350 results about "Electron transporting material" patented technology

The invention relates to the technical field of preparation of organic photoelectric materials, in particular to an electron transport material, an OLED with the electron transport material and an organic light-emitting device with the electron transport material. According to the electron transport material disclosed by the invention, triazinyl is taken as a framework, phenyl and cyano-substituted biphenyl is taken as a specific substituent group, methyl, adamantyl, phenyl and pyridyl are limited to be matched, and the electron transport material is used as a material for forming an electron transport layer to manufacture an organic electroluminescent device, so that the evaporation process of the device can be smoothly carried out; and the light-emitting efficiency of the organic light-emitting device is effectively improved, and the application prospect is very good.

The invention discloses a multicolor photoelectric response synaptic device and a preparation method thereof. The multicolor photoelectric response synaptic device is of a multi-layer structure. The multilayer structure comprises a transparent conductive electrode layer, a hole transport material layer, a lead-free perovskite layer, an electron transport material layer, an organic semiconductor charge transfer compound layer and a metal electrode layer in sequence along the light incidence direction. The preparation method comprises the steps of preparing the transparent conductive electrode layer; sequentially preparing a hole transport material layer, a lead-free perovskite layer, an electron transport material layer and an organic semiconductor charge transfer compound layer on the transparent conductive electrode layer through a spin coating method; and preparing the metal electrode layer on the organic semiconductor charge transfer compound layer through vacuum evaporation. The multicolor photoelectric response synaptic device is reasonable in structural design, can realize ultraviolet-visible-near infrared multicolor photoelectric synaptic function simulation, can realize a color identification function on red light, green light and blue light in a visible light wave band, and has a good application prospect.

The present invention relates to a tandem organic light-emitting device comprising a plurality of light-emitting layers and, more specifically, to an organic light-emitting device comprising a novel charge generation layer (CGL). The CGL according to the present invention has a first compound having 4,5-diazaspirobifluorene as the core thereof, which is applied as an electron transport material of an N-type CGL. In addition, a second compound having at least one tertiary amine as the core thereof is applied as a hole transport material of a P-type CGL, and the combination of the first compound and the second compound lowers the driving voltage of the device and further improves the efficiency and lifespan thereof. Furthermore, the organic light-emitting device of the present invention can achieve further improved device performance through a CGL comprising the first compound, lithium or ytterbium, the second compound and a third compound at the same time.

An organic electroluminescent material is disclosed. The organic electroluminescent material is a compound with a structure shown in a formula 1, the compound can be used as a main body material, an electron transport material or a hole blocking material in an organic electroluminescent device, and the comprehensive performance of the device can be improved, such as low driving voltage, high device efficiency and remarkably prolonged device service life. The invention further discloses an organic electroluminescent device containing the compound with the structure shown in the formula 1 and a compound composition.

The invention discloses a preparation method of a perovskite-based thin film laminated solar cell, and the method comprises the following steps: S1, taking transparent conductive glass as a substrate, and carrying out the spin coating of an electron transmission material on the substrate to form an electron transmission layer; s2, a perovskite precursor solution prepared in advance is spin-coated, and a perovskite absorption layer is obtained after primary heat treatment; s3, depositing a nano silicon dioxide porous interface layer, spin-coating a self-repairing polymer containing ionic liquid, and performing secondary heat treatment to obtain a modified perovskite absorption layer; s4, spin-coating a hole transport layer; s5, performing vacuum evaporation on a metal counter electrode layer to obtain a perovskite top cell; and S6, stacking and compounding the perovskite-based thin film and a crystal silicon bottom cell to form the perovskite-based thin film laminated solar cell. According to the preparation method of the perovskite-based thin film laminated solar cell, the photoelectric conversion efficiency and the stability of the cell are improved, the self-repairing capability and the long-term durability of the cell are enhanced, and the high-standard requirement of commercial application can be met.

The invention relates to a perovskite solar cell and a preparation method thereof, a photovoltaic module, a system and an electric device. The perovskite solar cell comprises a transparent electrode layer, and a perovskite layer, an electron transport layer and a metal electrode which are sequentially arranged on the transparent electrode layer; the electron transport layer comprises an organic electron transport material, a first additive and a second additive; the first additive is prepared from one or more of polymethyl methacrylate, a methacrylic acid-methyl methacrylate copolymer, a 4-vinylpyridine-styrene copolymer, polyacrylonitrile and poly (4-vinylpyridine); the second additive comprises one or more of a compound shown as a formula I and a compound shown as a formula II. The perovskite solar cell provided by the invention has relatively high photoelectric conversion efficiency and relatively good stability.

The invention relates to the technical field of electroluminescence, and discloses a laminated organic light-emitting device and application thereof, and the laminated organic light-emitting device comprises an anode layer, a first light-emitting unit, an electron transport layer, an interface modification layer, a connection layer, a second light-emitting unit and a cathode layer which are sequentially arranged from bottom to top; the electron transport layer comprises a hole blocking layer and an n-type electron transport layer; wherein the n-type electron transport layer is composed of an n-type dopant and an organic electron transport material, has the functions of electron transport, charge separation and injection and regulation and control of the optical microcavity effect of the laminated device, can simplify the electron transport and connection layer structure of the laminated device, and effectively improves the conductivity of the laminated device; according to the laminated organic light-emitting device, the voltage drop of the body is obviously reduced, and the interface electron injection barrier is reduced, so that the laminated organic light-emitting device has the advantages of low driving voltage, high efficiency and long service life, and the effect of adjusting the optical microcavity of the device can be achieved by utilizing the n-type electron transport layer.

The invention relates to an electrophotographic photoreceptor, a process cartridge, and an image forming apparatus. The electrophotographic photoreceptor includes a conductive substrate and a photosensitive layer of a single-layer type disposed on the conductive substrate. The photosensitive layer has an absorption coefficient of 0.008 or less at a wavelength of 1000 nm and contains a binder resin, a charge generating material, an electron transporting material, and a hole transporting material. The charge generating material is at least one selected from a hydroxygallium phthalocyanine pigment and a chlorogallium phthalocyanine pigment and is contained in an amount of 0.9% by weight or more and 1.8% by weight or less relative to the binder resin.

The invention provides an oxazolobenzocarbazole compound, an organic electroluminescent device and a display device, and relates to the technical field of organic electroluminescent materials. The oxazolobenzocarbazole compound disclosed by the invention has a proper energy level and good electron mobility, and can be used as an electron transport material to effectively reduce the potential barrier of electron transport and effectively block the diffusion of holes to one side of an electron transport layer, so that the luminous efficiency of a device can be further improved, the driving voltage can be reduced, and the service life can be prolonged.

The invention belongs to the technical field of organic photoelectric materials and devices, and discloses an organic electroluminescent device, a preparation method thereof and a display device. The device sequentially comprises an anode layer, a hole transport layer, a light-emitting layer, a second electron transport layer, a first electron transport layer and a cathode layer, wherein the first electron transport layer is composed of an n-type dopant and a first electron transport material. According to the adopted electron transmission structure, small electron injection barriers are arranged between the second electron transmission layer and the first electron transmission layer and between the second electron transmission layer and the main body material, and the organic light-emitting device prepared through the electron transmission structure achieves good voltage stability in the aging process; therefore, the problem of power consumption increase of the organic light-emitting device in the aging process is solved. And a relatively small electron injection barrier can reduce the driving voltage of the device, so that the organic light-emitting device with low driving voltage, long service life and stable voltage is obtained.

To provide a novel light-emitting device, a light-emitting device with excellent luminous efficiency, a light-emitting device with excellent lifetime, or a light-emitting device with a low driving voltage.SOLUTION: A light-emitting device includes an anode, a cathode, and an EL layer present between the anode and the cathode. The EL layer has a light-emitting layer and an electron transport layer. The electron transport layer is present between the light-emitting layer and the cathode. The electron transport layer includes an electron transport material. The electron transport material is an organic compound having a first skeleton, a second skeleton, and a third skeleton. The first skeleton has a function of transporting electrons. The second skeleton has a function of accepting holes. The third skeleton has a single ring and a heterocyclic aromatic ring that is π electron deficient type.SELECTED DRAWING: Figure 1

The invention relates to the field of organic light-emitting devices, and particularly discloses a laminated organic light-emitting device and application thereof. The laminated organic light-emitting device comprises an anode layer, at least two light-emitting units, a cathode layer and a connecting layer used for connecting two adjacent light-emitting units which are sequentially arranged from bottom to top, the connecting layer comprises a first connecting layer and a second connecting layer which are sequentially arranged from bottom to top; the first connecting layer is made of an n-type dopant material and an organic electron transport material, and the doping concentration of the n-type dopant material of the first connecting layer is gradually reduced from one side of the second connecting layer to one side of the light-emitting unit; the second connection layer is composed of a p-type dopant material and an organic hole transport material. The connecting layer provided by the invention has stronger carrier generation capability and lower driving voltage drop, and can effectively avoid the exciton quenching effect of the dopant on the light-emitting unit, so that the laminated organic light-emitting device has the characteristics of low driving voltage, high efficiency and long service life.

The invention belongs to the technical field of luminescent materials, and discloses a heterocyclic compound and an organic electroluminescent device. The structural general formula of the heterocyclic compound is as shown in a formula (1): # imgabs0 # formula (1). The heterocyclic compound provided by the invention has the advantages of low driving voltage, high luminous efficiency, long device life and the like, and can be used as an electron transport material, a hole blocking layer material and an N-type charge generation layer material in OLED luminescent devices.

The invention belongs to the technical field of perovskite photovoltaic materials, and particularly relates to a Y-type non-fullerene acceptor electron transport material driven by coordination supramolecular action, and a preparation method and application of the Y-type non-fullerene acceptor electron transport material. According to the invention, a core of benzothiadiazole of Y6 is substituted by high-polarity benzoline and crown ether, and two types of Y-type NFAs, Y-Phen and Y-CE are developed. The Y-Phen and the Y-CE are respectively used as the ETL of the perovskite solar cell to obtain 25.03% and 25.61% of laboratory power conversion efficiency, and a device using the Y-CE as the ETL obtains 25.59% of certified power conversion efficiency which is obviously higher than the power conversion efficiency (23.58%) of a device using Y6 as the ETL. Meanwhile, the degradation rate of the optimized device to PCE is lower than 10% after 1440 hours, and the device has excellent performance in preparation of perovskite solar cells.

The invention relates to a preparation method of a perovskite photovoltaic cell, the cell is suitable for being arranged on an external substrate, and the preparation method comprises the following steps that the substrate serves as a supporting structure of the solar cell, and a transparent conductive substrate is deposited on the substrate; preparing a hole transport layer on the transparent conductive substrate; the method comprises the following steps: preparing and treating a perovskite material, and preparing a perovskite precursor solution by using a mixed solvent system of dimethyl sulfoxide, 2-methyltetrahydrofuran and acetonitrile; coating a perovskite precursor material on the hole transport layer to form a perovskite light absorption layer; depositing an electron transport material on the perovskite light absorption layer to form an electron transport layer; preparing a hole blocking layer on the electron transport layer, and finally depositing a back electrode on the hole blocking layer; organic unification of high-performance preparation and green manufacturing is realized.

The invention provides a series of organic chiral micromolecule auxiliary functional materials which can be applied to main body materials, electron transport materials or hole transport materials of functional layers in circular polarization organic light-emitting diodes, and belongs to the technical field of organic electroluminescent materials. According to the invention, chiral oxazoline, chiral binaphthyl, chiral spiro, chiral paracyclophane and chiral 1, 2-cyclohexanediamine are used as chiral construction units, and are introduced into main body, electron or hole transport material molecules to construct a series of chiral compounds containing chiral oxazoline, chiral binaphthyl, chiral spiro, chiral paracyclophane and chiral 1, 2-cyclohexanediamine, and the chiral compounds containing chiral oxazoline, chiral binaphthyl, chiral spiro, chiral paracyclophane and chiral 1, 2-cyclohexanediamine are introduced into main body, electron or hole transport material molecules. The organic chiral auxiliary functional material is a main material, an electron transport material or a hole transport material based on 1, 2-cyclohexanediamine, and the preparation of a circular polarization organic light emitting diode device with high luminous efficiency and high luminous asymmetry factor is realized by using the organic chiral auxiliary functional material.

The invention discloses an electron transport material, an electron transport layer and an organic electroluminescent device, and belongs to the technical field of organic electroluminescent materials. The electron transport material is a nitrogen-containing heterocyclic compound, and simultaneously contains a pyridine ring and a pyrimidine ring connected with the pyridine ring. By introducing a power supply group with a steric effect, the nucleophilicity of similar nitrogen atoms on a pyrimidine ring connected with a pyridine ring can be shielded, so that the coordination activation n-doping effect of a target chelated nitrogen atom and an n-type doping agent is enhanced, and the coordination stability in the coordination activation n-doping effect is promoted; by introducing a power-supplying group to modify the nitrogen-containing heterocyclic unit, the electron nucleophilicity of the nitrogen-containing heterocyclic unit is enhanced, so that the electron transport material can form a more stable complex with the n-type dopant, and the conductivity of the electron transport layer of the light-emitting device is improved; therefore, the driving voltage of the organic light-emitting device can be reduced, the efficiency of the device is improved, and the service life is prolonged.

The invention relates to a light-emitting device and a manufacturing method thereof. The light-emitting device comprises a first electrode layer, a first light-emitting layer, a buffer layer, a connecting layer, a second light-emitting layer and a second electrode layer which are sequentially stacked, wherein the connecting layer is arranged on the side, away from the first light-emitting layer, of the buffer layer and comprises a P-type charge generation layer and an N-type charge generation layer, the N-type charge generation layer is located between the P-type charge generation layer and the buffer layer, and the N-type charge generation layer comprises a first N-type electron transport material; the buffer layer comprises at least one sub-buffer layer, and the sub-buffer layer comprises at least one of a hole blocking material, an electron transport material and a second N-type electron transport material. According to the invention, the structure of the Tandem OLED is simplified, the process is simplified, the production cost can be effectively reduced, and the performance of the existing Tandem OLED is maintained or further improved.

The present invention relates to novel materials and electronic devices, in particular organic electronic devices such as OLEDs (organic light emitting diodes) containing these materials, for example as electron transport materials, hole blocking materials or matrix materials. The invention also relates to mixtures that contain these novel materials.

The invention relates to an organic compound which contains an azaspiro group and is shown in a formula O, an electron transport material and an organic electroluminescent device. The compound is used as the electron transport material in the organic electroluminescent device and shows good electroluminescent performance. # imgabs0 #

The present application relates to the technical field of electroluminescent device preparation, in particular to an OLED light-emitting composition and an electroluminescent device comprising the composition. The OLED light-emitting composition comprises an electron transport material and a light-emitting material, the electron transport material combines o-phenanthroline and a xanthene group, and has high electron mobility and a low energy level. A boron-nitrogen compound skeleton structure with multiple benzene rings is introduced into the light-emitting material, the skeleton structure is twisted in a planar configuration, the alkyl substituents contained in the large steric group are adjusted, the π-π mutual attraction caused by the introduction of benzene rings is weakened, the intermolecular force is further weakened, and the adverse effects of concentration quenching on efficiency are weakened. The OLED device prepared by using the composition of the present application has low starting voltage, high light-emitting efficiency and better service life, can meet the requirements of current panel manufacturing enterprises for high-performance materials, and has great commercial value.

The present application aims at providing a material for an organic EL element having excellent hole injection and transport properties, electron blocking ability, stability in a thin film state, and durability, and further, by combining the material with various materials for an organic EL element having excellent hole and electron injection and transport properties, electron blocking ability, stability in a thin film state, and durability so that the characteristics of each material can be effectively exhibited, an organic EL element having high efficiency, low driving voltage, and long life is provided. The arylamine compound having a specific structure in the present application is excellent in hole injection and transport ability, stability, and durability of a thin film, and thus, by selecting the arylamine compound having a specific structure as a material for a hole transport layer, holes injected from the anode side can be efficiently transported. Further, various organic EL elements combined with an electron transport material having a specific structure and the like exhibit good element characteristics.

The present application relates to a kind of organic electron transport material and its preparation method and application, which is with triazine group as center core, pyridine is the conjugated organic small molecule material of outer ring substitution, the synthetic route of the organic small molecule material is simple, low in cost, higher yield, less environmental pollution;With the organic small molecule as electron transport layer, the problem of charge injection imbalance is well solved, especially in quantum dot light emitting diode (QLEDs), greatly improves the QLEDs device performance and stability, which has extremely great significance to the application field of QLEDs.

A perovskite solar cell and a preparation method therefor, a photovoltaic module, a system, and an electric device. The perovskite solar cell comprises a transparent electrode layer, and a perovskite layer, an electron transport layer, and a metal electrode which are sequentially arranged on the transparent electrode layer; the electron transport layer comprises an organic electron transport material, a first additive, and a second additive; the first additive comprises one or more of poly(methyl methacrylate), a methacrylic acid-methyl methacrylate copolymer, a 4-vinylpyridine-styrene copolymer, polyacrylonitrile, and poly(4-vinylpyridine); and the second additive comprises one or more of a compound of formula I and a compound of formula II. The perovskite solar cell has high photoelectric conversion efficiency and good stability.

The present application provides a compound of general formula (I), which can be used as an electron transport material. This compound has a parent structure of condensed heterocyclic substituted anthracene, with high bond energy between atoms, good thermal stability, and is conducive to intermolecular solid-state packing. At the same time, this compound has appropriate energy level levels with adjacent layers, which is conducive to the injection and migration of excitons. Using the compound of general formula (I) as an electron transport material can effectively reduce the driving voltage of the organic electroluminescent device, improve its luminous efficiency, and extend its service life. The present application also provides an organic electroluminescent device and a display device comprising the compound of general formula (I).

The present disclosure relates to an organic compound represented by formula O comprising an aza-spiro group, an electron transport material, and an organic electroluminescent device. The compound, as an electron transport material, is used in an organic electroluminescent device, and exhibits good electroluminescent performance.

The invention discloses a stretchable imidazole polyethylene electron transport material as well as a preparation method and application thereof, and belongs to the technical field of organic photoelectric materials. The stretchable imidazole polyethylene electron transport material is obtained by taking polyethylene glycol methacrylate, 2-(butylamino) carbonyl oxo ethyl acrylate and an electron transport material structural unit as raw materials in a free radical polymerization mode under the condition of an organic solvent and an initiator. According to the invention, an electron transport material structural unit is introduced into the intrinsic stretchable elastomer in a chemical cross-linking manner, so that the stretchability and photoelectric properties of the elastomer are well balanced. The stretchable imidazole polyethylene electron transport material can be used as an electron transport layer material to prepare an electroluminescent device with high stretchability, high efficiency and high stability, and can be applied to the fields of flexible display, sensing detection, wearable electronic equipment and the like.

This application relates to the technical field of perovskite solar cells, and particularly to a perovskite solar cell and a preparation method thereof. A perovskite solar cell includes a conductive thin film substrate, a perovskite photoactive layer, a hole transport layer, and an electrode layer; a doped conductive enrichment layer is formed on the surface of the conductive thin film substrate; the doped conductive enrichment layer contains conductive particles A and conductive particles B that can form a conductive network; conductive particle A is composed of an inorganic metal-based carrier and a doped metal atom; conductive particle B is at least one of ZnO, SnO2, and In2O3. This application uses a special conductive thin film as a substrate, which serves as a light-transmitting conductive material and simultaneously functions as an electron transport material to collect electrons, replacing the structure of ITO or FTO transparent conductive material + electron transport material TiO2 or SnO2, reducing the number of layers of the battery and simplifying the structure of the perovskite solar cell, eliminating the cumbersome preparation process, and improving the overall production efficiency.

The invention provides a phosphate ester compound taking 1, 3, 5-triazine or pyrimidine as a core and application of the phosphate ester compound in a perovskite light-emitting device, and the structure of the compound is as shown in a formula (I). 1, 3, 5-triazine or pyrimidine is taken as a molecular core, so that a good electron transmission effect is achieved; peripheral phosphate groups can be coordinated with lead atoms, so that the defect state density is reduced, and therefore, the compound disclosed by the invention has the functions of electron transport and passivation of perovskite materials. On one hand, the compound can be applied to a perovskite light-emitting layer to serve as a passivator, and electron transmission can be promoted while defects are passivated; on the other hand, the material can be used as an electron transport material to transport electrons to a light-emitting layer, and interface defects between the light-emitting layer and an electron transport layer can be passivated. The compound with the electron transport and passivation effects is applied to a perovskite light-emitting device, and the compound can be used as a passivator to be added to a light-emitting layer and used as an electron transport material to prepare an electron transport layer, so that the performance of the perovskite light-emitting device can be improved. # imgabs0 #

The present invention relates to an imidazoazacyclo compound and an application thereof. The compound of the present invention has a structure as shown in a formula I. The imidazoazacyclo compound of the present invention has the advantages of low sublimation temperature, good light stability, electrical stability and thermal stability, high refractive index, small difference of refractive index in a visible light area and the like, and an apparatus prepared by the compound has the advantages of low voltage, long service life, high luminous efficiency and the like and can be used in an organic luminescent apparatus. In particular, as an electron transmission material, a hole barrier layer material and a light extraction layer material, the imidazoazacyclo compound has the probability of being applied to an AMOLED industry.