Figure 4: VASE measurements of an C16IDT-BT film.
From: Molecular origin of high field-effect mobility in an indacenodithiophene–benzothiadiazole copolymer

The imaginary part of the dielectric function based on a uniaxial model.
From: Molecular origin of high field-effect mobility in an indacenodithiophene–benzothiadiazole copolymer
The imaginary part of the dielectric function based on a uniaxial model.