474results about How to "Improve trapping effect" patented technology

The invention relates to a method for preparing a pyramid array on a monocrystalline silicon substrate, and belongs to the technical field of manufacture of photovoltaic and semiconductor devices. The method comprises the following steps of: covering microballons in periodic arrangement on the surface of a monocrystalline silicon piece, and annealing near the glass transition temperature point of the microballoon; in oxygen atmosphere, obtaining a microballoon array in separation arrangement after etching by use of inductive coupling plasma; depositing a metallic titanium membrane on the monocrystalline silicon piece uniformly by a physical vapor deposition manner; and putting a silicon wafer with a masking film into an alkaline solution containing a surfactant for corrosion so as to obtain the pyramid array in order arrangement. The method is simple in process, short in preparation period and mature in technology; and three structures such as a positive pyramid array, an inverted pyramid array and a positive and inverted pyramid combined array can be obtained by a method for preparing a template through selecting and fine turning. The method has wide application value in the fields of photovoltaic, magnetic memory devices, nano photoelectric devices, nano sensors, surface raman enhancement and surface plasma effect and the like.

The invention discloses a light trapping structure for a thin film silicon/crystalline silicon heterojunction solar battery, which comprises a crystalline silicon substrate (2), a doped thin film silicon layer (3) on the crystalline silicon substrate (2), a transparent conductive electrode (4) on the doped thin film silicon layer (3), and a metal nano-structure (1) between the doped thin film silicon layer (3) and the transparent conductive electrode (4), a metal nano-structure (1) above the transparent conductive electrode (4), or a metal nano-structure (1) inside the transparent conductive electrode (4). The connecting surface of the crystalline silicon substrate (2) and the crystalline silicon substrate (2) is not specially woven with velvet. The light trapping structure acquires a light trapping effect by using a surface plasmon effect of the metal nano-structure.

The invention provides a polycrystalline black silicon texturization treatment fluid. The polycrystalline black silicon texturization treatment fluid comprises a hydrofluoric acid solution, a hydrogen peroxide solution and a metal salt, wherein a volume ratio of the hydrofluoric acid solution to the hydrogen peroxide solution is 1-25:5-40, the mass fraction of hydrofluoric acid in the hydrofluoric acid solution is 40-50%, the mass fraction of hydrogen peroxide in the hydrogen peroxide solution is 20-55%, the metal salt is at least one of copper nitrate, silver nitrate, palladium nitrate, copper chloride, auric chloride acid, chloroplatinic acid, potassium chromate and nickel sulfate, and the mole concentration of the metal salt is 1-10<5>[mu]mol/L. The invention also provides a polysilicon chip texturization method applying the polycrystalline black silicon texturization treatment fluid, and a polycrystalline black silicon texturization product.

The invention relates to a monochamus alternatus imago attractant which belongs to the technical field of pest control. The monochamus alternatus imago attractant contains the following components according to volume percent: 60-80 percent of turpentine oil, 16-24 percent of ethanol, 2-10 percent of phenethyl alcohol and 2-6 percent of terpilenol. The monochamus alternatus imago attractant contains the following ingredients according to volume percent: 24.64-32.86 percent of Alpha-pinene, 22.91-30.55 percent of Beta-pinene, 6.51-8.68 percent of 3-carene, 2.97-3.96 percent of Beta-phellandrene, 0.74-0.99 percent of terpinolene, 0.62-0.83 percent of laurene, 1.60-2.13 percent of others, 16-24 percent of ethanol, 2-10 percent of phenethyl alcohol and 2-6 percent of terpilenol. The monochamus alternatus imago attractant has remarkable attracting effect to both monochamus alternatus female worms and male worms, and stronger attracting effect to the male worms; and also has certain attracting effect to other coleopteran forestry pests. The invention has the advantages of high efficiency, environmental protection, simple and convenient preparation, low cost and good durability, can be used for prediction and control in monochamus alternatus forest with the control effect up to 53.59-67.30 percent and can effectively control the population density in the monochamus alternatus forest and restrains the spread and the extension of pine wood nematode disease.

The invention discloses a method for repairing a bolt hole of a cylinder cover, which is used for repairing the bolt hole when the bolt hole leaks. The method comprises the following steps of: expanding the bolt hole, to be repaired, of the cylinder cover, namely expanding the diameter of the bolt hole for 2.5 mm; precisely reaming the expanded bolt hole, wherein the diameter of the precisely reamed bolt hole is expanded for 3 mm on the basis of an original size; coating a repair adhesive on the inner wall of the precisely reamed bolt hole; cooling a prepared insert bush which is adapted to the precisely reamed bolt hole in liquid nitrogen; and pressing the cooled insert bush into the bolt hole in which the adhesive is coated, so that the insert bush expands at normal temperature to form interference fit with the bolt hole. In the repair method, only leaky bolt holes need to be repaired, so that the cylinder cover of which the bolt hole has leakage defects can be saved so as not to be scrapped totally, and the cost is low.

The invention belongs to the texturing field of a crystalline silicon solar cell, and specifically relates to a texturing method for polysilicon wafer cutting by a diamond wire. The texturing method comprises the following steps of 1, preparing a corrosion liquid, putting a silicon wafer into the corrosion liquid to be reacted at a temperature of 20-80 DEG C for 4-15min to form a porous structureon the surface of the silicon wafer; 2, performing water washing on the silicon wafer processed in the first step, and then cleaning the silicon wafer by a demetalization cleaning liquid at a normal temperature to remove solid metal granules from the silicon wafer, wherein the cleaning time is 2-8min; and 3, performing water washing on the silicon wafer processed in the second step for 30-100S; and performing correction on the porous structure on the surface of the silicon wafer by adopting a texturing correction liquid. By cutting the polysilicon surface by the diamond wire, the texturing structure with uniform dimensions, hole diameter of 400nm-1.5mm, hole depth of 200-500nm and low reflectivity can be obtained, thereby improving photoelectric conversion efficiency effectively.

The invention discloses an inverted pyramid structure of a polysilicon surface and a fabrication method of the inverted pyramid structure. The method comprises the following steps: preparing black silicon by different methods; rinsing a sample in a mixed liquid of hydrogen peroxide and ethanol amine; and carrying out retreatment on the washed black silicon in a mixed liquid of hydrogen peroxide, hydrofluoric acid, metaphosphoric acid and ammonium fluoride, so as to form the inverted pyramid structure of the polysilicon surface. A wet-chemical method which is different from acid and alkaline corrosion is adopted. According to the method, the effects of anisotropy can be reduced to the maximal extent; and the black silicon with different nano-structures can be corroded into a nano textured structure with a regular inverted pyramid structure through oxidation. Compared with the traditional polycrystalline silicon texture, the polysilicon inverted pyramid light-trapping structure disclosed by the invention is relatively high in light utilization rate and relatively low in reflectivity, so that the polysilicon inverted pyramid light-trapping structure has the characteristics of the inverted pyramid structure; compared with the traditional high surface recombination of a small and dense structure of the black silicon, the surface recombination is obviously reduced; and the efficiency of a solar cell is higher.

The invention relates to a monochamus alternatus imago attractant and a trap thereof, which belong to the technical field of pest control. The volume percents of the components of the attractant are 60 to 80 percent of oil of turpentine, 16 to 24 percent of alcohol, 2 to 10 percent of phenethyl alcohol and 2 to 6 percent of terpineol. The volume percents of each component of the attractant are 24.64 to 32.86 percent of alpha-pinene, 22.91 to 30.55 percent of beta-pinene, 6.51 to 8.68 percent of 3-carene, 2.97 to 3.96 percent of beta-phellandrene, 0.74 to 0.99 percent of terpinolene, 0.62 to 0.83 percent of laurene, others for 1.60 to 2.13 percent, 16 to 24 percent of alcohol, 2 to 10 percent of phenethyl alcohol and 2 to 6 percent of terpineol. The trap consists of a cylindrical body (3), a funnel-shaped imago picking device (6) arranged at the lower part of the body (3), and an imago collecting bottle (7) connected with the lower end of the funnel-shaped imago picking device (6). The attractant has the advantages of convenient preparation, simple usage and long lasting period, and is a nuisanceless plant protection product; and the trap has the advantages of simple structure, low cost, long service life and good attracting effect, and can be wildly applied to the monochamus alternatus imago control in the field.

The invention discloses a method for realizing high-trapping-light nanostructure single-face texture surface making. The method comprises the steps: cleaning a silicon wafer; conducting re-spreading to the surface of the silicon wafer; removing residues on the surface of the silicon wafer which is re-spread; coating TiO2 of a nanostructure on the surface of the silicon wafer or depositing Ti on the surface of the silicon wafer, and rapidly annealing; conducting wet etching on the silicon wafer to form the nanostructure; and removing oxide and titanium ions which are not completely reacted on the surface of the silicon wafer. Compared with the prior art, the method is adopted to prepare the high-trapping-light nanostructure, only technology sequence is changed, and under the premise that key equipment is not increased, only one light source needs to be added or only sun light needs to be led in so that the purpose of single-face texture surface making can be achieved. The nanostructure has a good light trapping effect. Besides, the method is simple in process step, and suitable for mass production.

The invention discloses a broad spectrum pest trapping and sticking device comprising a broad spectrum pest trapping and sticking device body. The broad spectrum pest trapping and sticking device body comprises a transparent main body, a shaft hole is formed in the transparent main body, a support is in rotary fit with the transparent main body through a bearing, a plurality of pest trapping color boards of different colors wrap the transparent main body and are provided with a plurality of colorless transparent light transmission windows, the support where the transparent main body is located is provided with an LED lamp belt electrically connected with a power source, the LED lamp belt can provide light rays of different wave bands according to the phototaxis characteristic of pests, and transparent pest sticking boards wrap the pest trapping color boards. The broad spectrum pest trapping and sticking device can give out or reflect light rays of different colors and wave lengths in the daytime or at night to trap the pests, the pests of the multiple varieties are trapped, and the effect is good; the flickering effect by 360 degrees can be produced, the effect that leaves or flowers are blown by wind or pests move can be simulated, and the pest trapping effect is enhanced; the broad spectrum pest trapping and sticking device can be used either at home or outdoors, and is convenient to place, high in wind resistance, easy to maintain, long in service life and low in use cost.

The invention relates to a sex attractant for fruit tree pest Grapholitha molesta Busck and belongs to the technical field of control on the fruit tree pest Grapholitha molesta Busck. Effective ingredients of sex pheromones of the Grapholitha molesta Busck comprise (Z8)-dodecen-1-acetate, (E8)-dodecen-1-acetate, (Z8)-dodecen-1-ol, (E8, E10)-dodecadien-1-ol, dodeca-1-ol and tetradeca-1-ol, the ingredients of the sex pheromones are mixed with a sustained release solution to form a sex pheromone solution, the sex pheromone solution is added to a release carrier, and a lure and an isotropic tube can be obtained. When the sex attractant is applied to peach orchards and pear orchards, the lure has very strong trapping effect on the Grapholitha molesta Busck, the isotropic tube can significantly interfere with mating activities of female Grapholitha molesta Busck and male Grapholitha molesta Busck, the sex attractant is used for controlling the fruit tree pest Grapholitha molesta Busck and shows the excellent control effect, and the pest-damaged fruit rate of the orchards is greatly reduced.

The invention relates to a preparation method of a sexual attraction slow-release formulation for fruit flies. By weight parts, the preparation method comprises the following steps: (1) dissolving 1-50 parts of methyl eugenol or cue-lure and 0.1-20 parts of toxic ingredients in 100 parts of organic solvent, for standby application, wherein the toxic ingredients include trichlorphon, abamectin, and emamectin benzoate or chlopyrifos; (2) stirring 1000 parts of polyatomic alcohol with molecular weight smaller than 3000 for 15-100 minutes at the temperature of 35-75 DEG C and vacuum degree of minus 0.1MPa; and (3) adding the standby solution of the step (1) in the polyatomic alcohol of the step (2), continuing stirring to be uniform, then adding 3000-10000 parts of isocyanate, continuing stirring for 120 minutes at the temperature of 35-75 DEG C and vacuum degree of minus 0.1MPa, stopping vacuum-pumping, and then obtaining pasty sexual attraction slow-release formulation for the fruit flies. The sexual attraction slow-release formulation prepared by the method is mainly used for monitoring fruit fly population density or preventing and controlling fruit fly pests in large area.

The invention discloses a natural-enemy-friendly pest-luring light source special for a tea garden and a spectrum screening and manufacturing method thereof, and belongs to the technical field of a nuisanceless control technology of primary pests in the tea garden. The method comprises the steps of obtaining a spectrum range of the pest-luring light source through indoor experiments and field experiments; gathering three LED lamp beads within the spectrum range, and obtaining the optimal quantity ratio of the three LED lamp beads in the pest-luring light source and the lamp type of the pest-luring light source through the field experiments; fixing the three LED lamp beads to an LED substrate of a maize-type structure and integrating needed original parts to obtain the natural-enemy-friendly pest-luring light source according to the specifications. The luminescence spectrum of the pest-luring light source has pertinence, the pest-luring light source mainly lures the primary pests in thetea garden, the luring quantity of natural enemy insects and non-target pests is reduced, and as the pest-luring light source, the pest-luring light source can prevent the pests in the tea garden andeffectively protect the ecological balance at the same time.

The invention discloses an efficient trap method for flyblows of flies and relates to a cultivation method. The method comprises the following steps of: selecting an ovum luring matter comprising a matrix, a foodstuff and an ovum luring reinforcing agent; adding water to the matrix, piling to a small cluster until no water flows, piling the matrix to the small cluster in an ovum luring disc, wherein a piling area is 25-35% of an ovum receiving disc, and scattering the foodstuff and the ovum luring reinforcing agent on the ovum receiving disc; during a spawning period of the flies, putting the ovum receiving disc into a fly cultivation growing room from 8 am to 10 am every day, and taking out the ovum receiving disc from 3:30 pm to 5:30 pm on the same day, wherein a large amount of fly blows, in particular red head flies, are arranged on the taken ovum receiving disc, the ovum can be spawned in the ovum receiving disc in a cluster, and each cluster is about more than 20 g when the ovum cluster is larger; taking the fly blows on the ovum receiving disc, removing the ovum luring matter attached on the ovum receiving disc to obtain the clear fly blows, collecting the fly blows in a container, measuring and recording quality.

The invention relates to the technical field of orange insect disease prevention and treatment and discloses a composition for trapping diaphorina citri and a trapping method using the same. The composition comprises gamma-terpinene, linalool, beta-caryophyllene and alpha-copaene. The trapping method comprises the following steps of putting the composition into a transparent plastic insect-trapping bottle, covering the bottom with a bottle cover, spraying an insect binder to the outer part of the insect-trapping bottle to obtain an insect binding bottle, hanging the insect binding bottle on a diaphorina citri host plant, and carrying out diaphorina citri trapping and binding. The composition can improve a trapping amount by 62 times in the case of high diaphorina citri density, has substantial trapping effects, can be used for preventing, treating and forecasting diaphorina citri, and can also be used for preventing citrus Huanglongbing propagated by diaphorina citri.

The present invention relates to a device capable of utilizing photocatalysis technique to purify air and trap mosquito. Said includes the following several portions: first portion has a photocatalysis reactor, it can decompose the organics of voc, formaldehyde and benzene contained in the air into carbon dioxide, water and micro reaction intermediate product, at the same time, under the action of photocatalysis and wind force decompose resin to release micro gas capable of trappig mosquito; second portion has a negative pressure well production structure with photocatalysis self-cleaning function, the negative pressure produced by said negative pressure well production structure can suck mosquito into said reactor; and third portion, under the action of photocatalyst it makes harmless treatment.