Patent ID: 7494721

Claim:
A light-emitting device emitting light by electric energy having one or more layers of organic thin films formed between an anode and a cathode, characterized in that the organic thin film contains a compound represented by the following General Formula (3) or (4): (wherein, X 1 , X 2 , X 3 and X 4 each independently represent an oxygen, sulfur, selenium, or tellurium atom, or NR 29 ; and R 29 represents a hydrogen atom, an alkyl group having 1 to 6 carbon atoms which may be substituted with at least one group selected from the group consisting of a halogen atom, phenyl, biphenyl, naphthyl, pyridino, thienyl, and furyl groups, and phenyl, biphenyl, naphthyl, pyridino, thienyl, or furyl groups which may be substituted with at least one group selected from the group consisting of an alkyl group having 1 to 6 carbon atoms, a halogen atom, and phenyl, biphenyl, naphthyl, pyridino, thienyl, and furyl groups; R 1 to R 28 each independently represent a hydrogen atom; a halogen atom; an alkyl group having 1 to 6 carbon atoms which may be substituted with at least one group selected from the group consisting of a halogen atom, phenyl, biphenyl, naphthyl, pyridino, thienyl, and furyl groups; and a phenyl, biphenyl, naphthyl, pyridino, thienyl, or furyl group which may be substituted with at least one group selected from the group consisting of an alkyl group having 1 to 6 carbon atoms, a halogen atom, and phenyl, biphenyl, naphthyl, pyridino, thienyl, and furyl groups, and the neighboring groups among the substituent groups represented by R 1 to R 14 and R 29 in Formula (3) and R 15 to R 29 in Formula (4) may bind to each other to form a benzene or naphthalene ring).