Patent ID: 6979414

Claim:
An organic host material for an organic electroluminescence element, the organic host material being at least one of the carbazole derivatives or a compound from the compounds of the following general formula (1) to (4): wherein Ar 1 is a substituted phenyl, biphenyl, terphenyl, quaterphenyl or naphthyl group, or a substituted or non-substituted carbazolylphenyl group, provided Ar 1 contains a carbazole group; and m and n is 0 or 1; at least one of Ar 1 contains a carbazole group; and m and n is 0 or 1; wherein R 1 to R 8 are each independently a hydrogen or alkyl group; X 1 and X 2 are each independently an alkyl, or alkyl-substituted or non-substituted phenyl or biphenyl group; Y is phenylene or biphenylene; and p is 2 or 3; wherein is each independently a carbazolyl group, R 9 is an alkyl-substituted or non-substituted phenyl, biphenyl, terphenyl, naphthyl, carbazolyl group or at least one of R 9 , contains a carbazolyl group; and wherein Z is a trivalent nitrogen atom or benzenetriyl group; and Ar 12 to Ar 14 are each independently a carbazolyl, carbazolylphenyl, carbazolylbiphenyl, carbazolylnaphthyl group or provided that all Ar 12 to Ar 14 are not the same group.