Patent ID: 8039128

Claim:
An oligofluorene compound represented by the following general formula (III): wherein R 5 and R 6 each represent an alkyl group, a fluorinated alkyl group, or a substituted or unsubstituted aryl group; Ar 9 to Ar 12 each represent a substituted or unsubstituted fluorenyl group or a substituted or unsubstituted oligofluorenyl group represented by the following general formula (V): wherein R 9 to R 12 each represent an alkyl group, a fluorinated alkyl group, or a substituted or unsubstituted aryl group; R 13 to R 15 each represent a hydrogen atom, an alkyl group, a substituted or unsubstituted alkyl group, or a substituted or unsubstituted arylamino group; and n represents an integer of 0 to 10.