2286 results about "Light absorbance" patented technology

The invention discloses a continuous monitoring method for neonatal jaundice and a related device. The method comprises the steps that a sensor module arranged on a patch or a bracelet is used for percutaneously measuring the bilirubin level of a neonate; the measurement data of the photoelectric sensor is corrected according to the data of the temperature sensor, the bilirubin level of the newborn is calculated through a preset bilirubin model based on the corrected data of the photoelectric sensor, and the preset bilirubin model comprises a light absorption model and a dynamic correction model; establishing a relation model of light absorption and bilirubin concentration by the light absorption model; the dynamic correction model adjusts parameters of the light absorption model; and transmitting the bilirubin level to a remote server, and when the bilirubin level exceeds a preset alarm threshold, generating an alarm signal and pushing the alarm signal to a medical staff client and / or a parent client. According to the invention, personalized continuous monitoring of neonatal jaundice is realized through a dynamic correction model, an intelligent alarm threshold, closed-loop control and auxiliary treatment means.

A light absorber 10 has a transmission spectrum satisfying the following requirements (I), (II), (III), (IV), and (V) at an incident angle of 0°. The light absorber 10 has a haze less than 0.20%. (I) An average transmittance TA0deg(460-600) is 75% or more. (II) A shorter cut-off wavelength λH0deg(s) is in a range of 390 nm to 450 nm. (III) A longer cut-off wavelength λH0deg(L) is in a range of 600 nm to 680 nm. (IV) An average TA0deg(300-380) is 1.2% or less. (V) An average TA0deg(750-1000) is 1.2% or less.

The invention provides an endangered animal monitoring method based on a multi-mode floating gate type photoelectric synapse transistor, realizes multi-mode fusion of images (optical signals) and sounds (electric signals) by utilizing the light absorption capability of quantum dots and the high carrier mobility of a two-dimensional channel material, and belongs to the technical field of sensing, storage and calculation integration and endangered animal identification and monitoring. According to the method, a photoelectric synapse device is used as a reservoir, and input time sequence signals are respectively applied to a multi-mode fused photoelectric synapse transistor in the form of light and electric pulse. And along with the co-stimulation of light and electric pulse, the change response of source-drain current is generated, and the fusion processing of the multi-mode signal is realized. By adopting the method, a human multi-sensory fusion signal processing mode is successfully simulated, and accurate recognition under complex and changeable conditions can be realized by utilizing a mode of complementation of visual signals and auditory signals. Under an extreme environment or a high noise condition, edge processing and identification can be carried out on pictures and sounds of endangered animals, and a high-accuracy monitoring result can be obtained without a large amount of data return, so that the energy consumption is reduced and the monitoring efficiency is enhanced.

A photoacoustic catheter adapted for placement within a blood vessel having a vessel wall includes an elongate shaft, a balloon and a photoacoustic transducer. The elongate shaft can extend from a proximal region to a distal region. The elongate shaft can include a light guide that is configured to be placed in optical communication with a light source. The balloon is coupled to the elongate shaft, and can be configured to expand from a collapsed configuration suitable for advancing the photoacoustic catheter through a patient's vasculature to a first expanded configuration suitable for anchoring the photoacoustic catheter in position relative to a treatment site. The photoacoustic transducer can be disposed on a surface of the balloon and in optical communication with the light guide. The photoacoustic transducer can include a light-absorbing material and a thermal expansion material.

An optical detector system providing electrical output signals. The system includes an apertured surface and a transparent window, with a metasurface on the window's opposite side. The metasurface imparts spatially varying phase delay and / or amplitude or polarization modulation to deflect ILR based on their angle of incidence, producing exiting light rays. These rays are detected by a two-dimensional tetralateral position-sensing detector (TLD) with a single resistive photo-absorption layer and four electrodes. The TLD generates X-Y position signals proportional to the azimuth and elevation of the incoming ILR. A computer may be included to calculate these angular values from the position signals.

The invention discloses a quasi one-dimensional (TaSe4) 2I and two-dimensional MoTe2 mixed-dimensional heterojunction phototransistor detector and a preparation method thereof, the detector sequentially comprises a Si substrate, a SiO2 gate dielectric layer, a quasi one-dimensional (TaSe4) 2I and two-dimensional MoTe2 nano film from bottom to top, the quasi one-dimensional (TaSe4) 2I and MoTe2 nano film are respectively provided with a metal electrode, and a heterostructure of the (TaSe4) 2I, the MoTe2 and the metal electrodes is formed. The preparation method comprises the following steps: (1) transferring the (TaSe4) 2I nanowire to the Si substrate; (2) transferring the MoTe2 nano film to one side of the (TaSe4) 2I nanowire; (3) preparing a pattern of a bottom electrode; (4) positioning, exposing and developing the pattern of the bottom electrode to expose the electrode part needing to be evaporated; and (5) preparing a metal electrode. According to the invention, the composite effect of a (TaSe4) 2I / MoTe2 heterojunction is utilized, and dark current is inhibited through a vertical structure; moTe2 is utilized to increase light absorption, and meanwhile, grid voltage is applied, so that light current is improved, and high responsivity and external quantum efficiency are obtained.

The invention discloses a doped material based on a hexagonal boron nitride / titanium dioxide heterojunction and a preparation method thereof. According to the material, a heterojunction is formed by hexagonal boron nitride and titanium dioxide, and the light absorption performance, the carrier mobility and the photocatalytic efficiency are optimized by doping a nitrogen element, an iron element and a fluorine element; wherein the doped nitrogen element can reduce a band gap by introducing a defect energy level, and broaden a light absorption range to a visible light region and an infrared light region; the doped iron element can promote carrier separation by introducing an intermediate energy level; the doped fluorine element can inhibit carrier recombination by reducing surface defects. The light absorption efficiency of the material in the ultraviolet light range can be improved by constructing the layered # imgabs0 # heterojunction composite material, and the migration rate of electrons and holes can be improved by doping the N element, the Fe element and the F element in the # imgabs1 #, so that the oxidation-reduction reaction is promoted, and reference significance is provided for further improving the application effect of a photocatalyst in sewage treatment.

The invention discloses a full-polarized light acoustic imaging method and device based on a vector absorption ball. The method comprises the following steps: expressing light absorption characteristics of a sample by establishing a mathematical model of the vector absorption ball; measuring the absorption intensity of the sample absorber under the exciting light in different polarization states through a photoacoustic signal; reconstructing a vector absorption ball of each point of the sample according to the absorption intensity of each point of the sample under different polarized exciting light; five structural parameters are extracted through the vector absorption balls at all points of the sample to reconstruct a structural characteristic diagram of the sample; the full-polarized light acoustic imaging device based on the vector absorption ball comprises a polarized pulse light modulation excitation module, a signal detection module, a two-dimensional scanning module and a signal processing module. The method provided by the invention overcomes the defect that the polarization absorption of the sample cannot be completely expressed by the traditional polarized light acoustic imaging, and realizes the measurement of the full-polarization absorption characteristic and the complete structure expression of the corresponding sample in the same set of light path.

The invention provides a data processing method and system for an aerosol analyzer, and belongs to the technical field of data processing of aerosol analyzers, and the method comprises the following steps: collecting light absorption signals of aerosol particles according to a light source system and a detector, and generating an original electric signal; preprocessing the original electric signal to obtain preprocessed data; extracting an absorption coefficient, a multiband light attenuation characteristic and a mass concentration parameter of the black carbon aerosol from the preprocessed data; analyzing the features based on a machine learning model, outputting a real-time prediction result of the concentration of the black carbon aerosol, and preprocessing the original electric signal to obtain preprocessed data, including the step of noise removal. According to the method, baseline drift is dynamically corrected through a polynomial fitting algorithm, wavelet transform denoising and a machine learning model are combined, the accuracy and real-time performance of black carbon aerosol concentration detection are remarkably improved, and the problems that in a traditional method, manual intervention is much, and the model generalization ability is poor are solved.

The invention provides a single-photon avalanche diode and a single-photon detector, and relates to the technical field of semiconductor photoelectric detection, and the single-photon avalanche diode comprises a plurality of avalanche diode units. The avalanche diode units are sequentially stacked in the propagation direction of incident light to be detected. Each avalanche diode unit is provided with an electric field control module which is used for independently adjusting the bias electric field of each avalanche diode unit. In the propagation direction of the incident light, the avalanche diode unit of the next stage is used for absorbing the remaining photons which are not absorbed by the avalanche diode unit of the previous stage and generating carriers, so that avalanche current is formed. The light absorption wavelength ranges of adjacent avalanche diode units are at least partially overlapped. The single-photon avalanche diode solves the problem that the existing single-photon avalanche diode cannot balance high detection efficiency and low dark current, and achieves the purpose of improving the detection efficiency of a single-photon detector on the premise of not increasing the dark current.

Disclosed in the present application is a photovoltaic module, comprising a reflective structure and a cell string group, wherein the cell string group comprises a plurality of cells, and gaps are provided between the plurality of cells; the orthographic projection of the reflective structure on the cell string group covers at least the gaps between the plurality of cells; and the reflective structure comprises a first reflective layer close to the cells and a second reflective layer stacked with the first reflective layer, the first reflective layer is an organic material layer, and the second reflective layer is a metal layer. In the embodiments of the present application, infrared light that is incident on the gaps between the plurality of cells is reflected by the reflective structure, so that the infrared light re-irradiates the cells, enabling the cells to absorb the infrared light and convert same into electric energy, thereby increasing the generation power of the photovoltaic module.

The invention discloses an ultra-compact near-infrared circularly polarized photoelectric detector, which comprises an upper metal electrode plating layer, a lower metal electrode plating layer, a semiconductor substrate, a hexagonal close packing array substrate and a chiral super-surface layer, and can realize rapid and high-responsivity near-infrared circular polarization dependent light detection, and light signals can be directly converted into visible electric signals under zero bias voltage; different photoelectric signal conversion effects can be generated from different directions under irradiation of light with different wavelengths, and reference is provided for preparation of a multi-mode near-infrared circularly polarized photoelectric detector. The invention also discloses a preparation method of the ultra-compact near-infrared circularly polarized photoelectric detector, the preparation method is simple and convenient, the cost is relatively low, batch preparation can be realized, and the produced ultra-compact near-infrared circularly polarized photoelectric detector has the characteristics of high light absorbance, quick response and ultrahigh integration level.

A light absorption filter that contains a resin; a dye having a main absorption wavelength band in a wavelength range of 400 to 700 nm, including at least one of a specific azo-based coloring agent represented by any of General Formulae (i) to (iv) or a specific indoaniline-based coloring agent represented by General Formula (v); and a compound that generates a radical upon ultraviolet irradiation. There is also an optical filter that uses the light absorption filter and a manufacturing method for the optical filter, as well as an organic electroluminescent display device, an inorganic electroluminescent display device, or a liquid crystal display device, which includes the optical filter.

The invention provides a Cu2O-based heterogeneous composite material as well as a preparation method and application thereof. The preparation method comprises the following steps: coating the surface of a Cu2O hollow sphere substrate with a carbon layer, and depositing layered double hydroxides (LDHs) and metal palladium (Pd) nanoparticles on the carbon layer. According to the material, through a Cu2O-carbon layer-LDHs-Pd multistage heterostructure design, space optimization of light absorption, charge transfer and catalytic sites is realized; cu2O-carbon layer-LDHs interface coupling promotes directed migration of photo-induced electron-hole pairs, and the surface plasmon resonance effect of Pd nanoparticles enhances the charge separation efficiency; the LDHs optimizes a charge transfer path through surface oxygen vacancy or metal valence cycle, so that synergistic oxidation of non-free radicals and free radicals is realized, the organic matter degradation efficiency is remarkably improved, the oxidation path is widened, and the performance bottleneck of a single material is broken through.

The invention relates to a high-speed low-dark-current three-step structure avalanche photodetector and a preparation method thereof, and belongs to the technical field of semiconductor devices. Comprising an intrinsic InP substrate, an N-type InAlAs ohmic contact layer, an intrinsic InAlAs transition layer, an N-type InAlAs charge layer, an intrinsic InAlAs multiplication layer, a P-type InAlAs charge layer, an intrinsic InAlGaAs transition layer, an intrinsic InGaAs absorption layer, a gradient-doped P-type InGaAs absorption layer and a P-type InAlAs ohmic contact layer which are stacked from bottom to top. The intrinsic InGaAs absorption layer 8 and the N-type InAlAs ohmic contact layer 2 are both of a step structure so as to form a three-stage step structure of the photoelectric detector. According to the invention, through growing the SiNx antireflection film with the refractive index of 1.85 and the thickness of 210 nm on the light incident surface, the reflectivity of incident light can be less than 1%. For an optical signal with the wavelength of 1550 nm, the single light absorption quantum efficiency can reach 0.45.

The invention relates to an underwater image restoration method based on multi-modal visual guidance and characteristic decomposition, which is used for solving the problems in the prior art that color distortion and contrast reduction of an image are caused by light absorption due to gradual attenuation of light with different wavelengths in water, and the light is scattered when encountering particles in the water, so that the image cannot be restored. And the problems of image blurring and detail loss are solved. According to the scheme, multi-mode prompt learning is adopted, complementarity among multiple modes is utilized, and features from different modes are integrated into prompt information so as to support color and contrast recovery of underwater images; and extracting high-frequency information from the RGB modal features by using learnable wavelets, and focusing on fine and difficult-to-perceive detail areas in the high-frequency features by using a high-frequency mixed attention module so as to recover the definition of textures in the underwater image.

A spectroscopic apparatus including an analysis optical system, a length measuring optical system, and a calculation apparatus and performing spectroscopic analysis of a sample, the analysis optical system including a moving mirror having a first reflection surface and a second reflection surface, the moving mirror configured to be translated, a gas cell configured to encapsulate a gas and add a light absorption signal to the analysis light, and a first light receiver configured to receive the analysis light containing a sample derived signal, a first modulation signal, and the light absorption signal, the length measuring optical system including a length measuring optical system configured to acquire a displacement signal corresponding to the position of the moving mirror from laser light reflected off the second reflection surface, the calculation apparatus including a moving mirror position calculator, a light intensity calculator, a Fourier transformer, and a moving mirror position correction section.

The invention relates to the technical field of optical materials and nano structures, in particular to an ultraviolet broadband light absorber based on graphene and a multi-layer periodic structure. The structure of the ultraviolet broadband light absorber sequentially comprises a graphene layer, a distributed Bragg reflection grating structure layer and a SiO2 substrate at the bottom from top to bottom. The preparation process of the ultraviolet broadband light absorber comprises the following steps: preparing the graphene layer; a SiO2 layer is deposited; depositing a TiO2 layer; carrying out multi-layer superposition; adding a graphene layer; and completing the device. The light absorption efficiency of graphene in the ultraviolet band is greatly improved, broadband efficient absorption within the wavelength range of 240-370 nm is achieved, the highest absorption rate can reach 99.75%, the absorber is not sensitive to polarization, the preparation process is simple, and technical support is provided for design of the efficient ultraviolet absorber.

A light absorption probe includes an arm segment, a main segment located at one side of the arm segment, a testing segment connected to another side of the arm segment, and a light absorption coating layer. The main segment has a soldering end portion and an extending end portion respectively located at two opposite sides thereof along a predetermined direction. The testing segment has an upright shape along the predetermined direction and includes a pinpoint portion and an upright portion that connects the pinpoint portion and the arm segment. The light absorption coating layer covers the upright portion, and the pinpoint portion is exposed from the light absorption coating layer. Through the light absorption coating layer, the testing segment only forms an observation point at the pinpoint portion in an observation process of a detection apparatus.

The invention discloses a preparation method for effectively reducing defects of a perovskite solar cell body. A 4-fluorobenzenesulfonamide additive is introduced into a perovskite precursor solution, a sulfonyl group, a fluorine group and the like are coordinated with lead in perovskite, the crystallization process of the film is regulated and controlled, nucleation and crystal growth of an organic lead halide perovskite light absorption layer are effectively controlled, meanwhile, non-radiative recombination is inhibited, charge transfer is promoted, and the photoelectric conversion efficiency is improved. The photoelectric conversion efficiency is obviously improved, the cost is reduced and the repeatability is good. The additive is introduced by a solution method, the process is simple and the cost is low. Experimental results show that after the 4-fluorobenzenesulfonamide additive is used, the trap state density of a perovskite layer is reduced from 4.45 * 10 < 15 > cm <-3 > to 3.26 * 10 < 15 > cm <-3 >, and the photoelectric conversion efficiency of a perovskite cell is improved from 22.20% to 24.15%. The invention provides an efficient and low-cost solution for defect passivation of the perovskite solar cell.

The invention relates to a light / heat / magnetic detachable high-strength polyurethane adhesive as well as a preparation method and application thereof. The light / heat / magnetic detachable high-strength polyurethane adhesive comprises a polyurethane adhesive and a functional filler. According to the light / heat / magnetic detachable high-strength polyurethane adhesive prepared by the preparation method disclosed by the invention, the colloid is black, and the adhesive has excellent light absorption performance and can realize rapid separation of an adhesive interface under infrared irradiation through a heat effect; meanwhile, the ferroferric oxide can be vibrated and heated under the action of an external magnetic field due to the magnetic response characteristic of the ferroferric oxide, so that fracture and separation of the adhesive layer are promoted. By means of the technology, efficient and reversible disassembly of parts bonded through the hot melt adhesive is achieved, possibility is provided for recycling and reusing of bonding materials and devices, and the problem that traditional polyurethane hot melt adhesive cannot be recycled is solved.

The invention discloses a fano resonance-based color radiation refrigeration film and a preparation method thereof, the film comprises a structure M1D1M2D1AD 'which are sequentially stacked from bottom to top, the structure of the film is an asymmetric structure, M1 represents a first metal layer, M2 represents a second metal layer, A represents an absorption layer, D1 represents a first dielectric layer, and D' represents a symmetrical dielectric layer unit of a film material; the M1D1M2 structure is in a discrete state and serves as a narrow-band light absorber, the M2D1AD'structure is in a continuous state and serves as a broadband light absorber, D 'serves as an antireflection layer in a continuous state, and the narrow-band light absorber and the broadband light absorber are coupled by sharing the second metal layer M2 to achieve fano resonance. The high-purity and color-adjustable reflection type structural color is achieved, the high reflectivity is achieved in the solar spectrum wave band, the high emissivity is achieved in the atmosphere window, and therefore the excellent radiation refrigeration effect is achieved.

The invention provides an optical transparency-optical confinement composite nanofiber membrane as well as a preparation method and application thereof. The optical transparency-optical confinement composite nanofiber membrane comprises a PDMS (Polydimethylsiloxane) / PS (Polystyrene) / TPU (Thermoplastic Polyurethane) nanofiber membrane and a photothermal conversion material layer loaded on the PDMS / PS / TPU nanofiber membrane, the PDMS / PS / TPU nanofiber membrane is prepared by taking PDMS, PS and TPU as raw materials and adopting an electrostatic spinning technology; the photothermal conversion material layer comprises honeycomb porous carbon nanofibers and PDA (Personal Digital Assistant). The optical transparency-optical confinement composite nanofiber membrane and the PDMS / PS / TPU nanofiber membrane have excellent light transmittance and hydrophobicity, the photo-thermal conversion material layer has excellent light absorptivity and high photo-thermal conversion capacity, and the optical transparency-optical confinement composite nanofiber membrane has high membrane flux when being used for photo-thermal membrane distillation desalination. And the photo-thermal film is excellent in distillation performance stability.

The invention discloses a cascade avalanche multiplication photodiode, wherein a substrate oxide layer is provided on a substrate, and a p-type electrode layer I, a p-type light absorption layer, an electric field regulation layer I, an avalanche multiplication layer I, an n-type transition layer, an electron traveling layer with a low impurity concentration, an electric field regulation layer II, an avalanche multiplication layer II, and an n-type electrode layer are provided on the substrate oxide layer from left to right, wherein the p-type electrode layer II is embedded in the electron traveling layer region with a low impurity concentration, and each layer arranged in sequence on the substrate oxide layer is surrounded by an electric field isolation ring layer, and an intrinsic layer is provided in the outer region of the electric field isolation ring layer, and a p-electrode I is provided on the p-type electrode layer I, a p-electrode II is provided on the p-type electrode layer II, and an n-electrode is provided on the n-type electrode layer. The advantages of the patent are that the structure of the invention avoids the curvature effect, eliminates edge breakdown, improves stability, and realizes multi-stage cascade avalanche multiplication monolithic integration at the same time, obtains a very high stable gain, and effectively suppresses the noise caused by hole avalanches.

The invention relates to a special glass material, in particular to high-airtightness low-haze environment-friendly cover plate glass as well as a preparation method and application thereof. The high-temperature-resistant glass is prepared from the following components in parts by weight: 53.0 to 62.0 parts of SiO2, 9.0 to 15.0 parts of Al2O3, 0.1 to 2.0 parts of CaO, 4.0 to 8.0 parts of MgO, 3.0 to 7.0 parts of K2O, 9.0 to 15.0 parts of Na2O, 0 to 2.0 parts of Li2O, 0.5 to 2.0 parts of ZrO2, 2.0 to 6.0 parts of B2O3, 0 to 3.0 parts of Bi2O3, 0 to 2.0 parts of Ag2O, 0 to 3.0 parts of In2O3 and 0.1 to 1.0 part of CeO2. The cover plate glass provided by the invention not only has good performances in the aspects of air tightness, transmittance, haze, strength, chemical stability and environmental protection property, but also can be reduced to generate a black light absorption layer, and has good processability.

The invention provides a solar seawater desalination photothermal conversion efficiency optimization method and system based on machine learning, and the method comprises the steps: firstly collecting the solar spectrum distribution data, seawater turbidity spectrum data, real-time heat flow data and semiconductor nanomaterial data of a target sea area; and constructing a material spectrum mapping library based on the light absorption characteristics of the nano material. Through coupling analysis of a solar spectrum and a seawater turbidity spectrum, an environmental constraint condition is formed, a Bayesian optimization model is combined with a material spectrum mapping library and real-time heat flow data, and an optimal nano material mixing ratio is generated under environmental constraint. Then, the interface evaporation rate is predicted through the deep residual network, an optimal material morphology configuration scheme is obtained, and finally the morphology configuration is applied to semiconductor nanomaterial preparation. The photo-thermal conversion efficiency of the solar desalination system in the high-turbidity seawater environment is improved.

The invention relates to the technical field of photovoltaic power generation, and discloses a photovoltaic power generation panel supporting device convenient for angle adjustment, which comprises a base, the top of the base is fixedly connected with a platform, the top of the base is fixedly connected with a motor, the output end of the motor is fixedly connected with a cross plate, and the top of the cross plate is fixedly connected with a motor. The inner wall of the cross-shaped plate is rotatably connected with a connecting plate, the inner wall of the connecting plate is fixedly connected with a groove plate, and the inner wall of the cross-shaped plate is provided with a supporting mechanism used for supporting the groove plate. According to the invention, the photovoltaic panel rotates, the power generation efficiency can be improved, the position of solar energy can be tracked, the photovoltaic panel can be always kept vertical to solar rays, and the light absorption efficiency is improved; the surface of the photovoltaic panel can receive sunlight more uniformly by rotating the photovoltaic panel, the angle adjusting state of the photovoltaic panel can be further improved, the use efficiency of the device is improved, and the sunlight conversion power generation amount of the photovoltaic panel can be increased.

Sensor for sensing temperature and measuring the state of charge (SOC) of a fiber-optic accumulator comprising one or more thermoluminescent materials, at one or more emission peaks in a region of variation of the optical absorption spectrum of the insertion material of an electrode. A sensor for sensing temperature and measuring the state of charge (SOC) of a metal-ion accumulator, including an optical fiber one free end of which forms an optical probe including one or more thermoluminescent materials capable of emitting a light peak at at least two wavelengths, at least one of the two peaks being designed to be in at least one region of variation of the optical absorption spectrum of the metal ion insertion material of at least one electrode of the accumulator, the ratio of the two peaks depending on the temperature of the accumulator and the variation in intensity of at least one of the two peaks being dependent on the insertion of the metal ions into the electrode.

Disclosed in the present application are a 3D printing photo-curable resin and a preparation therefor. The preparation method comprises: under the constant-temperature and constant-humidity conditions of a preset temperature and a preset humidity, weighing 50-80 parts of an acrylate oligomer, 10-40 parts of a reactive diluent, 0.05-0.1 parts of an ultraviolet light absorber, and 0.01-0.05 parts of p-hydroxyanisole, adding the weighed substances into a container, and stirring the materials in the container at a first preset rotation speed; and after stirring for a first preset time, adding the weighed 5-10 parts of a cross-linking agent and 1-3 parts of a photoinitiator into the container while stirring, and stirring same for a second preset time at a second preset rotation speed under dark conditions, so as to obtain the 3D printing photo-curable resin. In this way, the resin has an extremely high strength and toughness, without a filler being added, and can avoid the problems of unstable material performance and poor printing precision.

The invention discloses a nano-pillar array NaKSb photoelectric cathode for enhancing light absorption, which is characterized in that through the design of a double-layer TiOtwo-dimensional nano grating and a nano-pillar array structured NaKSb photoelectric cathode layer, the optical path of light with the wave band of 450-900 nm in the photoelectric cathode is increased under the condition that the thickness of the NaKSb photoelectric cathode is not increased, the reflectivity of the wave band of 400-600 nm is reduced, and the light absorption of the NaKSb photoelectric cathode is enhanced. The absorption rate at 400-1000 nm is improved by 32.28% compared with that of a traditional planar film type photoelectric cathode, the absorption rate at 800-1000 nm near-infrared band is improved by 40.27% compared with that of the traditional planar film type photoelectric cathode, the problem that the absorption of the traditional planar film type photoelectric cathode near-infrared band is insufficient is solved, and the photoelectric cathode is suitable for high-performance low-light night vision imaging devices.