174results about How to "Improve device efficiency" patented technology

The present invention provides a stacked organic light emitting device, comprising a first conductive layer, at least one intermediate conductive layer and a second conductive layer, and light emitting units disposed between the conductive layers, wherein at least two non-neighboring conductive layers among the conductive layers are conductive layers belonging to Group 1 such that they are electrically connected with each other to a common potential; at least one non-neighboring conductive layer among the conductive layers which are not electrically connected with the conductive layers belonging to Group 1 to a common potential are conductive layers belonging to Group 2 such that they are electrically connected with each other to a common potential; and the conductive layers belonging to Group 1 and the conductive layers belonging to Group 2 are connected with each other via a voltage regulator for alternately applying a positive voltage and a negative voltage.

Disclosed are an image encoding and decoding method and an image decoding device for selecting a prediction candidate from reference blocks of a reference picture, which includes a current picture, and using the selected prediction candidate so as to derive motion information on a current block during image encoding and decoding. The image encoding and decoding method includes the steps of: configuring a spatial motion vector candidate; determining whether the reference picture of the current block is present within the current picture; and adding a spatial motion vector candidate in other block of the current picture encoded before the current block, when the reference picture of the current block is present within the current picture.

The present invention relates to novel compositions comprising light emitting materials and/or charge transport materials and a polymeric binder, to their use as conducting inks for the preparation of organic light emitting diode (OLED) devices, to methods for preparing OLED devices using the novel formulations, and to OLED devices prepared from such methods and formulations.

Disclosed herein are novel light-emitting materials of Formula I and II below. These new complexes are synthesized and found to be sufficiently stable to allow sublimation and vacuum deposition. These new emitters are electrophosphorescent and can be used in organic light-emitting devices (OLEDs) for device elements capable of emitting light of color ranging from orange to red with high-efficiency and high-brightness.

wherein E=Group 16 elements (including sulphur); M=Group 10 metal (including platinum); R₁-R₁₄ are each independently selected from the group consisting of hydrogen; halogen; alkyl; substituted alkyl; aryl; substituted aryl, with substituents selected from the group consisting of halogen, lower alkyl and recognized donor and acceptor groups. R₁ can also be selected from (C≡C)_nR₁₅, where (C≡C) represents a carbon-carbon triple bond (acetylide group), n is selected from 1 to 10, and R₁₅ is selected from alkyl, aryl, substituted aryl, and tri(alkyl)silyl.

A linearly reflecting trough concentrator that receives spectral energy, preferably visible and near-infrared solar energy spectra, and linearly reflects that energy onto a smaller area on one side of the device, thereby concentrating the energy. The linearly reflecting trough concentrator has the geometry of a single slope-relief interval in a Fresnel lens, and in preferred embodiment comprises an array of heliostatic facets connected continuously to form the base of the trough, a non-imaging focal point where a photonic receiver is located, and a relief surface to connect the heliostatic array to the receiver location. When spectral energy enters the trough at an angle normal to the array's horizontal reference, the concentrator linearly reflects energy to one side of the device where an energy receiver is mounted. The concentrator comprises an array of heliostats oriented according to the negative profile of two interleaved linear Fresnel lens, where the slope of one is the relief of the other. The concentrator reflects energy above and to each side of the device. Optionally using a reflecting projector on one side of the device, energy is then doubly concentrated to the other side. The device offers higher concentration ratios with an equivalent trough depth than prior art reflective trough concentrators. The device requires less depth and offers a lower-profile than prior art reflecting concentrators with the same degree of concentration.

Visible light LEDs are produced having a layer of conjugated polymer which is cast directly from solution or formed as a gel-processed admixture with a carrier polymer. The LEDs can be formed so as to emit polarized light.

The invention relates to a blue light emitting functional material and the application, which relates to star shooting shape oligomer blue light emitting functional material and the application. The material is monodisperse star shooting shape oligomer on the basis of minami carbazolyl element, the oligomer has the structure of a general formula 1, the material contains minami carbazolyl element, has monodisperse star shooting shape three-dimensional space structure, is easy to form stable amorphous state, and displays excellent filming property and light emitting property. The material has potential application in the fields such as organic electroluminescence, organic laser, organic non-linear optical material and the like. Particularly, organic electroluminescent devices which utilize the functional material to be blue luminescent material have improved luminescent brightness, device efficiency, color purity and spectroscopic stability.

The invention relates to the application of four co ordinations quinolyl copper complexes with counter ion as phosophosrescence material in organic eletrolumniescence furniture. Tow craft is adopted. First, film by self no doping liquor. Second, film by macromolecule as main material cross blend liquorl. Use two methods, lead copper complexes to luminescent layer, and then add carrier transfer material to luminescent layer or lead single carrier transfer material to form monolayer or multilayer furniture. Thus, the organic eletrolumniescence furniture can gives off highly active light from red to green.

Ultraviolet light-emitting diodes with tailored AlGaN quantum wells can achieve high extraction efficiency. For efficient bottom light extraction, parallel polarized light is preferred, because it propagates predominately perpendicular to the QW plane and into the typical and more efficient light escape cones. This is favored over perpendicular polarized light that propagates along the QW plane which requires multiple, lossy bounces before extraction. The thickness and carrier density of AlGaN QW layers have a strong influence on the valence subband structure, and the resulting optical polarization and light extraction of ultraviolet light-emitting diodes. At Al>0.3, thinner QW layers (<2.5 nm are preferred) result in light preferentially polarized parallel to the QW plane. Also, active regions consisting of six or more QWs, to reduce carrier density, and with thin barriers, to efficiently inject carriers in all the QWs, are preferred.

An in-vehicle power supply device includes an electric generator, a main power supply, a DC/DC converter, a power storage unit connected with the electric generator via the DC/DC converter, and a controller for controlling the DC/DC converter. The DC/DC converter is operable to store, in the power storage unit, regenerative electric power generated by the electric generator, and to discharge the stored regenerative electric power from the power storage unit to the main power supply and the load. The controller is operable to stop the DC/DC converter when a charging-status value indicating a charging status of the power storage unit is not larger than a predetermined lower limit value. The controller is operable to activate the DC/DC converter when the charging-status value is larger than the lower limit value and the vehicle ends deceleration. The controller is operable to activate the DC/DC converter when a speed of the vehicle is not lower than a predetermined speed and an accelerator position of the engine is not larger than a predetermined accelerator position even if the charging-status value is not larger than the predetermined lower limit value. The in-vehicle power supply device is capable of reducing power consumption of the DC/DC converter, with the recovery efficiency of the regenerative electric power being held, thereby resulting in a higher efficiency of the device.

The invention relates to a perovskite light emitting diode with compounds containing CH2CH2O. The perovskite light emitting diode comprises a substrate, a hole transport layer, an active light emitting layer, an electron transport layer, electrode modification layers and electrodes. The thickness of the active light emitting layer is 5-100 nanometers, the active light emitting layer comprises perovskite and the compounds containing the CH2CH2O, and the compounds containing the CH2CH2O are doped in the perovskite; the molecular formula of the perovskite is MAPbX3, FAPbX3 or CsPbX3, wherein X represents one or two of Cl, Br and I; the compounds containing the CH2CH2O are 12-crown ether-4, 15-crown ether-5, benzo-15-crown ether-5, 18-crown ether-6 and the like. The invention further providesa method for preparing the perovskite light emitting diode. The method includes: forming the hole transport layer or the electron transport layer on the substrate; modifying a perovskite precursor solution with the compounds containing the CH2CH2O on the hole transport layer or the electron transport layer to form the active light emitting layer; sequentially forming the electron transport layer,the negative electrode modification layer and the negative electrode at the top of the active light emitting layer or sequentially forming the hole transport layer, the positive electrode modificationlayer and the positive electrode at the top of the active light emitting layer; carrying out encapsulation.

The invention discloses an organic light-emitting display panel, a preparation method and a display device, wherein the organic light-emitting display panel comprises a display area and a non-displayarea surrounding the display area, the display panel comprises a substrate, an organic light-emitting structure array layer, a plurality of film layers, and a hydrophobic structure; the organic light-emitting structure array layer is located in the display area of the substrate; the plurality of film layers are located on one side of the substrate facing the organic light-emitting structure arraylayer and extend to the non-display area; and the hydrophobic structure is located between any two adjacent film layers of the plurality of film layers in the non-display area. According to the organic light-emitting display panel, the preparation method and the display device provided by the embodiment of the invention, water and oxygen can be effectively prevented from seeping into the gaps of the film layers in the non-display area, the light-emitting material and the cathode material in the organic light-emitting display panel are prevented from being corroded, effective blocking of waterand oxygen is realized, and the packaging effect of the organic light-emitting display panel is guaranteed.

The invention discloses an indeno[1,2-b]fluorene unit-based A-D-A conjugate micro-molecule, and an application thereof in photoelectric devices. The conjugate micro-molecule is centered on an indeno[1,2-b]fluorine unit, and adopts a conjugate unit as a bridge bond and different electron withdrawing units as end groups. The conjugate micro-molecule has good absorption and appropriate energy grade in the visible range, and can be applied to donor materials and receptor materials in organic solar cells to make the devices have a good efficiency.

The invention relates to a thermally activated delayed fluorescence compound, a preparation method thereof and an organic light emitting diode device. The structural general formula of the thermally activated delayed fluorescence compound is shown in formula I as shown in specification, and R shows a chemical group as an electron donor. Trifluoromethyl (-CF3) serves as a strong electron donor group, the electron donor group is changed by matching different functional groups, influences of the intensity of the electron donor to properties of a material are researched, and the sky blue thermallyactivated delayed fluorescence compound with remarkable TADF characteristic is designed. The thermally activated delayed fluorescence compound is a sky blue TADF compound with ultra-fast reverse intersystem crossing rate and high luminous efficiency, therefore, when the thermally activated delayed fluorescence compound as a luminous material is applied to the organic light emitting diode device,the luminous efficiency of the organic light emitting diode device can be improved effectively, and the organic light emitting diode device based on the thermally activated delayed fluorescence compound has quite high device efficiency.

The invention discloses a heat-resistant organic electronegative semiconductor. Electrophilic groups EW1 and EW2 are connected with aromatic heterocycle-substituted benzophenanthrene compound structural bond to obtain compounds (I). The heat-resistant organic electronegative semiconductor can be used in organic photoelectric electronic devices to enhance the efficiency of the devices, lower the working voltage of the devices and prolong the high-temperature service life.

The invention discloses a process method for production of alpha-olefin by oligomerization of selective ethylene; a high-pressure reaction kettle is externally connected with a material circulation pipeline; the material circulation pipeline is provided with a heat exchanger and a gas-liquid separator; in the synthesis process of alpha-olefin, ethylene is inputted to the high-pressure reaction kettle, alpha-olefin synthesized in the presence of a catalyst and a reaction solvent is dissolved in a solvent in the kettle, and a reaction liquid containing a product flows out from the bottom of thekettle, then has heat exchanged by the heat exchanger, enters the gas-liquid separator and is subjected to gas-liquid separation; gas discharged from the top of the gas-liquid separator flows back toa gas mixing tank, and a liquid is sent back to the high-pressure reaction kettle. The invention also relates to a system implementing the process. Heat generated from the reaction is removed in time,the reaction temperature is steadily controlled, and the activity and the selectivity of the catalyst are improved.

The invention discloses a high-efficiency hybrid white OLED with a high color rendering index. The OLED comprises a substrate, an anode, a cavity implantation layer, a cavity transmission layer, a first blue fluorescent layer, a yellow and red phosphorescent layer, a second blue fluorescent layer, an electron transmission layer, an electron implantation layer and a cathode which are laminated successively from bottom to top; the yellow and red phosphorescent layer is formed by locating a yellow light material and a red light material in the same light emission layer; the first blue fluorescentlayer is arranged adjacent to the yellow and red light emission layer and separated from the yellow and red light emission layer by a spacing layer, the yellow and red phosphorescent layer is arranged adjacent to the second blue fluorescent layer and separated from the second blue fluorescent layer by a spacing layer, the concentration of red light emitted by the red light material is lower thanthe concentration of yellow light emitted by the yellow light material in the yellow and red light emission layer, and each of the first and second blue fluorescent layer is a non-doped or doped lightemission layer. The hybrid white OLED is high in efficiency and color rending index, simple in structure and convenient to popularize, can be popularized commercially, and has good market prospects.

The invention provides an indeno heteroanthracene compound which is characterized by having a structure represented by the general formula (I), wherein X and Y are independently selected from NR, O, S, SO, SO2, SiR2, CR2, PR and POR, and R is selected from substituted or unsubstituted phenyl, benzene-containing compound groups, heterocyclic compound groups and polycyclic aromatic hydrocarbon groups. The invention also provides an OLED phosphorescent host material containing the compound and an OLED device containing the compound. The invention provides the indeno heteroanthracene compound and an application thereof as the main material; the shortcomings that small-molecular main materials are easy to crystallize and some wide-band main materials have low Tg are solved, and moreover, because groups having electron donating properties and groups having electron withdrawing properties are simultaneously introduced in the structure, conduction performance of electrons and holes of the main material can be balanced, and the efficiency of the device is improved.

The invention relates to the technical field of solar batteries and in particular relates to a cathode interface modification material as well as a preparation method and application thereof. The cathode interface modification material has a structural formula I as shown in the specification, in the formula, R1 is selected from any one of H and formulae as shown in the specification, and R2 is selected from any one of formulae as shown in the specification. The cathode interface modification material provided by the invention has high photoelectric conversion efficiency, can be applied to organic polymer solar batteries and particularly applied to non-fullerene solar batteries. According to the cathode interface modification material provided by the invention, lateral groups of which the steric hindrance is gradually increased are introduced into both sides of perylene bisimide, so that perylene bisimide molecules are further twisted, regulation and control on molecule accumulation states can be achieved, the morphology and the device efficiency of a membrane can be optimized, and the photoelectric conversion efficiency can be improved.

The invention discloses a preparation method of a perovskite solar cell with ternary mixed solvent. In the preparation of perovskite photovoltaic solar cells, N, N-Dimethylformamide (DMF), Dimethyl Sulfoxide (DMSO), GAMMA-Butyrolactone (GBL) ternary mixed solvent is used to prepare perovskite precursor, Compared with the binary mixed solvents, the crystalline quality of the perovskite film is greatly improved. The perovskite absorbing layer prepared by the three solvents at this ratio enlarges the grain size, reduces the carrier recombination loss caused by the defects at the grain boundary, increases the carrier lifetime, and ultimately improves the photoelectric conversion efficiency of the perovskite solar cell device, and improves the series-parallel resistance of the device.

The invention provides an optoelectronic device comprising: (i) a porous dielectric scaffold material; and (ii) a semiconductor having a band gap of less than or equal to 3.0 eV, in contact with the scaffold material. Typically the semiconductor, which may be a perovskite, is disposed on the surface of the porous dielectric scaffold material, so that it is supported on the surfaces of pores within the scaffold. In one embodiment, the optoelectronic device is an optoelectronic device which comprises a photoactive layer, wherein the photoactive layer comprises: (a) said porous dielectric scaffold material; (b) said semiconductor; and (c) a charge transporting material. The invention further provides the use, as a photoactive material in an optoelectronic device, of: (i) a porous dielectric scaffold material; and (ii) a semiconductor having a band gap of less than or equal to 3.0 eV, in contact with the scaffold material. Further provided is the use of a layer comprising: (i) a porous dielectric scaffold material; and (ii) a semiconductor having a band gap of less than or equal to 3.0 eV, in contact with the scaffold material; as a photoactive layer in an optoelectronic device. In another aspect, the invention provides a photoactive layer for an optoelectronic device comprising (a) a porous dielectric scaffold material; (b) a semiconductor having a band gap of less than or equal to 3.0 eV, in contact with the scaffold material; and (c) a charge transporting material.

The invention relates to compounds, an organic photoelectric device and an electronic device. The compounds have a structure represented by a formula (I). The organic photoelectric device comprises an anode, a cathode, and an organic thin layer arranged between the anode and the cathode. The organic thin layer comprises any one of the compounds or at least two of the compounds. The electronic device comprises the organic photoelectric device. The provided compounds have a TADF characteristic; the transition of conventional fluorescence molecules is forbidden to obtain triplet exciton to give off light, and thus the device has high light emission efficiency and a low work voltage.

The invention relates to a thermal active delay fluorescent material and a light-emitting device made with the same. The thermal active delay fluorescent material has molecular structure shown as formula (I) that is shown in the description, has very small triplet state-singlet state level differences, suitable molecular level, and good film stability, can provide thermal active delay fluorescenceand act as a light-emitting layer of an organic light-emitting device for the field of organic light emission.

The invention relates to thermally-activated delayed fluorescence materials and application thereof. The materials have a molecular structure as shown in a formula (I). The thermally-activated delayedfluorescence materials have very small triplet-singlet energy level difference, proper molecular energy levels and good film stability, can realize thermally-activated delayed fluorescence radiationand are applicable as light-emitting layers of organic electroluminescent devices to the field of organic electroluminescence.

The invention discloses a conjugated polymer based on a naphthothio dibenzofuran unit as well as a preparation method and an application thereof. In the invention, the conjugated polymer based on a naphthothio dibenzofuran unit is obtained through a Suzuki polymerization reaction. The conjugated polymer based on a naphthothio dibenzofuran unit disclosed by the invention has relatively good solubility; and after the conjugated polymer is dissolved with a common organic solvent, a luminous layer of a light emitting diode is prepared through spinning, ink-jet printing or printing film formation. The luminous layer based on the polymer is not subjected to annealing treatment during preparation of a luminous device, and thus the preparation technology is simpler.