Sumitomo Chemical Company, Limited

Other

National Institute of Advanced Industrial Science and Technology

Cambridge Display Technology Limited

Shuji Doi

Takanobu Noguchi

Toshihiro Ohnishi

Yoshiaki Tsubata

Takahiro Ueoka

Satoshi Kobayashi

Makoto Kitano

Alejandro Andreatta

Tomoyuki Suzuki

Yasushi Iyechika

Tsuyoshi Nakano

Satoshi Mikami

Hideyuki Ikehira

Masamitsu Ishitobi

Yasuyuki Kurita

Masato Tanaka

Christopher Newsome

Shigeru Sasaki

Akiko Nakazono

Jun Oguma

Sumio Hara

Toshihiko Tanaka

Fumi Yamaguchi

Yoshikazu Makioka

Akihiko Okada

Michio Yamazaki

Yoshiaki Tsubara

Makiko Ohshima

Makano Kitano

Provided is a polymer blend for a semiconducting layer of an organic electronic device, comprising: a first polymer; a second polymer which is different from the first polymer; and a semiconductor compound selected from the group of pentacene derivatives and thiophene derivatives. The semiconductor compound is distributed homogeneously in the semiconducting layer in the direction parallel to the surface of the electrodes. This improved lateral distribution of the semiconductor compound in the semiconducting layer provides a reduced contact resistance, particularly for short channel length devices.

Polymer blends for a semiconducting layer of an organic electronic device

A polymeric light emitting substance having a polystyrene reduced number-average molecular weight of from 10to 10wherein this light emitting substance has in the main chain or side chain a metal complex structure showing light emission from the triplet excited state, and the substance can form a light emitting layer by industrially simple application methods such as a spin coat method, inkjet method, printing method and the like.

Polymeric light emitting substance and polymer light emitting device using the same

A metal complex which has a metal complex structure showing light emission from triplet excited state, and has a monovalent group derived from carbazole, and a light-emitting device using said metal complex.

Metal complex and organic electroluminescent device

High-molecular compounds comprising repeating units represented by the general formula (1) or (2) and having number-average molecular weights of 10to 10in terms of polystyrene: (1) [wherein Arand Arare each independently a trivalent aromatic hydrocarbon group or a trivalent heterocyclic group; and Xand Xare each independently O, S, C(&#x2550;O), S(&#x2550;O), SO, C(R)(R), Si(R)(R), N(R), B(R), P(R), or P(&#x2550;O)(R), with the provisos that Xand Xmust not be the same and that Xand Arare bonded respectively to the adjacent carbon atoms constituting the aromatic ring of Ar, and Xand Arare bonded respectively to the adjacent carbon atoms constituting the aromatic ring of Ar] (2) [wherein Arand Arare each independently a trivalent aromatic hydrocarbon group or a trivalent heterocyclic group; and Xand Xare each independently N, B, P, C(R), or Si(R), with the provisos that Xand Xmust not be the same and that Xand Arare bonded respectively to the adjacent carbon atoms constituting the aromatic ring of Ar, and Xand Arare bonded respectively to the adjacent carbon atoms constituting the aromatic ring of Ar]. 

Polymer compound and polymer light-emitting device using the same

A polymeric light emitting substance having a polystyrene reduced number-average molecular weight of from 10to 10wherein this light emitting substance has in the main chain or side chain a metal complex structure showing light emission from the triplet excited state, and said substance can form a light emitting layer by industrially simple application methods such as a spin coat method, inkjet method, printing method and the like.

A polymeric fluorescent substance exhibiting fluorescence in the solid state, having a polystyrene reduced number-average molecular weight of 1&#xd7;10to 1&#xd7;10, and comprising one or more repeating units of formula (1) and one or more repeating units of formula (8),&#x2014;Ar&#x2014;(CR&#x2550;CR)&#x2014;&#x2003;&#x2003;(1)&#x2014;Ar&#x2014;(CR&#x2550;CR)&#x2014;&#x2003;&#x2003;(8)wherein Arrepresents a specific arylene or a divalent heterocyclic compound group, and Arrepresent an arylene or a divalent heterocyclic compound group other than Ar. By using the polymeric fluorescent substance, a high performance polymer LED can easily be obtained.

Polymeric fluorescent substance and polymer light-emitting device using the same

Provided is a polymer comprising a repeating unit represented by formula (1), wherein, Arepresents a divalent group in which the bond distance ratio (bond distance of C(&#x3b1;)-A/bond distance of C(&#x3b1;)-C(&#x3b2;)) is 1.10 or more; R, R, R, R, R, and R, each independently represent a hydrogen atom, alkyl group, alkyloxy group, aryloxy group, arylalkyloxy group, etc. The polymer is useful as a light-emitting material, a charge transporting material, etc.

Polymer and polymer light-emitting device using the same

A method for producing a polymeric fluorescent substance characterized by comprising the step of contacting with an alkali a crude polymeric fluorescent substance that is fluorescent in a solid state and has a polystyrene equivalent number average molecular weight of 10to 10and one or more repeating units represented by the following formula (1):&#x2014;Ar&#x2014;(CR&#x2550;CR)&#x2014; &#x2003;&#x2003;(1)wherein Aris an arylene group or heterocyclic compound group that is unsubstituted or substituted by one or more substituents; Rand Reach independently represent a group selected from the group consisting of a hydrogen atom, an alkyl group, an aryl group, a heterocyclic compound group and a cyano group, in which the aryl group and the heterocyclic compound group is optionally substituted by another substituent; and n is 0 or 1.

Polymeric fluorescent material, process for producing the same, and polymeric luminiscent element

A polymeric fluorescent substance exhibiting visible fluorescence in the solid state, having polystyrene reduced number average molecular weight of 1&#xd7;10to 1&#xd7;10, and comprising one or more repeating units of following formula (1), wherein Arand Areach independently represent an arylene group or the like; Arrepresents an aryl group or the like having one or more substituents of formula (2) as nuclear substitution; X represents &#x2014;CR&#x2550;CR&#x2014; or &#x2014;C&#x2261;C&#x2014;; and n is 0 or 1,&#x2014;Y&#x2014;Ar&#x2003;&#x2003;(2)wherein Arrepresents an aryl group or the like; and Y represents &#x2014;CR&#x2550;CR&#x2014; or &#x2014;C&#x2261;C&#x2014;. The triarylamine type polymeric fluorescent substance is excellent in quantum yield of fluorescence and in light emitting efficiency when made into a device.

Polymeric fluorescent substrate and polymer light-emitting device using the same

Provided is a polymeric fluorescent substance comprising a copolymer which has a substituent containing a specific aromatic amine structure below in the side chain, wherein Xis a divalent hydrocarbon group; Aris an arylene group or the like; Arand Arindependently represent an aryl group or the like. The polymeric fluorescent substance is preferably used for a light emitting layer of a polymer LED having high luminance and high light emitting efficiency.

A polymeric fluorescent substance showing fluorescence in the solid state, having a polystyrene reduced number-average molecular weight of 10to 10, and comprising one or more repeating units of formula (1) and one or more repeating units of formula (2) which is different from formula (1), exhibits strong fluorescence and/or excellent charge transporting property, and a high performance polymer LED which can be driven at low voltage and high efficiency is obtained.

A block copolymer comprising two or more blocks and having fluorescence in the solid state, wherein blocks thereof may be the same or different, and in each of the blocks, one or more kinds of repeating units are bonded through conjugated bonds, and bonding between the blocks is made by junction unit having conjugated bond, and the polystyrene reduced number average molecular weight of at least one block is 1&#xd7;10to 1&#xd7;10.

Block copolymer and polymeric luminescent element

An electroluminescent device comprising electrodes consisting of a pair of an anode and a cathode, at least one of the electrodes being either transparent or translucent, and an organic layer interposed between said electrodes, wherein said organic layer comprises a copolymer comprising in the main chain thereof 9-oxo-9-phosphafluorene-2,7-diyl units and arylene units, represented by formula (1) below, and the thickness of said organic layer is from 1 nm to 10 &#x3bc;m:wherein R represents hydrogen, alkyl, cycloalkyl, aralkyl, aryl, alkyloxy, cycloalkyloxy, aralkyloxy, or aryloxy; Ar represents arylene; and n is an integer of 3 to 30,000.

Electroluminescent element

Provided is a polymeric fluorescent substance containing specific proportion of a repeating unit comprising 2 to 5 arylene groups or heterocyclic compound groups. The polymeric fluorescent substance has strong fluorescence, and can be suitably used as a polymer for high performance polymer LED and a dye for laser.

Growing community of inventors

Tsukuba, Japan

Shuji Doi