Figure 4
From: Electronic properties and optical spectra of donor–acceptor conjugated organic polymers
The imaginary part of the dielectric function (\(\varepsilon _2(\omega )\)) for the 3D organic polymers of PE, PET, PCPDT-BT, PCPDT-TTQ, PCPDT-TQ, and PCPDT-BBT computed using PBE, HSE06 and BSE method. The first exciton peak and the experimental optical gap (in parenthesis)14,33,45,46,47 obtained from the absorption onset are also shown. Inset in PET and PCPDT-TTQ shows the first exciton peak computed at BSE and HSE06, respectively.
