Semiconductor composition for high performance organic devices

A method of forming a copolymer comprising

• mixing, in an environment that is substantially free of oxygen gas, a first compound of the formula:
• wherein the carbon-carbon double bond is in the E-configuration, d represents a number from 1 to about 4, and M represents:
• Sn(Me)3, Sn(Bu)3, or B(OH)2,
• with a second compound of the formula:
• wherein R1 and R2 are independently selected from a hydrogen, a substituted or unsubstituted alkyl group, a substituted or unsubstituted aryl group, or a substituted or unsubstituted heteroaryl group, X and Y are independently selected from O, S or Se,
• adding a solvent that is substantially free of oxygen gas to dissolve the mixture;
• adding an aryl bromide or heteroaryl bromide to the mixture and allowing the first compound to react with the second compound to form the copolymer;
• and
• collecting the copolymer.

A semiconductor composition, the semiconducting composition comprising a solvent and a copolymer represented by the structure:

• wherein R1 and R2 are independently selected from a hydrogen, a substituted or unsubstituted alkyl group, a substituted or unsubstituted aryl group, or a substituted or unsubstituted heteroaryl group;
• Ar1 and Ar2 are independently a heteroaromatic group comprising about 4 to about 30 carbon atoms, and can be optionally substituted;
• a and b are each 1;
• Ar3 and Ar4 are independently selected from the group consisting of:
• which can be optionally substituted with an alkyl or halogen, wherein
• X is independently O, S or Se;
• Z is H or F;
• and
• R3 is an alkyl or substituted alkyl group;
• c and e are each 1;
• d is 1 to 4 and the carbon-carbon double bond is in the E-configuration;
• and
• n represents a number from 2 to about 5,000.

An electronic device, comprising as a layer or coating in the electronic device a copolymer represented by the structure:

• wherein R1 and R2 are independently selected from a hydrogen, a substituted or unsubstituted alkyl group, a substituted or unsubstituted aryl group, or a substituted or unsubstituted heteroaryl group;
• Ar1 and Ar2 are independently a heteroaromatic group comprising about 4 to about 30 carbon atoms, and can be optionally substituted;
• a and b are each 1;
• Ar3 and Ar4 are independently selected from the group consisting of:
• which can be optionally substituted with an alkyl or halogen, wherein
• X is independently O, S or Se;
• Z is H or F;
• and
• R3 is an alkyl or substituted alkyl group;
• c and e are each 1;
• d is 1 to 4 and the carbon-carbon double bond is in the E-configuration;
• and
• n represents a number from 2 to about 5,000.