To elucidate the origin of this hysteresis, the dielectric constants of PM6 (ε = 3.02), Y7 (ε = 3.9), and blended films (ε = 4.1) were measured in the 10-70 GHz frequency range. The detailed extraction method is outlined in additional informantion Section (E). Figure ) displays these extracted dielectric constants, revealing an enhanced dielectric constant in the blended film compared to the individual components. This increase is attributed to the blending process, which creates a partial mismatch between the PM6 polymer chains and Y7 molecules. This mismatch generates additional volume, facilitating dipole reorientation and enhancing coupling among dipoles, leading to a higher dielectric constant .