期刊
APPLIED PHYSICS LETTERS
卷 94, 期 16, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.3110904
关键词
aggregates (materials); crystal microstructure; crystallites; excitons; liquid phase deposition; polymer films; ultraviolet spectra; visible spectra
资金
- EPSRC
- NSERC
- Canada Research Chairs program
- NSF [DMR 0606028]
We analyze the linear absorption spectrum of regioregular poly(3-hexylthiophene) films spun from a variety of solvents to probe directly the film microstructure and how it depends on processing conditions. We estimate the exciton bandwidth and the percentage of the film composed of aggregates quantitatively using a weakly interacting H-aggregate model. This provides a description of the degree and quality of crystallites within the film and is in turn correlated with thin-film field-effect transistor characteristics.
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