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Conductivity studie...
Conductivity studies of nanostructured TiO2 films permeated with electrolyte
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- Agrell, H. G. (författare)
- Uppsala universitet,Fysikalisk-kemiska institutionen
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- Boschloo, Gerrit (författare)
- Uppsala universitet,Fysikalisk-kemiska institutionen
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- Hagfeldt, Anders (författare)
- Uppsala universitet,Fysikalisk-kemiska institutionen
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(creator_code:org_t)
- 2004-07-27
- 2004
- Engelska.
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Ingår i: Journal of Physical Chemistry B. - : American Chemical Society (ACS). - 1520-6106 .- 1520-5207. ; 108:33, s. 12388-12396
- Relaterad länk:
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https://urn.kb.se/re...
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visa fler...
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https://doi.org/10.1...
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https://urn.kb.se/re...
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Abstract
Ämnesord
Stäng
- Charge transport in nanostructured TiO2 films permeated with an electrolyte was studied, using temperature-dependent conductivity and electron accumulation measurements. Two regions for charge transport were distinguished from the relationship between conductivity and electron concentration. In the first region (similar to1-20 electrons per TiO2 particle), the effective electron mobility is dependent on the electron concentration and values between 7 x 10(-4) and 78 x 10(-4) cm(2) V-1 s(-1) were determined. The activation energy of the mobility was similar to0.3 eV. The charge transport can be described with a trapping/detrapping model that involves localized band-gap states. In the second region (> 20 electrons per TiO2 particle), the effective electron mobility is independent of electron concentration and values of similar to150 x 10(-4) cm(2) V-1 s(-1) are calculated. The activation energy of mobility is in the range of 0-0.15 eV, depending on the electrolyte. Transport of electrons in the conduction band seems to be the most applicable model.
Nyckelord
- nanocrystalline photovoltaic cells
- solar-cells
- charge-transfer
- back-reaction
- transport
- conversion
- nanoparticulate
- efficiency
- impedance
- kinetics
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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