37results about How to "Reduce annihilation" patented technology

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 discloses a decoration space peculiar smell purifying method and device and belongs to the technical field of air purification. The decoration space peculiar smell purifying method comprises the purifying process that peculiar smell in a decoration space enters a low-temperature plasma reactor to be treated and then enters a catalytic reactor, ultraviolet rays and a by-product ozone produced by the plasma reactor can strengthen the photocatalytic pollutant and intermediate product degradation process, residual ozone and nitric oxide and other by-products are removed through an efficient ozone decomposition catalyst, and meanwhile the peculiar smell in the decoration space is after-purified through an activated carbon layer and then is discharged into a room together with negative ions. The peculiar smell in a newly decorated room can be effectively treated, the ultraviolet rays and ozone produced by a low-temperature plasma can be also fully utilized to strengthen the photocatalytic pollutant and intermediate product degradation, the two processes complement each other's advantages, the energy utilization rate can be improved, and meanwhile the negative ions are released to actively purify an indoor air environment.

The invention discloses a green light organic electroluminescence device. The device includes a substrate, and a first electrode layer, a light emitting layer and a second electrode layer formed on the substrate in sequence. The light emitting layer includes body material and a green phosphorescence dye. The body material is thermal activation delayed fluorescence material (TADF) doped or not doped with cavity-type transmission material and the cavity-type transmission material. The mass ratio between the thermal activation delayed fluorescence material and the cavity-type transmission material is (0.1-100%):(99.9%-0%). The doping proportion of the green phosphorescence dye in the green phosphorescence dye is 0.5-10 wt%. According to the invention, Forster energy transfer is adopted for reducing TTA (Triplet State-Triplet State Annihilation), improving exciton utilization rate and further improving device efficiency and service life. The Delta E<ST> of the device provided by the invention is low (<0.3eV). The electron accepter stability is good and the torsion angle between accepters and donors is smaller and the radiative transmission rate is high. The single state S1 of the thermal activation delayed fluorescence material is lower than the single state S1 of a common subject and device drive voltage can be reduced effectively.

The invention discloses an organic electroluminescent device which comprises a transparent substrate layer, an anode layer, an organic electroluminescent structure and a cathode layer sequentially superposed. The transparent substrate layer is provided with a first surface and a second surface which are opposite to each other. The first surface is provided with convex lens-type convex parts arranged in array, and the second surface and the anode layer are superposed. The organic electroluminescent structure comprises an exciton balance layer and at least a luminescent layer superposed with the exciton balance layer. The organic electroluminescent device is high in luminescent efficiency and brightness and stable in luminescent efficiency and chromaticity coordinates. The preparation method of the organic electroluminescent device is simple in process, improves the production efficiency, reduces the production cost and is appropriate for industrialized production.

The invention relates to a blue-light TADF (thermally activated delayed fluorescence) aromatic material containing carbazole dendrites, a method for preparing a warm white device from the blue-light TADF aromatic material and an application of the blue-light TADF aromatic material, relates to a TADF material, a preparation method and an application, and aims to solve the problems that the conventional TADF blue-light guest material is poor in unicity, low in blue light color purity and low in efficiency. The structural formula of the blue-light TADF aromatic material containing the carbazole dendrites is shown in the description. The blue-light TADF aromatic material containing the carbazole dendrites is prepared from nitrogen-containing heterocyclic compound dendrites as well as dibromo difluorobenzene. The blue-light TADF aromatic material containing the carbazole dendrites is applied to a TADF electroluminescent device as a host luminescent material or a guest luminescent material and is applied to a phosphorescent device or the warm white device as the host luminescent material. The blue-light TADF aromatic material containing the carbazole dendrites and the method for preparing the device can be obtained.

The invention relates to a condensed-ring aryl compound, an organic electronic device, and an application thereof, wherein the condensed-ring aryl compound has the structure as the formula (I), wherein n is an integer of 0 to 5, X1, X2, Y1, Y2 are independently selected from a combination of a connecting bond, N and CR5, any one of the groups of R1 to R5 is independently connected to a ring A anda ring B via a single bond or a double bond, and/or, any adjacent two among the R1 to R5 form a ring C, being an electron-withdrawing ring, and the R1 to R5 are electron-withdrawing groups. The structure is a non-planar structure, so that annihilation due to high-energy exciton is reduced, and the positive electrode is promoted to inject a cavity into a cavity transport layer, and stack and crystallization of molecules in the cavity transport layer are avoided and service life of the device is prolonged. The main nuclear has a rigid structure, so that the stability of the device is enhanced. The substituent groups are electron-withdrawing groups, so that the compound has LUMO energy level of -4.6 to -6.0 eV. The compound can serve as a P-doping material.

The invention provides an organic compound, a preparation method and application thereof. The organic compound has a structure shown as formula I in the specification, the organic compound has high thermal decomposition temperature, high triplet state energy level and small energy level difference between HOMO and LUMO, the HOMO and LUMO energy levels of a specific structure compound match a holetransport layer and an electron transport layer, at the same time, a specific three-dimensional configuration does not cause stacking of material molecules, reduces annihilation caused by the existence of high-energy excitons, improves the energy transfer efficiency, improves the luminous efficiency, and lowers the driving voltage, the organic compound has high luminous stability, effectively reduces color cast, has high thermal decomposition temperature and high thermal stability, and improves the luminous efficiency and luminous performance of devices.

The embodiment of the invention provides an organic light-emitting device and a display device. The organic light-emitting device comprises an anode, a cathode and a light-emitting layer arranged between the anode and the cathode, wherein the light-emitting layer comprises a first light-emitting layer body, a second light-emitting layer body and a middle light-emitting layer body arranged betweenthe first light-emitting layer body and the second light-emitting layer body. The first light-emitting layer or the second light-emitting layer comprises a guest material doped in a host material; thefirst light-emitting layer and the second light-emitting layer are used for forming an exciplex, and the exciplex and the guest material meet the conditions: S1(AEX)-S1(B) >=0.1 eV, and T1(AEX)-T1 (B)>=0.1 eV. According to the invention, the separation of a luminescence center and a recombination center is effectively realized, a non-radiation effect is reduced, a trap effect of a TADF material on charges is reduced, triplet exciton annihilation is reduced, efficiency roll-off is avoided, and device performance is improved.

The invention discloses a phenanthroline-containing organic complex and an organic light emitting device (OLED) thereof and relates to the technical field of organic photoelectric materials. An electron-rich diazo coordination structure in the complex structure is favorable for stabilizing the central trivalent metal cation and also influences the distribution of electron cloud on metal iridium, thereby generating great influence on photoelectric properties of whole complex molecules; and a four-membered ring composed of the ligand of the diazo coordination structure and metal has stronger rigidity, thereby being favorable for reducing unnecessary vibration energy loss and realizing efficient light emitting performance. By adjusting substituent groups, the complex has better thermal stability and chemical properties. The complex can be prepared into a device and especially can serve as a doping material, and the device shows the advantages of low driving voltage and high light emittingefficiency and is superior to an existing common OLED.

The invention belongs to the technical field of electron transport materials and discloses an organic small molecule electron transport material and a preparation method and application thereof. The organic small molecule electron transport material has the structure shown in the formula I. The method comprises that (1) o-aminodiphenylamine and p-bromobenzoyl chloride as raw materials undergo a reaction to produce an open-loop intermediate product, (2) the open-loop intermediate product undergoes a ring-closure reaction to produce a ring-closed bromine-containing intermediate product, (3) in the catalytic system, the ring-closed bromine-containing intermediate product and bis(pinacolato)diboron undergo a reaction to produce a borate-containing product and (4) in the catalytic system, the borate-containing product and 3-bromo-1, 10-phenanthroline undergo a coupling reaction to produce the organic small molecule electron transport material. The organic small molecule electron transport material has good thermal stability and good electron injection performances, can improve the luminous efficiency and stability of the device and is prepared through a simple method.

The invention relates to tea processing equipment based on solar power generation and heating. The tea processing equipment comprises a tea processing chamber, wherein a roof of the tea processing chamber is composed of a plurality of sub-roofs connected transversely; the cross sections of the sub-roofs are in a scalene triangle shape; Solar photovoltaic panels are uniformly distributed on the south sides of the sub-roofs; the solar photovoltaic panels are based on dye sensitized solar batteries; the dye sensitized solar batteries comprise photo-anodes, counter electrodes, dye and electrolyte,wherein the photo-anodes comprise FTO substrates, light transmission layers are arranged on the surfaces of the FTO substrates, scattering layers are arranged on the surfaces of the light transmission layers, and the light transmission layers and the scattering layers are separately formed by screen printing light transmission layer slurry and scattering layer slurry; the light transmission layers comprise TiO2 hollow spheres, MnO2 nanoparticles, graphene and TiO2 nanoparticles; and the scattering layers comprise hollow Ni-TiO2 nano-sieves and TiO2 nanoparticles.

The invention provides a condensed-ring aryl compound, an organic electronic device, and an application thereof. The compound has the structure represented as the formula (I) or (II), wherein X1, X2 and Y1 are independently selected from a combination of a connecting bond, N and CR6, the ring A and the ring B are in a conjugated structure, any one of the R1 to R4 and the R6 are independently connected to the ring A the ring B via a single bond or a double bond, and/or the any adjacent two among the R1 to R4 and the R6 form a ring C, being an electron-withdrawing ring, the R5 is selected from aconnection bond, R7-substituted or -non-substituted C6-C30 aryl groups, and R7-substituted or -non-substituted C2-C30 heteroaryl groups, and the R1 to R4, R6 and R7 are electron-withdrawing groups. The compound is free of intramolecular stacking and can prolong service life of the device, wherein the substituent groups are electron-withdrawing groups, and the compound has LUMO energy level of -4.6 to -6.0 eV. The compound can serve as a P-doping material.

The invention discloses a metal complex and an organic electroluminescence device thereof, relating to the technical field of organic optoelectronic materials. A first ligand and an auxiliary ligand in a structural formula I (shown in the description) are capable of well stabilizing central metal atoms, and the first ligand and a second ligand respectively form a five-member ring configuration anda four-member ring configuration with the metal atoms, so that the metal complex has a relatively rigid structure, and the high-performance and high-efficiency phosphorescence emission is realized. By introducing a large-volume substituent group, the glass transition temperature and the thermal stability of the metal complex are respectively effectively increased and improved, and the film formation of a material is promoted. The organic electroluminescence device comprises a cathode, an anode and one or more organic matter layers, wherein at least one organic matter layer contains the metalcomplex. The organic electroluminescence device is relatively low in driving voltage, relatively high in luminous efficiency and luminance and has a relatively long service life.