Global ETD Search
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 9 of 9 for “"organic molecular crystals"”.
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Femtosecond time-resolved spectroscopy of organic molecular crystals
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Chemistry, 1988.
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Electroabsorption spectroscopy of quasi-one-dimensional organic molecular crystals
… spectroscopy on quasi-one-dimensional organic molecular crystals such as PTCDA and MePTCDI vapor deposited thin films to clarify the involvement of the charge-transfer exciton in the lowest excited state. By a self-built experimental setup, two kinds of electroabsorption measurements, …
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Ultrafast Dynamics in Quasi-One-Dimensional Organic Molecular Crystals
Der erste Teil der Arbeit beschäftigt sich mit ultraschnellen Relaxationsprozessen in quasi-eindimensionalen organischen Molekülkristallen. Als Modellsystem wird das Perylenderivat MePTCDI untersucht. Mit verschiedenen Methoden der optischen Ultrakurzzeit-Spektroskopie werden Prozesse der …
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Pharmaceuticals on the Nanoscale: Multi-dimensional Electron Diffraction of Organic Molecular Crystals
… industry, an understanding of both the molecular structure and the microstructure of potential assets holds the key to controlling their physical and chemical properties. In turn, this may influence how a drug is manufactured or the dosage form via which it is delivered. To characterise …
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Dynamics of Phonons in Crystals as Studied by Picosecond Coherent Anti-Stokes Raman Spectroscopy
… dynamics of the motions of ions and molecules in crystals are of fundamental interest, but due to the short correlation times of the motions (generally in the picosecond or subpicosecond range) the study of the dynamics is a difficult experimental problem. At the same time, theoretical progress in …
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Quantum dynamics in condensed phases : charge carrier mobility, decoherence, and excitation energy transfer
… First, we study charge-carrier mobilities in organic molecular crystals, and develop a microscopic theory that describes both the coherent band-like and incoherent hopping transport observed in organic crystals. We investigate the structures of polaron states using a variational scheme, and …
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Towards routine modelling of condensed phases with the accuracy of quantum Diffusion Monte Carlo
Molecular crystals are critical in diverse fields, including organic semiconductors, optoelectronics, medicine, and pharmaceuticals. A primary aim of computational studies in this area is to aid experimental structure determination and predict finite-temperature relative stabilities with …
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Heat transport in Thermoelectric materials: from Layered systems to organic crystals
… to the class of TMD (TaS2 and MoS2) and organic molecular crystals (BTBT, DNTT), using both ab-initio techniques and MD simulations. TMDs have high electrical properties, making them ideal for TE applications, but showed large k that decreases their possible use as TEG. Thus, after a …
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Understanding transport processes of organic semiconductors via magnetic resonance methods
… last decade has witnessed a huge development of organic semiconducting materials, including the boost in the discoveries of new materials for outstanding optoelectronic performance, as well as the rise of new application scenarios such as flexible electronics, biocompatible sensors, and inkjet …