Patent ID: 8916066

Claim:
A formulation comprising: an organic semiconducting material, wherein the organic semiconducting material is a polymer of a fused thiophene; and a carrier liquid comprising: a first liquid in an amount of 50 to about 90 vol %, the first liquid being a solvent for the organic semiconducting material, the first liquid having a boiling point of at least 180° C., the first liquid being selected from the formulas (III), (II), or mixtures thereof: where each R 1-8 is independently hydrogen, or a saturated or unsaturated, branched or unbranched, substituted or unsubstituted monovalent (C 1-6 )hydrocarbylene; n is independently selected from −1 to 6 and represents a portion of the fused ring size, x is from 0 to 3, and represents the number of rings fused to the first ring; formula (II) comprises formulas (IIa), (IIb), or mixtures thereof: where each R 1-8 is independently hydrogen, a saturated or unsaturated, branched or unbranched, substituted or unsubstituted (C 3-10 )hydrocarbylene, a cyclic (C 3-10 )hydrocarbylene, or a mixture thereof, n and n′ is independently selected from −1 to 6 and represents a portion of the ring size, x is from 0 to 3, and represents the number of additional rings fused to the first ring, and if a fused ring has a bridgehead substituent then the isomer comprises cis-, trans-, or mixtures thereof; and a second liquid in an amount of from 10 to 50 vol % of a saturated or unsaturated cyclic hydrocarbylene compound of the formula (I): where each R 1-6 is independently hydrogen, a saturated or unsaturated, branched or unbranched, substituted or unsubstituted (C 1-15 )hydrocarbylene, a carbonyl (C═O), or a mixture thereof, n is independently selected from 0 to 6 and represents a portion of the saturated or unsaturated ring size, and any unspecified hydrogen substituent is selected from cis-, trans-, or mixtures thereof, the second liquid having a boiling point less than 160° C.