Patent ID: 8822041

Claim:
An organic electroluminescence device comprising one or more organic thin film layers comprising a light emitting layer between a cathode and an anode, wherein the light emitting layer comprises a host material that consists of an anthracene derivative comprising a phenanthryl group, the anthracene derivative being represented by formula (1-2): wherein: the phenanthryl group in formula (1-2) is one of a substituted or unsubstituted 1-phenanthryl group, a substituted or unsubstituted 2-phenanthryl group, a substituted or unsubstituted 3-phenanthryl group, and a substituted or unsubstituted 4-phenanthryl group; L 2 represents a substituted or unsubstituted arylene group having 6 to 50 ring-forming carbon atoms, or a divalent heterocyclic group having 5 to 50 ring-forming atoms; Ar 2 represents a substituted or unsubstituted aryl group having 6 to 50 ring-forming carbon atoms, or a heterocyclic group having 5 to 50 ring-forming atoms; substituents R a and R b each independently represent a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 50 carbon atoms, a substituted or unsubstituted alkynyl group having 2 to 50 carbon atoms, a substituted or unsubstituted aralkyl group having 7 to 20 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 20 carbon atoms, a substituted or unsubstituted alkoxyl group having 1 to 20 carbon atoms, a substituted or unsubstituted aryloxy group having 6 to 20 ring-forming carbon atoms, a substituted or unsubstituted aryl group having 6 to 50 ring-forming carbon atoms, a substituted or unsubstituted heteroaryl group having 5 to 50 ring-forming atoms, a substituted or unsubstituted alkylsilyl group having 1 to 30 carbon atoms, a substituted or unsubstituted arylsilyl group having 6 to 50 ring-forming carbon atoms, a substituted or unsubstituted alkylgermanium group having 1 to 50 carbon atoms, or a substituted or unsubstituted arylgermanium group having 6 to 50 ring-forming carbon atoms, and the substituent R b represents a group except a substituted or unsubstituted anthracenyl group; “p” represents an integer of 0 to 8; “q” represents an integer of 0 to 9; and when “p” represents 2 to 8 or “q” represents 2 to 9, a plurality of R a 's or a plurality of R b 's are identical to or different from each other.