Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Studies of Semiconductors Modified with Nanoscale Light Absorbers for Solar Cell Application
Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Physics.
2004 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

Recently, materials such as hole conductors (CuI, CuSCN) and light absorbers (Ru-complexes, CuInS2) have been actively investigated for application in nanocrystalline solar cells. In this thesis combinations of these materials have been studied.

In the first part of the thesis, various methods were applied to characterize the electronic structure and photoconversion mechanism of the dye molecule Ru(dcbpyH2)2(NCS)2 when combined with materials for the use in photovoltaic devices. Specifically, the adsorption and electronic structure of the dye molecules adsorbed to semiconductors were investigated by means of photoelectron spectroscopy. The results indicate a chemical bond between the dye molecules and the hole conductors (CuI, CuSCN) via the NCS- groups. In addition, preparation of a TiO2/Ru-dye/CuI solid state model system was studied in situ. These experiments showed a partial breaking of the TiO2-dye bond caused by CuI evaporation. Photovoltage measurements were also performed. These investigations showed a shift in the light absorption threshold of the dye molecules adsorbed onto the hole conductors (CuI and CuSCN), indicating new defect states at the dye/CuSCN interface. Also, charge accumulation and transport in solar cells with CuSCN were compared to liquid electrolyte cells. Measurements showed that the lifetime and transport time of electrons in solar cells with CuSCN are much shorter than in electrolyte cells.

In the second part of the thesis, the deposition of CuInS2 onto various metal oxides by spray pyrolysis has been studied with x-ray diffraction and photoelectron spectroscopy. The measurements showed that the morphologies of the substrates play a significant role in the formation of CuInS2 layers. Also, the presence of CdS at TiO2 has a positive influence on the formation of CuInS2.

Place, publisher, year, edition, pages
Uppsala: Acta Universitatis Upsaliensis , 2004. , p. 44
Series
Comprehensive Summaries of Uppsala Dissertations from the Faculty of Science and Technology, ISSN 1104-232X ; 1021
Keywords [en]
Physics, photoelectron spectroscopy, dye-sensitized, solar cells, inorganic light absorber, nanostructure, mesoporous, photovoltaic devices
Keywords [sv]
Fysik
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:uu:diva-4581ISBN: 91-554-6054-2 (print)OAI: oai:DiVA.org:uu-4581DiVA, id: diva2:165206
Public defence
2004-11-05, Polhemsalen, Ångströmlaboratoriet, Uppsala, 10:15
Opponent
Supervisors
Available from: 2004-10-07 Created: 2004-10-07Bibliographically approved

Open Access in DiVA

fulltext(647 kB)2661 downloads
File information
File name FULLTEXT01.pdfFile size 647 kBChecksum MD5
bef691c194260621142b02b78002b0e73fa79829bfc12b8ecf81b21e7c3c8a13af50f562
Type fulltextMimetype application/pdf
Buy this publication >>

By organisation
Department of Physics
Physical Sciences

Search outside of DiVA

GoogleGoogle Scholar
Total: 2661 downloads
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

isbn
urn-nbn

Altmetric score

isbn
urn-nbn
Total: 1621 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf