Faraday communications. In situ electron paramagnetic resonance spectra of n- and p-doped poly(benzo[c]thiophene) films

Abstract

In situ EPR spectra for both p- and n-doped poly(benzo[c]thiophene)(PBCT) thin films are reported. Simplistic interpretation of the spectra, based on spin–orbit coupling constants, suggests negligible participation of sulfur orbitals in both the HOMO and LUMO. In the latter case, this is at variance with prediction. The spin concentration shows a maximum with doping in either sense. This is anticipated from spectroelectrochemical data for p-doped, but not n-doped, PBCT.