Patent ID: 7888427

Claim:
A method of formulating a latent doping composition comprising: providing at least one polymer comprising conjugation in the polymer backbone, providing at least one dopant for the polymer, providing at least one solvent, formulating the polymer, the dopant, and the solvent to form the composition wherein the composition consists essentially of the polymer, the dopant, and the solvent, and wherein the dopant does not substantially dope the polymer when the composition is formulated, but does substantially react with the polymer when the solvent is removed; wherein the polymer comprises regioregular polythiophene, the dopant is an organic dopant, and the solvent is a polar solvent; wherein the amount of polymer is from about 0.01 wt. % to about 20 wt. %, wherein the amount of dopant is from about 0.01 wt. % to about 6 wt. %, and the amount of solvent is from about 80 wt. % to about 99.9 wt. %, and further comprising the step of removing solvent to form a film of doped polymer.