Thiophene derivative and electroluminescent element

摘要

A thiophene derivative useful for a material for forming an organic positive hole layer of an organic EL element excellent in light emitting efficiency, water resistance or the like, a polymer having the thiophene derivative as a monomer unit, and an organic EL element. The object can be solved by a thiophene derivative represented by the following formula (1), a polymer comprising the thiophene derivative, and an organic EL element, an organic positive hole transporting layer of which comprises the polymer: wherein, each "X" is a halogen atom, which may be same or different from each other; and "R" is an alkyl group.