Organic electrochromic materials having high transparency and high contrast in the visible range

The present invention relates to electrochromic polymers, obtained by polymerization of monomers. The present invention further relates to monomers of general formula (I) or (II), wherein A and B are specific functional groups selected among the following: -C=0, -C=S, - 0(C=0), -0(C=S), -0(C=0)0, -(C=0)0, -(C=S)0, -(C=S)S, -(C=0)N, -(C=S)N, -SO, - S02, or, as an alternative, any linear or branched alkylic chain or a glycolic chain; wherein R and R' are linear or branched alkylic chains or glycolic chains, and wherein W is a monodisperse electrochromic derivative of general formula (III), wherein Het-1 and Het-2 are specific heterocyclic groups, and wherein π represents one of the following: a double bond, a triple bond or a plurality of double or triple bonds conjugated in a number n, n being equal to 2 or 3 or, for example, a benzenic ring or a thiophenic ring; X represents one of the following elements: O, S, Se; wherein R2, R3 and R4 are substituents; and wherein m is equal to 0, 4, 5 or 6. The present invention also relates to electrochromic panels and electrochromic ophthalmic lenses, comprising polymers in accordance with the present invention.