Conjugated polymers
AssigneeMerck Patent GmbH
InventorsWilliam Mitchell, Nicolas Blouin, Amy Phillips, Steven Tierney, Miguel Carrasco-Orozco, Toby Cull
Life of this patent
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Abstract
The invention relates to novel polymers containing one or more 4,8-dioxycarbonylalkyl-benzo[1,2-b:4,5-b′]dithiophene repeating units or their thioester derivatives, methods for their preparation and monomers used therein, blends, mixtures and formulations containing them, the use of the polymers, blends, mixtures and formulations as semiconductor in organic electronic (OE) devices, especially in organic photovoltaic (OPV) devices, and to OE and OPV devices comprising these polymers, blends, mixtures or formulations.
Claims24
A polymer comprising one or more divalent units of formula I
- wherein
- X1, X2, X3, X4 denote independently of each other, and on each occurrence identically or differently O or S,
- R1, R2 denote independently of each other, and on each occurrence identically or differently, straight-chain, branched or cyclic alkyl with 1 to 30 C atoms, preferably 1 to 20 C atoms, in which one or more non-adjacent C atoms are optionally replaced by —O—, —S—, —C(O)—, —C(S)—, —C(O)—O—, —C(S)—O—, —C(S)—S—, —C(O)—S—, —O—C(O)—, —O—C(S)—, —S—C(S)—, —S—C(O)—, —CH═CH— or —C≡C— and which are unsubstituted or substituted by F, Cl, Br, I or CN,
- R3, R4 denote independently of each other, and on each occurrence identically or differently, H, halogen, or an optionally substituted carbyl or hydrocarbyl group, wherein one or more C atoms are optionally replaced by a hetero atom.
A monomer of formula VI
- R5—(Ar1)a—U-(Ar2)b—R6 VI
- wherein
- U is a unit of formula I,
- Ar1 and Ar2 are, on each occurrence identically or differently, and independently of each other, aryl or heteroaryl that is different from U, preferably has 5 to 30 ring atoms and is optionally substituted, preferably by one or more groups RS,
- RS is on each occurrence identically or differently F, Br, Cl, —CN, —NC, —NCO, —NCS, —OCN, —SCN, —C(O)NR0R00, —C(O)X0, —C(O)R0, —C(O)OR0, —NH2, —NR0R00, —SH, —SR0, —SO3H, —SO2R0, —OH, —NO2, —CF3, —SF5, optionally substituted silyl, carbyl or hydrocarbyl with 1 to 40 C atoms that is optionally substituted and optionally comprises one or more hetero atoms, or P-Sp-,
- R0 and R00 are independently of each other H or optionally substituted C1-40 carbyl or hydrocarbyl,
- P is a polymerisable or crosslinkable group,
- Sp is a spacer group or a single bond,
- X0 is halogen, preferably F, Cl or Br,
- a and b are on each occurrence identically or differently 0, 1 or 2,
- R5 and R6 are selected from Cl, Br, I, O-tosylate, O-triflate, O-mesylate, O-nonaflate, —SiMe2F, —SiMeF2, —O—SO2Z1, —B(OZ2)2, —CZ3═C(Z3)2, —C≡CH, —C≡CSi(Z1)3, —ZnX0 and —Sn(Z4)3,
- X0 is halogen, preferably Cl, Br or I, and
- Z1-4 are selected from the group consisting of alkyl and aryl, each being optionally substituted, and two groups Z2 may also together form a cyclic group.
Dependencies are inferred from the claim text.