| 摘要 |
PROBLEM TO BE SOLVED: To provide a material for organic light emitting element to emit colors from orange to red, which can be driven by a low voltage, has a high luminance and a high efficiency, superior in stability at repeated using times, and make possible a uniform surface emission. SOLUTION: This is the light emitting element material which is a compound expressed in Formula (1). In the formula, Ar1 and Ar6 represent an aryl group or divalent heterocyclic group, respectively. R2, R3, R7 and R8 are an aryl, heterocyclic group or aliphatic hydrocarbon group, respectively. R4a, R5a, R9a and R10aa represent a hydrogen atom or substituted group, respectively, and at least one of R4a, R5a, R9a and R10a represents an electron-attracting group wherein σp value of Hammet is 0.2 or more. L1 represents divalent aryl group or heterocyclic group or the like. X represents O, S, N-RX1, CRX2RX3, and RX1, RX2, RX3 represents a hydrogen atom or a substituted group, respectively. |
