Semiconducting compounds and devices incorporating same

1. An electronic, optical or optoelectronic device comprising a polymeric semiconductor component, the polymeric semiconductor component comprising a polymer having the formula:

wherein:

R 1 , R 1′ , R 2 , and R 2′ independently are a C 1-20 alkyl group or a C 1-20 haloalkyl group;

R 3 , R 4 , R 5 , and R 6 independently are H or R 7 , wherein R 7 , at each occurrence, independently is selected from the group consisting of a halogen, CN, a C 1-20 alkyl group, a C 1-20 haloalkyl group, a C 1-20 alkoxy group, and a C 1-20 alkylthio group;

π and π′ independently are an optionally substituted polycyclic aryl group, an optionally substituted polycyclic heteroaryl group, or an optionally substituted conjugated linear linker;

n is an integer ranging from 5 to 10,000; and

x 1 , x 2 , y 1 , and y 2 are real numbers representing mole fractions, wherein 0<x 1 <1, 0<x 2 <1, 0<y 1 <1, 0<y 2 <1, x 1 +x 2 =x, y 1 +y 2 =y, and x+y=1; and

provided that at least one of the following is true: R 1 and R 2 are different from R 1′ and R 2′ , π is different from π′, and R 3 and R 6 are R 7 .

2. The device of claim 1 , wherein π and π′ independently are an optionally substituted heteroaryl group represented by a formula selected from the group consisting of:

wherein:

R 8 , at each occurrence, independently is H or R 7 , wherein R 7 , at each occurrence, independently is selected from the group consisting of a halogen, CN, a C 1-20 alkyl group, a C 1-20 haloalkyl group, a C 1-20 alkoxy group, and a C 1-20 alkylthio group; and

Het, at each occurrence, is a monocyclic moiety including at least one heteroatom in its ring and optionally substituted with 1-3 R 9 groups, wherein R 9 , at each occurrence, independently is selected from the group consisting of a halogen, CN, an oxo group, a C 1-20 alkyl group, a C 1-20 haloalkyl group, a C 1-20 alkoxy group, and a C 1-20 alkylthio group.

3. The device of claim 1 , wherein π and π′ independently are selected from the group consisting of:

wherein:

R 8 , at each occurrence, independently is selected from the group consisting of H, a halogen, CN, a C 1-20 alkyl group, a C 1-20 haloalkyl group, a C 1-20 alkoxy group, and a C 1-20 alkylthio group; and

R 10 , at each occurrence, independently is a C 1-20 alkyl group or a C 1-20 haloalkyl group.

4. The device of claim 1 , wherein π and π′ independently are selected from the group consisting of:

wherein R 8 , at each occurrence, independently is H or R 7 , wherein R 7 , at each occurrence, independently is selected from the group consisting of a halogen, CN, a C 1-20 alkyl group, a C 1-20 haloalkyl group, a C 1-20 alkoxy group, and a C 1-20 alkylthio group.

5. The device of claim 1 , wherein x and y are real numbers representing mole fractions and wherein 0.2<x<0.8 and 0.2<y<0.8, provided that the sum of x and y is about 1.

6. The device of claim 5 , wherein R 3 and R 6 are selected from the group consisting of a C 1-20 alkyl group, a C 1-20 haloalkyl group, a C 1-20 alkoxy group, and a C 1-20 alkylthio group; and R 4 and R 5 are H.

7. The device of claim 6 , wherein π and π′ are

wherein R 8 , at each occurrence, independently is H or a halogen.

8. The device of claim 6 , wherein π and π′ are

wherein R 8 , at each occurrence, independently is selected from the group consisting of H, a halogen, CN, a C 1-20 alkyl group, a C 1-20 haloalkyl group, a C 1-20 alkoxy group, and a C 1-20 alkylthio group; and R 10 , at each occurrence, independently is a C 1-20 alkyl group or a C 1-20 haloalkyl group.

9. The device of claim 6 , wherein π and π′ are

wherein R 10 , at each occurrence, independently is a C 1-20 alkyl group or a C 1-20 haloalkyl group.

10. The device of claim 6 , wherein π and π′ are

wherein R 8 , at each occurrence, independently is selected from the group consisting of H, a halogen, CN, a C 1-20 alkyl group, a C 1-20 haloalkyl group, a C 1-20 alkoxy group, and a C 1-20 alkylthio group.

11. The device of claim 6 , wherein π and π′ are

wherein R 10 , at each occurrence, independently is a C 1-20 alkyl group or a C 1-20 haloalkyl group.

12. The device of claim 1 configured as a thin film transistor comprising a substrate, a source electrode, a drain electrode, a gate electrode, a gate dielectric component, and a polymeric semiconductor component according to claim 1 , wherein the polymeric semiconductor component is in contact with the source electrode and the drain electrode, and the gate dielectric component is in contact with the polymeric semiconductor component on one side and the gate electrode on an opposite side.

13. The device of claim 1 , wherein the polymeric semiconductor component is photoactive.

14. The device of claim 13 configured as a photovoltaic device comprising a substrate, an anode, a cathode, and a photoactive semiconductor component according to claim 11 disposed between the anode and the cathode.

15. The device of claim 14 , wherein the photoactive semiconductor component comprises a blend material comprising an electron acceptor material.