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Even Parity States in Ppv, Polythiophene and Polysilanes
Published online by Cambridge University Press: 16 February 2011
Abstract
Two photon absorptions (TPA) in conjugated polymers with large bond alternation are reinterpreted. TPA to the 2Ag in long chains should be tiny due to cancellation effects, and therefore the observed strong, narrow TPA is to a higher even parity state. We also present the first theoretical evidence for bound biexcitons, and explain recent photoinduced absorption data.
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- Copyright © Materials Research Society 1994