Strain Engineering on Thermoelectric Properties in 2,7-Dioctyl[1]benzothieno-[3,2-b][1]benzothiophene

2,7-dioctyl[1]benzothieno[3,2-b][1]benzothiophene (C8-BTBT) is a kind of organic semiconductor materials with high carrier concentrations. In this work, we reported the thermoelectric performances of C8-BTBT under isotropic compressive strain of 5%. The results indicate that the figure of merit (zT) for N-type C8-BTBT could be improved by 17.6% and strain engineering plays an important role in the regulation strategy for thermoelectric materials.