Patent ID: 8188462

Claim:
An electronic device comprising at least one active layer comprising at least one of Spirobifluorene (“SBF”) derivatives selected from general formulae (II), (III), (IV), (V) and (VI) and corresponding radical anions: in which K, L, M and N, the same or different from each other, are independently: H or A-C═O, with the proviso that it is never K=L=M=N═H, R 1 ═R 2 ═R 3 ═H; or R 1 ═R 3 ═H and R 2 ═C 1-6 (alkyl); or R 1 ═R 2 ═H and R 3 ═C 1-6 (alkyl); or R 2 ═H and R 1 ═R 3 ═C 1-6 (alkyl), R 5 =A-C═O and R 4 ═R 6 ═H; or R 5 =A-C═O and R 4 ═R 6 ═C 1-4 (alkyl); or R 6 =A-C═O and R 4 ═R 5 ═H; or R 6 =A-C═O and R 4 ═R 5 ═C 1-4 (alkyl), R 7 ═R 9 =A-C═O and R 8 ═H; or R 7 ═R 9 =A-C═O and R 8 ═C 1-4 (alkyl), and R 10 ═R 11 ═R 12 =A-C═O, and wherein A is an aromatic group bearing at least one radical R or R′, with R═H or aliphatic group and R′ is a halogen, trifluoromethyl, hydroxyl, —SH, —SC[C 1-6 (alkyl)], alkoxy, nitro, cyano, —COOH, —COOC[C 1-4 (alkyl)], —NH 2 , —NC[C 1-4 (alkyl)] 2 , benzyl, or benzoyl.