Sumitomo Chemical Company, Limited

Sumitomo Chemical Company, Limtied

Cambridge Display Teclmology Limited

Cambridge Display Technology Limited

Makoto Anryu

Toshiaki Sasada

Daisuke Fukushima

Takakazu Saito

Takanobu Noguchi

Tomoyuki Suzuki

Takeshi Yamada

Nobuhiko Akino

Satoshi Kobayashi

Kazuei Ohuchi

Kohei Asada

Mika Shirasaki

Hiroyuki Hayasaka

Takashi Kuragano

Seiichirou Yokoya

Yasunori Uetani

Hideyuki Higashimura

Chizu Sekine

Martin Humphries

Shigeru Sasaki

Yoshiaki Tsubata

Annette Steudel

Kiran Timothy Kamtekar

Yoshihiro Kawada

Hidenobu Kakimoto

Tomoyasu Yoshida

Ruth Pegington

Sophie Barbara Heidenhain

Satoshi Mikami

Jun Oguma

Katsumi Agata

Rei Okamura

Akihiko Okada

Elena Hojas Garcia

Annette Regine Steudel

Yoshiaki Tubata

Sophie Heidenhain

Martin John Humphries

Makoto Kitano

Yoshiaki 3050045 Tsubata

A method of producing a film having excellent external quantum efficiency when used in a light emitting layer of a light emitting device is provided. A method of film production includes preparing an ink containing a specific metal complex, storing the ink for 3 days or more under light shielding, and forming a film by using the stored ink. The total content of metal complexes having a molecular weight larger by 16, 32 or 48 than that of the specific metal complex according to an area percentage value determined by liquid chromatography is 0.6 or less when the content of the specific metal complex is taken as 100.

Film production method

A composition which is useful for production of a light emitting device excellent in light emission efficiency is provided. In particular, provided is a composition containing a compound represented by formula (1) and a phosphorescent compound, wherein Rand Reach independently represent a substituent, nrepresents an integer of 1 to 14, and Arrepresents an arylene group or a divalent heterocyclic group, and at least one of one or more groups Aris a group represented by the formula (1-A), wherein the variable groups Rto R, R, and Rare as defined in the specification. 

Composition and light emitting element device using the same

A light emitting device is provided which contains an anode, a cathode, and two organic layers disposed between the anode and the cathode. The first organic layer contains a phosphorescent material and the second organic layer contains a crosslinked body of a crosslinkable material and a phosphorescent material. The two phosphorescent materials contain the same phosphorescent compound represented by formula (1), and the crosslinkable material is a compound represented by formula (3): In formula (1), M represents a metal atom, nis &#x2265;1, nis &#x2265;0, Eand Erepresent a carbon atom, Land Lrepresent an aromatic heterocyclic ring, and A-G-Arepresents an anionic bidentate ligand. In formula (3), mto mrepresent an integer of &#x2265;0, Armay represent an aromatic hydrocarbon group, Lmay represent a divalent group, and X&#x2033; may represent a crosslinkable group.

Light emitting device

A light emitting device including an anode, a cathode, a light emitting layer disposed between the anode and the cathode, and a hole transporting layer disposed between the anode and the light emitting layer is described. The light emitting layer is a layer containing an iridium complex (A) and a heterocyclic compound constituted of typical elements (B), the hole transporting layer is a layer containing a crosslinked body of a crosslinkable material. The molecular weight (MA) of the iridium complex (A) and the molecular weight (MB) of the heterocyclic compound (B) satisfy the formula 2700&#x2264;MA+MB&#x2264;10000 (M1-1) and the formula 0.35&#x2264;MA/MB&#x2264;3.00 (M2-1).

Light emitting device and composition used for this light emitting device

A light emitting device excellent in luminance life includes an anode, a cathode, a first organic layer (containing at least one phosphorescent compound) disposed between the anode and cathode and a second organic layer (containing at least one phosphorescent compound and a crosslinked body) disposed between the anode and first organic layer. At least one phosphorescent compound contained in the first and second organic layers is the same phosphorescent compound and is represented by the formula (1): wherein M may be an iridium atom, nrepresents an integer of 1 or more, nmay be 0 or more, Eand Emay be a carbon atom, ring Lrepresents an aromatic heterocyclic ring, ring Lmay be an aromatic hydrocarbon ring, A-G-Arepresents an anionic bidentate ligand, and at least one of rings Land Lhas an aryl group, a monovalent heterocyclic group or a substituted amino group.

A composition is provided containing: a phosphorescent compound having an emission spectrum whose maximum peak wavelength is between 380 nm or more and less than 495 nm, having no dendron and represented by formula (1'); two or more phosphorescent compounds having an emission spectrum whose maximum peak wavelength is between 495 nm or more and less than 750 nm and having a dendron; and a compound represented by formula (H-1). In formula (1&#x2032;) M represents an iridium atom or the like, nrepresents an integer of 1 or more, nrepresents an integer of 0 or more, Eand Erepresent a carbon atom or the like, the ring Rrepresents a diazole ring, the ring Rrepresents a 6-membered aromatic hydrocarbon ring or the like, and A-G-Arepresents an anionic bidentate ligand.

Composition and light emitting device using the same

A composition is provided containing a first phosphorescent compound (DB) having an emission spectrum whose maximum peak wavelength is from 400 nm to less than 480 nm and having a dendron and a second phosphorescent compound (DGR) having an emission spectrum whose maximum peak wavelength is from 480 nm to less than 680 nm and having a dendron.

A polymer compound is provided having constitutional units of formula (1) and formula (2), and a constitutional unit of formula (3) and/or (4'): wherein Arto Ar, Ar, Ar&#x2032; and Arrepresent arylene groups or the like; Arto Arrepresent aryl groups or the like; Arrepresents (2+p)-valent aromatic hydrocarbon group or the like; Arrepresents (2+n)-valent aromatic hydrocarbon group or the like; Rrepresents alkyl group or the like; L, L, Land Lrepresent alkylene groups or the like; Land Lrepresent oxygen atoms or the like; Qrepresents monovalent crosslinkable group; Q&#x2032; to Q&#x2032; represent monovalent crosslinkable groups or the like; x, y, c, nA and nD represent 0 or 1; p represents integer of 1 or greater; na and ng represent integer of 0 to 3; nb and nh represent integer of 0 to 12; and n represents integer of 1 to 4.

Polymer compound and light emitting element using same

A polymer compound is provided having a constitutional unit represented by the following formula (1): wherein: Rand Rrepresent an alkyl group, an aryl group, a mono-valent aromatic heterocyclic group, an alkoxy group or an aryloxy group, and Arrepresents an arylene group or a di-valent condensed polycyclic aromatic heterocyclic group.

Polymer compound and light-emitting element using the same

Composition and block type copolymer

A light emitting material included in a light emitting device. The light emitting material includes a conjugated polymer having a conjugated part and a blue light emitting compound having a blue light emitting part and satisfies the following formula y&#x2267;log(5.1&#xd7;x+1), wherein y represents the amount of light emitted by the blue light emitting compound where the total amount of light emitted by the conjugated polymer and the blue light emitting compound in the light emitting material due to excitation caused by light having a wavelength of 370 nm is 1, and provided that the gram light absorption coefficient of the conjugated polymer and the blue light emitting compound in the light emitting material are expressed by &#x3b5;and &#x3b5;, and further the content of the blue light emitting compound is expressed by P(parts by mass) where the total content of the conjugated polymer and the blue light emitting compound in the light emitting material is 100 parts by mass, x is defined by the formula: X=(&#x3b5;2/&#x3b5;1)&#xd7;Pcorresponds to x.

Light emitting material, ink composition, thin film, light emitting device and method for manufacturing light emitting device

A block copolymer comprising two or more of blocks of the following formula (1), wherein at least two of a plurality of m's present in the copolymer represent a number of 5 or more, Ar's in adjacent two blocks in the copolymer are mutually different, and the copolymer has two Ar's when composed of 2 blocks of the formula (1), has two or more Ar's when composed of 3 blocks of the formula (1) and has four or more Ar's when composed of 4 or more blocks of the formula (1): (in the formula (1), Ar represents a conjugative divalent group and represents the same divalent group in an identical block, and m represents a number of 1 or more showing the number average polymerization degree of Ar present in one block).

Block copolymer

An organic electroluminescence device wherein a light emitting layer exists between electrodes composed of an anode and a cathode, a layer (L) containing a polymer compound exists between the light emitting layer and the anode and the polymer compound contains a repeating unit of formula (1): wherein, Ar, Ar, Arand Arrepresent each independently an arylene group or divalent heterocyclic group; E, Eand Erepresent each independently aryl group (A) or heterocyclic group (B); a and b represent each independently 0 or 1, and 0&#x2266;a+b&#x2266;1; aryl group (A) is an aryl group having three or more substituents; and heterocyclic group (B) is a monovalent heterocyclic group having one or more substituents in which the sum of the number of the substituents and the number of hetero atoms of the heterocycle is 3 or more.

Organic electroluminescence device

A polymer compound comprising a repeating unit of the following formula (1) and having a polystyrene-reduced number average molecular weight of 1&#xd7;10to 1&#xd7;10: [wherein, Arand Arrepresent an arylene group, divalent heterocyclic group or divalent aromatic amine group. Zrepresents &#x2014;CR&#x2550;CR&#x2014; or &#x2014;C&#x2261;C&#x2014;. Here, Rand Rrepresent a hydrogen atom, alkyl group, aryl group or the like. m and n represent 1 or 2. Rand Rrepresent a hydrogen atom, alkyl group or alkoxy group.].

Polymer compound and light emitting device using the same

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Tsukuba, Japan

Makoto Anryu