polyamide acid, curtain coating, pre-drying of the film and imidization, and the preparation method comprises the following concrete steps: taking biphenyl diamine and dianhydride as polyamide acid synthesizing monomers; controlling the temperature of a curtain coating substrate to be above 30 DEG C before film formation; drying and imidizing the film by adopting a programmable temperature increment mode, wherein the highest drying temperature is 130 DEG C; the highest imidization temperature is not lower than 450 DEG C. The prepared polyimide film is flat in surface, smaller than or equal to 10nm in surface roughness, larger than 300MPa in tensile strength, larger than 330 DEG C in glass-transition temperature, smaller than 1% in thermal shrinkage rate and smaller than 20ppm / DEG C in thermal expansion coefficient (CTE). The preparation method disclosed by the invention is safe in overall technological process, free of use of expensive equipment, simple in operation procedures and easy in control on surface appearance of the film.

The invention discloses an ultraviolet light detector of a lead-free double perovskite single crystal. The detector successively comprises a substrate, the lead-free double perovskite single crystal,an electrode, a silver colloid and a conductive gold wire from bottom to top. The lead-free double perovskite single crystal is formed by A, BI, BIII, and X. A molecular structural formula is A2BIBIIIX6, wherein the A is methylamine (MA) or Cs, the BI is Ag or Na, the BIII is Bi, Sb or In, and the X is Cl or I. A lead-free double perovskite single crystal material is selected from any one of Cs2AgInCl6, Cs2NaInCl6, MA2AgBiI6, and MA2AgSbI6. The type of double perovskite material solves a problem caused by biotoxicity of lead in traditional perovskite and has excellent photoelectric performance. Compared with a traditional perovskite material, the perovskite material of the invention has a high and rapid ultraviolet response. Good performance can be maintained in an air and humidity environment and good stability is achieved.

The invention belongs to the technical field of chemical industries, in particular to a method for preparing a graphene-phthalocyanin nano composite material by a mercaptan-alkene clicking chemical method. The method comprises the following steps: introducing a plurality of carbon-carbon double-bond functional group by chemically modified graphite oxide; selecting proper sulfydryl phthalocyanin; and preparing the functional graphene-phthalocyanin nano composite material at one step by mercaptan-alkene clicking chemical reaction. The invention does not use a heavy metal ion as a catalyst, solves the problems of loose combination, easy falling, and the like of a traditional phthalocyanin macromolecule on the surface of the grapheme and has favorable environmental protection and advancement.The method has the advantages of simplicity, convenience, one-step completion, no catalyst addition, low cost, no pollution to environment, wide application prospect, and the like. The graphene-phthalocyanin nano composite material product has higher photosensitivity, compatibility and thermostability and favorable dissolubility, film forming performance and photoelectric performance, is a new generation high-performance organic-inorganic nano composite photoelectric function material and can be applied to the fields of conducting materials, solar energy cell materials, photoelectric conducting materials, photoelectric converting materials, and the like.