Patent ID: 7235312

Claim:
An organic electroluminescence device which emits reddish light and comprises a pair of electrodes and an organic compound layer which comprises a light emitting layer or a plurality of layers comprising a light emitting layer and is disposed between the pair of electrodes, wherein at least one layer in the organic compound layer comprises an aromatic compound represented by general formula (I): wherein general formulae (I) and (I′) satisfy any one of following conditions (1) to (4): (1) Among X 1 to X 20 , at least four each independently represent a linear or branched alkoxyl group having 1 to 6 carbon atoms, and others each represent hydrogen atom; (2) Among X 1 to X 20 , at least one represents a linear or branched alkyl group having 1 to 6 carbon atoms, at least one represents a linear or branched alkoxyl group having 1 to 6 carbon atoms, a total of a number of the alkyl group and a number of the alkoxyl group being 4 or greater, and others each represent hydrogen atom; (3) Among X 1 to X 20 , at least six each independently represent a linear or branched alkyl group having 1 to 6 carbon atoms, and others each represent hydrogen atom; and (4) Among X 1 to X 20 , at least four each independently represent a linear or branched alkyl group having 1 to 6 carbon atoms, two alkyl groups among said alkyl groups having 3 to 6 carbon atoms, and others each represent hydrogen atom.