Graduate theses
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| Title |
Zn-Porphyrin complexes for DSSCs |
| Alternative Title |
Πορφυρινικά σύμπλοκα του ψευδαργύρου με εφαρμογή σε DSSCs |
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Author
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Χαλκιαδάκη, Σοφία
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Thesis advisor
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Κουτσολέλος, Αθανάσιος
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| Abstract |
In times of fossil fuel shortage, increasing crude oil prices, as well as rejection of conventional energy, sustainable energy forms become more and more the focus of attention. Hydropower, wind power, geothermal power, or biomass processing are but a few of these sustainable resources. Another important source for renewable energy is solar power. Photovoltaics and solar thermal collectors are most widely used. Nowadays, dye-sensitized solar cells (DSSCs) have attracted much attention due to their low-cost production and high power conversion efficiencies. They are also called Grätzel cells, named after the Swiss chemist Michael Grätzel who was greatly involved in the development of new cell types. Among various sensitizers for DSSCs, numerous research activities have been focused on porphyrins due to their strong absorption bands in the visible region, versatile modifications of their core, and facile tuning of their electronic structures. Porphyrins, like the chlorophylls in plants, are used as antennae to harvest light so as to be converted to electrical energy by DSSCs. In 2005–2007, Officer and Grätzel et al. had achieved a rapid increase in the power conversion efficiency of porphyrin DSSCs from a few percent to as much as 7%. Encouraged by these pioneering works, further high-performance porphyrin dyes have been developed in the last decade. These studies have provided us profound hints for the rational design of sensitizers toward highly efficient DSSCs. Push–pull structures and/or π-extensions have made porphyrins panchromatic in visible and even near-infrared regions. Consequently, porphyrin sensitizers have exhibited power conversion efficiencies that are comparable to or even higher than those of well-established highly efficient DSSCs based on ruthenium complexes. In this perspective, this thesis presents the synthetic design of Zn-Porphyrins as sensitizers for highly efficient DSSCs. Two complexes are synthesized, one of which via ''click'' reaction in order to establish whether ''Click chemistry'' is suitable for synthesizing dyes for converting solar energy. Both complexes are going to be tested on DSSCs in order to understand their efficiency as dyes.
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| Language |
English |
| Issue date |
2017-03-17 |
| Collection
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School/Department--School of Sciences and Engineering--Department of Chemistry--Graduate theses
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Type of Work--Graduate theses
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| Permanent Link |
https://elocus.lib.uoc.gr//dlib/3/e/2/metadata-dlib-1495032542-416038-5500.tkl
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| Views |
202 |
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