Patent ID: 6870181

Claim:
An organic field effect transistor, comprising: a substrate; a gate electrode, a source electrode and a drain electrode, at least one of said electrodes disposed on the substrate; a dielectric layer in contact with the gate electrode; an organic semiconducting layer in contact with the dielectric layer; the source electrode and the drain electrode in contact with the organic semiconducting layer; a first interface region situated between the gate electrode and the dielectric layer; a second interface region situated between the dielectric layer and the organic semiconducting layer; a third interface region situated between the organic semiconducting layer and the source or drain electrodes; and a bifunctional contact-enhancing agent situated in at least one of said interface regions so as to form a chemical or physical bond between adjacent said layers or said electrodes, said bifunctional contact-enhancing agent comprising one or more materials selected from the group consisting of: (RO) 3 Si(CH 2 ) x SiCl 3 where R is alkyl group containing from 1 to 5 carbon atoms and x is an integer from 12 to 18, (RO) 3 Si(CH 2 ) x Si(OR′) 3 where R and R′ are alkyl groups containing from 1 to 5 carbon atoms and x is an integer from 12 to 18, R(CH 2 ) x R′ where R is selected from the group consisting of thiophene, pyrrole substituted in either the 2 or 3 positions, and chlorosilane and where x is an integer from 12 to 18 and R′ is a reactive organic moiety selected from the group consisting of alcohol, amine, organic acid, and ethene, R(CH 2 ) x R′ where R is selected from the group consisting of thiophene, pyrrole substituted in either the 2 or 3 positions, and chlorosilane and where x is an integer from 12 to 18 and R′ is a nonreactive organic moiety, R(CH═CH) y R′ where R is selected from the group consisting of thiophene, pyrrole substituted in either the 2 or 3 positions, chlorosilane, and amine and where y is an integer from 1 to 9 and R′ is a reactive organic moiety, R(CH═CH) y R′ where R is selected from the group consisting of thiophene, pyrrole substituted in either the 2 or 3 positions, and chlorosilane and where y is an integer from 1 to 9 and R′ is a nonreactive organic moiety, and R(C 6 H 5 ) n R′ where R and R′ is an alcohol, amine or organic acid and n is an integer from 2 to 8.