Thin film semiconductor comprising a small-molecular semiconducting compound and a non-conductive polymer

1. A thin film semiconductor comprising a compound of the following formula I or II:

wherein:

R 1 and R 2 , at each occurrence, independently are selected from the group consisting of a C 1-30 alkyl group, a C 2-30 alkenyl group, a C 2-30 alkynyl group, and a C 1-30 haloalkyl group,

R 3 , R 4 , R 5 , and R 6 independently are H or an electron-withdrawing group, wherein at least one of R 3 , R 4 , R 5 , and R 6 is an electron-withdrawing group; and

a non-conductive polymer,

wherein the non-conductive polymer is poly(methylmethacrylate), and

wherein a weight ratio of the compound of the formula I or II to the non-conductive polymer in the thin film semiconductor is from 5:1 to 1:5.

2. The thin film semiconductor of claim 1 , wherein R 1 and R 2 , at each occurrence, are selected from the group consisting of a C 1-12 alkyl group and a C 1-12 haloalkyl group.

3. The thin film semiconductor of claim 1 , wherein each of R 3 , R 4 , R 5 , and R 6 is selected from the group consisting of H, F, Cl, Br, I, and —CN.

4. The thin film semiconductor of claim 1 , wherein each of R 3 and R 4 is Br or CN and R 5 and R 6 are H.

5. The thin film semiconductor of claim 1 , wherein each of R 3 and R 6 is Br or —CN and R 4 and R 5 are H.

6. The thin film semiconductor of claim 1 , wherein the compound has the following formula Ia or formula Ib:

wherein R′, R″ are, at each occurrence, selected from the group consisting of a C 1-12 alkyl group and a C 1-12 haloalkyl group, and

R 3 , R 4 , and R 6 are as defined in claim 1 .

7. The thin film semiconductor of claim 1 , wherein the compound of the formula I is

8. The thin film semiconductor of claim 1 , wherein the compound of formula II is

9. A solution comprising at least one compound of the following formula I or II:

wherein:

R 1 and R 2 each independently, are selected from the group consisting of a C 1-30 alkyl group, a C 2-30 alkenyl group, a C 2-30 alkynyl group, and a C 1-30 haloalkyl group,

R 3 , R 4 , R 5 , and R 6 each independently, are H or an electron-withdrawing group, wherein at least one of R 3 , R 4 , R 5 , and R 6 is an electron-withdrawing group,

a non-conductive organic polymer, and

a solvent,

wherein the non-conductive organic polymer is poly(methylmethacrylate), and

wherein a weight ratio of the compound of the formula I or II to the non-conductive organic polymer in the solution is from 5:1 to 1:5.