Light emitting element and iridium complex

摘要

An organic electroluminescent element has a pair of electrodes, and at least one organic layer provided between the electrodes. At least one of the organic layers is a light-emitting layer comprising at least one transition metal complex (I). An organic electroluminescent element has a pair of electrodes, and at least one organic layer provided between the pair of electrodes. At least one of the organic layers is a light-emitting layer comprising at least one transition metal complex of formula (I). [Image] Q 1> 1>group for forming a nitrogen-containing condensed aromatic ring; Y 1> 1>connecting group; M 1> 1>transition metal ion; L 1> 1>ligand; X 1> 1>counter ion; n11 : 0-4; m11 : 1-4; and q11 and r11 : 0-3. Y 1> 1> is not bonded to Q 1> 1> to form 8-hydroxyquinolinol ligand. An independent claim is also included for iridium complex of formula (A). [Image] A 1>-A 4>H or substituent, and adjacent groups may be bonded to each other to form a benzene ring; A 5> and A 6>substituent; and t61 and t62 : 0-4.