The iridium complex mixture, the organic electroluminescence element and manufacturing method there

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PROBLEM TO BE SOLVED : To provide : an iridium complex mixture that is excellent in solubility, can be easily produced, and is excellent in durability of an element; an organic electroluminescent element using the iridium complex mixture; and a method for producing the same.SOLUTION : The iridium complex mixture has two or more iridium complexes represented by general formula (1) defined by (A)Ir(B)[A and B are bidentate ligands having different structures; A has a structure represented by general formula (2), where Rto Rare alkyl groups; and m is an integer from 0 to 2, and n is an integer from 1 to 3, satisfying m+n=3]. The bidentate ligands represented by B in the formula of at least two iridium complexes among the two or more iridium complexes are bidentate ligands having the same structure.