To quantify the alignment, we measure the flow-induced retardance (birefringence) of the conjugated polymer solution as it flows through the shear and extensional microchannels. This technique has been used to characterize the deformation of polymers as they are subjected to flow . Modern applications of this technique have combined flow birefringence with microfluidics . In particular, the works of Haward with Odell , McKinley , and Shen have demonstrated that flow birefringence can be used to understand properties including relaxation time, polymer extension, and flow instabilities for a variety of complex fluids such as synovial fluid, wormlike micelles, atactic-polystyrene, and cellulose nanocrystal rods. However, this technique has not been applied to conjugated polymer solutions.