44results about How to "High electroluminescent efficiency" patented technology

Carbazolyl-functional linear polysiloxanes containing N-carbazolylalkyl groups and hydrolysable groups, a silicone composition containing a carbazolyl-functional linear polysiloxane, a curd carbazolyl-functional polysiloxane prepared by curing the silicone composition, and an organic light-emitting diode (OLED) containing a carbazolyl-functional polysiloxane.

The invention relates to the field of display technologies, and discloses an organic electroluminescent display panel. The organic electroluminescent display panel comprises a cathode layer, an anodelayer, and at least two light-emitting units which are arranged between the cathode layer and the anode layer and connected in series with each other, wherein a charge generation layer is arranged between the at least one pair of adjacent light-emitting units; the charge generation layer comprises a P-doped layer close to one side of the cathode layer, an N-doped layer close to one side of the anode layer, and an intermediate layer arranged between the P-doped layer and the N-doped layer; and electron mobility of the intermediate layer is greater than electron mobility of host materials of theN-doped layer, and/or, hole mobility of the intermediate is greater than hole mobility of host materials of the P-doped layer. The organic electroluminescent display panel provided by the invention has the advantages of long-term stable driving voltage, low power consumption, long service life and high luminous efficiency.

The invention relates to an organic compound, a mixture and a composition and an application thereof, and in particular, relates to an application in an organic light-emitting diode. The organic compound disclosed by the invention, represented by a general formula (1), has excellent hole transport property and stability, can be used as a hole injection layer material in an organic electroluminescent element, and can also be used as a dopant to be doped in a hole injection layer or a hole transport layer, so that low-voltage driving can be realized, the electroluminescent efficiency can also be improved, and the device life is prolonged.

The invention relates to a highly effective two-tone white light high molecular material and it's preparing method in the field of lighting material technology. The chemical structure of the highly effective two-tone white light high molecular material is as the right type, wherein x=0.00001-0.5. The preparing method is that it uses polymer fluorenes as blue light structure unit, 4, 7-2 (4-(N-phenyl -N-(4-methyl phenyl) amino) phenyl)-2, 1, 3 -benzodithiazole as orange light structure unit, it uses combined polymerization mode to lead the orange light work unit into the blue light macromole fundamental chain by chemical key mode to prepare for the highly effective two-tone white light high molecular material.

The invention relates to a fused ring organic compound and a mixture and organic electronic device comprising the same. The fused ring organic compound shown in a general formula (I) has excellent electron transport properties and stability, material synthesis is simple, and when a synthesized material is applied to a device host material, the luminous efficiency and stability of the device can beimproved, and the production cost of the device can be reduced. In addition, a co-host can be formed through cooperation of the fused ring organic compound with another host with a hole transport property or a bipolar property, the electroluminescent efficiency and the service life of the device can be improved further.

The invention relates to a nitrogen-containing heterocyclic ring substituted cyclopropane compound and application thereof. The compound has a structure shown as a formula (1), shows excellent hole transport property and stability, can be used as a hole injection layer material in an organic electroluminescent element, and can also be used as a doping agent to be doped in a hole injection layer or a hole transport layer, so that the compound can be driven by low voltage, the electroluminescent efficiency can be improved, and the service life of a device can be prolonged.

The invention belongs to the technical field of photoelectric materials and provides an organic semiconductor material, a preparation method and application thereof. The organic semiconductor material has the structural formula as follow. In the organic semiconductor material, trimerization indene is the core and anthracene and benzothiadiazole units are introduced simultaneously. The organic semiconductor material realizes stable light emitting, has excellent resolvability, charge carrier transfer performance and charge balance, and can realize remarkable improvement of electroluminescent efficiency of organic semiconductor material. And the preparation method for the organic semiconductor material is simple to operate, low in cost and applicable to industrialized application.

The invention belongs to the technical field of diodes, and provides a quantum dot light-emitting diode. The quantum dot light-emitting diode comprises an anode, a functional layer and a cathode whichare sequentially laminated. The functional layer comprises a hole injection layer, a hole transmission layer, a quantum dot light-emitting layer and an electron transmission layer which are sequentially laminated, wherein the hole injection layer is in contact with the anode. By means of the hole injection layer, the holes are injected into a hole transport layer from an anode, so that the matching degree of the hole transport layer and the anode material is improved; the holes and electrons are injected from two poles of a diode and reach the quantum dot light-emitting layer after charge transmission; and conduction bands and valence bands of the quantum dots capture the electrons and the holes respectively and emit light in a composite mode; the arrangement of the electron transmissionlayer facilitates the effective injection of electrons into quantum dots from a cathode, and the holes can be prevented from leaking to an adjacent layer, thereby improving the recombination efficiency of charges. Through the arrangement of the functional layer, the luminous efficiency, the brightness and the stability of the quantum dot light emitting diode are improved.

The invention discloses organic optical iridium coordination compounds and application thereof in an organic electro-generated white or orange optical device. The orange optical iridium coordinate compounds have a structural formula as formula 1 or formula 2 which is shown in the specification, wherein R1 can be trifluoromethyl or pentafluoroethyl, R4 can be trifluoromethyl or pentafluoroethyl or R1=R4, R2 is selected from hydrogen, methyl, ethyl and halogen or halogen-substituted methyl or ethyl, R3 is independently selected from hydrogen, methyl, ethyl, halogen or halogen-substituted methyl or ethyl or R2=R3, and the halogen is fluorine, chlorine, bromine or iodine. The invention has the advantages as follows: a fluorine-containing modified iridium coordination compound can be used for effectively lowering vibrating frequency, reducing non-radiative transition and increasing electroluminescence efficiency; a film prepared by using a fluorine atom-containing modified coordination compound has better feature; self-quenching behaviors are restrained by steric hindrance of CF3; and charge transfer balance performance is increased by very good current carrier transmission performance, so that an efficient doped organic electro-generated luminescent device can be manufactured.

The invention relates to an aromatic ring pyrene quinone compound, a polymer and application thereof. The aromatic ring pyrene quinone compound has a structure shown as a formula (I1), shows excellenthole transport property and stability, can be used as a hole injection layer material in an organic electroluminescent element, and can also be doped in a hole injection layer or a hole transport layer as a doping agent, so that a device can be driven at a low voltage, the electroluminescent efficiency can be improved, and the service life of the device can be prolonged.

The invention belongs to the technical field of electroluminescent devices, and discloses an indium phosphide quantum dot electroluminescent device based on tin oxide as an electron injection layer and preparation of the indium phosphide quantum dot electroluminescent device. The indium phosphide quantum dot electroluminescent device comprises an ITO substrate, an electron injection layer, an electron transport layer, an indium phosphide quantum dot luminescent layer, a hole transport layer, a hole injection layer and a metal anode which are stacked in sequence. And the electron injection layer is tin dioxide. The tin dioxide material is used as the electron injection layer of the electroluminescent device, electron injection is optimized, the indium phosphide quantum dot electroluminescent device based on the tin dioxide material as the electron injection layer is prepared by using the high electron mobility of the tin dioxide material, the turn-on voltage of the quantum dot device is reduced, and the light emitting efficiency of the device is improved. The electroluminescent efficiency is improved, the working life is prolonged, and the application of the quantum dot material in the field of next-generation display and illumination is promoted.

The invention provides a red light emitting material based on an aza-beta diketone boron difluoride central core, a preparation method and application thereof, and an organic electroluminescent device, and belongs to the technical field of electroluminescent materials. The red light emitting material based on the aza-beta-diketone boron difluoride central core provided by the invention has high electroluminescent efficiency, and can realize dark red light emitting. In addition, according to the preparation method of the red light material provided by the invention, the initial raw materials are easy to obtain, the reaction conditions are mild, the operation steps are simple, the preparation cost is reduced, the compound has good solubility, 100 mg of compound can be dissolved in per 1 mL of solvent, and the preparation method of the red light material is beneficial to wet-process large-area device preparation and commercial application realization.

The invention provides an interpenetrating polyaniline/carbon nanotube composite nanofiber material preparation method and application. The biggest drawback of a device made from organic polyalkylfluorene as a blue-light emitting material is that when the device works long hours or is heated, long-wavelength luminescence generates at 530-540nm, and the emitting color turns into blue-green from blue, resulting in color purity decline. The method comprises: synthesizing polyaniline by using Suzuki coupling reaction, synthesizing poly[2,7-(9,9-dioctylfluorene)-alternating-N-phenyl-N-(4-phenoxyphenyl)aniline] by using the obtained monomer of N,N-bis(4-bromophenyl)-4-(4-phenoxy)aniline, preparing soluble carbon nanotubes, dissolving the polyaniline and the carbon nanotubes in a solvent, and preparing the interpenetrating polyaniline/carbon nanotube composite nanofiber material by using the high voltage electrospinning technique. The method is used in photoluminescence, electroluminescence and photoelectric conversion materials.