37results about How to "Wide absorption wavelength range" patented technology

The invention discloses a novel three-junction thin-film solar cell, which comprises a glass substrate, a back electrode molybdenum layer, a multi-junction cell unit, a window layer and a reflection reducing layer arranged in sequence from bottom to top. The reflection reducing layer is provided with a gate electrode; the multi-junction cell unit consists of the following cell layers arranged in sequence from bottom to top: a P-type selenium-indium-copper layer, an N-type cadmium sulfide layer, a first P-type amorphous silicon layer, an intrinsic amorphous germanium-silicon layer, a first N-type amorphous silicon layer, a second P-type amorphous silicon layer, an intrinsic amorphous silicon layer and a second N-type amorphous silicon layer. The invention also discloses a production method of the novel three-junction thin-film solar cell, and the cell layers are manufactured respectively by magnetron sputtering, vacuum selenide annealing or vacuum evaporation. The characteristics of an a-Si/a-SiGe solar cell technology and a CuInSe2 thin-film solar cell are combined by the solar cell, the scope of the wavelength of solar light to be absorbed can be expanded to 500-1100nm, the rate of photoelectric conversion can be increased to 20 percent, and the manufacturing cost is low.

The invention relates to a perovskite solar cell composite photoelectric conversion layer and a preparation method therefor. The perovskite solar cell composite photoelectric conversion layer comprises a three-dimensional perovskite type photoelectric conversion material thin film and a polymerizable two-dimensional layered perovskite type photoelectric conversion material thin film; the composition of the polymerizable two-dimensional layered perovskite type photoelectric conversion material thin film is NMX<4>, wherein N is cyanuric acid, melamine, trithiocyanuric acid, ammonium triphosphate, amino cyclotriphosphazene or a mixture thereof; M is Pb<2+>, Sn<2+>, Ge<2+>, Cu<2+>, Ni<2+>, Mn<2+>, Zn<2+>, Fe<2+> or a mixture thereof; and X is Cl<->, Br<->, I<-> or a mixture thereof. The polymerizable two-dimensional layered perovskite type photoelectric conversion material is used as the material of a perovskite solar cell composite photoelectric conversion layer and a hole transport layer at the same time, so that the large-area perovskite solar cell preparation process is simplified, and the photoelectric conversion efficiency can be stabilized and improved.

The invention provides a laminated solar cell. The solar cell comprises a top cell and a bottom cell which are superposed. The top cell is a perovskite cell. The perovskite cell comprises a bromine doped CH3NH3PbI3 film. The bottom cell is a cadmium telluride cell. Compared with the prior art, by using the cell of the invention, a forbidden bandwidth of the perovskite cell can be changed in a range of 1.57eV to 2.30eV along with a bromine-doped proportion change, a forbidden bandwidth of the cadmium telluride cell is 1.43eV, the perovskite cell is taken as the top cell, the cadmium telluride cell is taken as the bottom cell, and the manufactured laminated cell can widen absorption wavelength ranges of the two cells to sunlight; cell conversion efficiency is increased, and a requirement toa cadmium sulfide thickness is reduced, which is good for reducing manufacturing cost; simultaneously, photon-generated carrier energy generated by light with a short wave length in the perovskite cell of a wide forbidden band is increased and an open-circuit voltage of the laminated cell is increased too.

The invention provides an adsorption/flocculation/photocatalysis composite dye wastewater treatment agent and a wastewater treatment method, and relates to the technical field of wastewater treatment.The adsorption/flocculation/photocatalysis composite dye wastewater treatment agent is prepared from the following raw materials (by weight): 0.1-0.5 part f cerium and gadolinium codoped nano-TiO2, 60-80 parts of PDMDAAC modified diatomite and 20-35 parts of an inorganic polymer flocculant. By combining adsorption, flocculation and photocatalysis and selecting appropriate raw materials, the prepared wastewater treatment agent has excellent treatment effect on dye wastewater, and has high decolorization rate, high COD removal rate and good degradation effect.

The invention relates to a thioxanthone photoinitiator containing sulfydryl and initiator aid amine and a preparation method of the thioxanthone. The preparation method comprises the following steps: by using a thioxanthone derivative containing an epoxy group as a raw material, firstly, converting the epoxy group into a circular thiocarbonate group by adding carbon disulfide which is reacted with the thioxanthone derivative containing the epoxy group; and then, carrying out a ring-opening reaction with amine containing a benzene ring to obtain the thioxanthone photoinitiator containing sulfydryl and initiator aid amine, wherein the obtained compound is of a good photo-initiating effect; R1, R2 and R3 are independently selected from hydrogen, halogen, hydroxyl, and C1-C22 alkyl; R4 is selected from H, C1-C2 alkane groups or benzyl; and R5 is selected from aromatic alkyls such as benzyl, phenethyl, phenylpropyl, and phenylbutyl containing benzene rings.

The invention discloses an active and passive hybrid mode-locked optical fiber laser with a temperature compensation function, and belongs to the technical field of optical communication devices. The main structure comprises an active mode-locked optical fiber layer resonant cavity, a temperature compensation system, a passive mode-locked optical fiber laser system and a pulse optimizing system, wherein the active mode-locked optical fiber layer resonant cavity is formed by a pumping light source (1), a wavelength-division multiplexer (2), a first optical coupler (3), an adjustable optical fiber filter (4); the temperature compensation system is formed by absolute ethyl alcohol filled photonic crystal fiber (27), a third optical probe (28) and a second amplifying circuit (29); the passive mode-locked optical fiber laser system is formed by dispersion compensation optical fiber (22) and a black phosphorus saturable absorber (21); the pulse optimizing system is formed by two feedback control rings. Active and passive hybrid mode locking is adopted, a feedback technology is used for conducting automatic feedback control over active and passive hybrid mode-locked optical fiber laser systems, the optical fiber laser has the temperature compensation function, and optical pulses in the system can be optimized better and stable.

The invention discloses anti-aging polyethylene color masterbatch. The anti-aging polyethylene color masterbatch is prepared from, by weight, 60-90 parts of polyethylene, 20-30 parts of inorganic pigments, 2-3 parts of a composite dispersion agent, 2-3 parts of an ultraviolet absorber, 20-30 parts of bamboo charcoal fibers, 1-2 parts of a phenol antioxidant 1010 and 1-2 parts of filler. The polyethylene color masterbatch is low in cost, safe and environmentally friendly and contains bamboo charcoal fibers, the antibacterial rate reaches 90% or above, and low ultraviolet transmittance is realized; by adoption of phenyl salicylate and 2-hydroxyl-4-methoxybenzophenone as the ultraviolet absorber, high resin compatibility and wide absorption wavelength range are realized, and effects of a stabilizing agent and a plasticizer are achieved. In application to coloring of polyethylene products, the anti-aging polyethylene color masterbatch has advantages of high aging resistance, uniformity incoloring, freeness of discoloration, high antibacterial rate, low consumption, freeness of influences on mechanical performances of the products and the like, and the service life of the polyethylenematerial is greatly prolonged.

The invention belongs to the technical field of organic synthesis, and particularly relates to a diisoindole iridium (III) complex which is characterized in that the structural general formula of the diisoindole iridium (III) complex is as shown in a formula I defined in the description, wherein R1, R2 and R3 are respectively and independently selected from one of H, alkyl with the carbon atom number of 1-12 and naphthenic base with the carbon atom number of 3-12; and Ar1 and Ar2 are each independently selected from a group containing an aromatic ring. The diisoindole iridium (III) complex has structural diversity and high molar absorption coefficient, the maximum absorption wavelength can reach a near-infrared region, and the diisoindole iridium (III) complex has good application prospects in the fields of biomedicine, material science and the like as a photosensitizer, an imaging reagent, a strong near-infrared absorber and the like.

The invention relates to the technical field of high polymer materials, in particular to an organic silicone adhesive containing a nano-silver material and a preparation method thereof. The organic silicone adhesive is prepared from the following components: vinyl-terminated methyl phenyl polysiloxane, an amine compound, terminal group hydrogen-containing polysiloxane, o-hydroxybenzophenone, nano-silver, a toughening agent, heat-resistant filler, a curing agent and a platinum catalyst, and has an antibacterial function, and is better in durability and long in service life. The preparation method comprises the following steps of weighing vinyl-terminated methyl phenyl polysiloxane, the amine compound, the terminal group hydrogen-containing polysiloxane, the toughening agent and the platinumcatalyst, and adding the materials into a sealed reaction device for heating under the protection of inert gas, adding the nano-silver and the heat-resistant filler, and stirring, then adding o-hydroxybenzophenone and the curing agent, and continuously stirring, decompressing to remove bubbles, and heating and curing to obtain an organic silicone adhesive. The preparation process is simple, the obtained organic silicone adhesive is good in antibacterial effect, and the durability of the organic silicone adhesive is improved.

The invention belongs to the field of preparation of inorganic functional materials, and particularly relates to a medium-long-wave infrared wide-spectrum light absorption material and a preparation method thereof, the medium-long-wave infrared wide-spectrum light absorption material is formed by sequentially stacking an alumina pore structure, a silicon pore structure, a silicon nano-pore structure and a silicon substrate; and the silicon nanopore structures are distributed in the silicon hole structures and the silicon substrate. The medium-long-wave infrared wide-spectrum light absorption material is formed by stacking four layers of materials in sequence, a refractive index gradient material is formed, and high-temperature-resistant wide-spectrum light absorption of medium-far infraredbands is achieved through free carrier absorption of a silicon material with the adjustable doping concentration in the medium-long-wave infrared bands. The medium-long wave infrared wide-spectrum light absorption material is large in absorption wavelength range, high in absorption efficiency, small in absorption layer thickness, free of polarization dependence, large in incident angle range andresistant to high temperature.

The invention discloses cyan color-forming coating liquid used in color photographic paper and the color photographic paper formed by using the same. The cyan color-forming coating liquid is preparedfrom the following components in percentage by weight: 4 to 7 percent of 2-(4-t-butyl)phenyl-6-cyano-5-[bis(ethoxycarboxymethyl)carbamoyloxy]-1H-pyrrolo[1,2-b][1,2,4]triazole-7-methylcyclohexyl-2,6-bis-t-butyl-4-carboxylate and 1.5 to 3 percent of 2-[2,4-bis(1,1-dimethylpropyl)phenoxy]-N-(3,5-dichloro-4-ethyl-2-hydroxyphenyl)butyrylamide. The range of the absorption wavelength of the cyan color development curve of a coating can be expanded to 600nm to 650nm.