Patent ID: 8138355

Claim:
A heteroacene derivative represented by the following formula (1): wherein the substituents R 1 to R 4 are the same or different and each represents a hydrogen atom, a fluorine atom, a chlorine atom, an aryl group having 4 to 30 carbon atoms, an alkyl group having 3 to 20 carbon atoms, or a halogenated alkyl group having 1 to 20 carbon atoms; T 1 and T 2 are the same or different and each represents sulfur, selenium, tellurium, phosphorus, boron, or aluminum; l and m each is an integer of 0 or 1; and rings A and B are the same or different and each has a structure represented by the following formulae (A-1): wherein the substituents R 5 to R 7 are the same or different and each represents a hydrogen atom, a fluorine atom, a chlorine atom, an aryl group having 4 to 30 carbon atoms, an alkyl group having 3 to 20 carbon atoms, or a halogenated alkyl group having 1 to 20 carbon atoms; the substituents R 5 and R 6 may be together combined to form a substituted or unsubstituted benzene ring, a substituted or unsubstituted pyridine ring, or a substituted or unsubstituted pyrazine ring; the substituent T 3 represents sulfur, selenium, tellurium or oxygen and n is an integer of 0.