Composition for organic electroluminescent element, organic electroluminescent element, display and lighting

1:

• A composition comprising a compound group α for organic electroluminescent element and a solvent, wherein:
• the compound group α is constituted of at least two kinds of compounds which each have a molecular weight of 3,000 or less and have a structure comprising a plurality of aromatic ring groups linked to each other;
• the compound group α comprises a first compound α1, which is the smallest in the number of aromatic ring groups, and another compound an (n is any integer of 2 or larger);
• when a structure which is the largest in the number of the aromatic ring groups, of partial structures that are common between the compound α1 and the compound an, is taken as a basic framework, 60% or more of the structure of the compound α1 is identical with the basic framework,
• the compounds which constitute the compound group α each is mixed in an amount of 1% by weight or large, and
• each of the compounds included in the compound group α is a compound represented by formula (B):
• wherein:
• Xb1 and Yb1 each independently represent an aromatic hydrocarbon ring group which has 6-30 carbon atoms and may have a substituent or a heteroaromatic ring group which has 3-30 carbon atoms and may have a substituent;
• and
• Xb2, Xb3, Yb2, and Yb3 each independently represent a hydrogen atom, an aromatic hydrocarbon ring grout which has 6-30 carbon atoms and may have a substituent, or a heteroaromatic ring group which has 3-30 carbon atoms and may have a substituent.