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Poonia, D. (author)
The present thesis reports the nature of photogenerated charges and their dynamics in layers of transition metal dichalcogenides and their alloys.
doctoral thesis 2023
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Grimaldi, G. (author)
The generation of excited carrier via light absorption (photogeneration) and their ability to propagate in space in Quantum Dot (QD) films affect critically the performance of QD-based optoelectronic devices. The work performed in this thesis is aimed at increasing the understanding of fundamental processes occurring in QD solutions and QD films...
doctoral thesis 2019
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Maheswari, S. (author)
Hybrid halide perovskites are currently the most studied optoelectronic materials. They have been successfully employed as the active material in solar cells. Despite the achieved success of these materials, the properties of these hybrid frameworks of an inorganic lattice that includes organic cations are not fully understood. This is because...
doctoral thesis 2019
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Kulkarni, A. (author)
The aim of this thesis is to study the nature of photoexcitations and carrier multiplication in low-dimensional semiconductors using ultrafast spectroscopy techniques. Ongoing from a macroscopic scale to a nanoscale, the electronic and<br/>optical properties of a material become size dependent, and differ significantly from their bulk...
doctoral thesis 2019
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Bhaskar, P. (author)
This doctoral thesis reports studies on effects of temperature and density on the<br/>mobility and recombination dynamics of charge carriers in low-dimensional van<br/>der Waals materials.
doctoral thesis 2019
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Hutter, E.M. (author)
In this thesis, we have investigated the optoelectronic properties of metal halide perovskites with a special focus on their application in solar cells. In less than a decade of development, metal halide perovskites have yielded solar cells with efficiencies comparable to commercialized technologies. However, there has been limited knowledge...
doctoral thesis 2018
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Spoor, F.C.M. (author)
In semiconductor quantum dots (QDs), charge carrier cooling is in direct competition with carrier multiplication (CM), a process in which one absorbed photon excites two or more electrons that may improve the light conversion efficiency of photovoltaic devices. CM by an initially hot charge carrier occurs in competition with cooling, with the...
doctoral thesis 2018
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Gorczak-Vos, N. (author)
Photoinduced charge transfer in organic materials is a fundamental process in various biological and technological areas. Donor-bridge-acceptor (DBA) molecules are used as model systems in numerous theoretical and experimental work to systematically study and unravel the underlying mechanisms of charge transfer. Despite the respectable successes...
doctoral thesis 2016
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Aulin, Y.V. (author)
The Sun is the main source of renewable energy on Earth. Our planet receives about 174 PW of solar power. At the same time, global energy consumption from all energy sources is orders of magnitude lower and is equal to approximately 16 TW. Clearly, solar energy has a tremendous potential, as well as numerous advantages over conventional sources...
doctoral thesis 2016
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Aerts, M. (author)
Thesis about the charge carrier dynamics in PbSe and PbS semiconductor nanocrystals. The main goal of the research is to assess their potential as new materials for high-efficiency solar cells. The nanocrystals under investigation consist of PbSe quantum dots (Ch 2), PbSe nanorods (Ch 3 & 4) and PbS nanosheets (Ch 6), and the spectroscopic...
doctoral thesis 2015
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Kunneman, L.T. (author)
doctoral thesis 2015
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Boehme, S.C. (author)
This study reports on fundamental processes in Quantum-Dot Solids, after light absorption. Transient Absorption and Time-resolved Photoluminescence spectrocopy reveal the dynamics of charge transfer and charge trapping processes. Typically, both occur on a picosecond time scale and compete with each other. We find that the efficiency of these...
doctoral thesis 2015
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Fravventura, M.C. (author)
This research focuses on the investigation of the opto-electronic properties of a variety of organic and inorganic materials of interest for photovoltaics. Fundamental knowledge on the parameters that play an important role in the process of charge photogeneration is achieved by application of a number of experimental methods, the most relevant...
doctoral thesis 2014
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Ten Cate, S. (author)
doctoral thesis 2014
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Dharmapura Hanumantharaya, M.K. (author)
doctoral thesis 2014
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Gao, Y. (author)
Semiconductor nanocrystals (NCs), which can have a variety of sizes, shapes and chemical compositions, will be a large and important family of future advanced materials.This thesis focuses on colloidal semiconductor NC solids, also called quantum-dot (QD) solids, which are promising materials for many applications, such as photo-detectors, field...
doctoral thesis 2012
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Patwardhan, S. (author)
The field of organic electronics has been thriving for the last decades due to growing commercial interest. One of the advantages of using organic materials as semiconductors is the possibility to tune their optoelectronic properties by modifying the chemical structure and organization of the building blocks. In this thesis, the properties of...
doctoral thesis 2011
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Kocherzhenko, A.A. (author)
How does classical reality emerge from quantum mechanics? When does an electron in a molecule stop behaving as a wave and start behaving as a particle? What is the best way to describe the intermediate regime? Can quantum mechanical effects be put to practical use in molecular electronics? These are the questions that this thesis asks and...
doctoral thesis 2011
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Talgorn, E.C.V. (author)
Colloidal semiconductor nanoparticles, also called quantum dots, have unique opto-electronic properties that make them promising candidates for many applications such as solar cells, light–emitting diodes, lasers, or biological imaging. One of the most interesting features is that the bandgap energy can be tuned by changing the particle size....
doctoral thesis 2010
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Grzegorczyk, W.J. (author)
The photogeneration and mobility of charge carriers in organic thin films, including bulk heterojunctions (BHJs), have been studied with the time resolved microwave photo-conductance technique (TRMC). The TRMC technique allows the electrodeless measurement of the photoconductance with nanosecond time resolution. The research focuses on the way...
doctoral thesis 2010
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