7results about How to "Broad absorption spectrum" patented technology

The application discloses a preparation method of carbon dot material based on blue bacteria, and the carbon dot material is prepared by taking blue bacteria photosystem pigment as raw material. The semiconductor fluorescent carbon dot prepared by the method has stable properties, has wide spectrum absorption to sunlight, can convert ultraviolet light, visible light and infrared light into red light, and has good photoelectric performance. The application further discloses a preparation method of a blue bacteria-based semiconductor fluorescent carbon dot-blue bacteria hybrid, and application of the carbon dot material based on blue bacteria in crop production.

The invention discloses a carbon quantum dot photosensitizer, an extracellular vesicle prepared from the carbon quantum dot photosensitizer and application of the carbon quantum dot photosensitizer. The carbon quantum dot photosensitizer is prepared by a method comprising the following steps: uniformly dispersing a polythiophene derivative in a sodium hydroxide aqueous solution to obtain a solution A; heating the solution A for reaction; and after the reaction is finished, cooling to room temperature, taking out the solution, and filtering and dialyzing to obtain the carbon quantum dot photosensitizer. According to the technical scheme, the problems that extracellular vesicles are complex and tedious in preparation and difficult in mass production are solved, and the method is simple in process, good in universality, low in time consumption and low in cost.

The application discloses a balsa wood / poly-p-phenylenediamine / polyvinyl alcohol solar energy evaporator and a preparation method thereof. NaClO2 and CH3COOH remaining in delignified balsa wood are used as oxidants to drive in-situ polymerization of p-phenylenediamine in a delignified balsa wood matrix, and the reuse of NaClO2 and CH3COOH is realized. The balsa wood / poly-p-phenylenediamine / polyvinyl alcohol evaporator prepared by the application has the characteristics of wide spectrum absorption, fast water transport, effective heat confinement and effective reduction of water evaporation enthalpy, and exhibits excellent solar energy driven interface water evaporation performance.

The application discloses a novel small-molecule electron acceptor material, a preparation method thereof and an organic solar cell, and relates to the technical field of organic solar cells. λ onset The small-molecule electron acceptor material has a high-efficiency near-infrared spectrum (greater than 1000 nm) response and a low open-circuit voltage loss. The selenium phenol unit is introduced, the polarizability of selenium atoms and the heavy atom effect are utilized, the intermolecular interaction is enhanced, and the absorption spectrum of the molecule is widened; through side chain modification, multiple intramolecular oxygen-sulfur non-covalent interactions are introduced, on the one hand, the intramolecular ICT effect is enhanced, the band gap is reduced, on the other hand, the multiple oxygen-sulfur non-covalent bonds lock the molecular configuration, the molecular rigidity is enhanced, vibration is inhibited, non-radiative recombination and open-circuit voltage loss are reduced. λ onset The application is applied to organic solar cell single-junction and tandem devices, and the photovoltaic response characteristics of more than 1000 nm are realized, and energy conversion efficiencies of more than 17% and 21% are obtained, which are the highest device efficiencies of the spectrum response of more than 1000 nm in the current research field of organic solar cells.

The application discloses a conjugated non-fullerene acceptor material with azaparacyclophanquinone as a core, and a structural general formula is shown as formula I: wherein R1 and R2 are C m H 2m+1 , m is greater than or equal to 1 and is an integer; and X is any one of H, F, Cl, Br and CN. The acceptor material has excellent performance, three-dimensional charge transport characteristics and good intermolecular stacking effect, and high electron mobility. When the material is applied to a binary organic photodetector, the material exhibits excellent near-infrared light detection performance, including high specific detectivity, high responsivity, fast response speed and low dark current density.

The application discloses a heteroatom conjugated extended asymmetric viologen derivative, a preparation method thereof and application of the viologen derivative in a black electrochromic device, and has the general structure as shown in the following formula: wherein Ar represents a benzothiadiazole or a thiophene heteroatom conjugated bridging unit, R1 is a benzyl aromatic substituent, and R2 is a polymerizable alkenyl functional group. The viologen molecule is designed through a conjugated skeleton of "acceptor-bridge-acceptor", a molecular internal charge transfer effect is significantly enhanced, and a reduced state absorption spectrum is effectively widened. The viologen molecule is compounded with a complementary agent for an electrochromic device, spectrum complementary absorption of the two in an ultraviolet-visible light region is utilized, full spectrum coverage in a visible light band is realized, and a high-performance black electrochromic effect is obtained. The material system has wide application prospects in the fields of flexible intelligent display, self-adaptive camouflage, full-shading intelligent window and the like.

The application discloses an aggregation-induced emission material, a preparation method and application thereof, and belongs to the technical field of preparation of the aggregation-induced emission material. The aggregation-induced emission material prepared by the application is an organic small molecule with an aggregation-induced emission effect. The fluorescent solar concentrator prepared by using the aggregation-induced emission material overcomes the problem of low efficiency of the existing fluorescent solar concentrator, and especially overcomes the problem of great efficiency attenuation caused by the increase of the device size.