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35 results about "Singlet exciton" patented technology
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Organic electroluminescent element
InactiveUS20050164032A1Solve low luminous efficiencyHigh luminous efficiencyDischarge tube luminescnet screensElectroluminescent light sourcesSimple Organic CompoundsLuminous intensity
An organic electroluminescent element including: a pair of electrodes and one or more organic compound layers including a luminous layer, the one or more organic compound layers being disposed between the pair of electrodes. The luminous layer includes at least one compound that emits fluorescent light when voltage is applied, the one or more organic compound layers include a compound having a function of amplifying the number of singlet excitons generated when voltage is applied so as to amplify luminous intensity of the fluorescent light emitted from the compound that emits fluorescent light, and the luminous layer includes at least one noncomplex compound represented by the following formula (I) as a host material: where L1 represents a connecting group, Q1 represents a substituent, m1 denotes 0 or 1, n1 denotes an integer of 1 or more, and a plurality of Q1s may be the same or different.
Owner:UDC IRELAND +1
Organic electroluminescent device
ActiveUS20050142383A1Increase brightnessIncreased durabilityDischarge tube luminescnet screensElectroluminescent light sourcesOxygenFluorescent light
An organic electroluminescent device comprising two electrodes and at least one organic compound layer disposed between the electrodes, wherein a luminescent layer is included in the organic compound layers, the luminescent layer includes a fluorescent compound, at least one of the organic compound layers comprises an amplifying agent, the fluorescent compound emits fluorescent light upon application of voltage, the amplifying agent is capable of amplifying a number of singlet excitons and of amplifying luminescence intensity, and an amount of the amplifying agent is such an amount that at least 51% of light components emitted by the device upon the application of voltage is fluorescent light, wherein the fluorescent compound is selected from the group consisting of a distyryl arylene derivative, an oligoarylene derivative, an nitrogen-containing aromatic heterocyclic compound, a sulfur-containing heterocyclic compound, a metal complex, an oxo-substituted heterocyclic compound, an organosilicon compound and a triaryl amine derivative.
Owner:UDC IRELAND +1
Quantum dot electroluminescent device
ActiveCN106997927AImprove current efficiencyImprove utilization efficiencySolid-state devicesSemiconductor/solid-state device manufacturingEnergy transferPower flow
The invention discloses a quantum dot electroluminescent device, which comprises a light emitting layer. The light emitting layer comprises a quantum dot material and a thermally-activated delayed fluorescence (TADF) material; and after the luminescent spectrum of the thermally-activated delayed fluorescence material and the absorption spectrum of the quantum dot material are subjected to normalization, the difference of wavelengths corresponding to wave crests is within 50 nm. The TADF material in the light emitting layer of the quantum dot electroluminescent device can effectively convert triplet excitons to singlet excitons, the singlet excitons are then transmitted to quantum dots through Forster fluorescence resonance energy transfer, the quantum dots are excited to emit light, and the current efficiency of the quantum dot electroluminescent device is thus improved.
Owner:KUNSHAN NEW FLAT PANEL DISPLAY TECH CENT +1
Organic electroluminescent element
InactiveUS20050158582A1Solve low luminous efficiencyIncrease brightnessDischarge tube luminescnet screensElectroluminescent light sourcesSimple Organic CompoundsLuminous intensity
The present invention relates to an organic electroluminescent element having a pair of electrodes, and at least one organic compound layer including a luminescent layer between the pair of electrodes. The luminescent layer contains a fluorescent, which emits fluorescent light when voltage is applied to the element, a sensitizer for amplifying the number of singlet excitons that occur when voltage is applied to the element so as to amplify the luminous intensity of the fluorescent, and other materials.
Owner:FUJIFILM HLDG CORP +1
Organic electroluminescent device
ActiveUS20060192482A1Increase light intensityHigh strengthDischarge tube luminescnet screensElectroluminescent light sourcesIridiumRhenium
An organic electroluminescent device having at least one organic layer containing a light-emitting layer between a pair of electrodes, wherein the organic electroluminescent device contains a compound emitting fluorescence at a time that voltage is applied, and the light emission at the time that voltage is applied is mainly derived from the light emission of a fluorescent compound, and the external quantum efficiency of the device is 6% or more. It is preferable that the organic electroluminescent device contain an amplifying agent performing the function of amplifying the number of singlet excitons generated at the time that voltage is applied, thus amplifying the intensity of the light emission. The amplifying agent is a transition metal complex, in particular, an iridium complex, a platinum complex, a rhenium complex, a ruthenium complex, a palladium complex, a rhodium complex, a copper complex or a rare earth device complex. The compound emitting fluorescence is preferably a fused aromatic compound.
Owner:UDC IRELAND
Organic electroluminescent device capable of forming spin-polarized injection
InactiveCN101661995AImprove luminous efficiencyAchieve spin regulationSolid-state devicesSemiconductor/solid-state device manufacturingElectronic transmissionHole transport layer
The invention belongs to the technical field of organic electroluminescence and particularly relates to an organic electroluminescent device capable of forming spin-polarized injection by introducingtransition metal oxides. The structure of the device comprises an anode, an organic function layer and a cathode, wherein the organic function layer is a cavity injection layer or a cavity transmission layer, a luminescent layer and an electronic transmission layer; the cavity injection layer or the cavity transmission layer is partly doped; the doped material is Fe3O4; the volume ratio of the doped material and the main material is 1:4-2:1; alternatively, the structure of the device comprises a substrate, an anode, an anode cushioning layer Fe3O4, a luminescent layer, a cavity blocking layerand a cathode. The device can form spin-polarized injection under the action of an external magnetic field. The cavity injected from the anode is spin-polarized when passing the anode cushioning layeror the doped layer, the spin regulation on the carrier is realized, and the proportion of singlet exciton formed in the device is increased, so that the luminescent brightness and current efficiencyof the device are obviously improved.
Owner:JILIN UNIV
Novel 1,8-naphthalimide derivative compound organic electroluminescent main material and device
InactiveCN103992305ALong fluorescence lifetimeFluorescence enhancementOrganic chemistrySolid-state devicesQuantum yieldCompound organic
The invention discloses a series of novel 1,8-naphthalimide derivative compounds with triplet state fusion delayed fluorescence (TFDF) properties, and a preparation method and application thereof to electroluminescent devices. The molecules are used as the organic electroluminescent main materials, and can be prepared into high-efficiency yellow, orange and red organic light-emitting diodes; and the utilization rate of the exciton can substantially exceed the theory limit of singlet exciton utilization rate (25%, namely the external quantum yield of 5%). Therefore, the materials are promising main materials with TFDF properties, and the design and synthesis of the materials have important theoretical and practical significance to increase luminous efficiency of electroluminescence devices and promote the industrialization process of the electroluminescence devices.
Owner:SICHUAN UNIV
Hybrid white light organic electroluminescence device
InactiveCN105591035ASimple structureImprove efficiencySolid-state devicesSemiconductor/solid-state device manufacturingTriplet stateOrganic electroluminescence
A hybrid white light organic electroluminescence device comprises a base plate, an anode, a cathode and an organic functional layer, wherein the organic functional layer is arranged between the anode and the cathode and provided with at least one blue fluorescent layer, at least one phosphorescence light emitting layer which forms a complementary color of the blue light, and at least one charge generation layer; the device also comprises at least one group of a spacer structure wherein the blue fluorescent layer and the phosphorescence light emitting layer are spaced by a charge generation layer; the triplet state energy level of at least one of the blue fluorescent layers is higher than the triplet state energy level of at least one of the phosphorescence light emitting layers. According to the hybrid white light organic electroluminescence device, the triplet state energy level of the blue fluorescent layers is higher than the triplet state energy level of the phosphorescence light emitting layers; singlet excitons and triplet excitons of the device can be effectively used; and the charge generation layer spacing design is adopted so that the hybrid white light organic electroluminescence device has advantages such as high efficiency, long service life, and good stability.
Owner:GUANG ZHOU NEW VISION OPTO ELECTRONICS TECH
Single white light polymer and organic light-emitting material, and organic light-emitting device and preparation method of organic light-emitting device
ActiveCN107118334AImprove efficiencyGood optical performanceSolid-state devicesSemiconductor/solid-state device manufacturingFluorescenceOrganic light emitting device
The invention relates to the field of photoelectric technological materials, and specifically relates to a single white light polymer and an organic light-emitting material, and an organic light-emitting device and a preparation method of the organic light-emitting device. The single white light polymer is capable of emitting blue and orange thermal activation delayed fluorescence at the same time. The organic light-emitting material is capable of realizing the situation of upwards converting triplet excitons into singlet excitons, triplet exciton quenching caused by concentration in an emission layer is reduced.
Owner:YANCHENG INST OF TECH
Luminescent material with thermotropic delayed fluorescence, application of luminescent material and electroluminescent device
InactiveCN108203403AAdjustable light colorReduced efficiency roll-offOrganic chemistrySolid-state devicesElectricityFluorescence
The invention belongs to the fields of preparation and application sciences of organic photoelectric materials and specifically relates to a luminescent material with thermotropic delayed fluorescence, an application of the luminescent material and an electroluminescent device. The luminescent material with thermotropic delayed fluorescence, provided by the invention takes a carbazole derivative as a donor group, and a relatively small tripletenergy gap is achieved by molecular distortion, so that the reverse intersystem crossing from triplet excisions to singlet excisions is realized, and theutilization ratio of the excisions and the efficiency of the device are increased. By taking the luminescent material with thermotropic delayed fluorescence, provided by the invention, as a main luminescent material, the efficiency roll-off of the device can be reduced; and serving as an object luminescent material, the luminescent material with thermotropic delayed fluorescence is high in luminescent layer brightness, good in stability, high in luminescent efficiency and long in service life. If the luminescent material with thermotropic delayed fluorescence is used as an organic luminescentmedium, the device is reduced in efficiency roll-off, high in luminescent efficiency and long in service life.
Owner:WUHAN SUNSHINE OPTOELECTRONICS TECH CO LTD
Organic light-emitting device
ActiveCN106920883APrevent proliferationBlu-ray components are not easy to appearSolid-state devicesSemiconductor/solid-state device manufacturingGreen-lightBlocking layer
Owner:KUNSHAN NEW FLAT PANEL DISPLAY TECH CENT
Electroluminescent device
ActiveCN108365112AImprove luminous efficiencySolid-state devicesSemiconductor/solid-state device manufacturingElectron donorResonance
The invention discloses an electroluminescent device which comprises a substrate, an anode, a cavity transmission layer, an electron donor layer, an electron acceptor layer, an inorganic luminescent layer, an electron transmission layer and a cathode successively, and an organic electron donor molecule carried by the electron donor layer and an organic electron acceptor molecule carried by the electron acceptor layer form an interface exciplex. The electron donor layer and electron acceptor layer are additionally arranged to form the interface exciplex as the main body, triplet-state excitonsof the interface exciplex can be converted into singlet excitons via reverse intersystem crossing, and the singlet excitons are sensitized into the inorganic luminescent layer as an object via a fluorescence resonance energy transduction manner to emit light, and the light emitting efficiency can be improved.
Owner:BEIJING VISIONOX TECH
Organic electroluminescent device
ActiveUS20070122651A1Improve the level ofDischarge tube luminescnet screensLamp detailsLuminous intensityFluorescent light
The organic electroluminescent device of the present invention has at least one organic compound layer containing a light-emitting layer between an anode and a cathode. The organic compound layer contains a fluorescent light-emitting compound emitting fluorescence at a time that voltage is applied and an amplifying agent. A phosphorescent light-emitting maximum wavelength of the amplifying agent is 500 nm or less, and the light emission at a time that voltage is applied is derived mainly from light emission of a fluorescent compound. In order to amplify intensity of emission at a time that voltage is applied It is preferable that the amplifying agent be capable of amplifying the number of singlet excitons generated at a time that voltage is applied.
Owner:UDC IRELAND
Quantum dot ink and preparation method thereof
InactiveCN109705667AImprove current efficiencySolid-state devicesSemiconductor/solid-state device manufacturingEnergy transferElectron donor
The invention relates to quantum dot ink which comprises the following raw materials in percentage by weight: 65%-94% of a polar solvent, 5%-15% of a quantum dot material and 1%-20% of a receptor material; the acceptor material is used for forming a shock-based compound. After the quantum dot ink is adopted to prepare a light-emitting layer, the acceptor material in the light-emitting layer can bein contact with a donor material of adjacent other functional layers so as to form an intermolecular electron donor, namely the shock-based compound, triplet state excitons can be effectively converted into singlet excitons, the singlet excitons are transferred to quantum dots through forester fluorescent resonance energy transfer, the quantum dots are excited to emit light, and the current efficiency of a device is improved.
Owner:GUANGDONG JUHUA PRINTING DISPLAY TECH CO LTD
D-A-type polymer containing S,S-dioxy-dibenzothiophene in main chain as well as preparation method and application thereof
ActiveCN107759774AReduce the effective conjugate lengthFacilitate reverse intersystem crossing processSolid-state devicesSemiconductor/solid-state device manufacturingSolubilityPolymer science
The invention discloses a D-A-type polymer containing S,S-dioxy-dibenzothiophene in a main chain as well as a preparation method and application thereof. An electricity-absorbing S,S-dioxy-dibenzothiophene unit and a power supply unit are adopted to copolymerize to form a D-A structure molecule, and obtain the D-A-type polymer containing S,S-dioxy-dibenzothiophene in the main chain. The 2,8-carbonatoms of the S,S-dioxy-dibenzothiophene unit are connected with a nitrogen-containing aromatic heterocyclic unit of the power supply through a C-N bond, and a twist angle of a D-A unit is larger andis beneficial to reduce degree of conjugation of polymer molecules, effective separation of HOMO and LUMO electron clouds is achieved, singlet state-triplet state energy level difference is reduced, promotion of intermolecular inversion intersystem crossing is improved, and ratio of singlet exciton generation is increased, and device efficiency is improved. The D-A-type polymer containing S,S-dioxy-dibenzothiophene in the main chain has good solubility and can be used for preparing a light emitting layer of a polymer light emitting diode.
Owner:东莞伏安光电科技有限公司
Free radical doublet sensitized fluorescent organic light-emitting device
ActiveCN107331783AAvoid formingSolid-state devicesSemiconductor/solid-state device manufacturingFluorescenceGround state
The invention discloses a free radical doublet sensitized fluorescent organic light-emitting device, which belongs to the technical field of organic light-emitting devices. The light-emitting layer of the device is a mixture of an organic light-emitting free radical molecular material and a non essential parent material, and a guest material is a fluorescent molecular light-emitting material; the organic light-emitting free radical molecular material and the fluorescent molecular light-emitting material together form a free radical doublet sensitized system, an energy donor is organic light-emitting free radicals and an energy receptor is fluorescent luminescent molecules. The excitation state of the organic light-emitting free radical molecules is the doublet, spin forbidden limitations do not exist in the case of transition to a ground state, the organic light-emitting free radicals serve as the main material of the light-emitting layer, through Forster energy transfer, guest fluorescent molecules can generate light-emitting singlet excitons, a fluorescent luminescent device with an internal quantum efficiency upper limit to be 100% is obtained, and thus, a new way to improve the internal quantum efficiency of the traditional fluorescent molecules is provided.
Owner:JILIN UNIV
Luminescent Device
InactiveUS20180309069A1Improve performance and efficiencyHigh densityPalladium organic compoundsSolid-state devicesHigh energyFluorescence
The disclosure relates to organic luminescence technology, in particular to a luminescent device having a first electrode, a second electrode and at least an organic luminescent layer arranged between the first electrode and the second electrode. The organic luminescent layer contains host material, metal-assisted delayed fluorescence sensitizer and fluorescence quenching agent; the metal-assisted delayed fluorescence sensitizer is an organic material which transfers a triplet exciton and a singlet exciton produced by electroluminescence to the fluorescence quenching agent; the fluorescence quenching agent is a fluorescent luminescent material which transfers the energy of all the triplet exciton to the singlet exciton and uses the singlet exciton for luminescence. The luminescent device in the invention has a very high energy utilization rate through the management of exciton in the organic luminescent layer, and significantly improves the luminescent efficiency and service life of the luminescent device.
Owner:AAC TECH PTE LTD
1,3,5-triazine derivative, and organic electroluminescent device produced by using same
InactiveCN109836426AIncrease distanceIncreased Radiation Transition RateOrganic chemistrySolid-state devicesTriazine derivativeQuenching
The present invention discloses a 1,3,5-triazine derivative having a structure represented by formula I. A spacing unit introduced between the triazinyl group, used as an electron acceptor, and the electron-donating group of the 1,3,5-triazine derivative makes an organic electroluminescent material have a small deltaEST and a high radiation transition rate. The invention also discloses an organicelectroluminescent device. At least one functional layer contains the 1,3,5-triazine derivative, and 1,3,5-triazine derivative has the small deltaEST and the high radiation transition rate as a dye, so the device has a high luminous efficiency. When the 1,3,5-triazine derivative is used as a host material, the reverse intersystem crossing of triplet excitons of the host material to singlet excitons is enhanced, the Foster energy transfer is enhanced, the quenching of the triplet excitons is reduced, the roll-off of the device is small, the external quantum efficiency is high, and the efficientuse of devices under a high brightness is benefited.
Owner:KUNSHAN GO VISIONOX OPTO ELECTRONICS CO LTD +1
Organic electroluminescent device
ActiveUS7737624B2Increase light intensityHigh strengthDischarge tube luminescnet screensElectroluminescent light sourcesRheniumIridium
Owner:UDC IRELAND
Light-Emitting Element, Light-Emitting Device, Electronic Device, Lighting Device, and Lighting System
ActiveUS20170025621A1Improve efficiencySave energyOrganic chemistrySolid-state devicesEnergy transferFluorescence
Owner:SEMICON ENERGY LAB CO LTD
Organic light-emitting devices using spin-dependent processes
InactiveUS7682707B2Increase ratingsShorten the timeNanoinformaticsConductive materialStimulated emissionSingle crystal
The maximum luminous efficiency of organic light-emitting materials is increased through spin-dependent processing. The technique is applicable to all electro-luminescent processes in which light is produced by singlet exciton decay, and all devices which use such effects, including LEDs, super-radiant devices, amplified stimulated emission devices, lasers, other optical microcavity devices, electrically pumped optical amplifiers, and phosphorescence (Ph) based light emitting devices. In preferred embodiments, the emissive material is doped with an impurity, or otherwise modified, to increase the spin-lattice relaxation rate (i.e., decrease the spin-lattice time), and hence raise the efficiency of the device. The material may be a polymer, oligomer, small molecule, single crystal, molecular crystal, or fullerene. The impurity is preferably a magnetic or paramagnetic substance. The invention is applicable to IR, UV, and other electromagnetic radiation generation and is thus not limited to the visible region of the spectrum. The methods of the invention may also be combined with other techniques used to improve device performance.
Owner:THE UNIV OF UTAH
Organic Compound, Light-Emitting Element, Light-Emitting Device, Electronic Device, and Lighting Device
InactiveUS20180026207A1Valid conversionImprove emission efficiencyOrganic chemistryElectroluminescent light sourcesFluorescenceHost material
To provide a novel fluorescent organic compound (a fluorescent compound). The organic compound is a substance that emits fluorescence and an organic compound (a host material) in which FIA can occur efficiently. In the organic compound, triplet excitons, which do not contribute to light emission, can be efficiently converted into singlet excitons. The use of such an organic compound can increase emission efficiency of a light-emitting element.
Owner:SEMICON ENERGY LAB CO LTD
Organic electroluminescent device
ActiveUS20180358414A1Improve the display effectSimple device structureSolid-state devicesSemiconductor/solid-state device manufacturingGreen-lightBlocking layer
An organic electroluminescent device adopts a TADF material as a first host material (6) of a green light unit (302) to sensitize a green phosphorescent material serving as a first guest material (7). A portion of triplet excitons are converted into singlet excitons through inverse gap crossing, and thus decrease of the triplet exciton concentration results in narrowing of the recombination region, thereby preventing the triplet excitons from diffusing into a blue light layer (4) to emit light, so as to realize a green light spectrum containing no blue light component. And because an energy level difference between red light and blue light is relatively large, carriers in a red light unit cannot be easily transferred to the blue light layer, and therefore it is not easy for a blue light component to appear in a red light spectrum. Accordingly, the light-emitting spectrums of red / green subpixels in the organic electroluminescent device with a shared blue light layer do not contain blue light, thereby effectively broaden the range of applicable combinations of luminescent materials and improving the display performance of the device. Moreover, a hole-blocking layer is not required, and thus the structure of the device is effectively simplified, and the operation voltage is lowered; in the meantime, the process difficulty is reduced, and the product yield is increased, thereby reducing the production cost.
Owner:KUNSHAN NEW FLAT PANEL DISPLAY TECH CENT
OLED device
ActiveCN109449303AImprove luminous efficiencyAlleviate the phenomenon of voltage riseSolid-state devicesSemiconductor/solid-state device manufacturingInfraredCharge carrier mobility
The invention discloses an OLED device. The OLED device comprises a first electrode, an organic functional layer and a reflecting electrode which are sequentially arranged, wherein the organic functional layer comprises at least one infrared light-emitting layer and at least one thermal active delay fluorescent material light-emitting layer. An infrared OLED light-emitting material is combined with a phosphorescent material, a fluorescent material or a thermal active delay fluorescent material, and infrared rays emitted by the infrared light-emitting layer can be used for heating other functional materials, so that the carrier mobility of the organic functional material in a low-temperature environment is improved, the phenomenon of voltage rise of the device is relieved, the stability ofthe device at a low temperature is improved, and an operation voltage is reduced. In addition, the infrared rays emitted by the infrared light-emitting layer are used for heating the thermal active delay fluorescent material to promote more triplet excitons in the thermal active delay fluorescent material to be converted into singlet excitons for emitting light through inverse intersystem crossing, so that the light-emitting efficiency is improved.
Owner:GUAN YEOLIGHT TECH CO LTD
Organic electroluminescence compound and application thereof as well as organic electroluminescence device
ActiveCN108276436AHigh molecular weightRealize the leapSolid-state devicesSemiconductor/solid-state device manufacturingProcessing typeElectron donor
The invention relates to the field of photoelectric materials, and particularly relates to an organic electroluminescence compound and the application thereof as well as an organic electroluminescencedevice. The structural formula of the organic electroluminescence compound is as follows: as shown in the specification, wherein G1, G2, G3, G4, G5 and G6 are independently electron donor groups; D1and D2 are independently electron acceptor groups; R1 and R2 are independently any one of hydrogen, C1-C4 linear alkyl or branched alkyl, cyan or halogen. The compound can be used as a solution processing type thermal activation delay fluorescent material and can realize transition from triplet excitons to singlet excitons, so that the triplet exciton utilization rate is increased; the electron acceptor groups are added in the compound, so that the carrier transport balance is improved; the compound has an enough high molecular weight and can meet a requirement of solution process-based processing.
Owner:湖北顾瑞半导体科技有限公司
Bipolar thermal delayed fluorescence compound, and applications thereof
InactiveCN109705125AImprove luminous efficiencyImprove backlash crossover probabilityOrganic chemistrySolid-state devicesElectronic transmissionElectricity
The invention belongs to the technical field of organic electroluminescent material, and discloses a bipolar thermal delayed fluorescence compound, and applications thereof. When the bipolar thermal delayed fluorescence compound is taken as an organic electroluminescent material, the energy level difference of the singlet state and the triplet state is equal to or lower than 300meV, it is beneficial for increasing of reverse intersystem crossing rate from triplet exciton to singlet exciton; and in addition, when the relatively low delta EST of the bipolar thermal delayed fluorescence compoundis maintained, extremely matching cavity-electron transmissibility is achieved, and the property is beneficial for improvement of material luminescence efficiency and device stability.
Owner:AAC TECH NANJING
Organic electroluminescent element
ActiveUS8941102B2Good colorSolution to short lifeSolid-state devicesSemiconductor/solid-state device manufacturingColor rendering indexHigh color
The organic electroluminescent element which is designed to emit white light in a range of a low color temperature to a high color temperature that is important for an illumination light source with a minor design change, and, moreover, has high color rendering property especially in an average color rendering index Ra and a special color rendering index R9 for red, while being highly efficient and long-life is obtained. The organic electroluminescent element includes: a transparent electrode; a first light-emitting unit including blue and green fluorescent light-emitting layers; an intermediate layer; a second light-emitting unit including red and green phosphorescent light-emitting layers; and a reflecting electrode. The first and second light-emitting units are stacked and the intermediate layer is interposed therebetween. The first light-emitting unit is designed to emit light by use of a phenomenon that a singlet exciton is generated by collision and fusion of two triplet excitons.
Owner:SAMSUNG DISPLAY CO LTD
Malononitrile substituted aryl anthraphenanthrene organic electroluminescent material and its preparation method and application
ActiveCN108586289BHas thermally activated delayed fluorescence propertiesImprove performanceOrganic chemistrySolid-state devicesArylFluorescence
The invention discloses a malononitrile substituted aryl anthraphenanthrene organic electroluminescence material and its preparation method and application. The above organic electroluminescent material uses malononitrile substituted aryl anthraphenanthrene as the mother nucleus, and its structural formula As shown in formula (I). The malononitrile-substituted aryl anthraphenanthrene organic electroluminescent material provided by the invention has a simple preparation process, HOMO and LUMO energy level electron clouds can be effectively separated, and the singlet-triplet energy gap (ΔE ST ) is small, the triplet excitons can be transformed into singlet excitons by reverse intersystem jumping (RIST) to emit light, and have thermally activated delayed fluorescence properties; High device efficiency is obtained when applied to OLED light-emitting devices.
Owner:NORTHWEST UNIV
Organic compound, light-emitting element, light-emitting device, electronic device, and lighting device
InactiveUS10096783B2Valid conversionImprove emission efficiencyOrganic chemistryElectroluminescent light sourcesSimple Organic CompoundsFluorescence
To provide a novel fluorescent organic compound (a fluorescent compound). The organic compound is a substance that emits fluorescence and an organic compound (a host material) in which TTA can occur efficiently. In the organic compound, triplet excitons, which do not contribute to light emission, can be efficiently converted into singlet excitons. The use of such an organic compound can increase emission efficiency of a light-emitting element.
Owner:SEMICON ENERGY LAB CO LTD
Preparation method of ultra-low turn-on voltage deep blue light organic electroluminescent device
PendingCN113809254AReduced structural relaxationSmall steric hindranceSolid-state devicesSemiconductor/solid-state device manufacturingQuantum yieldBoron atom
The invention relates to a preparation method of an ultra-low turn-on voltage deep blue light organic electroluminescent device. According to the invention, a methyl group, a phenyl group and a trimethylphenyl group are introduced to boron atoms on two sides of a BN-Ullazine derivative main body, and a benzyl group is introduced to a nitrogen atom; the material has a relatively wide optical band gap and a relatively high triplet state energy level; the triphenylamine polymer PTAA has the characteristics of high hole mobility, wide forbidden band structure, high fluorescence quantum yield and the like; the mixed light-emitting layer in the device is BN-Ullazine doped PTAA; a fluorescence up-conversion mechanism formed by a triplet-triplet annihilation (TTA) effect of a main body material BN-Ullazine derivative greatly improves the utilization rate of singlet excitons; the BN-Ullazinederivative is matched with the energy level structure of PTAA and has good energy transfer, so that singlet excitons generated by the BN-Ullazine derivative are promoted to be effectively transferred to the excited state energy level of PTAA, and efficient luminescence of PTAA is realized; and the performance of a device taking the BN-Ullazine:PTAA as the light-emitting layer is obviously improved, and the turn-on voltage is lower than the optical band gap energy of the PTAA.
Owner:TIANJIN UNIVERSITY OF TECHNOLOGY
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