Photoinduced absorption spectroscopy as a tool in the study of dye-sensitized solar cells
2008 (English)In: Inorganica Chimica Acta, ISSN 0020-1693, E-ISSN 1873-3255, Vol. 361, no 3, 729-734 p.Article in journal (Refereed) Published
Photoinduced absorption (PIA) spectroscopy, where the excitation is provided by a square-wave modulated (on/off) monochromatic light source, is a versatile tool in the study of dye-sensitized solar cells. Spectra of transient species, such as the oxidized dye, can easily be obtained and their kinetics can be explored using frequency or time-resolved techniques. Experimental PIA conditions can be kept close to typical solar cell operating conditions, allowing extraction of relevant time constants. PIA is also a suitable method to study the quality of pore filling in case of solid hole conductors. Dye molecules that are not in direct contact with the hole conductor will have long lifetimes in their oxidized state and appear clearly in the PIA spectrum. The basic principles of PIA are explained using the example of electron injection and recombination in dye-sensitized TiO2 in the absence of redox electrolyte.
Place, publisher, year, edition, pages
2008. Vol. 361, no 3, 729-734 p.
IdentifiersURN: urn:nbn:se:kth:diva-17410DOI: 10.1016/j.ica.2007.05.040ISI: 000254426600019OAI: oai:DiVA.org:kth-17410DiVA: diva2:335454
QC 201005252010-08-052010-08-05Bibliographically approved