Udc Ireland Limited

Keiju Tonosaki

Toshihiro Ise

Tetsu Kitamura

Kousuke Watanabe

Toru Watanabe

Akira Takeda

As an organic electroluminescence device that has an excellent emission characteristic, suppresses a change in chromaticity when driving at a high temperature and has excellent durability, the organic electroluminescence device includes on a substrate a pair of electrodes and a light emitting layer disposed between the electrodes, in which the light emitting layer contains a compound represented by the following Formula (1) and a specific metal complex is provided.(Cz)-L-(A)&#x2003;&#x2003;(1) (In Formula (1), Cz represents a substituted or unsubstituted arylcarbazolyl group or a substituted or unsubstituted carbazolylaryl group. L represents a single bond, a substituted or unsubstituted arylene group, a substituted or unsubstituted cycloalkylene group or a substituted or unsubstituted aromatic heterocyclic ring. A is a substituted or unsubstituted nitrogen-containing aromatic heterocyclic six-membered ring, and each of p and q independently represent an integer of 1 to 6.)

Organic electroluminescence device

Provided is a material selecting method used upon purifying an iridium complex by sublimation which includes: selecting an iridium complex having a specific structure and having a rate of weight loss of 45% or greater when heated to 500&#xb0; C. at a heating rate of 2&#xb0; C./min under the degree of vacuum of from 1&#xd7;10Pa to 1&#xd7;10Pa; and carrying out sublimation purification.

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Kanagawa, Japan

Keiju Tonosaki