Unsymmetrical benzothtadiazole-based random copolymers
A random copolymer comprising the monomer units A, B and C. In this random copolymer A comprises B comprises and C comprises an aryl group. Additionally, R1 R2, R3 and R4 are side chains independently selected from the group consisting of: H, Cl, F, CN, alkyl, alkoxy, alkylthio, ester, ketone and aryl groups. X1 and X2 are independently selected from the group consisting of: H, Cl, F, CN, alkyl, alkoxy, ester, ketone, amide and aryl groups.
1. A random copolymer comprising monomer units A, B and C:
wherein A comprises
B comprises
and C comprises an aryl group wherein
R1 R2, R3 and R4 are side chains independently selected from the group consisting of: H, Cl, F, CN, alkyl, alkoxy, alkylthio, ester, ketone and aryl groups; and
X1 and X2 are independently selected from the group consisting of H, Cl, F, CN, alkyl, alkoxy, ester, ketone, amide and aryl groups;
wherein the power conversion efficiency of the copolymer is greater than 9.6%.
2. The random copolymer of claim 1 , wherein the molecular weight ranges from 1,000 to 100,000 kDa.
3. The random copolymer of claim 1 , wherein C is 3,3′-difluoro-2,2′-bithiophene.
4. The random copolymer of claim 1 , wherein the molecular complex is used as photovoltaic material in one or more photovoltaic devices.
5. The random copolymer of claim 4 , wherein the one or more photovoltaic devices are polymer solar cell devices or photodetector devices.
6. The random copolymer of claim 1 , wherein the molecular complex is used as an active layer material in one or more electronic devices.
7. The random copolymer of claim 1 , wherein when used as a photovoltaic polymer produces a power conversion efficiency greater than 7.0%.
8. The random copolymer of claim 1 , wherein when used as a photovoltaic polymer produces a fill factor greater than 69%.
9. The random copolymer of claim 1 , wherein R1 and R2 are not identical.
10. The random copolymer of claim 1 , wherein X1 and X2 are fluorinated.
11. The random copolymer of claim 1 , wherein X1 is a hydrogen and X2 is a chlorine.
12. The random copolymer of claim 1 , wherein the copolymer contains a unit ABC.
13. The random copolymer of claim 1 wherein the copolymer contains a unit ACB.
14. The random copolymer of claim 1 , wherein the copolymer contains a unit BAC.
15. The random copolymer of claim 1 , wherein the copolymer contains a unit BCA.
16. The random copolymer of claim 1 , wherein the copolymer contains a unit CAB.
17. The random copolymer of claim 1 , wherein the copolymer contains a unit CBA.