49results about How to "Widen the compound area" patented technology

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.

The invention relates to a novel iridium complex taking heterocyclic nitrogen as a main ligand and taking a thiobis diaryl/aromatic heterophosphamide compound as an auxiliary ligand. The heterocyclicnitrogen and phosphorus-sulfur groups in iridium complex molecules are helpful for increasing the electron mobility of a material and regulating the luminescence color, injection and transmission of cavity and electrons can be balanced, a composite area of a carrier is widened, the equipment efficiency is increased, and the efficiency roll-off is reduced. The iridium complex has the advantages ofsimple synthesis, stable chemical properties, easy sublimation purification, and excellent equipment performance, and provides convenience for acquiring a high-efficiency organic electroluminescent device and an application of the high-efficiency organic electroluminescent device in the fields of illumination and display.

The invention provides an organic compound with a specific structure. The organic compound is characterized by being shown as a general formula (I): the formula (I) is shown in the description; in theformula (I), X1 to X8 are respectively independently selected from CR1 or N respectively, wherein at least one is an N atom; L is a single bond and is C5 to C12 substituted or unsubstituted arylene and heteroarylene; R1 is selected from hydrogen, C1 to C10 aryl or cycloalkyl, C6 to C15 aryl or C6 to C19 condensed ring aryl and at least one is azacarbazole; Ar is substituted or unsubstituted N heterophenyl. The invention discloses an inverse intersystem crossing constant and emission delayed fluorescence rule and the designed compound is used for an organic electroluminescent device, can be used for effectively improving the current efficiency and is an organic electroluminescent material with good performance. The invention also provides the organic electroluminescent device adopting thecompound shown as the general formula.

The invention discloses a single-layer-structure inverted top-emission OLED (Organic Light Emitting Device), and belongs to the technical field of organic optoelectronic devices. The inverted top-emission OLED with the structure disclosed by the invention comprises a substrate, a cathode, a single-layer organic function layer and a transparent anode in sequence. The single-layer organic function layer is formed by doping two organic dyes into a single matrix material in a dopant mode, wherein the matrix material adopts an organic material with higher electron mobility, and the two organic dyes performs respective functions, namely, one organic dye is used for capturing holes, and the other organic dye is used for emitting light. According to the device with the structure disclosed by the invention, an exciton compound area is enlarged, the balance of electrons and holes in the single-layer organic function layer is favorably realized, and the device has the advantages of high efficiency, low efficiency roll-off, stability of light-emitting optical spectrum, and the like.

The invention discloses a 1,2,4-riazole acceptor-based thermally activated delayed fluorescence material with the structure represented by general formula (I) and capable of realizing dark blue lights. The material is formed through connecting the para-position of 3-substituted phenyl group of a 1,2,4-triazole derivative used as an acceptor unit with an N-containing donor unit. The thermally activated delayed fluorescence material has small singlet-triplet energy level difference, can meet requirements of the thermally activated delayed fluorescence material, allows a dark blue fluorescence material to be obtained, and improves the luminous efficiency of TADF type OLED devices.

The invention relates to a novel iridium complex taking heterocyclic nitrogen as a main ligand and taking a dithiolyl ring/aromatic heterocyclic phosphate compound as an auxiliary ligand. The heterocyclic nitrogen and phosphorus-sulfur groups in iridium complex molecules are helpful for increasing the electron mobility of a material and regulating the luminescence color, injection and transmissionof cavity and electrons can be balanced, a composite area of a carrier is widened, the equipment efficiency is increased, and the efficiency roll-off is reduced. The iridium complex has the advantages of simple synthesis, stable chemical properties, easy sublimation purification, and excellent equipment performance, and provides convenience for acquiring a high-efficiency organic electroluminescent device and an application of the high-efficiency organic electroluminescent device in the fields of illumination and display.

The invention relates to a novel iridium complex taking heterocyclic nitrogen as a main ligand and taking a sulfo aromatic ring/aromatic heterocyclic phosphate compound as an auxiliary ligand. The heterocyclic nitrogen and phosphorus-sulfur groups in iridium complex molecules are helpful for increasing the electron mobility of a material and regulating the luminescence color, injection and transmission of cavity and electrons can be balanced, a composite area of a carrier is widened, the equipment efficiency is increased, and the efficiency roll-off is reduced. The iridium complex has the advantages of simple synthesis, stable chemical properties, easy sublimation purification, and excellent equipment performance, and provides convenience for acquiring a high-efficiency organic electroluminescent device and an application of the high-efficiency organic electroluminescent device in the fields of illumination and display.

The invention relates to an organic electroluminescence device, in particular to a luminous layer structure of an organic white light emitting device. In the invention, in order to obtain a device with high efficiency, long service life and good color compatibility, particularly a white device, a compound luminous layer structure is adopted, and two different dyes are respectively doped; and the color of the device can be easily adjusted by adjusting the doping concentration of one dye so as to meet different color requirements, which is especially important for the white device.

The invention discloses an imidazole substituted spirofluorene compound and applications thereof, and discloses a compound represented by the following general formula defined in the specification, wherein X<1>-X<4> are selected from CR4 or N, R<4> is selected from hydrogen, C1-C10 alkyl, substituted or unsubstituted C6-C15 aryl and substituted or unsubstituted C3-C15 heteroaryl, R<1>-R<3> are selected from hydrogen, C1-C10 alkyl, substituted or unsubstituted C6-C15 aryl and substituted or unsubstituted C3-C15 heteroaryl, R<1>-R<3> are respectively and independently fused to a linked benzene ring to form C9-C30 aryl or heteroaryl, m and n are integers of 0-4, p is an integer of 0-3, L<1> and L<2> are selected from single bonds, substituted or unsubstituted C6-C30 arylene and substituted orunsubstituted C3-C30 heteroarylene, and Ar<1> and Ar<2> are selected from hydrogen, substituted or unsubstituted C6-C30 aryl and substituted or unsubstituted C3-C30 heteroaryl. According to the invention, with the application of the imidazole substituted spirofluorene compound as the luminescent material in an OLED device or an electron transport material, the compound shows excellent device performance and excellent stability. The invention further discloses an organic light-emitting device adopting the compound with the general formula.

The invention relates to a nitrogen-containing compound, and an electronic component and an electronic device comprising the same. The nitrogen-containing compound disclosed by the invention contains indolocarbazole, oxadiazole (thiadiazole) and a triazine group. The compound disclosed by the invention has relatively high electron mobility; and meanwhile, the compound has excellent hole transport performance. When the nitrogen-containing compound is used as a main body material, the balance of holes and electrons in an organic light-emitting layer can be improved, and the performance of a device can be remarkably improved.

The invention relates to an OLED device structure, and particularly relates to an optimization scheme of the doping proportion of a light-emitting layer of a phosphorescent doped organic light-emitting material device. The host-guest material of the light-emitting layer is unchanged, the doping ratio of the light-emitting layer is converted from single-layer doping to multi-layer echelon concentration doping, a material device is prepared through a vacuum evaporation method and can be applied to a novel flat panel display technology, and the device using the OLED device structure has good electroluminescent performance.

The invention discloses a deep ultraviolet AlGaN-based light emitting diode with a coupled quantum well structure. The deep ultraviolet AlGaN-based light emitting diode at least comprises an n-type semiconductor layer, a multi-quantum well structure and a p-type semiconductor layer, wherein the multi-quantum well structure is formed by periodically overlapping a barrier layer and a coupled AlGaN well layer, and the deep ultraviolet AlGaN-based light emitting diode is characterized in that the coupled AlGaN well layer at least comprises a three-layer structure, namely an Al<x>Ga<1-x>N well layer, an Al<y>Ga<1-y>N isolation layer and an Al<x>Ga<1-x>N well layer from bottom to top in sequence. Through the structural design of the coupling well layer, the spontaneous radiation recombination rate of a TE/TM mode of a c-surface LED is enhanced, the internal quantum efficiency of an LED device is improved, and the efficiency reduction effect of a nitride LED device is inhibited, so that the optical performance of the deep ultraviolet nitride light-emitting diode is improved.

The invention discloses a compound taking xanthone-linked dibenzofuran as a core. The structure of the compound is shown in a general formula (1) which is described in the specification. The compound contains a xanthone-linked dibenzofuran parent nucleus and a rigid branched chain structure, has relatively high glass transition temperature and molecular thermal stability, proper HOMO, LUMO energy levels and T1 energy level, high chemical bond energy and high carrier mobility, can effectively improve the efficiency of an OLED device through device structure optimization, and especially can reduce the voltage of the OLED device and prolong the service life of the OLED device.