| Title | Spatially and temporally resolved emission from aggregates in conjugated polymers. |
| Publication Type | Journal Article |
| Year of Publication | 1996 |
| Authors | Blatchford, JW, Gustafson, TL, Epstein, AJ, {Vanden D. A.}, B, Kerimo, J, Higgins, DA, Barbara, PF, Fu, D-K, Swager, TM, MacDiarmid, AG |
| Journal | Physical Review B: Condensed Matter |
| Volume | 54 |
| Pagination | R3683–R3686 |
| ISSN | 0163-1829 |
| Keywords | exciton vinylene polymer aggregate fluorescence, lifetime fluorescence vinylene polymer aggregate, polymer conjugated aggregate fluorescence spatial temporal, pyridyl vinylene polymer aggregate fluorescence profile |
| Abstract | The authors present results of cw, time-resolved, and spatially resolved spectroscopic studies of emission and absorption in a model conjugated polymer, poly(p-pyridyl vinylene) (PPyV). The red shifted film spectra suggest the formation of aggregated regions. The ∼4X redn. in emission efficiency in films vs. soln. is attributed to a longer radiative lifetime for aggregate excitons, as is evidenced by time-resolved fluorescence measurements. The authors present direct optical imaging of aggregates in a conjugated polymer via near-field scanning optical microscopy. The aggregate emission and absorption are localized to partially aligned regions of the film ∼200 nm in size. [on SciFinder(R)] |