41results about How to "Avoid Luminescence Quenching" patented technology

The invention provides bio-based carbon nano dot fluorescent powder, a preparation method and applications thereof, belongs to the scientific field of nano materials, and aims to solve the problems that in the prior art the luminescent quantum efficient of conventional carbon nano dot based luminescent materials is low and the luminescent materials are difficult to process. The bio-based carbon nano dot fluorescent powder takes the carbon nano dots as the central luminescent materials; biological products such as starch, agar powder, and the like are taken as the dispersing medium; the carbon nano dots are evenly bonded to the selected particle surfaces of the biological product powder through hydrogen bonds, thus the carbon nano dots are highly dispersed in space, the solid-state luminescence quenching caused by conglomeration is effectively avoided, and the high efficient luminescence of carbon nano dots in a solid-state system is achieved. The invention further provides a preparation method of the bio-based carbon nano dot fluorescent powder, and the provided fluorescent powder can be applied to the industries such as temperature sensor, illumination and display, fluorescent paint, and the like.

The invention discloses an up-conversion fluorescence immune chromatography test paper for the quantitative detection of neomycin and a preparation method thereof. The up-conversion fluorescence test paper comprises a support layer, an adsorption layer and a protection layer; the absorbing layer comprises an adsorption fiber layer, a fluorescent antibody fiber layer, a cellulose membrane layer and a water adsorption material layer at a handle hand; the cellulose membrane layer is provided with detection blotting printed by a carrier protein solution coupled with NEO and contrast blotting printed by a goat anti-mouse IgG; the fluorescent antibody adopts an NEO monoclonal antibody or polyclonal antibody marked by NaYF4:Yb:Er nanoparticles. Through the up-conversion fluorescence immune chromatography test paper for the quantitative detection of the neomycin, the application of the immune chromatography marked by up-conversion fluorescence nanometer materials in the quantitative detection of NEO residual is realized, so that the detection of the NEO residual is not subjected to background interference; the up-conversion fluorescence immune chromatography test paper for the quantitative detection of the neomycin is strong in specificity, high in sensitivity, simple, intuitional and accurate in detection, low in cost, wide in range of application and easy to popularize and apply.

The invention discloses an immune chromatography test paper strip for the quantitative determination of clenbuterol based on up-conversion fluorescent nanoparticle label and a preparation method thereof. The test paper strip comprises a supporting layer, an adsorption layer, and a protection layer, wherein the adsorption layer comprises an adsorption fibrous layer, a fluorescent antibody fibrous layer, a cellulose film and an absorbent material layer at the handle end, the cellulose film is provided with detection blots printed by using a CL coupling carrier protein solution and control blots printed by using goat anti-mouse IgG antibodies, and the fluorescent antibody is an NaYF4:Yb:Er nanoparticle labelled CL monoclonal antibody or polyclonal antibody. According to the invention, the application of immune chromatography based on the up-conversion fluorescent nanoparticle label in the quantitative determination of CL residues is realized, so that the detection of the CL residues has no background interference; and the test paper strip has the advantages of strong specificity, high sensitivity, simple, and accurate detection, low cost, wide application scope, and easiness in popularization and application.

The invention provides an organic light-emitting diode which comprises an anode, a hole transport layer, a light-emitting functional layer, an electron transport layer, an electron injection layer and a cathode which are sequentially arranged, wherein the hole transport layer and the electron transport layer are distributed on bipolar materials on the same group through adopting an electron orbit and a hole orbit, and both the hole and electron mobilities of the bipolar materials which are adopted by the hole transport layer and the electron transport layer are between 1*10<-4> and 1*10<-2>cm <2>V<-1> s<-1>. The electron orbit and the hole orbit which are adopted by the diode are distributed on the materials on the same group, the electron transport performance and hole transport mobility which respectively correspond to the hole and the electron transport materials are also similar, so the effective charge compound balance performances are enabled to be similar, and accordingly, the charge compound balance is ensured.

The invention provides a novel GaN-based LED structure and a manufacturing method of the novel GaN-based LED structure, and belongs to the field of semiconductor photoelectronic device manufacturing. Compared with the prior art, the novel GaN-based LED structure and the manufacturing method of the novel GaN-based LED structure are characterized in that a p- type GaN epitaxial layer doped with Mg grows on a p+ -GaN layer and an n+ -GaN layer at a high temperature; Si atoms in the n+ -GaN layer can effectively restrain forming of point defects and the luminescence quenching phenomenon of the GaN epitaxial layer, and the p+ -GaN layer is beneficial for improving hole current injection efficiency and reducing the working voltage of an LED; because the GaN-based LED grows on the p+ -GaN layer and the n+ -GaN layer at the high temperature, the crystalline quality, the hole concentration and the mobility ratio of the p- type GaN are improved, and accordingly the efficiency of injecting hole current into a quantum well active area and the luminous efficiency of the LED are improved.

The invention belongs to the field of display technologies, and particularly relates to a quantum dot light emitting diode and a preparation method thereof. The quantum dot light emitting diode includes an anode, a cathode, and a quantum dot light emitting layer arranged between the anode and the cathode. A composite electron transport layer is arranged between the cathode and the quantum dot light emitting layer. The composite electron transport layer contains an electron transport material and an ultraviolet absorbing material. The composite electron transport layer of the quantum dot lightemitting diode contains the electron transport material and the ultraviolet absorbing material. The functional groups in the ultraviolet absorbing material are combined with vacancies or dangling bonds on the surface of the electron transport material to passivate the surface defects of the electron transport material, thereby avoiding the phenomenon of fluorescence quenching of the quantum dot light emitting diode and further improving the light emitting performance of the device.

The invention discloses a light-emitting layer material for a carbon-dot-based electroluminescent device. The light-emitting layer material is prepared by the following steps: taking oil-soluble carbon dots as a guest material and polyvinyl carbazole as a main material, and respectively dissolving the oil-soluble carbon dots and the polyvinyl carbazole in a solvent chlorobenzene, and mixing the guest material with the main material according to a mass ratio of 1:(2.5-3.5) to obtain a doped light-emitting layer. The light-emitting layer material provided by the invention can be used to preparea high-brightness carbon-point electroluminescent device, and can effectively inhibit the luminescence quenching of the device. According to the invention, through the adjustment of the device structure, yellow-light, white-light and blue-light carbon-dot electroluminescent diodes are respectively prepared.

The present invention relates to a benzimidazole n-type dopant. The benzimidazole n-type dopant includes organic ion salts containing a benzimidazole halide anion with a structure shown in a formula (1), a neutral n-type dopant material with a structure shown in a formula (2), or a dimeric n-type dopant material with a structure shown in a formula (3). When the benzimidazole n-type dopant is used as the dopant of electron transporting materials, the dopant can enhance electron injection, increase thin film electron mobility rate, carrier concentration and device current density, and improve device efficiency and stability.

An inverted blue light quantum-dot thin film electroluminescence device disclosed by the present invention comprises a substrate, a cathode, an electronic transmission layer, a blue light quantum-dot luminescent layer, a hole balance layer, hole transport layers and an anode which are laminated orderly, and the hole transport layers comprise a third hole transport layer, a second hole transport layer and a first hole transport layer which are laminated orderly. The thickness of the hole balance layer is between 5 nm and 10 nm, and the HOMO energy levels of the third hole transport layer, the second hole transport layer and the first hole transport layer are reduced orderly, thereby forming the ladder-like potential barrier between the blue light quantum-dot luminescent layer and the anode, improving the hole-injection ability of the hole transport layers gradually, and satisfying the hole injection requirement of the blue light quantum-dot thin film electroluminescence device. Further, the hole balance layer can block the direct contact of a first hole transport material of a high-migration rate and the blue light quantum-dot luminescent layer, thereby avoiding the luminescence quenching.

The invention discloses an ionic type cyclometalated iridium complex liquid crystal luminescent material and an application thereof. The cyclometalated iridium complex liquid crystal luminescent material adopts phenylpyridine as an anionic ligand and a bipyridyl derivative as an N N ligand; the cyclometalated iridium complex liquid crystal luminescent material adopts a non-planar structure built with a cyclometalated iridium complex as a luminescent core and a biphenyl derivative as a liquid crystal unit. The cyclometalated iridium complex is taken as the luminescent layer, and the non-doped polarizing red electroluminescent device with the single luminescent layer and the polarization ratio being 4 is obtained with a rubbing alignment method.

The invention discloses an inverted green light quantum dot film electroluminescence device. The device comprises a substrate, a cathode, an electron transmission layer, a green light quantum dot luminescence layer, a hole balance transmission layer, a hole transmission layer and an anode which are sequentially laminated, wherein the hole transmission layer comprises a third hole transmission layer, a second hole transmission layer and a first hole transmission layer which are sequentially laminated, and thickness of the hole balance transmission layer is 5-10nm. According to the device, HOMO energy levels of the third transmission layer, the second transmission layer and the first transmission layer decrease sequentially, so step type barrier is formed between the green light quantum dot luminescence layer and the anode, hole injection capability of the hole transmission layer is gradually improved, hole injection requirements of the green light quantum dot film electroluminescence device can be satisfied, moreover, the hole balance layer can prevent direction contact between the first hole transmission material with high mobility and the green light quantum dot luminescence layer to prevent luminescence quenching.

The invention discloses a fluorescence emission material and an organic light-emitting device prepared from the fluorescence emission material. A thiophene / furan [2, 3-b] quinoxaline and tricyclic aromatic hydrocarbon fused high-efficiency blue fluorescence and other color light-emitting materials are constructed through molecular design. The luminescent wavelength of the material can be regulatedto 426nm and 457nm, and the absolute fluorescence quantum yield reaches 65% and 82% respectively. The material can provide beneficial supplement for commercial blue light materials.

The invention discloses an inverted green light quantum dot film electroluminescence device. The device comprises a substrate, a cathode, an electron transmission layer, a green light quantum dot luminescence layer, a hole balance layer, a hole transmission layer and an anode which are sequentially laminated, wherein the hole transmission layer comprises a second hole transmission layer and a first hole transmission layer which are laminated, and thickness of the hole balance layer is 5-10nm. According to the device, the HOMO energy level of the second transmission layer is greater than the HOMO energy level of the first transmission layer, so step type barrier is formed between the green light quantum dot luminescence layer and the anode, hole injection capability of the hole transmission layer is gradually improved, hole injection requirements of the green light quantum dot film electroluminescence device can be satisfied, moreover, the hole balance layer can prevent direction contact between the first hole transmission material with high mobility and the green light quantum dot luminescence layer to prevent luminescence quenching.

The invention relates to the technical field of OLEDs and provides a compound with TADF properties, a display panel comprising the compound and a display device comprising the compound. The compound has a structure shown as formula (1), wherein A1 and A2 are used for representing hydrogen atoms, phosphorus-containing oxygen substituent groups, sulfone substituent groups, aryl boron substituent groups and other electron acceptor groups; L1 and L2 are each independently selected from single bond, phenylene group, thienyl group, naphthylene group, anthranylene group, phenanthrylene group, and pyrenylene group; Ar1 and Ar2 are independently selected from hydrogen atoms, phenyl groups, thienyl groups, naphthyl groups, anthryl groups, phenanthrene groups, pyrenyl groups, phosphorus-containing oxygen group substituent groups, sulfone substituent groups, aryl boron substituent groups and other groups. A fused carbazole structure of the compound has very strong electron donating ability and thermal stability. When the fused carbazole structure is used as an electron donor to be combined with an appropriate acceptor material to form a bipolar main body material to be applied to light-emitting layers, good energy transfer can be realized between the bipolar main body material and a dopant, so that the light-emitting efficiency of devices is improved.

The invention provides an OLED light-emitting device and a preparation method thereof, and belongs to the technical field of display. The OLED light-emitting device comprises a substrate, and an anode, a hole injection layer, a hole transport layer, a light-emitting layer, an electron transport layer, an electron injection layer and a cathode which are stacked on the substrate; a first ion adsorbent is doped between the anode and the light-emitting layer and is used for adsorbing metal ions dissociating between the anode and the light-emitting layer; a second ion adsorbent is doped between thecathode and the light-emitting layer and is used for adsorbing metal ions dissociating between the cathode and the light-emitting layer. According to the OLED light-emitting device and the preparation method thereof, the metal ions can be prevented from entering the light-emitting layer, and the light-emitting quenching phenomenon can be avoided so that the service life of the OLED light-emittingdevice is prolonged.

The invention provides a method for preparing a transparent fluorescent ultra-thin film composite material by using a layered vermiculite material and an organic fluorescent molecular material. It is prepared by a supramolecular assembly method, so that the prepared organic-inorganic fluorescent ultra-thin film composite material overcomes the simple organic fluorescent ultra-thin film composite material. materials and pure inorganic materials, and have the advantages of both, and realize the assembly of anion and anion body at the same time, the prepared fluorescent composite material has a longer fluorescence lifetime, has the characteristics of transparency and solidification, and has great High promotion and application value.

The invention relates to a carbazole bridged dinuclear metal platinum complex and its preparation method and application, relates to the field of aggregation luminescent materials, and is used to solve the problem of aggregation and quenching of efficient red and deep red luminescent metal platinum complexes. The carbazole bridged The binuclear metal platinum complex is shown in formula I: wherein, R is C 4 h 9 or C 12 h 25 ; 1 and R 2 At least one of them is 2-isonitrile-1,3-xylene, and the other is Cl or 2-isonitrile-1,3-xylene; n is 1 or 2. The carbazole-bridged binuclear metal platinum complex provided by the invention has good performance of emitting phosphorescence, and can be applied to the fields of light-emitting and display devices.

The invention discloses a COVID-19 antigen detection card, its preparation method and application, and belongs to the field of nanomaterials and nanomedicine, wherein the rare earth nanoprobe used is sodium yttrium fluoride coated with sodium erbium fluoride with a core-shell structure , the particle size is 20nm~30nm, and its composition is: NaErF 4 @NaYF 4 , where NaErF 4 It is an all-erbium-doped core structure; NaYF4 is a shell layer, and @ means that NaYF4 is coated on NaErF 4 surface. The nanoprobe of the present invention is a rare earth fluoride nanomaterial, which has the advantages of low background, long luminescent life, strong fluorescent signal, and high signal-to-noise ratio. The labeling is connected to the new crown monoclonal antibody through a covalent bond, and the labeling product is stable and has With the characteristics of high sensitivity, high accuracy, fast and easy detection, etc., it can screen and detect throat swabs, nasal swabs, nasopharyngeal swabs and saliva samples of patients suspected of having a new crown in the early stage, and can quickly and specifically help clinical diagnosis.

The invention discloses high-density terbium / cerium doped scintillation glass. The scintillation glass is prepared from the following components in percentage by weight: 45-60% of SiO2, 15-25%of BaO, 5-15%of Bi2O3, 1-5%of Al2O3, 1-5%of La2O3, 0.5-1.5%of Sb2O3 and 5-15%of Tb2O3, wherein the Bi2O3 is Bi2O3 doped with Ce<3+>. The scintillation glass has the advantages of being good in chemical stability, high in scintillation light luminous efficiency and capable of being used for preparing scintillation optical fiber panels.

The invention discloses an inverted green light quantum dot thin film electroluminescent device, which comprises a substrate, a cathode, an electron transport layer, a green light quantum dot luminescent layer, a hole balance layer, a hole transport layer and an anode stacked in sequence. The hole transport layer includes a third hole transport layer, a second hole transport layer and a first hole transport layer stacked in sequence. The thickness of the hole balancing layer is 5nm˜10nm. The HOMO energy levels of the third hole transport layer, the second hole transport layer, and the first hole transport layer decrease sequentially, thereby forming a step barrier between the green light quantum dot light-emitting layer and the anode to gradually increase the hole density. The hole injection capability of the transport layer meets the hole injection requirements of the green light quantum dot thin film electroluminescence device. Further, the hole balancing layer can prevent the high-mobility first hole-transporting material from directly contacting the green light quantum dot light-emitting layer, so as to avoid luminescence quenching.

The invention relates to an organic electroluminescent device, which comprises a first electrode layer, a light-emitting layer, an electron injection layer and a second electrode layer stacked together, and the electron injection layer and the second electrode layer are arranged in physical contact. The electron injection layer comprises an organic ion salt of benzimidazole represented by formula (I), a benzimidazole neutral organic material represented by formula (II), and a dimerization of benzimidazole organic material represented by formula (III). One or more in the body, this type of material reduces the potential barrier between the second electrode layer and the interface of the organic electron transport layer, improves the transport capacity of carriers, so that the electron injection layer and the The second electrode layer is arranged in direct physical contact, and an insulating buffer layer is no longer required, which has the properties of improving device efficiency and prolonging device life.

The invention provides bio-based carbon nano dot fluorescent powder, a preparation method and applications thereof, belongs to the scientific field of nano materials, and aims to solve the problems that in the prior art the luminescent quantum efficient of conventional carbon nano dot based luminescent materials is low and the luminescent materials are difficult to process. The bio-based carbon nano dot fluorescent powder takes the carbon nano dots as the central luminescent materials; biological products such as starch, agar powder, and the like are taken as the dispersing medium; the carbon nano dots are evenly bonded to the selected particle surfaces of the biological product powder through hydrogen bonds, thus the carbon nano dots are highly dispersed in space, the solid-state luminescence quenching caused by conglomeration is effectively avoided, and the high efficient luminescence of carbon nano dots in a solid-state system is achieved. The invention further provides a preparation method of the bio-based carbon nano dot fluorescent powder, and the provided fluorescent powder can be applied to the industries such as temperature sensor, illumination and display, fluorescent paint, and the like.

The invention discloses a D-A type aromatic ring conjugated dendritic ring metal iridium complex and a preparation method and application thereof; a dendritic unit is helpful for improving the efficiency of an electroluminescent material device, but a report that the dendritic unit and a D-A unit exist in a ring metal iridium complex near-infrared luminescent material at the same time does not exist at present. The D-A type aromatic ring conjugated dendritic ring metal iridium complex takes N,N-diphenylamine or 3,6-di-tert-butyl carbazole with good hole transport performance as a dendritic unit, takes triphenylamine-benzotriazole-isoquinoline / quinoline with a D-A structure as a main ligand, and takes 2-picolinic acid as an auxiliary ligand. The D-A type aromatic ring conjugated dendritic ring metal iridium complex is used as a luminescent layer dopant to prepare an organic electroluminescent device, so that the maximum external quantum efficiency of the device in a near-infrared regionis greatly improved, and the performance of the organic near-infrared electroluminescent device is obviously improved.

The invention relates to an organic electroluminescence device with high electronic filling efficiency and a preparation method of the organic electroluminescence device. The organic electroluminescence device comprises a glass base plate, an anode, a hole filling layer, a hole transmitting layer, a luminescence layer, an electronic transmitting layer, an electronic filling layer and a cathode, wherein the anode, the hole filling layer, the hole transmitting layer, the luminescence layer, the electronic transmitting layer, the electronic filling layer and the cathode are sequentially stacked on the glass base plate from bottom to top, the electronic transmitting layer is divided into an upper electronic transmitting layer and a lower electronic transmitting layer, an Al membrane electrode layer with a lattice structure is arranged between the upper electronic transmitting layer and the lower electronic transmitting layer, voltage U1 is connected in parallel between the cathode and the Al membrane electrode layer with the lattice structure, and voltage U2 is connected in parallel between the anode and the Al membrane electrode layer with the lattice structure. Through the addition of the Al membrane electrode layer with the lattice structure, the electronic filling efficiency and the luminescence efficiency of the organic electroluminescence device can be effectively improved. Because the Al membrane electrode layer with the lattice structure is in a hollow structure, the electronic transmitting layer is still a whole, the interface potential barrier cannot be increased, and in addition, the voltage exerted on the electronic transmitting layer can be changed. The electronic transmitting capability is enhanced for reaching the current carrier filling balance.

The invention discloses a rare earth-doped multi-layer luminescent glass fully covered in the near-infrared band, which is a rare-earth-doped multi-layer luminescent glass fully covered in the near-infrared band. It is characterized in that the multi-layer luminescent glass includes the following two layers of luminescent glass layer; wherein, the raw material of the first luminescent glass layer contains functional component A: the functional component A contains YbF 3 , TmF 3 、HoF 3 and ErF 3 ; The raw material of the second luminescent glass layer contains NdF 3 . The invention also discloses the preparation method and application of the glass. The multi-layer luminous glass described in the present invention has a wide coverage range of wave bands and high luminous intensity. The invention also provides a preparation method of the multilayer luminescent glass and its application as an optical fiber in optical fiber communication devices such as optical fiber amplifiers. The use of the multi-layer luminescent glass can realize near-infrared full-band luminescence in the same device, and provides a basis for the miniaturization of near-infrared devices.

The invention discloses a CHI3L1 / PC III detection card and a preparation method and application thereof, and belongs to the field of nano materials and nano medicine, an adopted rare earth nano probe is sodium yttrium fluoride coated with erbium sodium fluoride of a core-shell structure, the particle size ranges from 20 nm to 30 nm, the rare earth nano probe is composed of NaErF4 @ NaYF4, NaErF4 is of a total erbium-doped core structure, NaYF4 is a shell layer, and @ indicates that the NaYF4 is coated on the surface of the NaErF4. The nano-probe is a rare earth fluoride nano-material and has the advantages of low background, long luminescence life, strong fluorescence signal, high signal-to-noise ratio and the like, the probe is connected with the antibody through a covalent bond, the labeled product is stable, and the nano-probe has the characteristics of high sensitivity, high accuracy, rapidness, simplicity and convenience in detection and the like, and can assist doctors in judging whether a patient is subjected to hepatic fibrosis or not in the early stage.

The invention discloses an organic blue luminescent material whose general structural formula is shown as I, wherein, Ar 1 and Ar 2 are the same or different aryl groups, R 1 and R 2 same or different, R 1 and R 2 are independently selected from alkyl or aryl. The invention also discloses a preparation method of the organic blue luminescent material. The organic blue luminescent material can be synthesized through a simple one-step C-N coupling reaction, the yield can be as high as 98%, and the luminescent quantum efficiency is 0.43. The prepared organic blue light-emitting material has the characteristics of simple structure, easy preparation, high luminous efficiency and the like. The organic blue luminescent material obtained by the invention has potential applications in fields such as organic electroluminescent devices.

The invention discloses a rare earth luminescent material with enhanced visible light / NIR-II emission. The structural formula of the material is NaErF4: 10% Yb, 0.5% Tm@NaGdF4: 20% Yb, and X% Ce@NaGdF4, X = 1-10, the particle size is 20-100 nm, and the material can be used for visible light and near-infrared two-region biological imaging. Compared with reported quantum dots, single-walled carbon nanotubes and small organic molecules with NIR-II emission, the material has the advantages of lower toxicity, narrower band gap emission, controllable size and efficient near-infrared light emission. Besides, Ce3+ is doped in the structure of the material, so that not only is the characteristic emission of Er3+ in NIR-II effectively enhanced, but also luminescence quenching of Er3+ in a visible region is avoided, and finally, the material has relatively strong up-conversion single-band red light emission and NIR-II emission at the same time. Therefore, the material as a bimodal fluorescent probe has potential application value in imaging in a visible region and NIR-II.