Charge transport in anodic TiO2 nanotubes studied by terahertz spectroscopy
ČlánekOtevřený přístuppeer-reviewedpostprintDatum publikování
2016-08-24
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Krbal, Miloš
Kuchařík, Jiří
Sopha, Hanna
Němec, Hynek
Macák, Jan M.
Vedoucí práce
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Vydavatel
John Wiley & Sons, Inc.
Abstrakt
We report on the photoelectrochemical and terahertz measurements, of the charge transport properties of 1 μm thick self-organized TiO2 nanotube layers, prepared by the anodization of titanium. We provide evidence regarding the complexity of electron transport, and dynamics in the nanotubes. Shortly after photoexcitation, charge mobilites in amorphous and crystalline nanotubes are similar, but still lower compared to the bulk anatase. The mobility subsequently decreases due to trapping-detrapping processes. The recombination rate in anatase nanotubes is much slower than in the amorphous ones, enabling the material to reach an internal photon to electron conversion efficiency exceeding 60%.
Rozsah stran
p. 651 - 655
ISSN
1862-6270
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Projekt
funder/funfing programme/projectID/jurisdiction/project name/project acronym
EC/H2020/638857/EU/Towards New Generation of Solid-State Photovoltaic Cell: Harvesting Nanotubular Titania and Hybrid Chromophores/CHROMTISOL
Zdrojový dokument
Physica Status Solidi. RRL. 2016, vol.10, č. 9
Vydavatelská verze
http://dx.doi.org/10.1002/pssr.201600179
Přístup k e-verzi
Attribution-NonCommercial-NoDerivs 3.0 Czech Republic
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Klíčová slova
TiO2 nanotubes, charge transport, charge carrier traps, THz spectroscopy
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Except where otherwised noted, this item's license is described as Attribution-NonCommercial-NoDerivs 3.0 Czech Republic