Interfaces in Dye-Sensitized Electrodes: From Fundamental Understanding to Devices

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MARC

Wrede, Sina,1995-Uppsala universitet,Fysikalisk kemi (author)

Interfaces in Dye-Sensitized Electrodes : From Fundamental Understanding to Devices

BookEnglish2024

Publisher, publication year, extent ...

Uppsala :Acta Universitatis Upsaliensis,2024
120 s.
electronicrdacarrier

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LIBRIS-ID:oai:DiVA.org:uu-527656
ISBN:9789151321523
https://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-527656URI

Supplementary language notes

Language:English
Summary in:English

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SwePubSwePub

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Subject category:vet swepub-contenttype
Subject category:dok swepub-publicationtype

Series

Digital Comprehensive Summaries of Uppsala Dissertations from the Faculty of Science and Technology,1651-6214 ;2411

Notes

Renewable energy solutions are vital in realising a more equitable and sustainable future. Among several solar light harvesting and storage technologies, dye-sensitized electrodes offer a cost-effective and flexible solution for solar cells or solar fuel devices. In order to enhance their solar conversion efficiency, however, the understanding of charge transfer pathways, particularly at the dye-sensitized surface, is crucial. Surface properties and interfacial processes have a great effect on the final device and are the overarching theme of this thesis.Firstly, intermolecular charge transfer across dye-sensitized surfaces was investigated, which play a role in both facilitating charge accumulation and affecting recombination rates and are therefore pivotal factors influencing solar cell efficiencies. Specifically, investigations on nickel oxide (NiO) and ZrO2 surfaces elucidate charge transfer mechanisms across the surface and their dependence on solvent properties, offering possible pathways for optimizing device performance.Due to their significance on dye-sensitized photocathodes, the chemical nature of NiO surface states was explored as they are known to affect charge recombination and the dye-regeneration processes. Spectroscopic insights during controlled atmosphere experiments highlight the influence of surface species generated by oxygen and water molecules on the electronic properties of NiO, particularly of hydroxide and oxygen-related species.Thirdly, the design and characterization of the first reported solid-state p-n tandem dye-sensitized solar cell was demonstrated. Such a cell can surpass the voltage limitations observed in liquid tandem cells and could achieve an open-circuit voltage of 1.4 V. These tandem cells hold promise for applications in solar fuel production, where high potential differences are essential for driving chemical reactions.

Subject headings and genre

NATURVETENSKAP Kemi Fysikalisk kemi hsv//swe
NATURAL SCIENCES Chemical Sciences Physical Chemistry hsv//eng
Photovoltaics
dye-sensitized
charge transfer
liquid-solid interface
surface properties
tandem-cells
Chemistry with specialization in Physical Chemistry
Kemi med inriktning mot fysikalisk kemi

Added entries (persons, corporate bodies, meetings, titles ...)

Tian, Haining,Professor,1983-Uppsala universitet,Fysikalisk kemi(Swepub:uu)haiti806 (thesis advisor)
Hammarström, Leif,Professor,1964-Uppsala universitet,Fysikalisk kemi(Swepub:uu)leifhamm (thesis advisor)
Boschloo, Gerrit,ProfessorUppsala universitet,Fysikalisk kemi(Swepub:uu)gerrbosc (thesis advisor)
Barnes, Piers,LecturerImperial College London (opponent)
Uppsala universitetFysikalisk kemi (creator_code:org_t)

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