Photoinduced absorption spectroscopy of dye-sensitized nanostructured TiO2
2003 (English)In: Chemical Physics Letters, ISSN 0009-2614, E-ISSN 1873-4448, Vol. 370, no 04-mar, 381-386 p.Article in journal (Refereed) Published
Photoinduced absorption (PIA) spectroscopy was used to investigate dye-sensitized electrodes and solar cells under illumination conditions comparable to sunlight. In the absence of redox electrolyte, cis-Ru (dcbpy)(2)(NCS)(2)-sensitized nanostructured TiO2 films show a long-lived photoinduced charge-separation (oxidized dye molecules/injected electrons in TiO2), with a lifetime of about 10(-3) s under full sun illumination. The PIA spectrum of a complete dye-sensitized cell is due to electrons in TiO2 and iodine radicals (12) in the electrolyte. The lifetime of this charge-separated state at open-circuit conditions was determined to be 0.15 s (0.27 sun illumination).
Place, publisher, year, edition, pages
2003. Vol. 370, no 04-mar, 381-386 p.
titanium-dioxide films, charge recombination kinetics, electron-transfer dynamics, solar-cells, states
IdentifiersURN: urn:nbn:se:kth:diva-22300DOI: 10.1016/s0009-2614(03)00029-0ISI: 000181386600014OAI: oai:DiVA.org:kth-22300DiVA: diva2:340998
QC 201005252010-08-102010-08-10Bibliographically approved