72results about How to "Improved Spectral Stability" patented technology

The invention, belonging to photoelectric material scientific and technical sphere, relates the new handling method of diarylamine and carbazoles materials and the application as the hole transmission material. Compared with the untreated material, the dead-end diarylamine and carbazoles poessess the high heat stability and glass transition temperature. Comprared with the other methods of preparing the material, the handling method has the following advantages: 1. convenient handling method, simple technology; 2. mild reaction condition, not needing transient metal accelerant; 3. high productivity, direct processing polymeric material; 4. mass production. The said hole transmission material will become the photoelectric material of low cost and commercialization potentiality.

A homogeneously illuminating ophthalmic instrument includes an illumination device having a source of illumination, a homogenizing unit and a projection device, at least one organic or inorganic source of radiation with spectrally selective emission being used as a source of illumination. The illumination generated in this way enables correspondingly adapted visual and/or digital observation, recording or display of the examined regions of the eye by a visualizing unit.

The invention relates to an optical fiber comprising a core and a cladding comprising a core material and a cladding material, respectively, wherein said fiber is a non-linear microstructured optical fiber, said microstructured optical fiber being obtainable by a method comprising loading with hydrogen and/or deuterium and optionally anneal and/or irradiation hereby the lifetime of the fiber may be extended in high power applications.

The invention relates to a electro luminescent blue fluorene polymer with stable optical spectrum, preparation and application thereof. Backbone chain of the inventive polymer has a fluorene structural unit and a sulfurous anhydride fluorene structural unit. The preparation includes steps of preparing sulfurous anhydride fluorene monomer and Suzuki coupling polymerization. Electro luminescence optical spectrum stability is improved by introducing sulfurous anhydride structural unit into backbone chaine of poly fluorenes, so as to obtain a novel poly fluorenes blue optic material. Obtained blue electroluminescent poly fluorenes conjugated polymer with sulfurous anhydride fluorene structural unit has good optical spectrum stability.

The object of the invention is to provide an adhesive composition attaining, in a single layer, both adhesiveness capable of direct attachment to a glass plate disposed on the front face of a display device and desired optical filter functions and hardly undergoing the change in spectral characteristics attributable to deterioration in a light absorbing agent, even during long-time use, particularly at high temperature under high humidity, as well as an optical filter using this adhesive composition. The object is solved by an optical filter comprising an adhesive layer having optical filter functions, comprising a block copolymer (I) having at least a specific triblock structure in its molecule and having a weight average molecular weight of 50,000 or more and a molecular weight distribution (Mw/Mn) of less than 1.5, a resin (IV) having the glass transition temperature of 60° C. or more and one or more light absorbing agents (III) each having light absorption in a predetermined wavelength region.

The invention discloses a donor-acceptor type fluorenyl nanometer grid material, a preparation method and application thereof. The nanometer grid material is of a square-ring-shaped rigid structure formed through alternative arrangement of fluorenyl ramification regarded as electron donor units and electron acceptor units. The preparation method comprises the following steps that a precursor with tertiary alcohol and aromatic nucleus terminal based hydrogen inhibitor dual binding sites is dissolved in organic solvent; at the room temperature, a catalyst is added, and stirring and reacting are conducted; and the reaction is conducted for 5 min-12 h, and products are obtained through chromatogram column separation. The donor-acceptor type fluorenyl nanometer grid material has the advantages that the compounding method is modularized, extensibility and stability of thermology, electrochemistry and photology are high; dependency of thin film solvent is reduced; large-area soluble processing is achieved; the size of apertures is accurately regulated and controlled; and accurate regulation an control of band gaps and energy level arrangement are achieved. The donor-acceptor type fluorenyl nanometer grid material has potential application prospects in the fields of photoelectric function materials of organic solar cells, storage and memory resistor, sensing, detecting and the like.

A Raman spectroscopic apparatus utilizing a self-aligned non-dispersive external cavity laser as the excitation light source. The output spectrum of the laser is narrowed and stabilized by a volume Bragg grating to provide high spectral brightness. A high throughput optical system is used for Raman scattering signal excitation and extraction, which takes full advantage of the high spectral brightness of the laser source.

The invention provides an ultra-short length erbium-ytterbium co-doped high gain glass fiber superfluorescence light source which includes: a semiconductor laser (LD) 1, a coupling lens system 2 (including a collimating lens 3 and a focusing lens 4), a signal light total reflective mirror 5, a high gain fiber 6 (a pumped light input terminal is a vertical cutting terminal 8 in figure (a) structure and is a bevel terminal 7 in figure (b) structure, a superfluorescence output terminal is the bevel terminal 7 in figure (a) and (b)). The superfluorescence light source uses basic structure, and realizes superfluorescence output with high power, wide broad-band, stabile average wavelength in the ultra-short length high gain fiber. The ultra-short length erbium-ytterbium co-doped high gain glass fiber superfluorescence light source has has great practical value for future integrated optics, new generation fiber communications technology and fiber sensor technology.

The invention relates to a rhombic cell containing spiral rings and a synthesis method thereof and belongs to the fields of nanotechnologies and organic electrons. The rhombic cell containing the spiral rings is hereinafter to be referred as the rhombic cell, is a closed-loop structure formed by connection of two types of fluorenyl groups and derivatives thereof by a manner of central symmetry, and has the distinctive characteristic of edges and corners. The structural formula of the rhombic cell is described in the specification, wherein R is a common alkyl chain. The synthesis method relatesto synthons containing the spiral rings, and forms the rhombic cell by Friedel-Crafts reaction. The rhombic cell and the synthesis method have the beneficial effects that by reasonable molecular design and utilization of the Friedel-Crafts reaction with the advantages of mild reaction condition, high yield and selectivity, simple aftertreatment and green and nontoxic effect and the like, the problems of complex steps, toxic aftertreatment and larger pollution and the like in the traditional synthesis of closed-looped molecules are overcome.

An optical filter including an adhesive layer attaining, in a single layer, both adhesiveness and desired optical filter function and hardly undergoing the change in spectral characteristic attributable to deterioration of a light absorbing agent, even after long-time use, particularly at high temperature under high humidity. The optical filter includes: (A) an acrylic copolymer containing (meth)acrylate having a hydroxyl group as a constituent, not containing a monomer having a carboxyl group and a monomer having an amide group as constituents, and substantially not containing a carboxyl group residue; (B) an isocyanate compound; and (C) one or more light absorbing agents each having light absorption in a predetermined wavelength range.

Metal halide perovskite crystals, composite materials that include metal halide perovskite crystals and a polymeric matrix material, devices that include metal halide perovskite crystals, and methods of forming metal halide perovskite crystals, composite materials, and devices. The devices may include optoelectronic devices, such as light-emitting diodes. The light-emitting diodes may emit red light.

The invention discloses a fluorenyl donor/receptor type nano polymer as well as a preparation method and application thereof. In a nano grid polymer, a fluorenyl derivative is used as electron donor units in nano grid fragments, and the electron donor units and electron receptor units are arranged alternatively to form a square annular rigid structure. The preparation method comprises the following step: performing a polymerization reaction on a nano grid fragment (II) and a polymerization fragment (III) with preserved halogen end groups, thereby obtaining the polymer. The polymer material disclosed by the invention has the advantages that a synthesis mode is modularized, high extensibility and high thermal, electrochemical and optical stability can be achieved, film solvent dependency can be alleviated, large-scale soluble processing can be achieved, aperture sizes can be precisely adjusted and controlled, precise regulation and control on band gap and energy level arrangement can be achieved, and the like; and the polymer material has potential application prospects in fields of photoelectric functional materials for organic solar batteries, memories and memory resistors, sensors, detectors and the like.

The invention discloses organic semiconductor materials containing 2,9-dialkyl-6-alkoxy phenanthridine and a preparation method and an application thereof. The organic semiconductor materials are prepared by carrying out a reaction of 2,9-dialkyl-6-alkoxy phenanthridine halogenated derivatives and a monomer containing an aromatic group structure under a metal catalyst, wherein the aromatic group and a 2,9-dialkyl-6-alkoxy phenanthridine unit are connected in a conjugate manner. The invention discloses a method for synthesis of 2,9-dialkyl-6-alkoxy phenanthridine by a phenanthridone isomerization reaction; a series of organic semiconductor materials containing the 2,9-dialkyl-6-alkoxy phenanthridine unit are synthesized and are applied in the field of organic optoelectronic devices, and solar cell devices with high open circuit voltage and deep blue polymer blue light devices are obtained.

The invention discloses a multi-wing shaped deuterium lamp UV light source which comprises a deuterium lamp (1), a multi-wing shaped housing (2), a temperature control fan (3), a diaphragm (4), a photoelectric probe (5) and a coupling lens (6). Deuterium lamps are widely used in a plurality of high-precision analyzing apparatuses and equipment, the consumables are short in service lifetime, and have strict requirements on temperature during working. The multi-wing shaped deuterium lamp UV light source utilizes the heat transfer mode of diffusion in cooperation with conduction to realize the heat dissipation of the deuterium lamp by forced air cooling. The multi-wing shaped housing and the temperature control fan are used to control the working temperature of the deuterium lamp to the optimum temperature range, thereby prolonging the service lifetime of the deuterium lamp and improving the light source stability. The multi-wing shaped deuterium lamp UV light source is especially suitable for environmental temperature changes. Stable and reliable mechanical interface and electronic interface facilitate use of a deuterium lamp, the deuterium lamp is simple and fast for replacement, and adjustment is not needed. The coupling lens, the diaphragm and the photoelectric probe can improve the integration level and expansibility of the deuterium lamp light source.

The invention provides a fluorescent/phosphorescent mixed white light OLED of which the light-emitting layer is composed of not less than two fluorescent light-emitting layers formed by the non-doped blue fluorescent material and phosphorescent light-emitting layers which are embedded among the fluorescent light-emitting layers. Any one phosphorescent light-emitting layer is composed of single phosphorescent material of which the thickness is not greater than 0.1nm. The mixed light emitted by different colors of phosphorescent material of all the phosphorescent light-emitting layers is complementary with the blue light emitted by the blue fluorescent material. Different colors of phosphorescent light-emitting layers are separated by 1-3nm blue fluorescent light-emitting material. The total thickness of the light-emitting layers is less than 30nm. Energy transmission between different colors of light-emitting material is changed by changing the order of embedding of the ultrathin phosphorescent light-emitting material in the blue fluorescent light-emitting layers or the thickness of different colors of ultrathin layers so that the emission spectrum of the white light OLED can be easily improved and the relatively ideal white light emission can be acquired.

The invention discloses a blue oligomer based on a dibenzothiophene-S,S-dioxide unit and a preparation method and application of the blue oligomer. The blue oligomer is mainly characterized by comprising a fluorene structure unit and the dibenzothiophene-S,S-dioxide structure unit. The preparation method mainly comprises the step of preparation of the blue oligomer based on the dibenzothiophene-S,S-dioxide unit. Due to the fact that the electroluminescence efficiency and the spectral stability are improved by introducing the dibenzothiophene-S,S-dioxide structure unit into the oligomer, the novel oligomer blue-light emitting material is obtained. According to the obtained blue oligomer based on the dibenzothiophene-S,S-dioxide unit, an electroluminescence device prepared through film formation of a solution processing method is high in efficiency, good in spectral stability and suitable for being adopted as a light-emitting layer of a light-emitting diode and a flat-panel displayer.

The invention provides a fused ring compound and an organic luminescent device thereof, and relates to the technical field of an organic photoelectric material. On one hand, the carbazole type structure shows good stability due to relatively high oxidation-reduction potential values; the carbazole type structure is introduced, so that the thermal stability of the fused ring compound is improved. On the other hand, a low-molecular band gap dutrex conjugated unit is introduced, so that the effective conjugated length of the system is expanded; some structures with space torsional strain are used, so that the intermolecular Pi-Pi stacking and the excimer formation are effectively inhabited; the spectrum stability and the glass transition temperature of compounds are improved. On the other hand, fluorene and fluorene derivatives have the characteristics of structure modification simplicity, wide energy gap, high quantum efficiency, high luminescent efficiency, good electrical and optical properties and the like, so that the organic luminescent device prepared by using the fused ring compound provided by the invention shows the advantages of high efficiency and low driving voltage particularly when being used as a hollow injection material in the organic luminescent device, and is superior to the existing common OLED (organic light emitting diode) device.

The invention provides a red organic electroluminescent device which comprises a substrate, an anode layer, an anode modification layer, a hole transport-electronic barrier layer, a hole leading luminescent layer, an electronic leading luminescent layer, a hole barrier-electronic transport layer, a cathode modification layer and a cathode layer which are sequentially arranged. The electronic leading luminescent layer comprises 0.05 weight percent to 2.0 weight percent of organic sensitized material, 1.0 weight percent to 8.0 weight percent of red organic luminescent material and the balance of electronic organic main body material, wherein the organic sensitized material is a transition metal complex with matched energy level. According to the invention, the organic sensitized material is doped in the electronic leading luminescent layer, the organic sensitized material takes effects of a charge carrier deep restraint center and an energy transfer step and is beneficial for balancing distribution of charge carriers, widening a luminous interval of the device and accelerating energy transfer from the main body material to the luminescent material so as to improve efficiency of the device and reduce a working voltage of the device.

The invention provides a white organic light-emitting device. The white organic light-emitting device is formed by sequential arrangement of a substrate, an anode layer, an anode modification layer, a hole transport-electron barrier layer, a hole leading light-emitting layer, an electron leading light-emitting layer, a hole barrier-electron transport layer, a cathode modification layer and a cathode layer, wherein the electron leading light-emitting layer comprises the following components in percentage by weight: 0.05-2.0 percent of organic sensitized materials, 8.0-25.0 percent of blue organic light-emitting materials and the balance of electron-type organic main body materials; the organic sensitized materials are transition metal complexes of which the energy level and the energy are matched. According to the white organic light-emitting device, the organic sensitized materials are doped into the electron leading light-emitting layer and function as a deep current carrier constraint center and an energy transfer ladder, so that a light-emitting interval is expanded, the transfer of the energy from the main body material to the light-emitting material is accelerated, and therefore, the white organic light-emitting device provided by the invention has higher efficiency and higher color recovery coefficient.

The invention belongs to the technical field of preparation of perovskite quantum dots, and particularly relates to a multifunctional ligand modified mixed halogen perovskite quantum dot and application thereof. The structure of the multifunctional ligand not only contains carboxyl groups and amino groups which can passivate surface defects of mixed halogen perovskite quantum dots, but also contains functional groups which can form hydrogen bonds with halogen in the mixed halogen perovskite quantum dots. Experiments prove that the multifunctional ligand interacts with the mixed halogen perovskite quantum dots to passivate the defects of the mixed halogen perovskite quantum dots and inhibit possible phase separation of the mixed halogen perovskite quantum dots in an electric field. The efficiency of a light-emitting diode prepared from the mixed halogen perovskite quantum dot modified by a mixed halogen perovskite quantum dot solution passivated and modified by the multifunctional ligand exceeds 18%, and spectrum stability is good.

The invention provides a preparation method of a pure blue-light perovskite light-emitting layer. The method comprises the following steps: S1, acquiring a perovskite precursor solution which contains halide which is bromide; and S2, coating the perovskite precursor solution on a substrate to form, then adding an anti-solvent solution containing chloride onto the substrate to carry out in-situ halogen ion exchange, and then carrying out post-treatment to obtain the chlorine-bromine mixed pure blue light perovskite luminescent layer. According to the method, the problem of difficult blue shift of a luminescence peak caused by low solubility of chloride ions in a perovskite precursor solution is solved, and the concentration of chloride is adjusted, so that the proportion of chloride ions and bromide ions is adjusted to realize regulation and control of the luminescence peak in a pure blue light wave band; and according to the method, the problem of component segregation caused by preferential crystallization of chlorine-rich perovskite in preparation of mixed halogen perovskite by a traditional solution method is solved, and the distribution uniformity of halide ions in perovskite is improved, so that the spectral stability of a blue-light perovskite light-emitting diode is improved.

The present invention discloses a non-doped white light luminous layer series organic light-emitting device. The device comprises, from bottom to top, a substrate, an anode, a hole injection layer, a hole transport layer, a luminous layer, an electron transport layer, an electron injection layer, a charge generation layer, a hole injection layer, a hole transport layer, a luminous layer, an electron transport layer, an electron injection layer and a cathode, wherein the luminous layers are one or more of a non-doped yellow phosphor layer, a non-doped blue phosphor layer, a non-doped red phosphor layer and a non-doped green phosphor layer; a spacer layer is arranged between the luminous layers; and the thickness of the luminous layer is in a range of 0.01 to 200nm, the thickness of the luminous layer is in a range of 0.01 to 100nm, and the thickness of the spacer layer is in a range of 0.1 to 30nm. The non-doped white light luminous layer series organic light-emitting device has a simple structure and a simple process, is stable in spectrum, and has the advantages of simple and convenient process, low cost and the like, and usage of any doping technologies is not involved in the luminous layers.