TITLE

Determining exciton bandwidth and film microstructure in polythiophene films using linear absorption spectroscopy

AUTHOR(S)
Clark, Jenny; Chang, Jui-Fen; Spano, Frank C.; Friend, Richard H.; Silva, Carlos
PUB. DATE
April 2009
SOURCE
Applied Physics Letters;4/20/2009, Vol. 94 Issue 16, p163306
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
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.
ACCESSION #
38225305

 

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