TECHNOLOGY FOCUS - POLYMERS - Preferred Polymer: In the polymer, the unit of formula (1) is a unit of formula (1a). Preferred Device: The electronic device is an organic field effect transistor (OFET), or an organic photovoltaic device (OPV). Full Definitions:    R1 and R2=independently from each other H, 1-30C-alkyl optionally substituted with 1 to 6 substituents Rc, 2-30C-alkenyl optionally substituted with 1 to 6 substituents Rc, 2-30C-alkynyl optionally substituted with 1 to 6 substituents Rc, 3-10C-cycloalkyl optionally substituted with 1 to 6 substituents Rd, 6-14C-cycloalkenyl optionally substituted with 1 to 6 substituents Rd, monovalent 3 to 14 membered aliphatic heterocyclic residue optionally substituted with 1 to 6 substituents Rd, 6-14C-aryl optionally substituted with 1 to 6 substituents Re or monovalent 5 to 14 membered aromatic heterocyclic residue optionally substituted with 1 to 6 substituents Re;    Rc=at each occurrence are independently from each other selected from =O, =C(CN)2, -O-2-6C-alkylene-O-, halogen, -CN, -NO2, -OH, 1-10C-alkoxy, -O-CH2CH2O-1-10C-alkyl, -O-COR3, -S-1-10C-alkyl, -NH2, -NHR3, -NR3R4, -NH-COR3, -COOH, -COOR3, -CONH2, -CONHR3, -CONR3R4, -CO-H, -COR3, 3-10C-cycloalkyl, monovalent 3 to 14 membered aliphatic heterocyclic residue, 6-14C-aryl and monovalent 5 to 14 membered aromatic heterocyclic residue;    Rd=at each occurrence are independently from each other selected from =O, =C(CN)2, -O-2-6C-alkylene-O-, halogen, -CN, -NO2, -OH, 1-10C-alkoxy, -O-CH2CH2O-1-10C-alkyl, -O-COR3, -S-1-10C-alkyl, -NH2, -NHR3, -NR3R4, -NH-COR3, -COOH, -COOR3, -CONH2, -CONHR3, -CONR3R4, -CO-H, -COR3, 1-10C-alkyl, 2-10C-alkenyl, 2-10C-alkynyl, 6-14C-aryl and monovalent 5 to 14 membered aromatic heterocyclic residue;    Re=at each occurrence are independently from each other selected from =O, =C(CN)2, -O-2-6C-alkylene-O-, halogen, -CN, -NO2, -OH, 1-10C-alkoxy, -O-CH2CH2O-1-10C-alkyl, -O-COR3, -S-1-10C-alkyl, -NH2, -NHR3, -NR3R4, -NH-COR3, -COOH, -COOR3, -CONH2, -CONHR3, -CONR3R4, -CO-H, -COR3, 1-10C-alkyl, 2-10C-alkenyl, 2-10C-alkynyl, 3-10C-cycloalkyl, 5-10C-cycloalkenyl and monovalent 3 to 14 membered aliphatic heterocyclic residue;    R3 and R4=at each occurrence are independently from each other selected from 1-10C-alkyl, 2-10C-alkenyl, 2-10C-alkynyl, 3-10C-cycloalkyl, 5-10C-cyclo-alkenyl, monovalent 3 to 14 membered aliphatic heterocyclic residue, 6-14C-aryl and monovalent 5 to 14 membered aromatic heterocyclic residue;    G1 and G2=are independently from each other 6-14C-arylene optionally substituted with 1 to 6 substituents Ra or bivalent 5 to 14 membered aromatic heterocyclic residue optionally substituted with 1 to 6 substituents Ra;    Ra=at each occurrence are independently from each other selected from =O, =C(CN)2, -O-2-6C-alkylene-O-, halogen, -CN, -NO2, -OH, 1-30C-alkoxy, -O-CH2CH2O-1-30C-alkyl, -O-COR8, -S-1-30C-alkyl, -NH2, -NHR8, -NR8R9, -NH-COR8, -COOH, -COOR8, -CONH2, -CONHR8, -CONR8R9, -CO-H, -COR8, 1-30C-alkyl optionally substituted with 1 to 6 substituents Rf, 2-30C-alkenyl optionally substituted with 1 to 6 substituents Rf, 2-30C-alkynyl optionally substituted with 1 to 6 substituents Rf, 3-10C-cycloalkyl optionally substituted with 1 to 6 substituents Rg, 5-10C-cycloalkenyl optionally substituted with 1 to 6 substituents Rg and monovalent 3 to 14 membered aliphatic heterocyclic residue optionally substituted with 1 to 6 substituents Rg;    R8 and R9=at each occurrence are independently from each other selected from 1-30C-alkyl, 2-30C-alkenyl, 2-30C-alkynyl, 3-10C-cycloalkyl, 5-10C-cycloalkenyl, monovalent 3 to 14 membered aliphatic heterocyclic residue, 6-14C-aryl and monovalent 5 to14 membered aromatic heterocyclic residue;    Rf=at each occurrence are independently from each other selected from =O, =C(CN)2, -O-2-6C-alkylene-O-, halogen, -CN, -NO2, -OH, 1-10C-alkoxy, -O-CH2CH20-1-10C-alkyl, -O-COR10, -S-1-10C-alkyl, -NH2, -NHR10, -NR10R11, -NH-COR10, -COOH, -COOR10, -CONH2, -CONHR10, -CONR10R11, -CO-H, -COR10, 3-10C-cycloalkyl, monovalent 3 to 14 membered aliphatic heterocyclic residue, 6-14C-aryl and monovalent 5 to 14 membered aromatic heterocyclic residue;    Rg=at each occurrence are independently from each other selected from =O, =C(CN)2, -O-2-6C-alkylene-O-, halogen, -CN, -NO2, -OH, 1-10C-alkoxy, -O-CH2CH20-1-10C-alkyl, -O-COR10, -S-1-10C-alkyl, -NH2, -NHR10, -NR10R11, -NH-COR10, -COOH, -COOR10, -CONH2, -CONHR10, -CONR10R11, -CO-H, -COR10, 1-10C-alkyl, 2-10C-alkenyl, 2-10C-alkynyl, 6-14C-aryl and monovalent 5 to 14 membered aromatic heterocyclic residue;    R10 and R11=at each occurrence are independently from each other selected from 1-10C-alkyl, 2-10C-alkenyl, 2-10C-alkynyl, 3-10C-cycloalkyl, 5-10C-cycloalkenyl, monovalent 3 to 14 membered aliphatic heterocyclic residue, 6-14C-aryl and monovalent 5 to14 membered aromatic heterocyclic residue, or G1 and G2 are independently from each other selected from: formula (a), formula (b) or formula (c);    R5 and R6=independently from each other H or 1-30C;    L=6-24C-arylene optionally substituted with 1 to 6 substituents Rb or bivalent 5 to 24 membered aromatic heterocyclic residue optionally substituted with 1 to 6 substituents Rb;    Rb=at each occurrence are independently from each other selected from =O, =C(CN)2, -O-2-6C-alkylene-O-, halogen, -CN, -NO2, -OH, 1-30C-alkoxy, -O-CH2CH20-1-30C-alkyl, -O-COR12, -S-1-30C-alkyl, -NH2, -NHR12, -NR12R13, -NH-COR12, -COOH, -COOR12, -CONH2, -CONHR12, -CONR12R13, -CO-H, -COR12, 1-30C-alkyl optionally substituted with 1 to 6 substituents Rh, 2-30C-alkenyl optionally substituted with 1 to 6 substituents Rh, 2-30C-alkynyl optionally substituted with 1 to 6 substituents Rh, 3-10C-cyclo-alkyl optionally substituted with 1 to 6 substituents Ri, 5-10C-cycloalkenyl optionally substituted with 1 to 6 substituents Ri and monovalent 3 to 14 membered aliphatic heterocyclic residue optionally substituted with 1 to 6 substituents Ri;    R12 and R13=at each occurrence are independently from each other selected from 1-30C-alkyl, 2-30C-alkenyl, 2-30C-alkynyl, 3-10C-cycloalkyl, 5-10C-cycloalkenyl, monovalent 3 to 14 membered aliphatic heterocyclic residue, 6-14C-aryl and monovalent 5 to14 membered aromatic heterocyclic residue;    Rh=at each occurrence are independently from each other selected from =O, =C(CN)2, -O-2-6C-alkylene-O-, halogen, -CN, -NO2, -OH, 1-10C-alkoxy, -O-CH2CH20-1-10C-alkyl, -O-COR14, -S-1-10C-alkyl, -NH2, -NHR14, -NR14R15, -NH-COR14, -COOH, -COOR14, -CONH2, -CONHR14, -CONR14R15, -CO-H, -COR14, 3-10C-cycloalkyl, monovalent 3 to 14 membered aliphatic heterocyclic residue, 6-14C-aryl and monovalent 5 to 14 membered aromatic heterocyclic residue;    Ri=at each occurrence are independently from each other selected from =O, =C(CN)2, -O-2-6C-alkylene-O-, halogen, -CN, -NO2, -OH, 1-10C-alkoxy, -O-CH2CH20-1-10C-alkyl, -O-COR14, -S-1-10C-alkyl, -NH2, -NHR14, -NR14R15, -NH-COR14, -COOH, -COOR14, -CONH2, -CONHR14, -CONR14R15, -CO-H, -COR14, 1-10C-alkyl, 2-10C-alkenyl, 2-10C-alkynyl, 6-14C-aryl and monovalent 5 to 14 membered aromatic heterocyclic residue;    R14 and R15=at each occurrence are independently from each other selected from 1-10C-alkyl, 2-10C-alkenyl, 2-10C-alkynyl, 3-10C-cycloalkyl, 5-10C-cycloalkenyl, monovalent 3 to 14 membered aliphatic heterocyclic residue, 6-14C-aryl and monovalent 5 to14 membered aromatic heterocyclic residue, or L is formula (d), formula (e), or formula (f);    R16 and R17=are independently from each other H, 1-30C-alkyl, -CN or halogen;    q and s=independently from each other 0, 1, 2, 3, 4 or 5;    r=0, 1 or 2; and    n=an integer from 2-10,000.    EXAMPLE - No suitable example given.