Sumitomo Chemical Company, Limited

Shin-Ya Tanaka

Daisuke Fukushima

Motoaki Usui

Ken Yoshimura

Toshiaki Sasada

Ryuji Matsumoto

Haruki Otsuka

Atsushi Asano

A light emitting device having excellent external quantum efficiency contains an anode, a cathode, and two organic layers disposed therebetween. One layer contains a phosphorescent transition metal complex and a low molecular weight compound containing no transition metal, and the second layer contains a crosslinked body of a polymer compound (having an energy level of the lowest triplet excited state of 2.30 eV or more) containing a constitutional unit having a crosslinking group. The low molecular weight compound has formula (T-1) and the absolute value of the difference between the energy levels of the lowest triplet excited state and the lowest singlet excited state is less than 0.25 eV. nrepresents an integer of 0 to 5, nrepresents an integer of 1 to 10, Arrepresents a substituted amino group or a monovalent hetero ring group, Lrepresents an alkylene group, and Arrepresents a hetero ring group.

Light emitting device having thermally activated delayed fluorescent (TADF) compound

A composition is provided containing a phosphorescent compound and a polymer compound having a constitutional unit represented by the formula (Y):Ar&#x2003;&#x2003;(Y)wherein Arrepresents an arylene group, a divalent heterocyclic group or the like; and at least one constitutional unit selected from the constitutional units represented by the formulas (Ia) to (Id): wherein m represents an integer of 0 to 4, n represents an integer of 0 to 3, Rrepresents an alkyl group, an alkoxy group, an aryl group, a monovalent heterocyclic group or the like, Rrepresents a hydrogen atom, an alkyl group, an alkoxy group, an aryl group, a monovalent heterocyclic group or the like, Ar represents an aromatic hydrocarbon group or a heterocyclic group, nA and nB represent an integer of 0 to 3, and Land Lrepresent an alkylene group, a cycloalkylene group, an arylene group or a divalent heterocyclic group.

Composition and light emitting device using the same

Provided is a polymer compound which is useful for production of a light emitting device excellent in light emission efficiency is provided. The polymer compound contains a constitutional unit represented by the formula (1) and a constitutional unit represented by the formula (Y) as follows: wherein Rto Rrepresent a hydrogen atom, an alkyl group, an aryl group or the like, and Rand Rrepresent an aryl group or a monovalent heterocyclic group, andAr&#x2003;&#x2003;(Y)wherein Arrepresents an arylene group or the like.

Polymer compound and light emitting device using the same

An organic electroluminescent element comprising:

Organic electroluminescent element, production method for the same, planar light source, lighting device, and display device

A polymer compound, is provided in which at least a part of repeating units has a group containing a carbon cluster structure. The polymer compound preferably one or more, more preferably two or more, units selected from an arylene unit, a heteroarylene unit and an aromatic amine unit, as repeating units.

Polymer compound having carbon cluster structure and organic device using same

An organic electroluminescent device includes a pair of electrodes and a plurality of organic layers disposed between the electrodes, and one of the organic layers includes an organic material forming the organic layers and a polymer obtained by polymerizing a polymerizable compound capable of exhibiting charge portability.

Organic electroluminescent device comprising a polymer obtained by polymerizing a polymerizable compound capable of exhibiting charge transportability and method for manufacturing the same

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Tsukuba, Japan

Shin-Ya Tanaka