Patent ID: 7291405
Filing Date: 2007-11-06
Classification: C09K,H01L,H05B,Y10S

Abstract:
1. An organic electroluminescent device comprising: a pair of electrodes; and at least one organic compound layer between the pair of electrodes, the at least one organic compound layer including a light emitting layer, wherein the light emitting layer contains at least one host material and at least one luminescent material, wherein the luminescent material is a phosphorescent material that is an iridium complex, a platinum complex, a rhenium complex, a ruthenium complex, a palladium complex or a rhodium complex and the host material is a metal complex containing a metal in groups 4 to 11 of a Periodic Table and the host material is present in the light emitting layer in an amount of 50 to 99.9% by weight; wherein the host material is a compound selected from the group consisting of a compound represented by the formula (II), a compound represented by the formula (III), a compound represented by the formula (IV), a compound represented by the formula (V), and a compound represented by the formula (VI): wherein Q