1321 results about "Electron transporting material" patented technology

An organic electroluminescence device (1) including: an anode (20) and a cathode (50), at least two organic emitting layers (30), (32) and (34) interposed between the anode and the cathode, and at least one intermediate connection layer (40) and (42) being provided between the organic emitting layers (30), (32) and (34), the intermediate connection layer (40) and (42) comprising an acceptor layer, a donor layer and an electron-transporting material layer being stacked in this order from the cathode (50), the electron-transporting material layer containing a non-complex compound with a nitrogen-containing heterocyclic structure.

A tandem light-emitting element employing an inverted-structure is provided. The light-emitting element includes a cathode, a first EL layer over the cathode, a second EL layer over the first EL layer, an anode over the second EL layer, and an intermediate layer. The intermediate layer is between the first EL layer and the second EL layer. The intermediate layer includes a first layer, a second layer over the first layer, and a third layer over the second layer. The first layer includes a hole-transport material and an electron acceptor. The third layer includes an alkali metal or an alkaline earth metal. The second layer includes an electron-transport material.

Provided is a novel light-emitting element, a light-emitting element with a long lifetime, or a light-emitting element with high emission efficiency. The light-emitting element includes an EL layer between a pair of electrodes. The EL layer includes at least a light-emitting layer containing a fluorescent substance and a host material, a first electron-transport layer containing a first electron-transport material, and a second electron-transport layer containing a second electron-transport material, which are in contact with each other and in this order. The LUMO level of each of the host material and the second electron-transport material is higher than the LUMO level of the first electron-transport material.

It is an object to provide an organic light-emitting element having two or more light-emitting layers, wherein degradation of each constituent material for the light-emitting layer is reduced to improve reliability of the element. The present invention provides an organic light-emitting element having a laminated structure with a first mixed light-emitting layer 4 composed of a hole transport material, an electron transport material and a dopant which determines a color of an emitted light, and a second mixed light-emitting layer 5 composed of a hole transport material, an electron transport material and a dopant which determines a color of an emitted light, and also provides an image display device which uses the organic light-emitting element.

A tandem OLED device includes an anode, a cathode, at least first and second electroluminescent units disposed between the anode and the cathode. The electroluminescent units include an individually selected organic light-emitting layer and an intermediate connector disposed between the first and second electroluminescent units. The intermediate connector includes an n-type doped organic layer having an n-type dopant and an electron-transporting material. The electron-transporting material is a mixture of a first organic compound that has the lowest LUMO value of the compounds in the n-type doped organic layer, in an amount greater than or equal to 10% by volume and less than 100% by volume of the layer; at least one second organic compound exhibiting a higher LUMO value than the first organic compound.

An OLED device including a cathode, an anode, one or more light-emitting layers disposed between the anode and cathode to produce white light and a layer disposed between the light-emitting layer(s) and the cathode. The layer includes a polycyclic aromatic hydrocarbon compound that has the lowest LUMO value of the compounds in the layer, in an amount greater than or equal to 10% by volume and less than 100% by volume of the layer; at least one second compound exhibiting a higher LUMO value than the polycyclic aromatic hydrocarbon compound, where at least one of the second compounds is a low voltage electron-transporting material, and the total amount of such second compounds(s) is less than or equal to 90% by volume of the layer; and a metallic material based on a metal having a work function less than 4.2 eV.

A white organic light emitting diode (OLED) includes an emission layer that includes a blue emission layer and an emission layer excluding blue. The emission layer excluding blue includes a phosphorescent material and a mixture of a hole transporting material and electron transporting material.

An organic electroluminescence device comprising a cathode, an anode and at least one layer comprising a phosphorescent light emitting material and a host material which is sandwiched between the cathode and the anode and further comprising an electron injecting layer which is adhered to the light emitting layer and is capable of transporting electrons, wherein an ionization potential of the host material is 5.9 eV or smaller, and wherein an energy gap of the electron transporting material in the electron injecting layer is smaller than that of the host material in the light emitting layer or wherein a triplet energy of the electron transporting material in the electron injecting layer is smaller than that of the host material in the light emitting layer. It emits phosphorescent light with enhanced efficiency because it comprises a light emitting layer and an electron injecting layer both satisfying specified condition and employs a light emitting layer capable of electron transporting.

An OLED device includes an anode, a first light-emitting layer disposed over the anode, and a second light-emitting layer disposed over the first light-emitting layer. The device also includes a metal-doped organic layer containing an organic electron-transporting material and a low work function metal disposed over the second light-emitting layer, and a cathode disposed over the metal-doped organic layer.

A light emitting device and electronic equipment having a long life at a low electric power consumption are provided. A hole transporting region composed of a hole transporting material, an electron transporting region composed of an electron transporting material, and a mixture region in which both the hole transporting material and the electron transporting material are mixed at a fixed ratio are formed within an organic compound film. Regions having a concentration gradient are formed between the mixture region and carrier transporting regions until the fixed ratio is achieved. In addition, by doping a light emitting material into the mixture region, functions of hole transportation, electron transportation, and light emission can be respectively expressed while all of the interfaces existing between layers of a conventional lamination structure are removed. Organic light emitting elements having low electric power consumption and a long life can thus be provided, and light emitting devices and electronic equipment can be manufactured using the organic light emitting elements.

A white organic light emitting diode (OLED) includes an emission layer between two electrodes. The emission layer comprises two or more kinds of compounds for the host and two or more kinds of compounds for the dopant that facilitate production of a white color. Among the two or more kinds of compounds for the host, at least one is a hole transporting material and the other is an electron transporting material. The white OLED has improved stability which increases its efficiency and life.

The present invention provides an organic electroluminescence element having at least a light-emitting layer disposed between a pair of electrodes, wherein the light-emitting layer includes at least two electron transporting materials and a hole transporting host material, with at least one of the electron transporting materials being an electron transporting light-emitting material, and a total concentration of the at least two electron transporting materials in the light-emitting layer decreases from a cathode side toward an anode side.

An organic light emitting device containing (i) a substrate; (ii) a first electrode, such as an anode; (iii) a mixed region comprising a mixture of a hole transport material and an electron transport material, and wherein this mixed region includes at least one organic luminescent material; (iv) a second electrode, such as a cathode; (v) a thermal protective element coated on the second electrode; wherein, one of the two said first and second electrodes is a hole injection anode, and one of the two electrodes is an electron injection cathode, and wherein the organic light emitting device further comprises; (vi) a hole transport region, interposed between the anode and the mixed region, wherein the hole transport region optionally includes a buffer layer; and (vii) an electron transport region interposed between the cathode and the mixed region.

An organic electroluminescent (EL) device which has a light emitting layer composed of at least one phosphorescent dopant disposed between a first electrode and a second electrode; and a blue light emitting layer contacting the light emitting layer, wherein the light emitting layer has a hole transport material and an electron transport material as a host.

A hole transporting region made of a hole transporting material, an electron transporting region made of an electron transporting material, and a mixed region (light emitting region) in which both the hole transporting material and the electron transporting material are mixed and which is doped with a triplet light emitting material for red color are provided in an organic compound film, whereby interfaces between respective layers which exist in a conventional lamination structure are eliminated, and respective functions of hole transportation, electron transportation, and light emission are exhibited. In accordance with the above-mentioned method, the organic light emitting element for red color can be obtained in which power consumption is low and a life thereof is long. Thus, the display device and the electric device are manufactured by using the organic light emitting element.

An OLED device includes an anode, a cathode, and at least one individually selected organic light-emitting layer disposed between the anode and cathode. The device also includes an electron-transporting layer disposed between the at least one light-emitting layer and the cathode, such electron-transporting layer including a first electron-transporting material, and an electron-injecting layer disposed between the electron-transporting layer and the cathode, such electron-injecting layer including a metal dopant having a work function less than 4.0 eV and an electron-transporting material that is different from the first electron-transporting material.

Interfaces between layers in a light emitting element are eliminated by using a light emitting element with a mixed region comprising a hole transporting material and an electron transporting material. The light emitting element may further comprise a region with a dopant. By using this light emitting element, an organic luminescent element of low power consumption and long life is achieved, and the light emitting element can be used to manufacture a luminescent device and an electric appliance.

A tandem OLED device includes an anode, a cathode, first and second electroluminescent units disposed between the anode and the cathode, and an intermediate connector disposed between the first and second electroluminescent units. Each of the electroluminescent units include at least one individually selected organic light-emitting layer, and the first electroluminescent unit includes a first electron-transporting layer disposed between the cathode and the light-emitting layer of the first electroluminescent unit, wherein the first electron-transporting layer includes a first electron-transporting material. The intermediate connector includes a first n-type doped organic layer disposed in contact with the first electron-transporting layer, and wherein the first n-type doped organic layer includes an n-type dopant and an electron-transporting material that is different from the first electron-transporting material.

The present invention is an organic light emitting device (OLED) comprising an anode, a cathode and a luminescent region provided between the anode and the cathode. The luminescent region comprises an electron injection and transporting zone and at least one of a hole injection and transporting zone and a mixed charge transport layer. One or both of the electron injection and transporting zone and the mixed charge transporting layer comprises an azole compound represented by formula I and / or II. The provision of the novel azole compounds of the invention as electron transport materials within an organic electroluminescent device advantageously reduces power consumption and increases power conversion efficiency within the device and as such, are suitable for a variety of display applications.

An organic light-emitting device (OLED) includes an anode, a cathode, and a light-emitting layer disposed between the anode and the cathode, wherein the light-emitting layer includes a dominant host and a dopant. The device also includes an electron-transporting layer disposed in direct contact with the light-emitting layer on the cathode side, wherein the electron-transporting layer includes an electron-transporting material having the same chromophore as that of the dominant host in the light-emitting layer, wherein the electron-transporting material constitutes more than 50% by volume of the electron-transporting layer, and wherein the electron-transporting material has a greater reduction potential than that of the dominant host in the light-emitting layer.

An organic electroluminescent device ( 20 ) including an anode ( 1 ), a first emitting layer ( 3 ), a carrier barrier layer ( 4 ), a second emitting layer ( 5 ), and a cathode ( 7 ) stacked in that order. The first emitting layer ( 3 ) is formed of a hole transporting material, and the second emitting layer ( 5 ) is formed of an electron transporting material. The affinity level of the carrier barrier layer ( 4 ) is smaller than the affinity level of the second emitting layer ( 5 ) in an amount of 0.2 eV or more, and the ionization potential (Ie1) of the carrier barrier layer ( 4 ) and the ionization potential (Ih1) of the first emitting layer ( 3 ) satisfy Ie1<Ih1+0.1 (eV) (1).

An organic electroluminescent device, including: a cathode; an anode; and organic layers including at least an emitting layer and an electron-transporting layer between the cathode and the anode, the electron-transporting material with the slowest electron mobility constituting the electron-transporting layer having an electron mobility of 2.0×10−5 cm2 / Vs or more in an electric field intensity of 0.4 to 0.5 MV / cm, the electron mobility / hole mobility (ΔEM) of a host material constituting the emitting layer, and the electron mobility / hole mobility (ΔET) of the electron-transporting material with the slowest electron mobility constituting the electron-transporting layer satisfying the following relationship: ΔET>1, 0.3≦ΔEM≦10, and ΔET>ΔEM.

An organic light-emitting diode (OLED) device which produces substantially white light includes an anode; a hole-transporting layer disposed over the anode; and a blue light-emitting layer having a host doped with a blue light-emitting compound disposed directly on the hole-transporting layer and the blue light-emitting layer being doped with an electron-transporting or a hole-transporting material or both selected to improve efficiency and operational stability. The device also includes an electron-transporting layer disposed over the blue light-emitting layer; a cathode disposed over the electron-transporting layer; and the hole-transporting layer or electron-transporting layer, or both the hole-transporting layer and electron-transporting layer, being selectively doped with a compound which emits light in the yellow region of the spectrum which corresponds to an entire layer or a partial portion of a layer in contact with the blue light-emitting layer.

Organic electroluminescent device (100) having a multilayer structure including at least emitting layer (15) and electron-transporting layer (16) between cathodes (17) and (18) and anode (12), the triplet energy gap (EgT) of a host material forming emitting layer (15) being 2.52 eV or more and 3.7 eV or less, an electron-transporting material forming electron-transporting layer (16) being different from the host material, and having hole-transporting properties, and emitting layer (15) including a phosphorescent metal complex compound containing a heavy metal.

The invention relates to a method for improving the performance of a light absorption layer of a perovskite solar cell. The method includes the steps that an additive is added into a reactant of perovskite to form a perovskite precursor solution; then a base coated with an electron transport material or a hole transport material is coated with the precursor solution in a rotating mode, and a perovskite light absorption layer film is formed after thermal treatment. The additive comprises one or more of CnH2n+1NH3B and an AB compound, wherein n is equal to 0-3, A is selected from monovalent metal, and B is F or C1 or Br or I. The light absorption layer, prepared through the method, of the perovskite solar cell enables the battery efficiency to be increased to over 10 percent from less than 6 percent. The method is simple and effective, simplifies the preparation process, and can save production cost. Therefore, the method for improving the performance of the light absorption layer of the perovskite solar cell has extremely high industrial application value.

Disclosed is a novel compound suitable as an electron transporting material for organic electronic devices. Also disclosed is an organic electronic device using such a compound which has higher sensitivity and longer life than conventional organic electronic devices. Specifically disclosed is a compound having a structure wherein structural units represented by the general formula (1) below are bonded to one another without a linking group, wherein, in the formula, X1 to X4 independently represent an oxygen atom, a sulfur atom or NR0 (wherein R0 represents a hydrogen atom, or a substituted or unsubstituted monovalent organic group); Z0 represents a tetravalent organic group; and * represents a bonding position.

An organic EL device includes a pair of electrodes, a light emitter layer obtained by mixing a hole transporting material made of a tertiary amine compound, an electron transporting material and a light emitting additive. The tertiary amine compound constituting the hole transporting material has only one oxidation potential as measured by the cyclic voltammetry. A difference in ionization potential between the hole transporting material and electron transporting material of the light emitter layer is 0.35 eV or greater.

A novel organic compound that can be used as an electron-injection material or an electron-transport material of a light-emitting element is provided. An organic compound with which a display device having less crosstalk can be obtained is provided. A light-emitting device, a display device, and an electronic device each having less crosstalk are provided. An organic compound including two or three benzo[h]quinazoline rings is provided. In the organic compound, two or three benzo[h]quinazoline rings are preferably included in the substituent including an aromatic ring or a heteroaromatic ring and having 3 to 30 carbon atoms. When two or three benzo[h]quinazoline rings are included in a substituent particularly including a heteroaromatic ring and having 3 to 30 carbon atoms, a high electron-transport property can be obtained.