| abstract |
A material for an organic electroluminescence device is provided and contains compounds represented by the following formulae (3a) and (3b). The compound (3a) has a molecular weight smaller than that of the compound (3b), and the material has a content ratio of the compound (3a) to the compound (3b) of from 0.1 to 5,000 ppm. n n n n n n n n n n In the formulae, each of R 1a to R 1i independently represents a hydrogen atom, an alkyl group having a carbon number of 1 to 20, a cycloalkyl having a carbon number of 3 to 8, an aryl group having a carbon number of 6 to 18, an cyano group, or a fluoro group; n is 1 or 2; and L a and L b form one of the specific bidentate ligands. |