Spatially and temporally resolved emission from aggregates in conjugated polymers

被引：110
|
作者：
Blatchford, JW
Gustafson, TL
Epstein, AJ
VandenBout, DA
Kerimo, J
Higgins, DA
Barbara, PF
Fu, DK
Swager, TM
MacDiarmid, AG
机构：
[1] OHIO STATE UNIV, DEPT CHEM, COLUMBUS, OH 43210 USA
[2] UNIV MINNESOTA, DEPT CHEM, MINNEAPOLIS, MN 55455 USA
[3] UNIV PENN, DEPT CHEM, PHILADELPHIA, PA 19104 USA
来源：
PHYSICAL REVIEW B | 1996年 / 54卷 / 06期
关键词：
D O I：
10.1103/PhysRevB.54.R3683
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We 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 redshifted film spectra suggest the formation of aggregated regions. The similar to 4X reduction in emission efficiency in films vs solution is attributed to a longer radiative lifetime for aggregate excitons, as is evidenced by time-resolved fluorescence measurements. We present direct optical imaging of aggregates in a conjugated polymer via near-field scanning optical microscopy. The aggregate emission and absorption are found to be localized to partially aligned regions of the film similar to 200 nm in size.
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页码：R3683 / R3686
页数：4
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