Patent ID: 8729222

Claim:
A method for forming a semiconductor layer, comprising: depositing a liquid composition onto a substrate to form the semiconducting layer; wherein the liquid composition comprises a semiconducting material selected from Formula (I) or Formula (II): wherein X is independently selected from S and Se in Formula (I) and X is independently selected from S, Se, and O in Formula (II); R 1 is independently selected from hydrogen, alkyl, substituted alkyl, aryl, substituted aryl, heteroaryl, halogen, —CN, —NO 2 , and ethynylsilane; R 2 , R 3 , R 4 , and R 5 are independently selected from hydrogen, alkyl, substituted alkyl, aryl, substituted aryl, heteroaryl, halogen, —CN, and —NO 2 ; Ar and Ar′ are independently a conjugated divalent moiety; a and b are independently integers from 1 to about 10; and n is an integer and is at least 2.