The invention relates to novel 2-(N,N-di(het)arylamino)-thiophene derivatives of formula (I), wherein R¹, R², R³, R⁴ and R⁵ are, independently each of other, each a monofunctional (het)aryl system and wherein R¹ can also be a bifunctional (het)arylene system, R³ can also be a group R⁸, except when R¹ is a bifunctional (het)arylene system, R⁸ representing chemical bond or a bifunctional (het)arylene system, R⁴ can also mean R¹⁰, R¹⁰ representing a chemical bond or a bifunctional (het)arylene system, or R⁴ can be one of the following groups (II) and (III), R⁹ representing a chemical bond or a bifunctional (het)arylene system and R⁵ can also be H or (IV).