75results about How to "Excellent hole injection" patented technology

A light-emitting device comprises a light-emitting member, which comprises two electrodes and an organic electroluminescent material disposed between the electrodes, and at least one organic photoluminescent ("PL") material. The light-emitting member emits light having a first spectrum in response to a voltage applied across the two electrodes. The organic PL material absorbs a portion of the light emitted by the light-emitting member and emits light having second spectrum different than the first spectrum. The light-emitting device can include an inorganic PL material that absorbs another portion of the light emitted from the light-emitting member and emits light having a third spectrum different than both the first and the second spectra.

The organic electroluminescence element includes an anode metal layer above a substrate. The anode metal layer comprises an inner region and an outer region. The inner region is adjacent to and different than the outer region. An upper surface of the inner region is lower than an upper surface of the outer region. A metal oxide layer is on the inner region of the metal anode layer. A hole transport layer is above the metal oxide layer and the inner region. The hole transport layer comprises a hole-transporting organic material. An organic luminescent layer is above the hole transport layer and the inner region. A cathode layer is above the organic luminescent layer and the inner region. The cathode layer injects electrons into the organic luminescent layer. An insulating layer is above the outer region of the anode metal layer.

Hole transport layer compositions comprising a silylated aryl amine and a polymeric component, to enhance performance of an associated electroluminescent device.

Provided are an organic light emitting device (OLED) comprising: a first electrode; a second electrode; a hole injection layer (HIL), a hole transporting layer (HTL), and an emitting layer sequentially formed between the first electrode and the second electrode, wherein the work function, the IP or the absolute value of the highest occupied molecular orbital (HOMO) level of the HIL is greater than or equal to the absolute value of HOMO level of the HTL. In the OLED, the energy relationships between organic layers are controlled to facilitate hole injection and optimize the charge balance. Thus the efficiency of the OLED improves and the lifetime of the OLED increases.

It is an object of the present invention to provide a material which is excellent in a hole injecting property and a hole transporting property, and to provide a light emitting element and a light emitting device using a material which is excellent in a hole injecting property and a hole transporting property. The present invention provides a carbazol derivative represented by a general formula (1). The carbazol derivative according to the present invention is excellent in the hole injecting property. By using the carbazol derivative according to the present invention as a hole injecting material for a hole injecting layer of a light emitting element, a driving voltage can be reduced. In addition, a lower driving voltage, improvement of the luminous efficiency, a longer life time, and higher reliability can be realized by applying the material to a light emitting element or a light emitting device.

A substance that facilitates hole injection and has high triplet excitation energy is provided. A light-emitting element having high emission efficiency is provided. A light-emitting element driven with a low voltage is provided. Or a light-emitting element having a long lifetime is provided. Provided is a light-emitting element including a triazolo[4,3-f]phenanthridine derivative or a triazolo[3,4-a]isoquinoline derivative. Provided is a triazolo[4,3-f]phenanthridine and triazolo[3,4-a]isoquinoline derivatives, which are novel and can be used for the light-emitting element.

It is an object of the present invention to provide an arylamine compound which has resistance to repeated oxidation reactions. The present invention provides a secondary arylamine compound represented by General Formula 1.

(In the formula, Ar¹¹ is an aryl group having 7 to 25 carbon atoms or a heteroaryl group having 7 to 25 carbon atoms. Ar¹² and Ar¹³ may be identical or different, and are individually either an aryl group having 6 to 25 carbon atoms or a heteroaryl group having 5 to 9 carbon atoms. X is either a bivalent aromatic hydrocarbon group having 6 to 25 carbon atoms or a bivalent heterocyclic group having 5 to 10 carbon atoms.)

The invention discloses an organic LED by adopting doped metallic oxide as a hole injection structure, which comprises a transparent anode, an organic hole injection layer, an organic hole transmission layer, an organic luminescent layer, an organic electronic transmission layer and a cathode; wherein the organic hole injection layer is deposited on the transparent anode and the area of the organic hole injection layer is smaller than that of the transparent anode; the organic hole injection transmission layer is deposited on the organic hole injection layer; the organic luminescent layer is deposited on the organic hole injection transmission layer; the electronic transmission layer is deposited on the organic luminescent layer; the cathode is deposited on the organic electronic transmission layer and the area of the cathode is smaller than that of the organic electronic transmission layer.

Provided are a light-emitting element capable of reducing power consumption by increasing its light extraction efficiency and a light-emitting device using the light-emitting element. A light-emitting element includes a composite material, which contains an organic compound having a high hole-transport property and an electron acceptor and in which the spin density measured by an electron spin resonance (ESR) method is less than or equal to 1×10¹⁹ spins/cm³, the spin density is less than or equal to 3×10¹⁹ spins/cm³ when the molar ratio of the electron acceptor to the organic compound is greater than or equal to 1, or the spin density is less than or equal to 5×10¹⁹ spins/cm³ when the molar ratio is greater than or equal to 2.

A high molecular weight compound according to the present invention includes a substituted triarylamine structural unit represented by a general formula (1) below,

The invention provides an organic electroluminescence device and a manufacturing method thereof. The organic electroluminescence device comprises a conductive anode substrate, a hole injection layer, a hole transmission layer, a light emitting layer, an electron transmission layer, an electron injection layer and a cathode which are stacked sequentially, wherein the hole injection layer is made of a mixture of rhenium oxide and zinc oxide, the hole injection layer further contains the binder polytetrafluoroethylene, the hole injection layer is of a nanometer netty structure, and the bore diameter of the nanometer netty structure is 100 nm - 150 nm. According to the organic electroluminescence device, the hole transmission layer is manufactured through mixture of rhenium oxide, azo substances, zinc oxide and polytetrafluoroethylene, the binder polytetrafluoroethylene enables the cohesiveness between the hole injection layer and adjacent layers to be improved, decomposition of the azo substances enables the nanometer netty structure of the hole injection layer to be formed, the hole transmission rate and the photoelectric conversion efficiency of the device can be improved, the manufacturing method is simple, and application prospects are good.

A conjugated or partially conjugated polymer including a structural unit of Formula (I); where T is an aryl or heteroaryl group that may be substituted or unsubstituted, or a C1-C24 alkyl group; R1 is alkyl, alkoxy, aryl group, cyano, or F; and a and b are independently selected from 1, 2 or 3. In addition, a composition of Formula (IV); wherein X is a halogen or a boronate group.

The invention discloses an undoped red organic electroluminescent material and a preparation method and applications thereof, wherein the material is a compound with a symmetrical star-like push and pull electronic structure and consists of a triazine group and three phenothiazine groups the N positions of which are connected with alkyls. The material comprises three intramolecular charge transferchannels, thus improving the carrier transmission capability thereof; and the symmetrical star-like structure formed by three dipole moments reduces the intramolecular dipole-dipole mutual effect andeffectively prevents the fluorescent quenching caused by intramolecular cluster. The compound has simple preparation method and low material cost, is easily dissolved in common organic solvents and applicable for being prepared into films by using the spin coating method with lower cost, and is beneficial for the carrier balance in the device and the device efficiency improvement as the compoundcontains the phenothiazine group with hole-transmission capability and the triazine group with teleportation capability when the compound is taken as the light-emitting layer materiel of the undoped red organic electroluminescent devices.

A flexible organic electroluminescent device and a manufacturing method thereof are provided. The device comprises a substrate (101), an anode layer (103), a hole-injecting layer (104), a hole-transporting layer (105), a light-emitting layer (106), an electron-transporting layer (107), an electron-injecting layer (108), and a cathode layer (109), which are stacked in order. The device further comprises a buffer layer (102) between the substrate (101) and the anode layer (103). The anode layer (103) is a multilayer composite structure, which comprises ZnS/Ag/MoO₃. The bonding force between the anode layer (103) and the substrate (101) is enhanced by inserting buffer layer (102). The device has a good bending endurance performance, a stable luminous property and a high light emitting efficiency.

A high molecular weight compound according to the present invention includes a substituted triarylamine structural unit represented by the following general formula (1),

Hole transport layer compositions comprising a silylated aryl amine and a polymeric component, to enhance performance of an associated electroluminescent device.

The invention provides an organic photoelectric device containing oxathiocyclic triarylamine compounds and an application thereof. The organic photoelectric device comprises an organic light-emittingdevice (OLED), an organic field effect transistor (OFET), organic solar cells and the like. Particularly, the hole injection layer, the hole transport layer, the electron blocking layer or the luminous layer in the OLED contain the oxathiocyclic triarylamine compounds. Since the oxathiocyclic triarylamine compound has excellent energy level matching property and high glass-transition temperature,the compound has fairly good thermal and optical stability and triplet state energy level so as to meet the exciton binding requirement. Therefore, the OLED has the advantages of high efficiency, lowoperating voltage and long service life and has excellent application prospects.

The invention relates to a QLED device and a preparation method thereof. The QLED device comprises a substrate, an anode, a hole injection layer, an inorganic semiconductor layer, a quantum dot light-emitting layer, an electron injection layer and a cathode which are sequentially arranged in a laminated manner, wherein the hole injection layer is made of metal oxide nanoparticles. The QLED deviceadopts the metal oxide nano to serve as the hole injection layer and introduces an inorganic semiconductor film with the same composition as a quantum dot shell layer between the quantum dot light-emitting layer and the hole transport layer at the same time, thereby ensuring good hole injection performance between the inorganic semiconductor layer and the quantum dot light-emitting layer, and thuseffectively improving the injection transport from the hole injection layer to the inorganic semiconductor film. The stability of the device can be effectively improved by adopting an all-inorganic material to prepare a quantum dot light-emitting diode.

A red electroluminescent material containing furan is characterized by having a structure represented as a formula (I), wherein M is Ir, Eu or Os, and m is 1-3; L is a bidentate chelation assisted ligand containing C and N or C and O; R1-R8 are H, D, F as well as alkyl, alkoxy, fluoroalkyl, silicyl, naphthenic base, cycloalkoxy, -CN and -NO2 with carbon number lower than 12, or are phenyl, alkyl substituted phenyl, thienyl, alkyl substituted thienyl, furyl, alkyl substituted furyl, fluorenyl, alkyl substituted fluorenyl, carbazolyl and alkyl substituted carbazolyl; in (R4)y, y ranges from 1 to 3, X is O, S, Se and Si, and n ranges from 0 to 7.

The invention relates to a compound, application thereof and an organic light-emitting device adopting the compound. The novel organic compound has a structure shown in the following I: L1, L2 and L3are independently selected from a single bond, a substituted or unsubstituted C6-C30 arylene group and a substituted or unsubstituted C6-C30 heteroarylene group; Ar1, Ar2 and Ar3 are independently selected from the group consisting of an ether group of C1-C6, a substituted or unsubstituted aryl group of C6-C30, and a substituted or unsubstituted heteroaryl group of C6-C30 respectively; R1 is selected from H, an alkyl group of C1-C20, an alkoxy group of C1-C12, a cycloalkyl group of C3-C20, a C1-C6 ether group, a substituted or unsubstituted aryl group of C6-C30, a substituted or unsubstitutedheterocycloalkyl group of C2-C30, and a substituted or unsubstituted heteroaryl group of C6-C30. When the compound provided by the invention is used as a hole injection material in an OLED device, excellent device performance and stability are shown. The invention also discloses an organic light-emitting device adopting the compound with the general formula.

The invention discloses a single anthracene derivative blue electroluminescence material, as well as a preparation method and application in preparing electroluminescence devices. Due to the excellent hole injection and transmission capability of triphenylamine groups, the invention obtains a derivative series blue electroluminescence material based on 9-(4-dianiline phenyl) anthracene by virtue of the preparation method of changing substituent and synthesizing intermediate compounds in advance and applies the material to preparing a blue electroluminescence device with excellent luminous performance.