Photovoltaic cell with silole-containing polymer
View Patent ↗Photovoltaic cells with silole-containing polymers, as well as related systems, methods and components are disclosed.
1. An article comprising:
a first electrode;
a second electrode; and
a photoactive material disposed between the first and second electrodes, in which the photoactive material comprises a polymer and a fullerene, wherein the polymer comprises a first comonomer repeat unit and a second comonomer repeat unit different from the first comonomer repeat unit;
wherein
the first comonomer repeat unit comprises a silacyclopentadithiophene moiety of formula (1):
in which each of R 1 , R 2 , R 3 and R 4 , independently, is H, C 1 -C 20 alkyl, C 1 -C 20 alkoxy, C 3 -C 20 cycloalkyl, C 1 -C 20 heterocycloalkyl, aryl, heteroaryl, halo, CN, OR, C(O)R, C(O)OR, or SO 2 R; R being H, C 1 -C 20 alkyl, C 1 -C 20 alkoxy, aryl, heteroaryl, C 3 -C 20 cycloalkyl, or C 1 -C 20 heterocycloalkyl;
the second comonomer repeat unit comprises a thiophene moiety substituted with C 1 -C 20 alkyl, C 1 -C 20 alkoxy, C 3 -C 20 cycloalkyl, C 1 -C 20 heterocycloalkyl, aryl, heteroaryl, halo, CN, OR′, C(O)R′, C(O)OR′, or SO 2 R′; or a thiophene moiety fused with a 1,4-dioxane moiety; R′ being H, C 1 -C 20 alkyl, C 1 -C 20 alkoxy, aryl, heteroaryl, C 3 -C 20 cycloalkyl, or C 1 -C 20 heterocycloalkyl;
the fullerene is a substituted fullerene wherein the substituent is (OCH 2 CH 2 ) 2 CH 3 or OCH 2 CF 2 OCF 2 CF 2 OCF 3 ; and
the article is configured as a photovoltaic cell.
2. An article, comprising:
a first electrode;
a second electrode; and
a photoactive material disposed between the first and second electrodes, in which the photoactive material co rises a polymer and a fullerene, wherein the polymer comprises a first comonomer repeat unit and a second comonomer repeat unit different from the first comonomer repeat unit;
wherein
the first comonomer repeat unit comprises a silacyclopentadithiophene moiety of formula (1):
in which each of R 1 , R 2 , R 3 and R 4 , independently, is H, C 1 -C 20 alkyl, C 1 -C 20 alkoxy, C 3 -C 20 cycloalkyl, C 1 -C 20 heterocycloalkyl, aryl, heteroaryl, halo, CN, OR, C(O)R, C(O)OR, or SO 2 R; R being H, C 1 -C 20 alkyl, C 1 -C 20 alkoxy, aryl, heteroaryl, C 3 -C 20 cycloalkyl, or C 1 -C 20 heterocycloalkyl;
the second comonomer repeat unit is a substituted thiophene moiety;
the fullerene is a substituted fullerene wherein the substituent is (OCH 2 CH 2 ) 2 CH 3 or OCH 2 CF 2 OCF 2 CF 2 OCF 3 ; and
the article is a photovoltaic cell.
3. An article, comprising:
a first electrode;
a second electrode; and
a photoactive material disposed between the first and second electrodes, in which the photoactive material comprises a polymer and a fullerene, wherein the polymer comprises a first comonomer repeat unit and a second comonomer repeat unit different from the first comonomer repeat unit;
wherein
the first comonomer repeat unit comprises a silacyclopentadithiophene moiety of formula (1):
in which R 1 R 2 are C 1 -C 20 alkyl, R 3 and R 4 are H;
the second comonomer repeat unit comprises a thiophene moiety substituted with C 1 -C 20 alkyl, C 1 -C 20 alkoxy, C 3 -C 20 cycloalkyl, C 1 -C 20 heterocycloalkyl, aryl, heteroaryl, halo, CN, OR′, C(O)R′, C(O)OR′, or SO 2 R′; or a thiophene moiety fused with a 1,4-dioxane moiety; R′ being H, C 1 -C 20 alkyl, C 1 -C 20 alkoxy, aryl, heteroarvl, C 3 -C 20 cycloalkyl, or C 1 -C 20 heterocycloalkyl;
the fullerene is a substituted fullerene wherein the substituent is (OCH 2 CH 2 ) 2 CH 3 or OCH 2 CF 2 OCF 2 CF 2 OCF 3 ; and the article is a photovoltaic cell.