Diketopyrrolopyrrole polymers for use in organic semiconductor devices

A polymer comprising one or more (repeating) unit(s) of the formula A-D, and at least one (repeating) unit(s) which is selected from repeating units of the formula B-D, A-E, and B-E, a polymer comprising one or more (repeating) unit(s) of the formula

• or
• a polymer comprising (repeating) unit(s) of the formula
• wherein
• Ar23 is a group of formula
• Ar30 is a group of formula
• wherein
• R26 and R26′ are independently of each other a C4-C18alkyl group,
• A is a group of formula
• a is 0, or an integer of 1, or 2,
• b is 0, or an integer of 1, or 2,
• p is 0, or an integer of 1, or 2, y is 0, or 1,
• q is 0, or an integer of 1, or 2, s is 0, or 1,
• u is an integer of 1, or 2, t is 0, or 1,
• v is an integer of 1, or 2, w is 0, or 1,
• Ar21, Ar21′, Ar24, Ar24′, Ar25, Ar27, Ar29, Ar31, Ar31′, Ar38, Ar34, Ar36, Ar39, Ar1 and Ar1′ are independently of each other a group of formula
• Ar3 and Ar3′ independently of each other have the meaning of Ar1, or are a group of formula
• Ar2, Ar2′, Ar26, Ar28, Ar33, Ar35, Ar37, Ar32, Ar32′, Ar22 and Ar22′ are independently of each other a group of formula
• one of X1 and X2 is N and the other is CH,
• one of X3 and X4 is N and the other is CR3′,
• R1, R2, R24 and R25 may be the same or different and are selected from hydrogen, a C1-C100alkyl group, a C6-C24aryl, which can be substituted one to three times with C1-C8alkyl, C1-C8thioalkoxy, and/or C1-C8alkoxy, or pentafluorophenyl,
• R3 and R3′ are independently of each other a C1-C25alkyl group, which may optionally be interrupted by one or more oxygen atoms, and
• B, D and E are independently of each other a group of formula
• or formula I, with the proviso that in case B, D and E are a group of formula I, they are different from A, wherein
• k is 1,
• l is 0, or 1,
• r is 0, or 1,
• z is 0, or 1, and
• Ar4, Ar5, Ar6 and Ar7 are independently of each other a group of formula
• wherein one of X5 and X6 is N and the other is CR14,
• c is an integer of 1, 2, or 3,
• d is an integer of 1, 2, or 3,
• Ar8 and Ar8′ are independently of each other a group of formula
• X1 and X2 are as defined above,
• R1″ and R2″ may be the same or different and are selected from hydrogen, a C1-C36alkyl group, especially a C6-C24alkyl group, a C6-C24aryl, which can be substituted one to three times with C1-C8alkyl, C1-C8thioalkoxy, and/or C1-C8alkoxy, or pentafluorophenyl,
• R14, R14′, R17 and R17′ are independently of each other H, or a C1-C25alkyl group,
• especially a C6-C25alkyl, which may optionally be interrupted by one or more oxygen atoms, wherein A, B, D and E are different from each other.