Absorption and photoluminescence of a new thienylene–phenylene copolymer

The optical studies are reported of the thin film of 1 thienylene-dialkoxyphenylene copolymer. Absorption spectra were recorded at 300-20 K. The analysis of he relative intensity of zero-phonon and the 0-1 and 0-2 vibronic bands indicates a change in conjugation length with temp. in the PL spectra, and its evolution allows the detn. of the Huang-Rhys factor