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- W4380551366 abstract "Funneling excitation energy toward lower energy excited states is a key concept in photosynthesis, which is often realized with at most two chemically different types of pigment molecules. However, current synthetic approaches to establish energy funnels, or gradients, typically rely on Förster-type energy-transfer cascades along many chemically different molecules. Here, we demonstrate an elegant concept for a gradient in the excited-state energy landscape along micrometer-long supramolecular nanofibers based on the conjugated polymer poly(3-hexylthiophene), P3HT, as the single component. Precisely aligned P3HT nanofibers within a supramolecular superstructure are prepared by solution processing involving an efficient supramolecular nucleating agent. Employing hyperspectral imaging, we find that the lowest-energy exciton band edge continuously shifts to lower energies along the nanofibers' growth direction. We attribute this directed excited-state energy gradient to defect fractionation during nanofiber growth. Our concept provides guidelines for the design of supramolecular structures with an intrinsic energy gradient for nanophotonic applications." @default.
- W4380551366 created "2023-06-14" @default.
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- W4380551366 date "2023-06-14" @default.
- W4380551366 modified "2023-09-27" @default.
- W4380551366 title "Directed Gradients in the Excited-State Energy Landscape of Poly(3-hexylthiophene) Nanofibers" @default.
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- W4380551366 doi "https://doi.org/10.1021/jacs.3c02117" @default.
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