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Interfaces in Dye-S...
Interfaces in Dye-Sensitized Solar Cells Studied with Photoelectron Spectroscopy at Elevated Pressures
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- Kaufmann Eriksson, Susanna, 1983- (författare)
- Uppsala universitet,Fysikalisk kemi
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- Hagfeldt, Anders (preses)
- Uppsala universitet,Fysikalisk kemi
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- Rensmo, Håkan (preses)
- Uppsala universitet,Molekyl- och kondenserade materiens fysik
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- Johansson, Erik (preses)
- Uppsala universitet,Fysikalisk kemi
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- Schnadt, Joachim (opponent)
- Lund University, Division of Synchrotron Radiation Research
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(creator_code:org_t)
- ISBN 9789155490225
- Uppsala : Acta Universitatis Upsaliensis, 2014
- Engelska 75 s.
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Serie: Digital Comprehensive Summaries of Uppsala Dissertations from the Faculty of Science and Technology, 1651-6214 ; 1173
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Abstract
Ämnesord
Stäng
- With an increasing demand for renewable energy sources, research efforts on different solar cell technologies are increasing rapidly. The dye-sensitized solar cell (DSC) is one such technology, taking advantage of light absorption in dye molecules. The liquid based DSC contains several interesting and important interfaces, crucial for the understanding and development of the solar cell performance. Examples of such interfaces include dye-semiconductor, electrode-electrolyte and solute-solvent interfaces. Ultimately, complete interfaces with all these components included are of particular interest. One major challenge is to understand the key functions of these systems at an atomic level and one way to achieve this is to use an element specific and surface sensitive tool, such as photoelectron spectroscopy (PES). This thesis describes the use and development of PES for studying interfaces in the DSC.The materials part of the thesis focuses on interfaces in DSCs studied with PES and the methodology development parts focus on methods to use PES for investigations of solvated heterogeneous interfaces of interest for photoelectrochemical systems such as the DSC. More specifically, beginning with standard vacuum techniques, dye molecules bound to a semiconductor surface have been studied in terms of energy level alignment, surface coverage and binding configuration. To increase the understanding of solvation phenomena present in the liquid DSC, liquid jet experiments have been performed in close combination with theoretical quantum calculations. As a step towards an in-situ method to measure a complete, functioning (in operando) solar cell, methodology development and measurements performed with higher sample pressures are described using new high pressure X-ray photoelectron spectroscopy techniques (HPXPS).
Ämnesord
- NATURVETENSKAP -- Kemi -- Fysikalisk kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Physical Chemistry (hsv//eng)
Nyckelord
- Dye-sensitized solar cells
- interfaces
- solvation
- photoelectron spectroscopy
- HPXPS
- HP-HAXPES
- liquid jet
- Chemistry with specialization in Physical Chemistry
- Kemi med inriktning mot fysikalisk kemi
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- dok (ämneskategori)
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