Panasonic Corporation

Joled Inc.

Matsushita Electric Industrial Co., Ltd.

Panasonic Intellectual Property Management Co., Ltd.

Sumitomo Chemical Company, Limited

Shinichiro Ishino

Koyo Sakamoto

Kaname Mizokami

Noriyuki Matsusue

Tomoki Masuda

Yoshinao Ooe

Hirotaka Nanno

Yuko Kawanami

Yuichiro Miyamae

Tomohiko Oda

Hideji Kawarazaki

Yasuhiro Yamauchi

Akira Shiokawa

Keisuke Sumida

Morio Fujitani

Kazuo Uetani

Hiroyuki Kado

Tatsuo Mifune

Hiroyuki Tachibana

Mineki Hasegawa

Yasuhiro Sekimoto

Muneharu Sato

Mikihiko Nishitani

Masaharu Terauchi

Takuji Tsujita

Masakazu Takata

Haruka Kusukame

Toshiyuki Akiyama

Yusuke Fukui

Keiko Kurata

Michiko Okafuji

Yoshie Takahashi

Shinya Nakashima

Mituru Harada

Tetsuro Kondoh

Ryoichi Inoue

Kenichi Kusaka

Hiroyuki Kadou

An organic electroluminescence element including an anode, a light-emitting layer, a functional layer, and a cathode stacked in this order. The light-emitting layer and the functional layer are in contact with each other. Hole mobility of the light-emitting layer is greater than electron mobility of the light-emitting layer. The electron mobility of the light-emitting layer is equal to or greater than an effective electron mobility of the functional layer. A highest occupied molecular orbital (HOMO) level of a first functional material included in the light-emitting layer is at least 0.4 eV greater than a HOMO level of a second functional material included in the functional layer.

Organic el element, and organic el display panel including light- emitting layer and functional layer with specific hole and electron mobilities relationship

According to one embodiment, a solution for organic EL contains a mixed solvent of two or more kinds of organic solvents which contain at least a first organic solvent and a second organic solvent, and an organic EL contributing material dissolved into the mixed solvent. The coordinates (HSP coordinates) specified by Hansen solubility parameters of the first organic solvent are Hd in a range of 17.5 to 19.5 (J/cm), Hp in a range of 3.5 to 5.5 (J/cm)and Hh in a range of 3.5 to 5.5 (J/cm). The HSP coordinates of the second organic solvent are Hd in a range of 17.5 to 19.5 (J/cm), Hp in a range of 0 to 2.0 (J/cm), and Hh in a range of 0.5 to 2.5 (J/cm).

Solution for organic EL, method of producing organic EL device and organic EL  device

Disclosed is a method for manufacturing an organic EL display panel in which a plurality of organic electroluminescence elements each including an organic layer are arranged on an upper side of a substrate. The method includes applying an ink obtained by dissolving or dispersing an organic material in a solvent to a preset application area over the substrate, and cooling the ink applied in the applying within a period until the ink is dried, to lower an ink temperature to a second temperature lower than a first temperature of the ink at a time of application thereof.

Method and apparatus for manufacturing organic el display panel

According to one embodiment, an ink for organic EL includes an organic EL contributing material and an organic solvent. A relative energy difference RED based on Hansen solubility parameters which attribute to the organic EL contributing material and the organic solvent, respectively, is less than 0.5.

Ink for organic EL

A method of producing an organic electroluminescent ink includes reducing ozone contained in an organic electroluminescent mixture comprising an organic electroluminescent material and a solvent.

Method of producing organic EL ink and method of manufacturing organic EL device

Each of blue light emitting elements includes: a photoanode; a translucent cathode; an organic light emitting layer between the photoanode and the translucent cathode; a first functional layer between the organic light emitting layer and the photoanode; and a second functional layer between the organic light emitting layer and the translucent cathode, and has a resonator structure. The first functional layer has an optical film thickness of 48-62 nm. The translucent cathode is a stack of a first translucent conductive layer, a metal layer, and a second translucent conductive layer stacked in this order from the second functional layer side. The first translucent conductive layer has a refractivity of 2.0-2.4, and a film thickness of 85-97 nm. The metal layer has a refractivity different by 0 to 2.0 from that of the first translucent conductive layer, and has a film thickness of 2-22 nm.

Organic light emitting element with increased efficiency of extracting blue light

An ink jet device includes a plurality of ink jet heads each including an ink housing unit that houses therein ink, a pressure application unit that ejects a droplet of the ink by applying pressure to the ink, and a nozzle through which the droplet of the ink is ejected, wherein with respect to at least one of the plurality of ink jet heads, a preliminary drive operation and a main drive operation are performed, the preliminary drive operation is an operation of pushing the ink toward an outer edge of the nozzle to the extent that the droplet of the ink is not ejected through the nozzle, and the main drive operation is an operation of ejecting the droplet of the ink through the nozzle after performance of the preliminary drive operation.

Inkjet device, and method for manufacturing organic EL device

To provide a method of efficiently manufacturing an organic light-emitting element with excellent light-emitting characteristics by application, the method includes: preparing ink and filling an inkjet device having an ink ejection nozzle with the ink; preparing a substrate having a base layer including a first electrode; and positioning the inkjet device above the substrate, and causing the inkjet device to eject a drop of the ink onto the base layer, wherein, in the preparation of the ink, a value Z denoting a reciprocal of the Ohnesorge number Oh determined by density &#x3c1; (g/dm), surface tension &#x3b3; (mN/m), and viscosity &#x3b7; (mPa&#xb7;s) of the ink and a diameter r (mm) of the ink ejection nozzle satisfies Formula 1, in the ejection of the drop of the ink, speed V (m/s) of the ejected drop satisfies Formula 2, and the value Z and the speed V (m/s) satisfy Formula 3.

Method for producing organic light-emitting element, organic display panel, organic light-emitting device, method for forming functional layer, ink, substrate, organic light-emitting element, organic display device, and inkjet device

A method of efficiently manufacturing an organic light-emitting element with excellent light-emitting characteristics is provided. The method includes: preparing ink and filling an inkjet device having an ink ejection nozzle with the ink; preparing a substrate having a base layer including a first electrode; positioning the inkjet device above the substrate; and causing the inkjet device to eject a drop of the ink onto the base layer. In the preparation of the ink, a value Z denoting a reciprocal of the Ohnesorge number Oh determined by density &#x3c1; (g/dm), surface tension &#x3b3; (mN/m), and viscosity &#x3b7; (mPa&#xb7;s) of the ink and a diameter r (mm) of the ink ejection nozzle satisfies Formula 1, in the ejection of the drop of the ink, speed V (m/s) of the ejected drop satisfies Formula 2, and the value Z and the speed V (m/s) satisfy Formula 3.

To provide a method of efficiently manufacturing an organic light-emitting element with excellent light-emitting characteristics by application, the method includes: preparing ink and filling an inkjet device having an ink ejection nozzle with ink; preparing a substrate having a base layer including a first electrode; and positioning the inkjet device above the substrate, and causing the inkjet device to eject a drop of the ink onto the base layer, wherein, in the preparation of the ink, a value Z denoting a reciprocal of the Ohnesorge number Oh determined by density &#x3c1; (g/dm), surface tension &#x3b3; (mN/m), and viscosity &#x3b7; (mPa&#xb7;s) of the ink and a diameter r (mm) of the ink ejection nozzle satisfies Formula 1, in the ejection of the drop of the ink, speed V (m/s) of the ejected drop satisfies Formula 2, and the value Z and the speed V (m/s) satisfy Formula 3.

A manufacturing method including: forming a first electrode; forming a first bank; forming a first organic functional film; forming a second bank; forming a second organic functional film; and forming a second electrode. In the forming of the second bank, the second bank is formed such that, in plan view, a bottom edge of a sidewall surface of the second bank facing the second aperture is located at the same position as or is set back from a bottom edge of a sidewall surface of the first bank facing the first aperture. In the forming of the second organic functional film, the droplet of the second ink is applied such that an upper edge of the second organic functional film within the second aperture is located at a same level as or at a higher level than the bottom edge of the sidewall surface of the second bank.

Organic electronic device manufacturing method and organic EL device manufacturing method

An ink for an organic light-emitting element includes a first solvent, a second solvent, and a functional material. The first and second solvents have equal or similar boiling points. The first solvent is such that an imitatively formed functional layer formed by replacing the second solvent with the first solvent, in a light-emitting region of an organic light-emitting element, is thicker at both end portions than at a central portion and the top surfaces of the end portions are positioned higher than the top surface of the central portion. The second solvent is such that an imitatively formed functional layer formed by replacing the first solvent with the second solvent, in a light-emitting region of an organic light-emitting element, is thicker at a central portion than at both end portions and the top surface of the central portion is positioned higher than the top surfaces of the end portions.

Ink for organic light-emitting element and a method for producing the same

To provide a method of efficiently manufacturing an organic light-emitting element with excellent light-emitting characteristics by application, the method includes: preparing ink and filling an inkjet device having an ink ejection nozzle with the ink; preparing a substrate having a base layer including a first electrode; and positioning the inkjet device above the substrate, and causing the inkjet device to eject a drop of the ink onto the base layer, wherein, in the preparation of the ink, a value Z denoting a reciprocal of the Ohnesorge number Oh determined by density &#x3c1; (g/m), surface tension &#x3b3; (mN&#xb7;m), and viscosity &#x3b7; (mPa&#xb7;s) of the ink and a diameter r (mm) of the ink ejection nozzle satisfies Formula 1, in the ejection of the drop of the ink, speed V (m/s) of the ejected drop satisfies Formula 2, and the value Z and the speed V (m/s) satisfy Formula 3.

A functional layer of an organic light-emitting element is formed by using an ink including a first solvent and a second solvent having equal or similar boiling points, and a functional material. The first solvent is such that an imitatively formed functional layer formed by replacing the second solvent with the first solvent, in a light-emitting region of an organic light-emitting element, is thicker at both end portions than at a central portion and top surfaces of the end portions are positioned higher than a top surface of the central portion. The second solvent is such that an imitatively formed functional layer formed by replacing the first solvent with the second solvent, in a light-emitting region of an organic light-emitting element, is thicker at a central portion than at both end portions and a top surface of the central portion is positioned higher than top surfaces of the end portions.

Method for manufacturing organic light-emitting element, organic light-emitting element, organic display device, organic light-emitting device, method for forming functional layer, functional member, display device, and light-emitting device

An ink for an organic electroluminescent device includes a functional material, a first solvent, a second solvent, and a third solvent. The functional material is for forming a functional layer of the organic electroluminescent device. The first solvent is for dissolving the functional material. The second solvent has a diester backbone and a second boiling point that is at most equal to a first boiling point of the first solvent or greater than the first boiling point of the first solvent by at most 20&#xb0; C. The third solvent is an aliphatic alcohol and has a third boiling point that is less than the first boiling point of the first solvent and less than the second boiling point of the second solvent.

Ink for organic electroluminescent device, manufacturing method of organic electroluminescent device, organic display panel, organic display apparatus, organic electroluminescent apparatus, ink, forming method of functional layer, and organic electroluminescent device

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Osaka, Japan

Shinichiro Ishino