Observation of Multiexponential Pico- to Subnanosecond Electron Injection in Optimized Dye-Sensitized Solar Cells with Visible-Pump Mid-Infrared-Probe Transient Absorption Spectroscopy

We compare visible-pump mid-infrared-probe femtosecond measurement of electron injection on dye-sensitized mesoporous TiO2 films immersed in neat solvent or in I–/I3 – electrolyte. Results are presented for the Ru-polypyridyl dyes N3 and N719 and the organic dye D149. Using N719 and the type of elec...

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Veröffentlicht in:	Journal of physical chemistry. C 2013-01, Vol.117 (1), p.116-123
Hauptverfasser:	Juozapavicius, Mindaugas, Kaucikas, Marius, van Thor, Jasper J, O’Regan, Brian C
Format:	Artikel
Sprache:	eng
Schlagworte:	Applied sciences Condensed matter: electronic structure, electrical, magnetic, and optical properties Energy Exact sciences and technology Fullerenes and related materials Infrared and raman spectra and scattering Natural energy Optical properties and condensed-matter spectroscopy and other interactions of matter with particles and radiation Photovoltaic conversion Physics Solar cells. Photoelectrochemical cells Solar energy Visible and ultraviolet spectra
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Zusammenfassung:	We compare visible-pump mid-infrared-probe femtosecond measurement of electron injection on dye-sensitized mesoporous TiO2 films immersed in neat solvent or in I–/I3 – electrolyte. Results are presented for the Ru-polypyridyl dyes N3 and N719 and the organic dye D149. Using N719 and the type of electrolyte required to make efficient and stable dye sensitized solar cells (DSSCs), we find multiple exponential injection dynamics, ranging from
ISSN:	1932-7447 1932-7455
DOI:	10.1021/jp309732z