| abstract |
An object of this invention is to provide the composition for organic electroluminescent elements which can suppress crystal precipitation of the solute in a composition, and was excellent in storage stability. In addition, an object of the present invention is to provide an organic electroluminescent device which can form a uniform layer, has a long life, low driving voltage, and high luminous efficiency. The solution of the present invention is a composition for an organic electroluminescent device comprising a compound group α and a solvent composed of at least two or more compounds having a structure in which a plurality of aromatic rings are connected and having a molecular weight of 3000 or less, wherein the compound group α is most The structure of the compound (alpha) 1 which contains the compound (alpha) which has a small number of aromatic ring groups, and the other compound (alpha) which satisfy | fills specific conditions, and has the structure with the largest number of aromatic ring groups among the common partial structures of compound (alpha) and compound (alpha). Is 60% or more in agreement with the basic skeleton, and 1% by weight or more of each compound constituting the compound group α is used, and the use thereof. |