Semiconducting polymers
Novel semiconducting photovoltaic polymers with conjugated units that provide improved solar conversion efficiency that can be used in electro-optical and electric devices. The polymers exhibit increased solar conversion efficiency in solar devices.
1. A semiconducting polymer of formula (V):
where X 1 and X 2 are independently selected from the group consisting of O, S, NH, and CH 2 ;
R 1 and R 2 are independently selected from the group consisting of H, alkyl, alkoxy, aryl, aryloxy, heteroaryl, heteroaryloxy, a cross-linkable moiety, and oligo (ethylene glycol);
each of Y 1 , Y 2 , Y 3 , and Y 4 is;
Z is selected from the group consisting of an ester, ketone, amide, cyano, alkyl, polyfluoroalkyl, polychloroalkyl, aryl, and heteroaryl;
W is selected from the group consisting of H, halogen, cyano, dicyanovinyl, and tricyanovinyl; and
n is an integer greater than 0.
2. The semiconducting polymer of claim 1 , where at least one of R 1 and R 2 is 2-ethylhexyl.
3. The semiconducting polymer of claim 1 , where Z is an ester.
4. The semiconducting polymer of claim 1 , where Z is —C(O)OCH 2 CH(C 2 H 5 )C 4 H 9 .
5. The semiconducting polymer of claim 1 , where W is selected from the group consisting of H and F.
6. The semiconducting polymer of claim 1 , which is of the formula:
where R 1 and R 2 , and R 3 are independently selected from the group consisting of H, alkyl, alkoxy, aryl, aryloxy, heteroaryl, heteroaryloxy, a cross-linkable moiety, and oligo (ethylene glycol).
7. The semiconducting polymer of claim 6 , where R 1 , R 2 , and R 3 are independently 2-ethylhexyl.
8. The semiconducting polymer of claim 1 , where n is from about 1 to about 200.
9. A composition comprising the semiconducting polymer of claim 1 and an electron-withdrawing fullerene derivative.
10. The composition of claim 9 , where the electron-withdrawing fullerene derivative is selected from the group consisting of [6,6]-phenyl-C 61 -butyric acid methyl ester and [6,6]-phenyl-C 71 -butyric acid methyl ester.
11. A device selected from the group consisting of a solar cell, an optical device, an electroluminescent device, a photovoltaic cell, semiconducting cell, and photodiode, comprising the semiconducting polymer of claim 1 .
12. The semiconducting polymer of claim 3 , where W is H.
13. The semiconducting polymer of claim 3 , where W is F.
14. The semiconducting polymer of claim 4 , where W is H.
15. The semiconducting polymer of claim 4 , where W is F.
16. A device selected from the group consisting of a solar cell, an optical device, an electroluminescent device, a photovoltaic cell, semiconducting cell, and photodiode, comprising the semiconducting polymer of claim 12 .
17. A device selected from the group consisting of a solar cell, an optical device, an electroluminescent device, a photovoltaic cell, semiconducting cell, and photodiode, comprising the semiconducting polymer of claim 13 .
18. A device selected from the group consisting of a solar cell, an optical device, an electroluminescent device, a photovoltaic cell, semiconducting cell, and photodiode, comprising the semiconducting polymer of claim 14 .
19. A device selected from the group consisting of a solar cell, an optical device, an electroluminescent device, a photovoltaic cell, semiconducting cell, and photodiode, comprising the semiconducting polymer of claim 15 .
20. A device selected from the group consisting of a solar cell, an optical device, an electroluminescent device, a photovoltaic cell, semiconducting cell, and photodiode, comprising the semiconducting polymer of claim 4 .