@article{Juozapavicius:2013,
author = {Juozapavicius, M and Kaucikas, M and Dimitrov, SD and Barnes, PRF and van, Thor JJ and O'Regan, BC},
journal = {J Phys Chem C},
title = {Evidence for “Slow” Electron Injection in Commercially Relevant Dye-2 Sensitized Solar Cells by Vis−NIR and IR Pump−Probe Spectroscopy},
year = {2013}
}

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TY  - JOUR
AB  - We present femtosecond to nanosecond transient absorption (TA)data on electron injection in dye-sensitized solar cells (DSSCs) fabricated with lowvolatility, commercially relevant electrolytes, with and without added lithium.Results are shown over an extended time range (300 fs−6.3 ns) and extendedwavelength range (800−1400 nm) for both N719 and C106 dyes. Kinetics weremeasured on both TiO2 and noninjecting ZrO2. Using the latter, we havedetermined the spectra and absorption coefficient of N719 across the wavelengthrange. We find an isosbestic point in the TA spectra on TiO2 near 900 nm for allcells, existing from <1 ps to >1 ns. We show how measurements near this isosbesticpoint can give a false impression of uniformly femtosecond injection dynamics inDSSCs. Comparison of dynamics measured at 1200 nm with mid-IR transient absorption measured at 5100 nm confirms amajority proportion of slow (>10 ps) electron injection in these commercially relevant cells. We also comment on a recentpublication which appears to directly contradict the results we present.
AU  - Juozapavicius,M
AU  - Kaucikas,M
AU  - Dimitrov,SD
AU  - Barnes,PRF
AU  - van,Thor JJ
AU  - O'Regan,BC
PY  - 2013///
TI  - Evidence for “Slow” Electron Injection in Commercially Relevant Dye-2 Sensitized Solar Cells by Vis−NIR and IR Pump−Probe Spectroscopy
T2  - J Phys Chem C
ER  - 

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