91results about How to "Long drive life" patented technology

The present invention relates to novel organic electroluminescent compounds and an organic electroluminescent device containing the same. The organic electroluminescent compounds according to the present invention can be used as a phosphorescent host material, a hole transport material, or a mixed host material; have a good hole transport ability; prevent crystallization in the production of the device; are suitable for forming a layer; and improve the current density of the device thereby reducing the driving voltage of the device.

An apparatus comprising a magnetic media and a read / write unit. The magnetic media may be configured to store data. The magnetic media may also be rotated during access of the magnetic media. The read / write unit may comprise a plurality of transducers arranged in a linear array. Each of the transducers may be fabricated on a semiconductor substrate with fixed head positions with respect to the magnetic media. The read / write unit may also be positioned in close proximity to and across the surface of the magnetic media. Each transducer may be configured to read data from the magnetic media and write data to the magnetic media.

Disclosed is an organic electroluminescent device (organic EL device) that is improved in luminous efficiency, sufficiently secures driving stability, and has a simple configuration. This organic EL device has a light-emitting layer between an anode and a cathode piled one upon another on a substrate and the said light-emitting layer contains a fused polycyclic compound in which seven or more rings are fused together as a host material. The aforementioned fused polycyclic compound has a structure formed by fusing two or more indole rings to a carbazole ring. A specific example thereof is the compound represented by the following formula.

The present invention relates to a novel organic electroluminescent compound and an organic electroluminescent device comprising the same. The organic electroluminescent compound according to the present invention can be used in a light-emitting layer and has excellent luminescent efficiency; and an organic electroluminescent device comprising the organic electroluminescent compounds of the present invention has long lifespan, and improved current efficiency and power efficiency.

A method for starting up a wind energy plant after an operation stoppage, wherein the wind energy plant has a gearbox in the drive train and an operation management which can control at least one operational variable significant for the strain of the gearbox B of the wind energy plant to a desired value BSoll, wherein after the operation stoppage, the desired value BSoll is limited by a maximum value BMax, which is preset depending on a measured temperature of a gearbox component and / or of a lubricant for the gearbox.

Provided is a compound which can form a film by a wet film-formation method and which permits a low heating temperature in forming a film. The film obtained using the compound has high film stability and can be laminated with other layer by a wet film-formation method or the like. The compound is useful as a material for electronic devices, and the electronic devices using same suffer from little lowering in charge transport efficiency or light emission efficiency and have excellent drive stability. Specifically provided are: a compound and a polymer which are characterized by bearing a leaving group having a specific structure; and an organic compound which is characterized by bearing a leaving group exhibiting a low leaving temperature.

Disclosed is an organic electroluminescent element which has a light-emitting layer produced by a wet film formation method and containing an arylamine compound, and which has a long operation life. Also disclosed are an organic EL display and an organic EL lighting, each of which comprises the organic electroluminescent element. Further disclosed is a process for manufacturing an organic electroluminescent element which has a light-emitting layer produced by a wet film formation method and containing an arylamine compound, and which has a long operation life. The organic electroluminescent element is characterized by comprising a first electrode, a second electrode formed so as to face the first electrode, and a light-emitting layer intercalated between the first electrode and the second electrode, wherein the light-emitting layer is a layer containing an arylamine compound, and the light-emitting layer is formed by a wet film formation method under such conditions that a light having a wavelength shorter than 500 nm is blocked.

Disclosed is an organic electroluminescent device (organic EL device) that is improved in luminous efficiency, sufficiently secures driving stability, and has a simple configuration. This organic EL device is constituted of an anode, organic layers comprising a phosphorescent light-emitting layer, and a cathode piled one upon another on a substrate and at least one organic layer selected from a light-emitting layer, an electron-transporting layer, and a hole-blocking layer contains an indolocarbazole compound represented by general formula (1). In the case where the indolocarbazole compound is incorporated in the light-emitting layer containing a phosphorescent dopant and a host material, it is incorporated as the host material. Some of such indolocarbazole compounds are represented by the following formula (2): wherein each of A1 and A2 is an aromatic hydrocarbon group; each of B1 and B2 is an aromatic heterocyclic group; each of R1 to R3 is a hydrogen atom, an alkyl group, a cycloalkyl group, an aromatic hydrocarbon group, or an aromatic heterocyclic group; m is an integer of 1 to 3; and n is an integer of 0 to 3.

Disclosed are: an organic electroluminescent element (organic EL element) which has a simple configuration and improved luminous efficiency, while ensuring sufficient driving stability; and a material for organic EL elements. This material for organic EL elements is a carborane compound which has one or more carborane rings and one or more dibenzothiophene rings, and wherein at least one dibenzothiophene ring has a structure that is bonded with a carborane ring at the 1-position, the 2-position or the 3-position. This organic EL element comprises organic layers between a positive electrode and a negative electrode which are laminated on a substrate, and at least one of the organic layers contains the above-described carborane compound.

The purpose of the present invention is to provide: an iridium complex compound which emits red light; a composition which contains the iridium complex compound and a solvent; an organic electroluminescent element which is produced using the compound or the composition and has a long service life and excellent electrical durability; and a display device and a lighting device, each of which uses the organic electroluminescent element. The present invention relates to an iridium complex compound which has a 2-phenyl quinazoline skeleton and a specific substituent.