Fullerene derivatives and related materials, methods, and devices

摘要

The invention relates to improved fullerene derivatives, to methods for their synthesis and any educts or intermediates used in such methods, to compositions and formulations containing fullerene derivatives, to the use of the fullerene derivatives, compositions and formulations in, or for the preparation of, organic electronic (OE) devices like for example organic photovoltaic (OPV) devices or organic photodetectors (OPD), and to OE, OPV and OPD devices comprising, or being prepared from, these fullerene derivatives, compositions or formulations.

主权项

1. A compound of formula I wherein Cn is a fullerene composed of n carbon atoms, optionally with one or more atoms trapped inside, Adduct is a secondary adduct, or a combination of secondary adducts, appended to the fullerene Cn, m is the number of secondary adducts appended to the fullerene Cn, and is 0, an integer ≧1, or a non-integer >0, o is an integer ≧1, R1 to R8 independently of each other,
denote H or a straight-chain, branched or cyclic alkyl group with 1 to 50 C atoms, in which one or more CH2 groups are optionally replaced by —O—, —S—, —C(═O)—, —C(═S)—, —C(═O)—O—, —O—C(═O)—, —S(O)2—, —NR0—, —SiR0R00—, —CF2—, —CHR0═CR00—, —CY1═CY2—or —C≡C—in such a manner that O and/or S atoms are not linked directly to one another, or one or more CH2 or CH3 groups are replaced by a cationic group or an anionic group, and in which one or more H atoms are optionally replaced by F, Cl, Br, I or CN, or R1 to R8 denote a non-aromatic carbo-or heterocyclic group that is saturated or unsaturated, or an aryl or heteroaryl group, wherein each of the aforementioned cyclic groups has 3 to 20 ring atoms, is mono-or polycyclic, contains fused and/or unfused rings, and is optionally substituted by one or more groups RS,
R0 and R00 denote H or an optionally substituted carbyl or hydrocarbyl group with 1 to 40 C atoms,Y1 and Y2 are independently of each other H, F, CI or CN,RS denotes halogen or a straight-chain, branched or cyclic alkyl moiety with 1 to 30 C atoms, in which one or more CH2 groups are optionally replaced by —O—, —S—, —C(O)—, —C(S)—, —C(O)—O—, —O—C(O)—, —S(O)2—, —NR0—, —SiR0R00—, —CF2—, characterized in that in formula I at least one of R5 and R7 is different from H and at least one of R6 and R8 is different from H, and wherein those groups R5, R6, R7 and R8 which are different from H are selected from C1-C50 optionally substituted alkyl groups.