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Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 7 of 7 for “"Frenkel exciton"”.
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Simulating exciton dynamics in organic semiconductors
… of organic semiconductors: the transport of Frenkel exciton and dissociation of charge-transfer (CT) exciton. Frenkel excitons are tightly bound electron-hole pairs created upon photo-excitation of molecules and they carry the excess energy imparted by photons.
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Electroabsorption spectroscopy of quasi-one-dimensional organic molecular crystals
… clarify the involvement of the charge-transfer exciton in the lowest excited state. By a self-built experimental setup, two kinds of electroabsorption measurements, called "perpendicular" and "parallel" measurements, were conducted at room temperature in ambient air. The …
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Theoretical Design of Molecular Nanostructures for Exciton Control
… harness control of delocalized excitations, or excitons, via programmed molecular structures. The dynamics of these excitons enable energy and information transfer within molecular networks, positioning chromophore assemblies as ideal candidates for a number of technologies such as solar energy …
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Morphology Effects on the Optical Properties of Phenylene Vinylenes From Nano-Scale to Bulk
… is formed which when excited produces a Frenkel exciton. The side substituted 1,4-bis[4-(3,5-di- tert-butylstyryl)styryl]benzene packs in a face-to-face pattern producing an excimer species when excited. Doping other organic molecules into the DSB caused another intermolecular emitting …
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Fluorescence Enhancement Strategies for Polymer Semiconductors
… the solid-state fluorescence quantum yield, exciton lifetime and exciton diffusion length significantly in comparison to that without phenyl-addition. 2. Energy transfer to a highly fluorescent chromophore It is shown that for the high mobility polymer …
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Ultrafast exciton relaxation in quasi-one-dimensional perylene derivatives
This thesis deals with exciton relaxation processes in thin polycrystalline films and matrix-isolated molecules of the perylene derivatives PTCDA (3,4,9,10-perylenetetracarboxylic dianhydride) and MePTCDI (N,N'-dimethylperylene-3,4,9,10-dicarboximide). Using femtosecond pump-probe spectroscopy, …
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Interactions of Organic Fluorophores with Plasmonic Surface Lattice Resonances
… of Mie-scattering dielectric particles or excitonic nanoparticles.</p> <p>SLRs are another plasmonic mode, in addition to surface plasmons polaritons and LSPRs, through which visible light can be absorbed or scattered. In addition, SLRs in combination with various excitonic materials have …