Time resolved photoluminescence investigations of polyacetylene derivatives

Publisher Website
Google Scholar
Abstract
Time resolvedphotoluminescencedynamics of poly(phenylacetylene)(PPA) and poly(1-phenyl-1-butyl)(PPB) were investigated by using femtosecondluminescence upconversion spectroscopy technique. An ultrafast initial luminescence decay (∼5 ps) was observed for PPA, but it was absent for PPB. The transient luminescence spectrum of PPA exhibits a much larger red-shift (∼140 meV) than that of PPB (∼60 meV). PPB shows a much higher luminescence efficiency than that of PPA. The influence of the substitution on the photoluminescence behaviors of PPA and PPB is discussed.