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196 results about "Singlet state" patented technology
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In quantum mechanics, a singlet state usually refers to a system in which all electrons are paired. The term 'singlet' originally meant a linked set of particles whose net angular momentum is zero, that is, whose overall spin quantum number s=0. As a result, there is only one spectral line of a singlet state. In contrast, a doublet state contains one unpaired electron and shows splitting of spectral lines into a doublet; and a triplet state has two unpaired electrons and shows threefold splitting of spectral lines.
Organic electroluminescence device
ActiveUS20120248968A1Emits light efficientlyEffective lightingOrganic chemistryDischarge tube luminescnet screensSimple Organic CompoundsOrganic electroluminescence
An organic EL device includes a pair of electrodes and an organic compound layer between pair of electrodes. The organic compound layer includes an emitting layer including a first material and a second material. The second material is a fluorescent material. Singlet energy EgS(H) of the first material and singlet energy EgS(D) of the second material satisfy a relationship of the following formula (1). The first material satisfies a relationship of the following formula (2) in terms of a difference ΔST(H) between the singlet energy EgS(H) and an energy gap Eg77K(H) at 77K.EgS(H)>EgS(D) (1)ΔST(H)=EgS(H)−Eg77K(H)<0.3 (eV) (2)
Owner:IDEMITSU KOSAN CO LTD
Organic electroluminescent device and display device
ActiveCN109411634AImprove luminous efficiencyImprove stabilitySolid-state devicesSemiconductor/solid-state device manufacturingResonanceFluorescence
The invention provides an organic electroluminescent device and a display device. The organic electroluminescent device comprises an organic luminescent layer; the organic luminescent layer comprisesa main body material, a sensitizing agent material and a resonance thermally activated delayed fluorescence (TADF) material; the main body material is a broad-band gap material; the sensitizing agentmaterial is a thermally activated delayed fluorescence material; a singlet-state energy level of the thermally activated delayed fluorescence material is located between a singlet-state energy level of the broad-band gap material and a singlet-state energy level of the resonance thermally activated delayed fluorescence material; and a triplet-state energy level of the thermally activated delayed fluorescence material is located between a triplet-state energy level of the broad-band gap material and a triplet-state energy level of the resonance thermally activated delayed fluorescence material.With the organic electroluminescent device and the display device, the defects of short life time and wide spectrum of the device caused by a condition that the traditional TADF material is adopted to emit light at the present stage can be overcome.
Owner:KUNSHAN GO VISIONOX OPTO ELECTRONICS CO LTD +1
Organic electroluminescent element
ActiveUS20150280158A1Efficient emissionsHigh current density areaSolid-state devicesSemiconductor/solid-state device manufacturingSimple Organic CompoundsFluorescence
An organic electroluminescence device includes a pair of electrodes and an organic compound layer interposed therebetween. The organic compound layer includes a plurality of emitting layers at least including a first emitting layer and a second emitting layer. The first emitting layer contains a first host material and a fluorescent first luminescent material. The second emitting layer contains a second luminescent material that is different from the first luminescent material. A difference ΔST(H1) between singlet energy EgS(H1) of the first host material and an energy gap Eg77K(H1) at 77[K] of the first host material satisfies a specific relationship. One of the first luminescent material and the second luminescent material has a main peak wavelength from 400 nm to less than 500 nm and the other of the first luminescent material and the second luminescent material has a main peak wavelength from 500 nm to 700 nm.
Owner:IDEMITSU KOSAN CO LTD
OELD (Organic Electroluminescent Device) and preparation method thereof
ActiveCN102709485AImprove luminous efficiencySolid-state devicesSemiconductor/solid-state device manufacturingElectronic transmissionTriplet state
The invention provides a novel OELD (Organic Electroluminescent Device). The novel OELD comprises an anode, a hole transmission layer, a luminous layer, an electronic transmission layer and a cathode which are mutually laminated, wherein the energy level difference between triplet state and singlet state of a main body material of the luminous layer is less than 0.15 eV. The invention also provides a preparation method of the OELD. The OELD provided by the invention has increased luminous efficiency by using the main body material.
Owner:KUNSHAN VISIONOX DISPLAY TECH +2
Copper (i) complexes for optoelectronic devices
ActiveUS20130150581A1Short possible emission decay timeDiminished roll-off behaviorFinal product manufactureGroup 5/15 element organic compoundsSolubilityChlorobenzene
The invention relates to neutral mononuclear copper (I) complexes for emitting light and with a structure according to formula (A) in which: M represents: Cu(I); L∩L represents: a single, negatively charged, bidentate ligand; N∩N represents: a diimine ligand (substituted with R and FG), in particular a substituted 2,2′-bipyridine derivative (bpy) or a substituted 1,10-phenanthroline derivative (phen); R represents: at least one sterically demanding substituent for preventing the planarisation of the complex in the excited state; FG=functional group, and represents: at least one second substituent for increasing solubility in organic solvents. The substituent can also be used for electron transport or alternatively for hole transport, said functional group being bound to the diimine ligands either directly or by means of suitable bridges; and the copper (I) complex: having a ΔE(S1−T1) value of less than 2500 cm−1 between the lowest excited singlet state (S1) and the triplet state (T1) which lies below; having an emission lifespan of at most 20 μs; having an emission quantum yield of greater than 40%, and a solubility of at least 1 g / L in organic solvents, in particular polar organic hydrocarbons such as acetone, methyl ethyl ketone, benzene, toluene, chlorobenzene, dichlorobenzene, dichloromethane, chloroform, dichloroethane, tetrachloroethylene, alcohols, acetonitrile or water.
Owner:SAMSUNG DISPLAY CO LTD
Boron-containing organic light emission diode device and preparation method thereof
ActiveCN107507921AReduced singlet-triplet energy level differenceDelayed fluorescenceSolid-state devicesSemiconductor/solid-state device manufacturingElectron injectionTriplet state
Owner:JIANGSU SUNERA TECH CO LTD
Carbon quantum dots with room-temperature phosphorescence and delayed fluorescence properties, and synthesis and application thereof
ActiveCN105199724AIncrease productionStable room temperature phosphorescenceStampsLuminescent compositionsLone electron pairUltraviolet lights
Owner:BEIJING UNIV OF CHEM TECH
Singlet telescopes with controllable ghosts for laser beam forming
A singlet telescope is provided for reshaping the laser beam to a larger or smaller diameter while maintaining the inherent quality of the beam. Applications for the singlet telescope include intercavity expansion to accommodate the damage thresh-old of various components, expansion of beams to match the size of different wavelengths for final collimation, and shrinking of beams to provide high irradiance for nonlinear processes such as optical parametric oscillation and frequency doubling, with the above applications usually requiring low power magnification or demagnification. Problems involving the utilization of these telescopes over wide temperature ranges and ghost reflections in which a light is reflected back to a pumping laser are minimized with the singlet construction, with the ghost reflections potentially creating damage of components including self-damage or breakdown of air, as well as damage to a Q-switched resonator which causes pre-lasing.
Owner:BAE SYST INFORMATION & ELECTRONICS SYST INTERGRATION INC
Organic electroluminescent element
ActiveUS20150188070A1Large luminous efficiencyReduced luminous efficiencySolid-state devicesSemiconductor/solid-state device manufacturingSimple Organic CompoundsOrganic electroluminescence
An organic EL device includes a pair of electrodes and an organic compound layer between pair of electrodes. The organic compound layer includes an emitting layer including a first material, a second material and a third material, in which singlet energy EgS(H) of the first material, singlet energy EgS(H2) of the second material, and singlet energy EgS(D) of the third material satisfy a specific relationship.
Owner:IDEMITSU KOSAN CO LTD
Fused ring compound as well as preparation method and application thereof
ActiveCN108727398AImprove cavitation performanceIncrease HOMO levelOrganic chemistrySolid-state devicesTriplet stateGlass transition
The invention discloses a fused ring compound comprising a structure shown as a formula (I) or (II). According to the fused ring compound, by controlling effective conjugation of aromatic rings and heterocyclic rings, the electron transport performance is balanced while the hole performance is improved. The compound has high triplet state energy level and glass transition temperature, is difficultin crystallization of material molecules, and is capable of ensuring high-efficiency transfer of energy to a guest material while serving as a host material of a luminous layer. The substituent groupof the fused ring compound is adjusted, the electron and hole transport performances are further improved, the singlet state and triplet state energy level difference is reduced, the compound area ofthe carrier is widened, and triplet state exciton annihilation is avoided. The invention further discloses an organic electroluminescence device. At least one functional layer contains the fused ringcompound, and the fused ring compound serves as the host material of the luminous layer and is matched with the energy level of an adjacent carrier transport layer. The luminous efficiency of the device is improved, and the driving voltage of the device is reduced.
Owner:NINGBO LUMILAN NEW MATERIAL CO LTD
Organic electroluminescence device and preparing method thereof
ActiveCN104716268AAchieve luminous efficiencyNo need to useSolid-state devicesSemiconductor/solid-state device manufacturingFluorescenceHost material
An organic electroluminescent device and a method for manufacture thereof. The body material of the light-emitting layer (06) of the organic electroluminescent device is a material that the triplet state energy level of CT excited state is higher than that of n-πexcited state by 0-0.3 eV; Or, the body material of the light-emitting layer (06) is a material that the triplet state energy level of CT excited state is higher than that of n-πexcited state by more than 1.0 eV, and the difference between the second triplet state energy level of n-π excited state and the first singlet state energy level of CT excited state is -0.1-0.1 eV. A Luminescent dye is a fluorescent dye. The organic electroluminescent device can fully take advantage of the triplet state of the light-emitting layer (06), so the 100% luminescence efficiency of fluorescent device can be obtained, and the use of noble metal is avoided so as to reduce costs.
Owner:BEIJING VISIONOX TECH +1
White Organic Light Emitting Device
ActiveUS20120097998A1Minimize diffusionHigh color temperatureSolid-state devicesSemiconductor/solid-state device manufacturingOrganic light emitting deviceHigh color
A white organic light emitting device which has high color temperature characteristics and no change in color coordinates according to luminance change, includes a first electrode and a second electrode opposite to each other on a substrate, a charge generation layer formed between the first electrode and the second electrode, a second stack including a second light emitting layer formed between the charge generation layer and the second electrode, and a first stack including a first light emitting layer formed between the first electrode and the charge generation layer, wherein the first emitting layer has low singlet-triplet exchange energy to change triplet excitons into a singlet state by triplet-triplet annihilation and a dopant concentration of the first light emitting layer is adjusted according to a luminance change curve of the second stack.
Owner:LG DISPLAY CO LTD
Organic electroluminescent device and preparation method and display device thereof
ActiveCN109411633AImprove stabilityIncrease profitSolid-state devicesSemiconductor/solid-state device manufacturingHigh energyDisplay device
The invention provides an organic electroluminescent device and a preparation method and a display device thereof. The organic electroluminescent device comprises a luminescent layer; the luminescentlayer comprises a host material and a dye; the host material is a triplet-triplet annihilation material; the dye comprises a thermally activated delayed fluorescent material; the singlet state energylevel of the triplet-triplet annihilation material is greater than the singlet state energy level of the thermally activated delayed fluorescent material; and the triplet state energy level of the triplet-triplet annihilation material is less than the triplet state energy level of the thermally activated delayed fluorescent material. According to the organic electroluminescent device provided by the invention, the defect that the service life of the device is short due to high-energy excitons in the device at the present stage can be overcome.
Owner:KUNSHAN GO VISIONOX OPTO ELECTRONICS CO LTD +1
Organic light-emitting device
ActiveCN106920884AIncreased maximum theoretical external quantum efficiencyEasy transferSolid-state devicesSemiconductor/solid-state device manufacturingFluorescenceOrganic light emitting device
The invention relates to an organic light-emitting device. The main body materials of a light-emitting layer comprise materials with hole transfer capability and electron transfer capability; a triplet state T1H of at least one kind of main body material is greater than or equal to a singlet state S1F of a fluorescent dye; a triplet state energy level T1H of a CT excited state of at least one kind material of the main body materials is higher than a singlet state energy level S1H of an n-<pi> excited state, and T1H-S1H is less than or equal to 0.3eV; or the triplet state energy level T1H of the CT excited state of at least one kind of material of the main body materials is higher than a triplet state energy level S1H of the n-<pi> excited state, and T1H-S1H is greater than or equal to 1eV; in addition, the difference value between the second triplet state energy level of the n-<pi> excited state of the main body materials, and the first singlet state energy level of the CT excited state is -0.1eV to 0.1eV; and the triplet states T1 of organic functional layer materials adjacent to the light emitting layer are all higher than the singlet state S1H of the main body materials of the light emitting layer. By adopting a thermal activation delayed florescence material as the main body materials, so that recombination of excitons in the light-emitting region is limited, a phenomenon of efficiency roll-off is effectively suppressed, and the device efficiency can be improved to 13-18%.
Owner:KUNSHAN NEW FLAT PANEL DISPLAY TECH CENT
Photovoltaic Structures and Method to Produce the Same
InactiveUS20090308456A1Efficient charge transportEfficiently quenchedSolid-state devicesSemiconductor/solid-state device manufacturingElectron donorHost material
The present disclosure relates to the field of organic optoelectronics. More particularly, the present disclosure relates to photovoltaic structures and to methods to produce the same. One aspect of the disclosure is a photovoltaic structure comprising:an electron acceptor material, andan electron donor material, wherein the electron donor material comprises:a host material, anda guest material,wherein the energy of the lowest excited singlet state of the guest is smaller than the energy of lowest excited singlet state of the host, wherein the fluorescence emission spectrum of the host overlaps with at least part of the absorption spectrum of the guest and wherein the energy of the lowest excited triplet state of the guest is larger than the energy of the lowest excited triplet state of the host.
Owner:INTERUNIVERSITAIR MICRO ELECTRONICS CENT (IMEC VZW)
Light-emitting component
The invention relates to a light-emitting component, in particular organic light-emitting diode, having an electrode and a counterelectrode and an organic region—arranged between the electrode and the counterelectrode—with a light-emitting organic region, which comprises an emission layer and a further emission layer and which, upon application of an electrical voltage to the electrode and the counterelectrode, is formed in a manner emitting light in a plurality of colour ranges in the visible spectral range, optionally through to white light, in which case the emission layer comprises a fluorescent emitter which emits light predominantly in the blue or in the blue-green spectral range; the further emission layer comprises one or a plurality of phosphorescent emitters emitting light predominantly in the non-blue spectral range; a triplet energy for an energy level of a triplet state of the fluorescent emitter in the emission layer is greater than a triplet energy for an energy level of a triplet state of the phosphorescent emitter in the further emission layer; and an at least 5% proportion of the light generated in the light-emitting organic region is formed in the visible spectral range as fluorescent light from singlet states of the fluorescent emitter in the emission layer.
Owner:NOVALED GMBH
Electroluminescence device based on boron-containing organic compound
ActiveCN110492006AImprove efficiencyExtend your lifeSolid-state devicesSemiconductor/solid-state device manufacturingOrganic light emitting deviceCharge carrier
The present invention relates to an electroluminescence device based on a boron-containing organic compound, wherein a main body material comprises a first organic compound and a second organic compound, the difference between a singlet state energy level and a triplet state energy level of the first organic compound is not greater than 0.2 eV, the singlet energy level of the second organic compound is greater than the singlet energy level of the first organic compound by more than 0.1 eV, and the triplet energy level of the second organic compound is greater than the triplet energy level of the first organic compound by more than 0.1 eV; the first organic compound and the second organic compound have the different carrier transport characteristics, wherein an object material is the boron-containing organic compound, the singlet energy level of the object material is lower than that of the first organic compound, and the triplet energy level of the object material is lower than that ofthe first organic compound. An organic light-emitting device prepared by the method has the characteristics of high efficiency and long service life.
Owner:JIANGSU SUNERA TECH CO LTD
Two phase transfer system-based singlet state oxygen generation method
InactiveCN105776144ARelieve quenchingProlong survival timeLaser detailsOxygen preparationChemical oxygen demandSinglet oxygen
The invention relates to a singlet state oxygen generation method, and belongs to the technical field of chemical oxygen-iodine lasers. The method comprises the following steps: mixing an alkaline ionic liquid insoluble in water with an aqueous hydrogen peroxide solution to form a two phase transfer system, and reacting the transferred ionic liquid phase with chlorine to generate singlet state oxygen in order to realize water and singlet state oxygen isolation. The method is helpful for reducing the quenching effect of water on singlet state oxygen, and reduces the content of water in the singlet state oxygen, and the alkaline ionic liquid has an enrichment effect on hydrogen peroxide to make effective solving of the bottleneck problem of hydrogen peroxide concentration restriction in the raw material regeneration process of chemical oxygen-iodine lasers under traditional technological conditions be possible, so the method is of great significance to improve the singlet state oxygen yield of the chemical oxygen-iodine lasers, reduce the water content of the singlet state oxygen and solve the raw material regeneration problem.
Owner:DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
Malononitrile-substituted aryl anthracene-phenanthrene organic electroluminescent material and preparation method and application thereof
ActiveCN108586289AHas thermally activated delayed fluorescence propertiesImprove performanceOrganic chemistrySolid-state devicesFluorescenceTriplet state
The invention discloses a malononitrile-substituted aryl anthracene-phenanthrene organic electroluminescent material and a preparation method and application thereof. The organic electroluminescent material uses malononitrile-substituted aryl anthracene-phenanthrene as a parent nucleus and a structural formula of the organic electroluminescent material is as shown in a formula (I). The malononitrile-substituted aryl anthracene-phenanthrene organic electroluminescent material provided by the invention is simple in preparation process; HOMO and LUMO energy level electron cloud can be effectivelyseparated; a singlet state and triplet state energy gap (delta EST) is small; triplet-state excitonic luminescence can be converted into singlet-state excitonic luminescence by RIST (Reverse InterSystem Traversing); the malononitrile-substituted aryl anthracene-phenanthrene organic electroluminescent material has the thermal activation delayed fluorescence property; when the malononitrile-substituted aryl anthracene-phenanthrene light-emitting material provided by the invention is applied to an OLED (Organic Light-Emitting Diode) light-emitting device, high device efficiency is obtained. (theformula (I) is shown in the specification).
Owner:NORTHWEST UNIV
Light-emitting component
ActiveUS20090230844A1Discharge tube luminescnet screensLamp detailsVisible spectral rangeTriplet state
The invention relates to a light-emitting component, in particular organic light-emitting diode, having an electrode and a counterelectrode and an organic region—arranged between the electrode and the counterelectrode—with a light-emitting organic region, which comprises an emission layer and a further emission layer and which, upon application of an electrical voltage to the electrode and the counterelectrode, is formed in a manner emitting light in a plurality of colour ranges in the visible spectral range, optionally through to white light, in which case the emission layer comprises a fluorescent emitter which emits light predominantly in the blue or in the blue-green spectral range; the further emission layer comprises one or a plurality of phosphorescent emitters emitting light predominantly in the non-blue spectral range; a triplet energy for an energy level of a triplet state of the fluorescent emitter in the emission layer is greater than a triplet energy for an energy level of a triplet state of the phosphorescent emitter in the further emission layer; and an at least 5% proportion of the light generated in the light-emitting organic region is formed in the visible spectral range as fluorescent light from singlet states of the fluorescent emitter in the emission layer.
Owner:NOVALED GMBH
Organic electroluminescent device
ActiveCN108695440AAchieve conversionIncrease the rate of energy transferSolid-state devicesSemiconductor/solid-state device manufacturingOrganic electroluminescenceSinglet state
The invention discloses an organic electroluminescent device. A light-emitting layer comprises a host material and a guest material. The host material is an exciplex formed by an electron donor material and an electron acceptor material, and the guest material is a thermally activated delayed fluorescent material. The singlet-state energy level of the host material is lower than the singlet-stateenergy level of the guest material. Since the singlet-state energy level of the exciplex as the host material in the light-emitting layer is lower than the singlet-state energy level of the thermallyactivated delayed fluorescent material, the generation of high-energy excitons is prevented, and molecular bond breakage due to high excitation energy is effectively suppressed. The singlet-state energy level of the exciplex is low, which is beneficial to reduce the excitation energy of the excitons in the device, and suppress the triplet state-triplet state annihilation, the triplet state-polaronquenching and the singlet state-triplet annihilation phenomena in the device, thereby reducing the efficiency roll-off of the device and prolonging the service life of the device.
Owner:KUNSHAN GO VISIONOX OPTO ELECTRONICS CO LTD +1
WOLED device
ActiveCN107403870AImprove luminous efficiencyIncrease profitSolid-state devicesSemiconductor/solid-state device manufacturingTriplet stateHole transport layer
The invention provides a WOLED device. The WOLED device comprises a total reflection anode, a hole transport layer, an electron blocking layer, a red phosphorescent light emitting layer, a blue fluorescent light emitting layer, a green phosphorescent light emitting layer, a hole blocking layer, an electron transport layer and a semi-transparent cathode which are stacked from the bottom up in sequence, wherein the main body material of the red phosphorescent light emitting layer is a hole transport type main body material; the main body material of the blue fluorescent light emitting layer is a bipolar transport type main body material; and the main body material of the green phosphorescent light emitting layer is an electron transport type main body material. By virtue of the additional electron blocking layer and the hole blocking layer, and by adoption of the total reflection anode and the semi-transparent cathode, electron and hole utilization rate can be improved effectively; and in addition, by selecting the reasonable main body materials and energy level design, singlet state exciton and triplet state exciton generated by the blue fluorescent layer can be fully utilized, thereby greatly improving the luminous efficiency of the WOLED device.
Owner:WUHAN CHINA STAR OPTOELECTRONICS SEMICON DISPLAY TECH CO LTD
Fused ring compound as well as preparation method and purpose thereof
ActiveCN108864108AImprove cavitation performanceIncrease HOMO levelOrganic chemistrySolid-state devicesElectronic transmissionTriplet state
The invention discloses a fused ring compound, which has a structure shown as a formula (I) or a formula (II). The effective conjugation of aromatic rings and heterocyclic rings is controlled in the fused ring compound; the hole performance is improved; meanwhile, the electronic transmission performance is favorably balanced; the compound has high triplet state energy level and glass transition temperature; material molecules cannot easily crystallize; when the fused ring compound is used as a luminescent layer host material, the efficient transfer of energy to guest materials can be guaranteed. The substituent group of the fused ring compound is regulated, so that the electron and hole transmission performance is further improved; the singlet state and triplet state energy level difference is reduced; the compound region of carriers is expanded; the triplet state exciton annihilation is prevented. The invention also discloses an organic electroluminescence device; at least one function layer contains the fused ring compound; the fused ring compound is used as the host material of the luminescent layer and is matched with the adjacent carrier transmission layer energy level; the luminous efficiency of the device is improved; meanwhile, the driving voltage of the device is reduced.
Owner:NINGBO LUMILAN NEW MATERIAL CO LTD
Conjugated polymer and preparation method thereof
The invention provides a conjugated polymer and a preparation method thereof. The polymer provided by the invention has a structure represented by a formula (I). The energy level difference between the first excitation singlet state and the first excitation triplet state of the polymer is relatively low, such that the polymer has E-type delayed fluorescence emission. The polymer has good luminescence properties when applied in electroluminescent devices.
Owner:CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
Organic electroluminescent element
InactiveUS20060186791A1Improve driving stabilityImprove heat resistanceDischarge tube luminescnet screensElectroluminescent light sourcesOrganic layerLuminescence
This invention relates to an organic electroluminescent element comprising a substrate, an anode, an organic layer and a cathode placed in layer one upon another; at least one layer in the organic layer is a luminescent layer comprising a host agent and a doping agent and an azole compound having an oxadiazole structure and a triazole structure in its molecule is used in at least one layer in the organic layer. This azole compound is used as a host agent in the luminescent layer and it can also be used in a hole blocking layer or electron transporting layer. This organic EL element is suitable for use in full-color and multicolor panels and shows a higher luminous efficiency and better driving stability than EL elements utilizing the luminescence from the singlet state.
Owner:NIPPON STEEL CHEMICAL CO LTD
Electroluminescent compound, OLED display panel and electronic equipment
InactiveCN109438446AAchieve separationAppropriate degree of overlapGroup 5/15 element organic compoundsSolid-state devicesOrganic filmElectricity
The invention provides an electroluminescent compound, an OLED display panel and electronic equipment. The electroluminescent compound is provided with a structure of a formula (I); the OLED display panel comprises an anode, a cathode and at least one organic film layer positioned between the anode and the cathode, and the organic film layer comprises a luminescent layer; the luminescent layer comprises any one or a combination of at least two of the electroluminescent compounds; and the electronic equipment comprises the OLED display panel. The electroluminescent compound provided by the invention has an energy electrode difference Delta Est between the lowest singlet state S1 and the lowest triplet state T1, wherein the Delta Estwhich is equal to ES1 minus ET1 being less than or equal to0.30 eV, and even the Delta Est which is equal to ES1 minus ET1 being less than or equal to 0.15 eV; and the electroluminescent compound has an TADF (Thermal Activation Delayed Fluorescence) materiallight-emitting mechanism, can be used in the field of organic photoelectric devices, and improves light-emitting efficiency, so thatthe electronic equipment comprising the electroluminescent compoundhas more excellent performance.
Owner:WUHAN TIANMA MICRO ELECTRONICS CO LTD
Red light organic electroluminescence device
ActiveCN108011047AExtend your lifeTake advantage ofSolid-state devicesSemiconductor/solid-state device manufacturingTriplet stateBiological activation
The invention discloses a red light organic electroluminescence device including a substrate, and a first electrode, a light emitting layer and a second electrode layer formed on the substrate in sequence. The light emitting layer includes body material and red phosphorescence dye. The body material includes first body material and second body material. The doping proportion of the second body material is 5 to 50 wt%. The doping proportion of the first body material is 50 to 95wt%. The triplet state energy level of the first body material T1<H1> is greater than 2.7eV while the wide energy gapEg is greater than 3.0 eV. According to the invention, by utilizing the extremely small energy level difference between the triplet state and the singlet state of thermal activation delayed fluorescence material, excitons on the T1 of the body can be transferred to S1 of the body quickly, so that the singlet state excitons and the triplet state excitons can be utilized effectively. Then through Forest energy transfer to phosphor material T1, device efficiency is improved to 18% to 23%.
Owner:KUNSHAN NEW FLAT PANEL DISPLAY TECH CENT
Organic electroluminescence device and display device
ActiveCN109346614AImprove luminous efficiencyHigh color puritySolid-state devicesSemiconductor/solid-state device manufacturingFluorescenceDisplay device
The invention provides an organic electroluminescence device and a display device. The organic electroluminescence device comprises an organic luminescent layer, wherein the organic luminescent layercomprises a main body material and a resonant thermal activation delayed fluorescence material; the main body material is an exciplex; the singlet state energy level of the exciplex is greater than that of the resonant thermal activation delayed fluorescence material, and the triplet state energy level of the exciplex is greater than that of the resonant thermal activation delayed fluorescence material. The organic electroluminescence device can overcome the defects of short device lifetime and wide spectrum caused by the fact that a traditional TADF material is used for luminescence at the present stage.
Owner:KUNSHAN GO VISIONOX OPTO ELECTRONICS CO LTD +1
Organic eletroluminesence element
InactiveCN1678150AImprove efficiencySolution to short lifeElectroluminescent light sourcesSolid-state devicesElectron injectionTriplet state
A hole injection electrode made of a transparent conductive film is formed on a substrate made of indium-tin oxide (ITO) or the like. On the hole injection electrode, a hole injection layer, a hole transport layer, a light emitting layer, an electron transport layer, and an electron injection layer are formed in order. On the electron injection layer, an electron injection electrode made of aluminum is formed. The light emitting layer includes a first dopant made of a material capable of converting triplet excitation energy to an emission of a predetermined color and a second dopant made of a material capable of converting single excitation energy to an emission of the same color as the predetermined color. The difference between the emission peak wavelength of the first dopant and the emission peak wavelength of the second dopant is preferably 20 nm or less.
Owner:SANYO ELECTRIC CO LTD
Organic electroluminescence device
ActiveCN104576953AImprove efficiencyExtend your lifeSolid-state devicesSemiconductor/solid-state device manufacturingOrganic layerTriplet state
The invention relates to an organic electroluminescence device. The device comprises a substrate, a first electrode layer, multiple organic layers and a second electrode layer, wherein the first electrode layer, the multiple organic layers and the second electrode layer are sequentially formed on the substrate, each organic layer comprises a hole transfer layer, a light emitting material layer and an electron transfer layer which are arranged on the first electrode layer in sequence, a hole / exciton barrier layer is arranged between each light emitting material layer and the corresponding electron transfer layer and comprises an organic barrier material and an electron transfer material doped in the organic barrier material, the triplet state energy level T1 of the organic barrier material is larger than that of the main material and that of the dye in the light emitting material layer, the LUMO energy level of the electron transfer material is larger than that of the organic barrier material, and the singlet state energy level of the electron transfer material is larger than that of the main material and that of the dye in the light emitting material layer. Due to the fact that the composite material is adopted for the hole / exciton barrier layer, exciton quenching and inactivation can be effectively prevented, electron mobility can be improved, and then the efficiency of the device is improved and the service life of the device is prolonged.
Owner:BAZHOU YUNGU ELECTRONICS TECH CO LTD
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