200 results about "Light absorbance" patented technology

A liquid crystal composition contains a side chain type polymer liquid crystalline compound which can form a light absorption anisotropic film having a high alignment degree and has excellent solubility in a general-purpose solvent, a light absorption anisotropic film obtained using the composition, a laminate, and an image display device. The composition includes: a side chain type polymer liquid crystalline compound; and a dichroic substance, in which the compound is a copolymer having a repeating unit (1) containing a mesogenic group with a molecular weight of greater than 280 and a repeating unit (2) with a molecular weight of 280 or less, a content of the repeating unit (2) is less than 14% by mass with respect to a total mass of the compound, and a content of the dichroic substance is greater than 2% by mass with respect to a total solid content of the composition.

The application discloses a preparation method of self-floating assembled cerium-doped black niobium pentoxide and application thereof, and belongs to the technical field of photothermal conversion materials.The method comprises the following steps: raw material refining, hydrothermal reaction, carbon-embedded calcination growth, and surface modification treatment.The method solves the technical problems of existing photothermal materials, such as dependence on a substrate, narrow light absorption range, and large heat loss, enables photothermal nanoparticle materials to realize self-floating assembly in a seawater system, simultaneously has high absorption rates of visible light and near-infrared light, forms a high-efficiency thermal localization interface under the condition of not needing a substrate support, significantly improves photothermal conversion efficiency and long-term stability, and reduces seawater desalination cost.

DEPCT6907 / 10 / 2568 What is provided is an optical cell for receiving the sample in order to measure the concentration of the sample. Methods for measuring light absorption may improve operational capabilities and measurement accuracy. More than a typical device. Optical cell 2 for sample packing used in concentration meter sets for measurement. The sample concentration is measured using an absorbance method that includes a directional packed section 21. Longitudinal and short directions in the horizontal cross-section and 24 projections extending from the sides in the longitudinal direction. Along the length of the packing section 21 in the short direction;

The application provides an antifouling coating material, an antifouling coating and a preparation method and application thereof. The antifouling coating prepared from the antifouling coating material provided by the application has a water contact angle of 105.8-161.5 degrees and a sliding angle of 1.5-24.1 degrees in a wavelength range of 200-2500 nm; a light absorption rate of 65.7-98.3 %; and a maximum light-heat surface temperature of 45.1-82.8 DEG C under 1 solar light intensity. Moreover, the antifouling coating has synergistic antifouling of superhydrophobic low adhesion and biological repellence, wide-spectrum high-efficiency and controllable light-heat antifouling capacity, all-weather antifouling capacity facing the air-water interface of the sea, and excellent mechanical durability and light-heat / wetting performance stability.

This invention discloses a high-performance tin-based perovskite photodetector, its fabrication method, and its application in covert optical information transmission. The photodetector sequentially comprises a conductive substrate, an electron transport layer, a tin-based perovskite layer, a hole transport layer, and a metal electrode layer. The tin-based perovskite layer is FASnI3, and 1,4-butanediamine hydroiodate is introduced as a molecular additive to suppress Sn. 2+ Oxidation and reduction of defect state density optimize film quality. Based on this, FASnI3 perovskite films with an inverse opal structure were successfully prepared. The slow photon effect significantly enhances perovskite light absorption and promotes carrier transport, and the "lotus leaf effect" introduced by the photonic crystal significantly improves the stability of Sn-based perovskites. The photodetector prepared by this invention achieves highly sensitive, self-powered near-infrared detection under zero bias conditions, exhibiting high responsivity, high detectivity, low dark current, and excellent stability. It can be used in optical communication, information transmission, sensing, and security optoelectronic systems.

The application discloses a potassium tungsten bronze-based photo-thermal super-hydrophobic coating and a preparation method and application thereof; the preparation method of the coating is as follows: first organic solvent, a tungsten source and a potassium source are mixed at room temperature, and stirring is carried out under ultrasonic waves until the tungsten source is fully dissolved; the concentration of the tungsten source is controlled to be 15 mg / mL-27.5 mg / mL; reaction is carried out at 160-200 DEG C for 22-26 h; after the reaction is completed, washing and centrifugal separation are carried out, and then drying, grinding and petal-shaped potassium tungsten bronze powder are obtained; then, the petal-shaped potassium tungsten bronze powder is reacted with a hydrophobic modifier, and is added to a resin solution and a curing agent for reaction. The coating of the application can enhance near-light absorption performance and improve photo-thermal conversion efficiency without the assistance of nano-particles such as silicon dioxide, and can realize rapid removal of surface ice droplets.

An imaging optical system includes an infrared light absorbing element, an infrared light reducing film and a plate element in order along a paraxial path. The infrared light absorbing element is made of an infrared light absorbing plastic material, and the infrared light absorbing element is configured to refract a light. The infrared light reducing film is closer to an image surface of the imaging optical system than an incident surface of the infrared light absorbing element to the image surface of the imaging optical system. The plate element is disposed between the infrared light reducing film and the image surface, the plate element includes a translucent portion, a holder portion and a taper structure coating. The taper structure coating is disposed on at least one of an incident surface and an exit surface of the translucent portion.

To provide a liquid crystal composition capable of forming a light-absorbing anisotropic film in which planar irregularity is suppressed and orientation is excellent, a light-absorbing anisotropic film, a laminate, and an image display device. The liquid crystal composition of the present invention contains: a liquid crystal compound; a dichroic substance; a polymer 1 having a repeating unit A containing a structure represented by formula (A); and a polymer 2 having a repeating unit A containing a structure represented by formula (A) and being different from the polymer 1, in the liquid crystal composition, in a case where a content of silicon atoms contained in the polymer 1 is set to X1 parts by mass with respect to 100 parts by mass of total solid content of the liquid crystal composition, and a content of silicon atoms contained in the polymer 2 is set to X2 parts by mass, a ratio represented by X1 / X2 is 1 or more. In formula (A), X represents a substituent containing one or more structures represented by formula (a).

This invention relates to a method for amplifying the polarization ratio of a photodetector based on a two-dimensional semi-metallic material and a heterostructure, belonging to the field of photodetection technology. Based on a strategy combining a two-dimensional semi-metallic material and a heterostructure, a BP / MoS2 / WTe2 heterojunction is constructed, where BP is the light-absorbing layer, MoS2 is the barrier layer, and WTe2 is the contact layer. This invention not only achieves selective carrier transport and reduces dark current, but also allows WTe2 to reduce contact resistance and provide a fast carrier extraction channel, realizing asymmetric amplification of the photocurrent, thereby achieving active amplification of the polarization ratio even at zero bias. This invention breaks the limitation of the inherent anisotropy of materials on the magnitude of the polarization ratio, and uses a completely dry transfer process to fabricate polarization detection photodetectors, eliminating the need for additional polarization elements and chemical solution treatment. It boasts advantages such as simple process, low cost, high repeatability, and no pollution.

The present invention provides a protective film agent and a method for processing a workpiece, the protective film agent being capable of forming a protective film suitable for processing with a laser beam. The protective film agent is coated on a workpiece when the workpiece is processed, the protective film agent comprising: a water-soluble resin; a light absorber having a flavone structure, a flavonol structure, or an isoflavone structure; and a solvent that dissolves the resin and the light absorber.

One embodiment of the present invention provides a photodetector comprising a light-absorbing layer that is formed between an upper electrode and a lower electrode and contains a fluorine-based organic polymer and colloidal quantum dots. According to the embodiment, using the newly proposed light-absorbing layer enables reducing surface defects of the quantum dots in the photodetector while simultaneously improving operational stability.

A frontside-illuminated photodiode device is provided. The frontside-illuminated photodiode device includes a substrate, a mesa structure formed on an upper surface of the substrate and including a light absorption layer absorbing incident light irradiated through an upper side thereof, and a metal coating layer of a non-plane structure formed on a lower surface of the substrate and reflecting incident light, which is not absorbed by the light absorption layer, to be again absorbed by the light absorption layer.

The application discloses a kind of based on continuous gradual change micro-nano structure's bionic antireflection light-thermal sensing material and its preparation method, method includes the following steps, provide elastic substrate layer, intermediate conductive layer and upper layer heat-sensitive layer;Wherein, elastic substrate layer is high molecular elastic polymer, intermediate conductive layer includes silicone rubber and carbon nanotube blend, upper layer heat-sensitive layer includes silicone rubber, carbon black and carbon nanotube blend;Elastic substrate layer is formed into elastic plane material using heat curing or light curing mode, on its upper surface, spray conductive layer in normal temperature environment, after drying and annealing, obtain solidified intermediate conductive layer;Subsequently, with light-thermal sensitive layer again spraying, after heating and curing, obtain upper layer heat-sensitive layer, the application is through interface bionic structure, the synergic design of conductive material and light-thermal material, effectively improve the light absorption efficiency and response sensitivity of sensing material.

The present disclosure provides a light-emitting device, a manufacturing method thereof, and a display device. The light-emitting device includes: a substrate; a hole transport layer on the substrate; a quantum dot light-emitting layer on a side of the hole transport layer away from the substrate; and a first wavelength light absorbing molecule on a side of the hole transport layer away from the substrate. The first wavelength light absorbing molecule is configured to absorb a first wavelength light capable of causing the hole transport layer to undergo a crosslinking reaction.

The present invention increases on-state current of a semiconductor device. This semiconductor device (1) comprises a switch body (20) and a light-emitting element (10). The switch body (20) comprises a substrate (21), a channel layer (22) having a first band gap above the substrate (21), and a barrier layer (23) having a second band gap larger than the first band gap, in that order. Provided are a pair of electrodes (24, 25) provided above the barrier layer (23) so as to be apart from each other in a plan view of the substrate (21), and a pn gate layer (26) provided between at least a part of one electrode (24) and the other electrode (25) in a plan view of the substrate (21). The pn gate layer (26) includes a p-type layer (26p), an n-type layer (26n), and a light-absorbing layer (26a) provided between the p-type layer (26p) and the n-type layer (26n). The light-absorbing layer (26a) is capable of absorbing light of a wavelength longer than the wavelength band of light absorbed by the p-type layer (26p) and the n-type layer (26n), and absorbs light emitted by the light-emitting element (10).

This invention discloses a conjugated polymer photocatalyst, its preparation method, and its application in the photocatalytic synthesis of nitric acid, belonging to the fields of polymer materials and photocatalysis technology. The preparation method mainly includes: firstly, synthesizing the intermediate 2CzTPN-Br via a nucleophilic substitution reaction; subsequently, synthesizing the intermediate TBBA via esterification; and finally, copolymerizing the two via coupling polymerization to obtain the target catalyst. The preparation method of this invention is process-controllable, and the resulting catalyst does not require the participation of noble metals, exhibiting broad light absorption, high specific surface area, and excellent carrier separation efficiency. When applied to the photocatalytic synthesis of nitric acid, it can directly and efficiently convert nitrogen in the air into nitric acid under mild conditions of room temperature, air atmosphere, and water as a solvent, exhibiting excellent durability. After 324 hours of continuous light irradiation, the nitric acid yield can reach 4466.2 µmol g. ‑1 cat It has broad application prospects in the field of green synthesis.

The application relates to application of Bi2O2Se in a photocatalytic nitrogen fixation reaction and belongs to the technical field of photocatalytic nitrogen reduction. The BOS catalyst with intrinsic weak hole oxidation capacity realizes efficient and stable photocatalytic ammonia synthesis without a sacrificial agent. The BOS has an optimized narrow band gap structure and a unique straddling energy band arrangement, the valence band position is shallow, the hole oxidation capacity is weak, the oxidation degradation of NH4 + Can be effectively inhibited, and the conduction band position is suitable, so that the thermodynamic driving force of nitrogen reduction is ensured. The catalyst has excellent light absorption capacity in a wide spectral range (extending to the near-infrared region), and the apparent quantum efficiency reaches 0.12% at a wavelength of 700 nm. The ammonia synthesis rate of the BOS without a sacrificial agent reaches 61 muM.h ‑1 -1, which is 8.3 times and 2.8 times that of carbon nitride and cadmium sulfide, and the catalyst maintains high activity in an air atmosphere, has excellent oxygen compatibility and cycle stability.

This invention belongs to the field of optoelectronic devices and discloses a perovskite heterojunction blue-violet narrowband photosynapse and its application. The device uses a heterojunction composed of a poly[bis(4-phenyl)(2,4,6-trimethylphenyl)amine] (PTAA) hole-conducting layer and a perovskite thin film as its functional unit to achieve blue-violet narrowband photosynaptic function. By optimizing the thickness of the PTAA hole-conducting layer to suppress the short-wavelength ultraviolet light response, and by controlling the halogen atom type and ratio of the perovskite thin film to optimize the light absorption range of the film, the device generates a narrowband synaptic response only in the blue-violet light band with wavelengths in the range of 380nm to 490nm, thus realizing the blue-violet narrowband photosynaptic function. The device of this invention combines excellent blue-violet narrowband response, stable synaptic plasticity, and high anti-interference capability, exhibiting excellent performance in fields such as fingerprint recognition and possessing outstanding practical value.

This invention relates to the field of LED technology, and particularly to a high-efficiency violet LED epitaxial structure and its growth method. The epitaxial structure, from bottom to top, includes: a patterned AlGaN template substrate and a GaN-based epitaxial layer. The patterned AlGaN template substrate sequentially includes a growth substrate, a buffer layer, an AlGaN layer, and a mask layer, wherein the mask layer is a periodically patterned mask. The GaN-based epitaxial layer sequentially includes: an AlGaN capping layer, an n-type semiconductor layer, a stress relief layer, a multi-quantum-well active region, an electron blocking layer, and a p-type semiconductor layer. The n-type semiconductor includes an Alx3Ga1-x3N layer with an Al composition of 0.01 ≤ x3 ≤ 0.05 and x3 ≥ x2. This invention effectively blocks dislocation propagation and reduces defect density through the synergistic design of the patterned AlGaN template substrate and the laterally epitaxially grown AlGaN capping layer; and achieves progressive stress relief and light absorption suppression through the gradient increase of Al composition in each layer of the all-AlGaN-based structure.

The application discloses a kind of methane emission monitoring method, system, equipment and storage medium, it is applied to industrial computer in TDLAS system, it is related to gas detection technical field, comprising: obtaining laser electric signal and solving absorption intensity, and based on light absorption intensity, the methane path integral concentration data corresponding to each scanning angle is determined, the spatial interpolation and fitting of each scanning angle data are carried out, the methane concentration data are obtained, and the methane surface density is determined accordingly, with gas diffusion cross section as integral interval, the methane mass density is obtained by integrating surface density, in combination with real-time wind speed and monitoring time length, the real-time emission rate and total emission are calculated, to improve the accuracy of methane emission monitoring.

The application relates to the technical field of photovoltaic solar cells, and discloses a solar cell and a photovoltaic module. The solar cell comprises a silicon substrate, the silicon substrate has a first surface and a second surface arranged oppositely, a medium layer arranged on the second surface, and a doped layer arranged on the surface of the medium layer away from the silicon substrate, wherein the surface of the doped layer away from the medium layer has a plurality of submicron particles. In the application, the roughness of the doped layer can be effectively increased through the plurality of submicron particles on the surface of the doped layer away from the medium layer, the back surface reflection of the cell sheet can be reduced through the submicron particles, the light absorption capacity of the film layer can be improved, and the contact area with metal can be increased, so that the doped layer has better metal contact performance.

The present application relates to the technical field of porous polymer materials, and particularly relates to a covalent organic framework material with different flatness, a preparation method and application thereof. The method comprises the following steps: S10, preparing a first monomer through a coupling reaction; S20, mixing the first monomer, a second monomer, a catalyst and a solvent to perform a condensation reaction, so as to obtain the covalent organic framework material, wherein the condensation reaction is performed at a temperature of 60-180 DEG C, the first monomer comprises one or more of formulae 1-8, and the covalent organic framework material is purified; and S30, performing acidification or methylation treatment on the purified covalent organic framework material. Thus, the covalent organic framework material with different flatness prepared by the present application has a high conjugation degree, effectively enhances light absorption capacity, promotes separation and transfer of photo-generated carriers, and exhibits good light response characteristics and photocatalytic performance.

The application relates to the field of new energy technology, in particular to a ZnO NRs-based Schottky junction ultraviolet photodetector based on ZnAl-LDHs and a preparation method thereof. The ZnO NRs-based Schottky junction ultraviolet photodetector comprises, from bottom to top, a conductive glass substrate, a ZnO film, a ZnO NRs film, a ZnAl-LDHs film and an interdigital electrode, the thickness of the ZnO film is 200-300 nm, the thickness of the ZnO NRs film is 0.5-1.5 microns, and the thickness of the ZnAl-LDHs film is 30-50 nm. The ZnO NRs / ZnAl-LDHs has strong light absorption capacity, realizes wider spectrum and higher efficiency of ultraviolet light absorption, and greatly improves the light absorption efficiency. The defect states on the surface of the ZnO NRs are inhibited by the ZnAl-LDHs, the dark current is significantly reduced, the signal-to-noise ratio and the detection rate are improved, and the rectification characteristics and the built-in electric field are enhanced.

This invention discloses a photothermal synergistic phase change composite thin film based on a heterostructure and its preparation method, belonging to the technical field of nanomaterials and composite phase change materials. The composite thin film includes a heterostructured photothermal carrier film and a phase change material confined and loaded thereon. The heterostructured photothermal carrier film uses manganese oxide coated with a carbon layer as a framework, with heterostructured functional units composed of metal particles constructed in situ on its surface. Sodium manganate, as a precursor film for the heterostructure construction, is modified with a metal-organic coordination structure and derivatized in an inert atmosphere to form a heterostructure interface on its surface where the carbon layer and metal particles are coupled in situ, further confining and loading the phase change material. The carbon layer and metal particles form a tightly contacted interface structure on the manganese oxide surface, which enhances light absorption and regulates heat conduction behavior under illumination, thereby achieving efficient conversion of light energy into heat energy and synergistically completing the storage and release of heat energy with the phase change material. This invention effectively improves the photothermal conversion efficiency and thermal energy utilization performance of composite films by constructing a heterogeneous structure interface coupling carbon layers and metal particles. The resulting composite film has rapid heating, stable heat storage and good cycle stability, and has good application prospects in the fields of solar thermal storage and thermal management.

The application provides a hydrogen leakage detection device and method combining mid-infrared imaging and laser absorption spectroscopy, wherein: a TDLAS light source emits wavelength-modulated near-infrared laser; a dichroic mirror reflects the laser to a target area along a coaxial light path, simultaneously reflects a return signal and transmits mid-infrared radiation; a fine-tuning prism adjusts the direction of the mid-infrared radiation during calibration to establish a reference visual axis; an infrared imaging detection module receives the radiation for imaging; a laser return detection module receives the return and converts it into an electrical signal; a four-quadrant detector extracts a bypass light spot to generate optical axis deviation information; and an information processing module denoises and inverts the hydrogen concentration, and corrects the dichroic mirror according to the deviation information to ensure that the laser telemetry and the infrared imaging light path are collinear. The application solves at least one of the technical problems that the laser telemetry and the infrared imaging light path are inconsistent in the existing hydrogen leakage detection scheme, resulting in a mismatch between the detection path and the imaging area, and a lack of real-time monitoring and correction mechanism for optical axis deviation.

Exemplary semiconductor structures may include a plurality of LED structures and a backplane layer. Exemplary semiconductor structures may also include a light barrier region positioned between the LED structures and the backplane layer. The light barrier region may be operable to absorb light at wavelengths shorter than or about 300 nm and transmit light at wavelengths greater than or about 350.

The application provides a polymer carbon nitride@Hittorf red phosphorus heterostructure and application thereof in preparation of a medicine for targeted treatment of renal clear cell carcinoma, and belongs to the technical field of nano medicines. The application designs a near-infrared light response Hittorf red phosphorus (HP) modified polymer carbon nitride heterostructure (PCN@HP) based on a simple chemical vapor deposition (CVD) method. Experimental research finds that the HP nanorods vertically grown on the PCN exhibit wide and strong light absorption in the near-infrared range. In-vivo and in-vitro experiments prove that under near-infrared light irradiation, when the concentration of the suspension is 100 μg / mL, the tumor inhibition rate reaches 100%. Notably, the composite has no damage to normal tissues and cells, but it has obvious targeted inhibition effect on deep ccRCC cells in the body. In addition, the composite material has good biocompatibility and spontaneous light effect, and can be completely metabolized in the body within 48 hours, and is a kind of nanoparticle with imaging and PDT / PTT synergistic treatment, and can be used for efficient tumor nano treatment.

An imaging optical system, camera module, and electronic device are disclosed. The imaging optical system sequentially includes an infrared light-absorbing element, an infrared light-reducing film, and a flat panel element along a central optical path. The infrared light-absorbing element is an infrared light-absorbing plastic element used to refract light. The infrared light-reducing film is positioned closer to an imaging surface of the imaging optical system than an incident surface of the infrared light-absorbing element. The flat panel element is integrally formed and disposed between the infrared light-reducing film and the imaging surface. The flat panel element includes a light-transmitting portion and a support portion, wherein the light-transmitting portion is correspondingly disposed to the imaging surface, and the support portion surrounds the light-transmitting portion, keeping the light-transmitting portion at a specific position on the central optical path. This improves optical quality.

The application discloses a kind of hydrophilic photo-thermal covalent organic framework nanofiber materials and preparation method thereof, belong to photo-thermal material and seawater desalination field.For the technical problem that existing photo-thermal material is difficult to consider high efficient light absorption and fast water transport, first, homogeneous polymerization method is used, monomer containing sulfonic acid group and porphyrin monomer etc. occur polycondensation reaction in acetic acid aqueous solution, and the photo-thermal covalent organic framework dispersion is obtained by dialysis purification;Subsequently, the dispersion is freeze-dried, and the hydrophilic photo-thermal covalent organic framework nanofiber is obtained.The material uses porphyrin big π bond system as photo-thermal conversion core, and uses the rich sulfonic acid group and regular pore channel in framework to build efficient water transport network.The preparation process of the application is mild and controllable, and the obtained material has excellent broadband light absorption and hydrophilic ability, and has broad application prospect in the field of solar-driven interfacial seawater desalination.

In accordance with various embodiments of the present disclosure, a device for non-invasive medical imaging is provided. In some embodiments, the device comprises a photonic integrated circuit scale dual frequency comb (DFC), a hand-held wand, and at least one processing element. The wand comprises at least one emission point for emitting light from the DFC at a plurality of different wavelengths and at least three sensors. The wand directs the emitted light at one or more bodily structures. The sensors are adapted to detect acoustic waves from thermo-elastic changes in one or more elements within the bodily structures. The processing element is for generating an optical absorption spectrum from the detected acoustic waves, identifying one or more elements within the bodily structures based on the optical absorption spectrum, and generating a three-dimensional image of the elements based on the optical absorption spectrum from the detected acoustic waves.