580results about How to "High triplet energy level" patented technology

The invention discloses a 1,3,5-triazine derivative. The derivative is a compound with a structure of a formula I. The compound of the formula I can emit high-efficiency blue fluorescence and meanwhile has higher triplet state energy; so that the compound of the formula 1 can sensitize green and red phosphorescent doped materials while emitting the high-efficiency blue fluorescence, so that the technological conditions for preparing WOLEDs (White Organic Light Emitting Diode) are met. Meanwhile, the invention also discloses a preparation method of the compound of the formula 1 and application in preparation of the white light organic electroluminescent diode.

The invention discloses an alkyl substituted-S,S-dioxo-dibenzothiophene monomer, a preparation method and a polymer thereof. The presence of the strong electron-withdrawing group -SO2- in the alkyl substituted-S,S-dioxo-dibenzothiophene is favorable for improving the electron affinity of molecules, and the introduction of the alkyl greatly improves the dissolubility of the monomer in an organic solvent. The alkyl substituted-S,S-dioxo-dibenzothiophene monomer can form a homopolymer or a copolymer through the polymerization reaction of Suzuki, Stille and Yamamoto. The series of polymers have good dissolubility in the organic solvent, are suitable for processing solution, and have broad application prospects in the fields of organic flat displays, photovoltaic cells and organic field-effect tubes.

The invention discloses a condensed-ring compound and a preparation method and an application thereof. The condensed-ring compound has a structure represented by formula (I) or formula (II). The HOMOand LUMO energy levels of the fused-ring compound are completely separated, so that the energy gap width of the material is reduced, the three-wire energy level is improved, and the energy backflow from the object material to the main material is avoided to reduce the luminous efficiency; HOMO and LUMO energy levels are matched with adjacent materials, and the driving voltage is small. The devicehas large molecular structure size and good intramolecular conjugation, so it has good thermal stability, can avoid thermal decomposition of materials during film formation or use, avoids loss of material layer function, and improves luminous efficiency and luminous performance of the device. The invention also provides a preparation method of the fused-ring compound and its application as an organic electroluminescent material.

The invention provides a triarylamine compound and an organic electroluminescent device thereof, and relates to the technical field of organic photoelectric materials. According to the invention, a substituted or unsubstituted 9-phenyl-fluorene group and a triarylamine group containing benzoxazole / benzothiazole / benzimidazole / benzotriazole undergoes a reaction to obtain the triarylamine compound by9-position (tertiary C) connection of fluorene. The triarylamine compound has a good hole transport capability, is high in glass transition temperature, good in thermal stability, good in film-forming property, high in refractive index and simple to synthesize, can be applied to an organic electroluminescent device to serve as a hole transport layer and / or a covering layer, can effectively solvethe problems of low luminous efficiency and short service life of the organic electroluminescent device, and has the advantages of high luminous efficiency and long service life.

The present invention relates to one kind of dendrite compound and its organic electroluminescence device, and belongs to the field of organic electroluminescence technology. The compound consists of three parts, including one middle nucleus, one dendrite of carbazole unit, and one surface group. The dendrite molecule with dendrite of carbazole possessing hole transporting capacity has excellent carrier transporting capacity. At the same time, it has high form stability and high triplet state energy level, so that it may be applied as the main phosphorescence material, especially blue light phosphorescence material, in organic electroluminescence device. The made electroluminescence device has maximum light emitting efficiency of 8.6 cd / A, maximum power efficiency of 4.1 lm / W, maximum brightness of 6450 cd / sq m, and color coordinate CIE values x=0.15 and y=0.30.

The present invention relates to the technical field of OLED, and provides a light emitting main body material including an adamantane structure and having a structure represented by the formula (I).L1 and L2 are each independently selected from the group consisting mainly of a single bond, phenyl, naphthyl, and the like; electron donor D is mainly selected from that group consisting of carbazolegroup and derivatives thereof, diphenylamino groups and derivatives thereof, acridine group and derivatives thereof; electron acceptor A is mainly selected from nitrogen-containing heterocyclic substituents, cyano-containing substituent, and triarylboron substituents. D-(Pi)-sigma-(Pi)-A structure in the compound of the invention has bipolarity, and the intermediate sigma bond can effectively interrupt the charge transfer between electron donor D and electron acceptor A, so that the excited state is limited to the local excited state in the fragment of electron donor D or electron acceptor A,thus the compound has a small excited state dipole moment. When it is used as the main material of the light emitting layer of the OLED device, the efficiency roll-off of the blue light material canbe effectively reduced, and the luminous brightness and the luminous efficiency can be improved.

The invention relates to a phenanthroimidazole symmetric derivative host material. The structure of the host material is represented by formula I, and can be used to form an organic electroluminescent device with the advantages of high luminescence efficiency, low driving voltage, long life, high brightness and high color purity. In the formula I, R1 and R2 are respectively independently selected from the hydrogen atom, substituted or unsubstituted C1-C30 alkyl groups, C1-C30 cycloalkyl groups, C1-C30 saturated alkyl groups, substituted or unsubstituted C1-C30 alkyloxy groups, substituted or unsubstituted C6-C30 aryl groups, substituted or unsubstituted C6-C30 aryloxy groups, substituted or unsubstituted C6-C30 arylamino groups, substituted or unsubstituted C2-C30 heterocyclic groups, substituted or unsubstituted C6-C30 fused polycyclic groups, hydroxy groups, cyan groups or substituted or unsubstituted amino groups.

The invention discloses an azaxanthone compound and applications of the azaxanthone compound in organic electroluminescent devices. According to the present invention, the azaxanthone compound uses azaxanthone as the core, the molecules are not easily crystallized and are not easily aggregated, and the azaxanthone compound has good film forming property; and with the application of the azaxanthone compound as the light emitting layer main material of the OLED light emitting device, the current efficiency, the power efficiency and the external quantum efficiency of the device are greatly improved, and the service life of the device can be remarkably improved.

The invention discloses bi(trimethylphenyl) boron derivatives. The derivatives are compounds with a structure show in a formula I; the formula I is as shown in the specification; the compounds shown in the formula I can emit efficient blue fluorescence, and also have high triplet level; green and red phosphor doped materials also can be sensitized when the efficient blue fluorescence is emitted; therefore, the technological conditions of preparation of white organic light-emitting diodes (WOLEDs) are met. Meanwhile, the invention also discloses a preparation method of the compounds shown in the formula I and application thereof in preparation of the white organic light-emitting diodes.

The invention discloses a terpyridyl derivative. The derivative has a structure shown as a formula I which is as shown in the specification. The terpyridyl derivative having a structure shown as the formula I is taken as an organic electroluminescent material which efficiently emits blue fluorescent light and is high in color purity, fluorescent quantum yield, electroluminescence efficiency, film-forming property and thermal stability, easy to modify, and various in structural forms. A light-emitting material made of the material can be taken as a main body material of sensitized phosphorescent molecules. A white light device made of the material is simpler in structure, simpler in manufacturing process, and lower in cost.

The invention belongs to the technical field of organic electroluminescent display, and particularly relates to coumarin derivates, a preparation method thereof and application thereof in a white-light organic electroluminescent device. The coumarin derivates are in any one structure as disclosed in the specification. The coumarin derivate materials provided by the invention can efficiently emit blue fluorescence, and have high color purity, high fluorescence quantum yield, high electroluminescence efficiency and favorable film-forming performance; and the synthesis and purification method ofthe coumarin derivate materials is simple and suitable for mass production. The coumarin derivate materials provided by the invention have a high triplet-state energy level (higher than 2.4eV), and can simultaneously sensitize green and red phosphorescent doped materials. The coumarin derivate materials provided by the invention can be used as main materials in illuminant materials and / or luminescent layers in the organic electroluminescent device and used for preparing the organic electroluminescent device.

The invention discloses a compound taking a triarylamine structure as a core as well as a preparation method and application of the compound. The structure of the compound is shown as a general formula (1). The compound provided by the invention has relatively high glass transition temperature and molecular thermal stability, proper HOMO and LUMO energy levels and relatively high mobility, and caneffectively improve the photoelectric property of an OLED device and prolong the service life of the OLED device by optimizing the structure of the device.

The invention belongs to the field of organic electroluminescent materials, and discloses a benzanthracene fluorenyl blue-light phosphorescent host material, a preparing method thereof and applications of the material. The structure formula of the material is shown in the specification. In the material, carbazole is a N-heteroaromatic structure and is an excellent hole transporting unit; and anthracene has a high fluorescence quantum yield, thus largely improving the triplet state energy level of the material and effectively preventing energy from being returned to the host material in a luminescent process, so that the light efficiency is increased.

The invention relates to a fluorescent blue light guest material and its preparation method and use and especially relates to a triphenyl phosphorus oxide-based thermal excitation delayed fluorescent blue light guest material and its preparation method and use. The triphenyl phosphorus oxide-based thermal excitation delayed fluorescent blue light guest material solves the problem that because of large difference of an electron donor and an acceptor, when the electron donor is increased, guest emission wavelength produces red shift so that stable and efficient blue guest luminescence cannot be realized. The blue light guest material has a structural formula shown in the description. The preparation method comprises 1, preparing PXZPhBr, PXZPhBr, PTZPhBr and DMACPhBr, 2, mixing the products obtained through the step 1 and tetrahydrofuran, adding n-butyllithium and diphenylphosphinous chloride into the mixture, adding hydrogen peroxide into the mixture, carrying out stirring and carrying out chromatography and recrystallization. The triphenyl phosphorus oxide-based thermal excitation delayed fluorescent blue light guest material is used for preparation of a thermal excitation delayed fluorescent electroluminescent device. The material utilizes short-axis modification strategy, effectively keeps a matrix triplet state energy level, has a donor-acceptor (D-A)-type molecular structure and balances carrier injection and transmission. The preparation method belongs to the field of fluorescent material preparation.

The invention provides a 6-mesitylene-6H-6-boron hetero benzo[cd]pyrene derivative containing substituted or non-substituted carbazolyl. Due to the bipolar transmission characteristic, the derivative can effectively balance transmission of carriers and improve transmission efficiency, by using the derivative in phosphorescent organic light-emitting devices as a main material. The invention also provides an organic electroluminescent device that has increased current efficiency, reduced turn-on voltage and good stability, and solves the problems of low transmission efficiency or poor stability of phosphorescent organic light-emitting main materials in the prior art.

A 9,9'- connected host material based on a 4,4'-difluorene structure and an application thereof. The invention discloses a host material which has high triplet state and HOMO energy level and has excellent performance. According to the host material, 4,4'- connected difluorene structure is used as a molecular skeleton, and a substituent group is connected at 9,9'- site. Diphenylamine element Dn with hole transport performance can be connected, and An element with electron-transport performance also can be connected, wherein the An element contains an oxygen-phosphorus element and a sulfur-oxygen element; and in addition to the oxygen-phosphorus element and the sulfur-oxygen element, a special spiral structure also can be formed. A synthetic method of the host material is simple and practicable, and the host material is suitable for wide application. An organic electroluminescence blue phosphorescent luminescent device made of the host material has high efficiency, high brightness, low extinction efficiency and electroluminescence performance of low starting voltage, and can widely be applied in the field of organic electroluminescence.

The invention discloses a multifunctional modified dibenzofuran-based phosphineoxy compound and a preparation method and an application thereof, which relate to a functional compound and a preparation method and an application thereof, and are used for solving the problem of slightly high starting voltage of a device since a high triplet state energy level and high current carrier injection / transmission capability cannot coexist. The multifunctional modified dibenzofuran-based phosphineoxy compound designed by the invention is a derivative of a compound of which the chemical name is 4,6-di(diphenyl phosphineoxy)dibenzofuran. The structural formula of the multifunctional modified dibenzofuran-based phosphineoxy compound is shown in the specifications. The preparation method comprises the following steps of: I, preparing a 4,6-di(diphenyl phosphineoxy)dibenzofuran bromation product; and II, preparing a multifunctional modified dibenzofuran-based phosphineoxy compound. The multifunctional modified dibenzofuran-based phosphineoxy compound is applied to preparation of an organic light-emitting device. The multifunctional modified dibenzofuran-based phosphineoxy compound is applied to efficient portable display terminals and illuminating equipment.

The invention relates to a bipolar body organic electroluminescent material. The formula of the bipolar body organic electroluminescent material is as shown in formula (1), wherein X is optional one of O, S and CMe2; R1 and R2 are identical or different, and R1 and R2 are independently selected from C1-C10 aliphatic linear chain or branch chain alkyl containing substituent group or unsubstituted group, C6-C30 aryl containing substituent group or unsubstituted group and C3-C30 heteroatom-containing aryl containing substituent group or unsubstituted group; R3-R10 are independently selected from hydrogen atom, C1-C10 aliphatic linear chain or branch chain alkyl and C6-C30 aryl containing substituent group or unsubstituted group, or the two adjacent groups of the R3-R10 are connected into a ring. The bipolar body organic electroluminescent material which can be used as the blue light and green light body material is good in thermodynamic stability, good in film forming performance, appropriate in triplet state energy level, and the like.

The invention discloses a multifunctional modified dibenzofuran-based di-phosphineoxy compound and a preparation method and an application thereof, which relate to a luminescent layer main body material in an electron phosphorescent device and a preparation method and an application thereof, and are used for solving the problem of high starting voltage during application of an electron phosphorescent device main body material prepared by using the conventional method since a high triple state energy level and high current carrier injection transport capability cannot be realized simultaneously. The preparation method of the multifunctional modified dibenzofuran-based di-phosphineoxy compound comprises the following steps of: I, performing a bromination reaction, and performing extraction, drying, spinning drying and column chromatography in sequence; and II, performing a substitution reaction, and performing extraction, drying, spinning drying and column chromatography in sequence. The multifunctional modified dibenzofuran-based di-phosphineoxy compound is applied as a luminescent layer main body material in an electron phosphorous device. The method is mainly used for preparing a multifunctional modified dibenzofuran-based di-phosphineoxy compound.

The invention provides a luminous composition, which comprises at least one main body material and at least one object material, wherein the main body material has a structure shown as a general formula (I); the object material has a structure shown as a general formula (II); the formula (I) and the formula (II) are shown in the description; the main body material comprises a bridge connection triphenylamine plane capable of acting with the object material and a substitutional group forming a bowl-shaped structure with the plane, so that the mutual effect between the main body and the object can be achieved under the condition of avoiding the interference of other substances; the main body material has high triplet state energy stage; high energy transmission efficiency is shown between the main body and the object.

The present invention discloses a transition metal complex having carbene ligands. The disclosed transition metal complex has a structure of a center transition metal surrounded by two identical carbene ligands and one double-chilating ligand which is a nitrogen-contain heteroaryl group compound with pyridyl group. The disclosed transition metal complex can be represented by the following formula:

The invention relates to a photoelectric function material with a N-P=S resonant structure, a preparation method and application. The structure of the material is shown as a formula (I) in the specification, and in the formula (I), Ar represents carbazole or t-butyl carbazole, and Ph is phenyl. The photoelectric function material, which possesses the N-P=S resonant structure, dynamically-adjustable electricity performances, high triplet state energy level and bipolar transmission property, has the advantages of cheap raw materials, simple and convenient synthetic method, and good dissolvability, film-forming ability and stability. By introducing the N-P=S resonant structure, the material is obviously improved in carrier transmission capability and is endowed with excellent cavity transmission and electron transmission capability. Electroluminescent devices prepared from the material have high efficiency, relatively low turn-on voltage and stable electroluminescent performances. The technical scheme has important meaning on development of efficient stable organic light-emitting diodes.

The invention discloses a compound containing a spirofluorene structure, and applications in organic electroluminescent devices. According to the present invention, the compound has strong rigidity due the spirofluorene structure; the compound has characteristics of less intermolecular crystallization, less aggregation, good film forming property and the like after the compound is linked to a carbazole derivative long branch chain structure; the mother nucleus of the compound has bipolarity, the branch chain is the electron donating group, and the electron donating abilities of the branch chain groups are different, such that the material has different HOMO energy levels so as to be used as different function layer materials; the compound has high triplet energy level so as to effectivelyblock energy loss and easily achieve energy transfer; and with the application of the compound as the organic electroluminescent function layer material in OLED devices, the current efficiency, the power efficiency and the external quantum efficiency of the device are greatly improved, and the service life of the device is significantly prolonged.

The invention provides a nitrogen-containing fused-heterocyclic compound and a preparation method thereof and relates to the field of OLED (organic light emitting diode) materials. The structural formula of the compound is shown in the description, in the formula, R1, R2 and R3 are independently selected from hydrogen, heavy hydrogen, cyanogroup, halogen atoms, substituted or unsubstituted C1-C20straight-chain or branched alkyl, substituted or unsubstituted C6-C30 aromatic hydrocarbons and substituted or unsubstituted C5-C30 heterocyclic aromatic hydrocarbons. After being applied to an OLED device, the compound provided by the invention is capable of effectively increasing the utilization rate of excitons, reducing the voltage of the device, improving the current efficiency of the deviceand prolonging the service life of the device. The compound provided by the invention has a good application effect in OLED light-emitting devices and has a good industrial prospect. In addition, thecompound is simple in preparation method and possible in large-scale industrial production.

An electroluminescent device comprising:—a first electrode for injection of positive charge carriers;—a second electrode for injection of negative charge carriers; and—an electroluminescent layer located between the first and second electrodes comprising a host material and a metal complex, wherein the host material comprises a polymer having a first repeat unit of formula (I): wherein each Ar is the same or different and independently represents an optionally substituted aryl or heteroaryl and any two Ar groups may be directly linked by a single bond.

The invention discloses a luminescent material with a spirofluorene benzyl unit. 9,9'-spirobifluorene molecules are taken as a main body to prepare a series of luminescent materials (see general formula I) by connection with different substituent groups. The compound provided by the invention has the characteristics of high glass transition temperature, high triplet state energy level, high quantum efficiency and the like, and can be applied to organic electroluminescent LEDs to serve as a luminescent material. Moreover, raw materials are easily available, the preparation is simple and convenient, the overall yield is high, and the cost of the luminescent material is greatly reduced.

The invention discloses a heterocompound organic material containing pyridine and metadiazine as well as a preparation method and an application of the heterocompound organic material. According to the preparation method of the material, the metadiazine is used as a core, and phenyl and pyridine are introduced on the periphery through selective palladium catalysis Suzuki coupling reaction, so the goal of regulating and controlling the material molecule rail energy stage is reached. The material has the electron transmission capability, simultaneously has the hole and exciton blocking capability and can be applied to organic electroluminescent diode electron transmission layers.

The invention belongs to the technical field of organic electroluminescent display, and particularly relates to a novel SO2-containing polyheterocyclic compound and application thereof in an organic electroluminescent device. The structure of the novel SO2-containing polyheterocyclic compound provided by the invention is shown as formula (I). The compound has good thermal stability, and when the compound is applied to an OLED device and used as a green light host material, the photoelectric properties of the device can be effectively improved. The OLED device of the SO2-containing polyheterocyclic compound can be applied to the field of display or illumination.

The invention provides an organic compound, an organic electroluminescent material and application thereof, the organic compound has a structure as shown in a formula I, has a high triplet state energy level and a suitable HOMO / LUMO energy level through mutual cooperation of a skeleton structure and substituent groups, and can effectively improve equilibrium migration of current carriers and expand an exciton recombination region; meanwhile, the skeleton structure containing the spiro ring can prevent material stacking and crystallization, so that the organic compound has higher glass transition temperature and molecular thermal stability, and the luminous efficiency and the service life of the device are further improved. The organic compound serving as an electroluminescent material can be applied to a luminescent layer, an electron blocking layer or an optical auxiliary layer of an OLED device, the luminous efficiency of the device can be remarkably improved, the working voltage and energy consumption of the device are reduced, and the service life of the device is prolonged.