Endre søk
RefereraExporteraLink to record
Permanent link

Direct link
Referera
Referensformat
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annet format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annet språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf
Efficient Organic-Dye-Sensitized Solar Cells Based on an Iodine-Free Electrolyte
KTH, Skolan för kemivetenskap (CHE), Kemi, Organisk kemi.
KTH, Skolan för kemivetenskap (CHE), Kemi, Organisk kemi.
KTH, Skolan för kemivetenskap (CHE), Kemi, Oorganisk kemi (stängd 20110630).
KTH, Skolan för kemivetenskap (CHE), Kemi, Oorganisk kemi (stängd 20110630).
Vise andre og tillknytning
2010 (engelsk)Inngår i: Angewandte Chemie International Edition, ISSN 1433-7851, E-ISSN 1521-3773, Vol. 49, nr 40, s. 7328-7331Artikkel i tidsskrift (Fagfellevurdert) Published
sted, utgiver, år, opplag, sider
2010. Vol. 49, nr 40, s. 7328-7331
Emneord [en]
organic dyes, photoelectrochemistry, redox chemistry, solar cells, thiadiazoles
HSV kategori
Identifikatorer
URN: urn:nbn:se:kth:diva-46681DOI: 10.1002/anie.201003740ISI: 000282916800034Scopus ID: 2-s2.0-77957375686OAI: oai:DiVA.org:kth-46681DiVA, id: diva2:454114
Forskningsfinansiär
Swedish Research CouncilKnut and Alice Wallenberg FoundationStandUp
Merknad

QC 20111105

Tilgjengelig fra: 2011-11-05 Laget: 2011-11-04 Sist oppdatert: 2017-12-08bibliografisk kontrollert
Inngår i avhandling
1. Liquid Redox Electrolytes for Dye-Sensitized Solar Cells
Åpne denne publikasjonen i ny fane eller vindu >>Liquid Redox Electrolytes for Dye-Sensitized Solar Cells
2012 (engelsk)Doktoravhandling, med artikler (Annet vitenskapelig)
Abstract [en]

This thesis focuses on liquid redox electrolytes in dye-sensitized solar cells (DSCs). A liquid redox electrolyte, as one of the key constituents in DSCs, typically consists of a redox mediator, additives and a solvent. This thesis work concerns all these three aspects of liquid electrolytes, aiming through fundamental insights to enhance the photovoltaic performances of liquid DSCs.

Initial attention has been paid to the iodine concentration effects in ionic liquid (IL)-based electrolytes. It has been revealed that the higher iodine concentration required in IL-based electrolytes can be attributed to both triiodide mobility associated with the high viscosity of the IL, and chemical availability of triiodide. The concept of incompletely solvated ionic liquids (ISILs) has been introduced as a new type of electrolyte solvent for DSCs. It has been found that the photovoltaic performance of ISIL-based electrolytes can even rival that of organic solvent-based electrolytes. And most strikingly, ISIL-based electrolytes provide highly stable DSC devices under light-soaking conditions, as a result of the substantially lower vapor pressure of the ISIL system. A significant synergistic effect has been observed when both guanidinium thiocyanate and N-methylbenzimidazole are employed together in an IL-based electrolyte, exhibiting an optimal overall conversion efficiency.

Tetrathiafulvalene (TTF) has been investigated as an organic iodine-free redox couple in electrolytes for DSCs. An unexpected worse performance has been observed for the TTF system, albeit it possesses a particularly attractive positive redox potential. An organic, iodine-free thiolate/disulfide system has also been adopted as a redox couple in electrolytes for organic DSCs. An impressive efficiency of 6.0% has successfully been achieved by using this thiolate/disulfide redox couple in combination with a poly (3, 4-ethylenedioxythiophene) (PEDOT) counter electrode material under full sunlight illumination (AM 1.5G, 100 mW/cm2). Such high efficiency can even rival that of its counterpart DSC using a state-of-the-art iodine-based electrolyte in the systems studied.The cation effects of lithium, sodium and guanidinium ions in liquid electrolytes for DSCs have been scrutinized. The selection of the type of cations has been found to exert quite different impacts on the conduction band edge (CB) of the TiO2 and also on the electron recombination kinetics, therefore resulting in different photovoltaic behavior.

sted, utgiver, år, opplag, sider
Stockholm: KTH Royal Institute of Technology, 2012. s. 60
Serie
Trita-CHE-Report, ISSN 1654-1081 ; 2012:2
Emneord
dye-sensitized solar cells, electrolytes, ionic liquids, redox couples, additives
HSV kategori
Identifikatorer
urn:nbn:se:kth:diva-64139 (URN)978-91-7501-231-5 (ISBN)
Disputas
2012-02-16, F3, Lindstedtsvägen 26, KTH, Stockholm, 10:00 (finsk)
Opponent
Veileder
Merknad
QC 20120124Tilgjengelig fra: 2012-01-24 Laget: 2012-01-24 Sist oppdatert: 2012-01-24bibliografisk kontrollert

Open Access i DiVA

Fulltekst mangler i DiVA

Andre lenker

Forlagets fulltekstScopus

Personposter BETA

Sun, Licheng

Søk i DiVA

Av forfatter/redaktør
Tian, HainingJiang, XiaoYu, ZeKloo, LarsHagfeldt, AndersSun, Licheng
Av organisasjonen
I samme tidsskrift
Angewandte Chemie International Edition

Søk utenfor DiVA

GoogleGoogle Scholar

doi
urn-nbn

Altmetric

doi
urn-nbn
Totalt: 54 treff
RefereraExporteraLink to record
Permanent link

Direct link
Referera
Referensformat
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annet format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annet språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf