In individual capacitance-voltage (C-V) measurements of PM6 and Y7 films without blending, as depicted in Figure (S5), PM6 exhibited no hysteresis, while Y7 displayed hysteresis attributed to the presence of a quadrupole moment . This underscores the unique dielectric nonlinearity originating from the Y7 molecules in the blended film. The enhanced hysteresis observed in the PM6:Y7 blend is associated with the interface dipole moments, resulting from the reorientation of polarizable dipoles at the interface of the two immiscible phases. This reorientation is triggered by the charge imbalance between the phases and attractive Coulomb force between the dipoles, leading to a more persistent dipole alignment . With increasing applied voltage, these dipole moments aligned more efficiently, consequently reducing the capacitance .