Triplet dynamics in pentacene crystals: applications to fission-sensitized photovoltaics.
basic_science · Level V
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- Record sourced from PubMed, PMID 24375546.
- Also identified by DOI 10.1002/adma.201302427.
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Abstract
The decay and transport of triplet excitons photogenerated via singlet exciton fission in polycrystalline and single-crystalline pentacene is reported. Using transient absorption spectroscopy, we find evidence for diffusion-mediated triplet-triplet annihilation. We estimate monomolecular lifetimes, bimolecular annihilation rate constants, and triplet exciton diffusion lengths. We discuss these results in the context of current solar cell device architectures.