160 results about "Molecular orbital energy" patented technology

In a light-emitting element including an EL layer between a pair of electrodes, a structure is formed in which the EL layer includes at least a first layer having a hole-injecting property (a hole-injecting layer) and a second layer having a hole-transporting property (a hole-transporting layer) between the electrode functioning as an anode and a third layer having a light-emitting property (a light-emitting layer), and the absolute value of the highest occupied molecular orbital level (HOMO level) of the second layer is larger than that of the first layer, so that the injection amount of holes from the electrode side which functions as an anode is suppressed, and thus luminous efficiency of the light-emitting element is increased.

In a light-emitting element including an EL layer between a pair of electrodes, between an electrode functioning as an anode and a fourth layer having a light-emitting property (light-emitting layer), the EL layer includes at least a first layer having a hole-injecting property (hole-injecting layer), a second layer having a hole-transporting property (first hole-transporting layer), and a third layer having a hole-transporting property (second hole-transporting layer). The absolute value of the highest occupied molecular orbital level (HOMO level) of the second layer is larger than the absolute value of the highest occupied molecular orbital level (HOMO level) of each of the first layer and the third layer. With such a structure, the rate of transport of holes injected from the electrode functioning as an anode is reduced and emission efficiency of the light-emitting element is improved.

Provided is an organic light emitting diode which can easily control color coordinates and improve a device's life span characteristic by using an auxiliary dopant having a higher band gap energy than that of a host, and preferably, having an absolute value of the highest occupied molecular orbital energy level equal to or higher than that of the host, or an absolute value of the lowest unoccupied molecular orbital energy level equal to or lower than that of the host.

The organic light emitting diode includes a first electrode, an emission layer disposed on the first electrode and including a host, an emitting dopant and an auxiliary dopant, and a second electrode disposed on the emission layer. Here, the auxiliary dopant has a higher band gap energy than the host. A method of fabricating the organic light emitting diode is provided.

The embodiment of the invention discloses a compound. In the technical scheme, selecting a plane rigid trapezoid molecule s-indacene [1,2-b:5,6-b'] dithiophene containing sulphur atoms as a core, and utilizing the inter-lapping of pi electron cloud and the weak interaction of sulphur atoms to realize the strong interaction of the molecules; introducing dicyanovinyl of strong electron-withdrawing in the radial direction of the trapezoid core to reduce the unoccupied highest molecular orbital energy level of the molecule and simultaneously expand the degree of conjugation in the radial direction of the molecule so as to realize the effective injection and transmission of the electron; and introducing alkyl at the end of the trapezoid core to improve the self-organizing capability of the molecule during the process of film formation, thereby achieving a high ordered film to be used in an organic film transistor. The experiment shows that the electron mobility of the organic semiconductor material composed of the compound provided by the invention is 0.33cm2/V.s, and the electron mobility of the organic semiconductor material provided by the invention is significantly increased than the electron mobility of the organic semiconductor material provided by the prior art.

A sensitized photovoltaic device (10) provides for a reduction of the charge recombination rate and charge transport time. The device (10) includes a first electrode (12) comprising a transparent conducting oxide and a plurality of carbon nanostructures (16) formed thereon. A first layer (18) is formed on the carbon nanostructure (16) and comprises a first conduction band level (44). A second layer (20) is formed on the first oxide (18) and comprises a second conduction band level (46) higher than the first conduction band level (44). A sensitizer (22) is formed on the second layer (20) and comprises a lowest unoccupied molecular orbital level (48) higher than the second conduction band level (46). An electrolyte (24) is positioned over the sensitizer (22), and a second electrode (26) comprising a transparent conducting oxide and a layer of catalyst is formed over the electrolyte (24).

The invention provides an aromatic amine compound containing 9, 9'-spirobifluorene and dibenzofuran and an organic electroluminescent device thereof, and relates to the technical field of organic photoelectric materials. The preparation method of the compound is simple, the raw material is easy to obtain, the aromatic amine compound has the highest occupied molecular orbital energy level, a high T1 value and a high refractive index, has good hole transporting ability, thermal stability and film forming properties, is applied to the OLED device, can significantly improve the luminous efficiency, heat resistance and service life of the device and can effectively reduce the driving voltage of the device.

The invention provides an organic light-emitting diode array substrate and a display device and belongs to the technical field of organic light-emitting diode display. The problem that manufacturing equipment of an existing organic light-emitting diode array substrate is complex or the light-emitting efficiency is low can be solved. The organic light-emitting diode array substrate comprises a plurality of organic light-emitting diodes. Each organic light-emitting diode comprises an anode, a light-emitting layer and a cathode. The light-emitting layers are divided into multiple colors and formed by host materials and object materials doped in the host materials. Each organic light-emitting diode further comprises an exciton barrier layer which is arranged between the anode and the corresponding light-emitting layer and makes contact with the corresponding light-emitting layer. The exciton barrier layers are formed by the host material of one light-emitting layer, wherein the host material has the largest and highest occupying molecular orbital energy level and triplet-state energy level in the host materials of all the light-emitting layers.

The invention discloses a method for forecasting the acute toxicity of organic compounds by building a quantitative structure-activity relationship model with a quantum chemistry method. The method fully geometrically optimizes compound structures by using a Gaussian procedure so as to obtain quantum chemistry parameters including molecular volume, relative molecular mass, highest occupied molecular orbital energy, lowest unoccupied molecular orbital energy, energy gaps of frontier molecular orbital, dipole moment, solvation energy, electron energy and the like; using the quantum chemistry parameters and a hydrophobicity parameter as structural descriptors; in combination with toxicity data, quantitative relationship equations between various structural descriptors and toxicity are established according to a written procedure based on partial least square stepwise linear regression to obtain the multiple correlation coefficient, F-test value and sum of squared residuals, and then the model is verified so as to guarantee the external predictive ability. Therefore, the method can quickly and effectively forecast the toxicity of organic compounds to be studied, and provide necessary basic data for risk assessment and supervision of chemicals.

Disclosed is an organic light emitting device comprising a first electrode, two or more organic compound layers, and a second electrode, wherein the first electrode comprises a conductive layer and an n-type organic compound layer which is in contact with the conductive layer, one of the organic compound layers interposed between the n-type organic compound layer of the first electrode and the second electrode is a p-type organic compound layer forming an NP junction together with the n-type organic compound layer of the first electrode, energy levels of the layers satisfy the following Expressions (1) and (2), and one or more layers interposed between the p-type organic compound layer and the second electrode are n-doped with alkali earth metal:

0 eV<E_nL−E_F1≦4 eV  (1)

E_pH−E_nL≦1 eV  (2)

• • where E_F1 is a Fermi energy level of the conductive layer of the first electrode, E_nL is an LUMO (lowest unoccupied molecular orbital) energy level of the n-type organic compound layer of the first electrode, and E_pH is an HOMO (highest occupied molecular orbital) energy level of the p-type organic compound layer forming the NP junction together with the n-type organic compound layer of the first electrode.

The invention discloses a white light organic electroluminescent device which comprises a substrate, an anode layer, a cathode layer and an organic functional layer which is arranged between the anode layer and a cathode layer; the organic functional layer comprises a hole injection layer, a hole transmission and exciton blocking layer, a blue phosphorescence luminescent layer, a spacing layer, acomplementary phosphorescence luminescent layer and an electronic transmission layer; and the triplet state energy level of the hole transmission and exciton blocking layer is not less than that of the main material in the blue phosphorescence luminescent layer, the lowest unoccupied molecular orbit energy level of the spacing layer is higher than that of a blue phosphorescence luminescent material, and the triplet state energy level of the spacing layer is not less than that of the main material in a blue light emitting layer. By using the device, defects in the prior art are overcome, the performances and color stability under high current density of the device are improved, an efficient, stable and phosphorescence white light device is obtained, the cost of raw materials is lowered, and the device is more suitable for industrial production in large scale.

The invention provides an organic electroluminescent material and an organic electroluminescent device thereof, and relates to the technical field of organic photoelectric materials. The organic electroluminescent material is a mixture of two compounds. The highest occupied molecular orbital energy level, hole mobility and glass transition temperature of the organic electroluminescent material arevery high, so that the organic electroluminescent material has very good solubility, amorphous film formation, stability and fluorescence properties. As first and second hole transport layers, the organic electroluminescent material can be applied in OLED devices to significantly improve the luminescence efficiency, color purity and service life of the OLED devices, can also reduce the driving voltage of the OLED devices, and is an OLED material with excellent performance.

The invention provides a quantum dot electroluminescent device and a preparation method thereof. The quantum dot electroluminescent device comprises a first electrode layer; a quantum dot light emitting layer disposed on the surface of the first electrode layer; a functional layer disposed on a surface of the quantum dot light emitting layer remote from the first electrode layer, the functional layer includes a first sub-functional layer, a second sub-functional layer and a third sub-functional layer stacked in sequence, the second sub-functional layer comprises an electron transport material,the band gap widths of the materials corresponding to the first and third sub-functional layers are larger than that of the electron transport material, the highest occupied molecular orbital energylevels of the materials corresponding to the first and third sub-functional layers are smaller than that of the electron transport materials, and the lowest unoccupied molecular orbital energy levelsof the materials corresponding to the first and third sub-functional layers are larger than that of the electron transport materials, respectively. A second electrode layer disposed on a surface of the functional layer remote from the quantum dot light emitting layer. By adoption of the quantum dot electroluminescent device, while balanced carrier injection is realized, the material applicabilityis improved.

The present invention aims to provide an additive for a non-aqueous electrolyte solution with excellent storage stability capable of forming a stable SEI on the surface of an electrode to improve cell performance such as a cycle performance, a discharge/charge capacity, and internal resistance, when the additive is used for electrical storage devices such as non-aqueous electrolyte solution secondary cells and electric double layer capacitors. The present invention also aims to provide a non-aqueous electrolyte solution containing the additive for a non-aqueous electrolyte solution and to provide an electrical storage device using the non-aqueous electrolyte solution. The present invention is an additive for a non-aqueous electrolyte solution, comprising a compound that has a structure represented by the formula (1-1) or (1-2):

in which A represents C_mH_(2m-n)Z_n, m being an integer of 1 to 6, n being an integer of 0 to 12, and Z representing a substituted or unsubstituted alkyl group, a silyl group, a phosphonic acid ester group, an acyl group, a cyano group, or a nitro group, the compound having a lowest unoccupied molecular orbital energy of −3.0 to 0.4 eV, a standard enthalpy of formation of −220 to −40 kcal/mol, and an enthalpy change with hydrolysis reaction of −5 to 5 kcal/mol.

The invention provides a light-emitting device, a display device and lighting device containing the light-emitting device and a solar cell. The light-emitting device comprises an anode layer, a first hole transport layer, a light-emitting layer and a cathode layer, wherein the first hole transport layer is arranged on the surface of the anode layer, and a material for forming the first hole transport layer comprises nanoparticles; the nanoparticles are organic polymer hole transport material-metal sulfide; an organic polymer hole transport material is connected with metal sulfide through a covalent bond; the highest occupied molecular orbital energy level of the metal sulfide is deeper than that of the organic polymer hole transport material; the light-emitting layer is arranged on the surface, far away from the anode layer, of the first hole transport layer, and the material for forming the light-emitting layer comprises a light-emitting material; and the cathode layer is arranged on the surface, far away from the first hole transport layer, of the light-emitting layer. The rates that electrons and holes in the light-emitting device are injected into the light-emitting layer are basically consistent, so that the electrons and the holes approach or reach injection balance, the light-emitting efficiency of the device is improved and the service life of the device is prolonged.

The invention provides an organic electroluminescent material and an organic electroluminescent device thereof, and relates to the technical field of organic optoelectronic materials. The organic electroluminescent material is a mixture of two compounds. Under the synergistic action of the two compounds, the highest occupied molecular orbital energy level, hole mobility and vitrification transition temperature are high, and the solubility, amorphous film-formation property, stability and fluorescence properties are very good. When the organic electroluminescent material is applied to an OLED device as a first hole transport layer and a second hole transport layer, the luminous efficiency, color purity and service life of the device can be significantly improved, and the device driving voltage can be lowered. The organic electroluminescent material is an excellent OLED material.

The invention discloses an OLED, a display panel and a display device to improve the light-emitting efficiency and THE service life of the OLED. The OLED includes an anode, a cathode, at least two light-emitting layers disposed between the anode and the cathode, a charge generating layer disposed between any two adjacent light-emitting layers, a first functional layer and a second functional layer. The charge generating layer includes a first hole transport substrate, a first electron transport substrate, a first P-type semiconductor dopant, and a first N-type semiconductor dopant. The first functional layer includes a second electron transport substrate and a second N-type semiconductor dopant. The second electron transport substrate and the first electron transport substrate have the same lowest unoccupied orbital energy level. The second functional layer includes a second hole transport substrate and a second P-type semiconductor dopant. The second hole transport substrate and the first hole transport substrate have the same highest occupied molecular orbital energy level.

Provided are a donor substrate for laser induced thermal imaging (LITI) and a method of fabricating an organic light emitting diode (OLED) using the same, which can prevent a transferred emission layer from being damaged by heat and thus prevent wrinkles from forming on the surface thereof. The donor substrate includes a base layer, a light-to-heat conversion layer disposed on the base layer, a first transfer layer disposed on the light-to-heat conversion layer and including an organic layer, an inorganic layer, or a double layer thereof, and a second transfer layer disposed on the first transfer layer and including an emission layer. The first transfer layer has an absolute value of lowest unoccupied molecular orbital energy level of 2.6 to 3.0 eV and a band gap energy of 2.8 to 3.4 eV.

The invention provides an arylamine derivative and an organic electroluminescent device thereof and relates to the technical field of organic photoelectric materials. The arylamine derivative has theadvantages of simple preparation method, easily obtained raw materials, very good stability, very good film-forming property and good hole transporting ability; and meanwhile, the arylamine derivativehas an appropriate highest occupied molecular orbital energy level (HOMO) and a first triplet energy level (T1) value and can be applied to the OLED device as a luminescence assisting layer to realize balance of charges in a luminescent layer and prevent exciton from diffusing to one side of a hole transporting layer. Therefore, the arylamine derivative provided by the invention is applied to theOLED device as the hole transporting layer and the luminescence assisting layer and has the advantages that the luminescence efficiency of the device can be obviously enhanced, the color purity of the device can be obviously enhanced, the service life of the device can be effectively prolonged, the driving voltage of the device can also be effectively reduced, and the arylamine derivative is an OLED material with excellent performance.

An optoelectronic device is provided, the p-doped HTL device comprising an active layer comprising organometal halide perovskite and a hole transport layer (HTL) formed by vacuum evaporation and configured to transport hole carriers. The HTL includes a first sublayer comprising a hole transport material (HTM) doped with an n-dopant and disposed adjacent to the active layer, a second sublayer comprising the HTM that is undoped and disposed adjacent to the first sublayer, and a third sublayer comprising the HTM doped with a p-dopant and disposed adjacent to the second sublayer. The doping concentration of the n-dopant for the n-doped sublayer is determined to match the highest occupied molecular orbital energy level of the n-doped sublayer with the valence band maximum energy level of the perovskite active layer.