Canon Kabushiki Kaisha

Manabu Furugori

Shinjiro Okada

Takao Takiguchi

Akira Tsuboyama

Jun Kamatani

Takashi Moriyama

Seishi Miura

Satoshi Igawa

Koji Noguchi

Hironobu Iwawaki

Hidemasa Mizutani

Kengo Kishino

Masashi Hashimoto

Kazunori Ueno

Jian Chen

Katsuaki Kuge

Minako Kurokawa

Takao Takuguchi

A metal coordination compound represented by the formula: An organic luminescence device including an anode, a cathode, and an organic layer, which contains the metal coordination compound, disposed between the anode and the cathode.

Luminescence device and display apparatus

A light emitting device having an anode and a cathode provided on a substrate, and an organic light emitting layer between the anode and the cathode, where the organic light emitting layer includes a light emitting material and first and second dopants for improving the dispersability thereof. As the first dopant, there is employed a phosphorescent dopant. The amount of the second dopant is greater than the amount of the first dopant.

Light emitting device having dopants in a light emitting layer

The present invention provides a luminescent device using a luminescent material which has high luminescence efficiency and high stability, and is available at a low cost. The luminescent device is characterized in that as a luminescent material is used a binuclear copper coordination compound having a partial structure represented by the general formula (1): Cu-A-Cu, wherein Cu is a copper ion and A is a bidentate ligand.

Luminescent device

A light emitting device having an anode and a cathode provided on a substrate, and an organic light emitting layer between the anode and the cathode, where the organic light emitting layer includes a light emitting material and first and second dopants for improving the dispersability thereof. The first and second dopants are metal organic complex compounds having the same central metal, and the second dopant transmitting energy to the first dopant.

An organic electroluminescent (EL) element array includes a substrate, a first organic EL element emitting red light, a second organic EL element emitting green light, and a third organic EL element emitting blue light. The first, second, and third organic EL elements each include a first electrode, an organic compound layer, and a light-transmissive second electrode arranged on the substrate in that order. The second electrode of the first organic EL element has a semitransparent reflective layer. The first electrode of the first organic EL element has a reflective face and a resonant structure located between the reflective face and the semitransparent reflective layer. The second and third organic EL elements each has a resonant structure located between a reflective face of the first electrode of the second or third organic EL element and a light-extracting face of the transparent layer of the second or third organic EL element.

Organic electroluminescent element array

A light emitting device having an anode and a cathode provided on a substrate, and an organic light emitting layer between the anode and the cathode, where the organic light emitting layer includes a light emitting material and first and second dopants for improving the dispersability thereof. The first and second dopants are metal organic complex compounds having the same ligand skeletal structures.

The present invention provides a light-emitting device which can be driven at a low voltage and has high luminance, high efficiency, and has a long lifetime even as an organic EL device using phosphorescence. The light-emitting device of the present invention is a light-emitting device including an anode, a cathode, and an organic light-emitting layer sandwiched between the anode and the cathode, in which the organic light-emitting layer is composed of a host material and one or more kinds of dopants, a difference in electron affinity between the host material and at least one kind of the dopants is 0.3 eV or less, and a difference in ionization potential between the host material and the at least one kind of the dopants is 0.8 eV or less.

Light-emitting device

A metal coordination compound having the following structure:  

A luminescence device having a layer containing a metal coordination compound which has a partial structure. MLof formula (2) below and is preferably entirely represented by formula (3) below:MLL'&#x2003;&#x2003;(3)wherein M denotes a metal atom of Ir, Pt, Rh or Pd; represent mutually different bidentate ligands; m is 1 or 2 or 3; n is 0 or 1 or 2 with the proviso that m+n=2 or 3; the partial structure MLis represented by formula (2) below (wherein B is an isoquinolyl group bonded to the metal M with its N and including a position-1 carbon atom bonded to a cyclic group A which includes the C bonded to the metal M), and the partial structure ML&#x2032;is represented by formula (4), (5) or (6) shown below. There is provided a luminescence device capable of high-efficiency luminescence and long-term high luminance and adapted to red luminescence. 

A luminescence device comprising a pair of electrodes and an organic compound layer disposed between the electrodes. The layer contains a metal coordination compound represented by the following formula (1): 

Luminescence device, display apparatus and metal coordination compound

A metal coordination compound having a structure according to formula (1) or (3), wherein ligand L is a phenylisoquinoline ligand and ligand L2 is different from L: A luminescence device and a display apparatus using this metal coordination compound are provided.

A novel phenanthroline compound is provided which is suitable as a compound for an organic EL device and is represented by the general formula (I):  

Phenanthroline compound and light-emitting device

A light emitting device having an anode and a cathode provided on a substrate, and an organic light emitting layer between the anode and the cathode, where the organic light emitting layer includes a light emitting material and a dopant for improving the dispersability thereof. As the dopant, there are employed a light emitting compound and a non-light emitting compound or a current enhancing material. In case of employing the light emitting compound, the composition corresponds to a case of utilizing plural light emitting materials, and, in such case, the light emission wavelengths are preferably mutually closer. Also, evaporation of the light emitting material and the dopant in the same evaporation boat makes it possible to reduce evaporation temperature, thereby improving the dispersability of the light emitting material.

OLED provided with organic layer comprising first and second dopants based on iridium organic complex compounds

There is provided an organic light-emitting device obtained by using a specific copper coordination compound as a light-emitting material, which has a basic structure in which two copper ions are crosslinked in a ring form by one of atomic groups containing a halogen atom, a sulfur atom, and an nitrogen atom. The light-emitting device provides high luminescence efficiency and high stability at low cost by using an inexpensive copper coordination compound as a light-emitting material.

The object of the present invention is to provide a light-emitting device that emits phosphorescence with high efficiency. The light-emitting device of the present invention includes a host containing two kinds of dopants, wherein a dopant having a longer maximum-emission wavelength is doped in a low concentration and has a substituent.

Growing community of inventors

Atsugi, Japan

Manabu Furugori