About: Influence of the Electron-Cation Interaction on Electron Mobility in Dye-Sensitized ZnO and TiO2 Nanocrystals: A Study Using Ultrafast Terahertz Spectroscopy

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About: Influence of the Electron-Cation Interaction on Electron Mobility in Dye-Sensitized ZnO and TiO2 Nanocrystals: A Study Using Ultrafast Terahertz Spectroscopy Goto Sponge NotDistinct Permalink

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	Charge transport and recombination in nanostructured semiconductors are poorly understood key processes in dye-sensitized solar cells. We have employed time-resolved spectroscopies in the terahertz and visible spectral regions supplemented with Monte Carlo simulations to obtain unique information on these processes. Our results show that charge transport in the active solar cell material can be very different from that in nonsensitized semiconductors, due to strong electrostatic interaction between injected electrons and dye cations at the surface of the semiconductor nanoparticle. For ZnO, this leads to formation of an electron-cation complex which causes fast charge recombination and dramatically decreases the electron mobility even after the dissociation of the complex. Sensitized TiO2 does not suffer from this problem due to its high permittivity efficiently screening the charges. Charge transport and recombination in nanostructured semiconductors are poorly understood key processes in dye-sensitized solar cells. We have employed time-resolved spectroscopies in the terahertz and visible spectral regions supplemented with Monte Carlo simulations to obtain unique information on these processes. Our results show that charge transport in the active solar cell material can be very different from that in nonsensitized semiconductors, due to strong electrostatic interaction between injected electrons and dye cations at the surface of the semiconductor nanoparticle. For ZnO, this leads to formation of an electron-cation complex which causes fast charge recombination and dramatically decreases the electron mobility even after the dissociation of the complex. Sensitized TiO2 does not suffer from this problem due to its high permittivity efficiently screening the charges. (en)
Title	Influence of the Electron-Cation Interaction on Electron Mobility in Dye-Sensitized ZnO and TiO2 Nanocrystals: A Study Using Ultrafast Terahertz Spectroscopy Influence of the Electron-Cation Interaction on Electron Mobility in Dye-Sensitized ZnO and TiO2 Nanocrystals: A Study Using Ultrafast Terahertz Spectroscopy (en)
skos:prefLabel	Influence of the Electron-Cation Interaction on Electron Mobility in Dye-Sensitized ZnO and TiO2 Nanocrystals: A Study Using Ultrafast Terahertz Spectroscopy Influence of the Electron-Cation Interaction on Electron Mobility in Dye-Sensitized ZnO and TiO2 Nanocrystals: A Study Using Ultrafast Terahertz Spectroscopy (en)
skos:notation	RIV/60076658:12640/10:00012165!RIV11-MSM-12640___
http://linked.open...avai/riv/aktivita	I P S Z
http://linked.open...avai/riv/aktivity	I, P(GP202/09/P099), P(IAA100100902), P(LC512), S, Z(AV0Z10100520)
http://linked.open...iv/cisloPeriodika	19
http://linked.open...vai/riv/dodaniDat	2011
http://linked.open...aciTvurceVysledku	Polívka, Tomáš
http://linked.open.../riv/druhVysledku	J - Článek v odborném periodiku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Jihočeská univerzita v Českých Budějovicích / Ústav fyzikální biologie
http://linked.open...dnocenehoVysledku	263824
http://linked.open...ai/riv/idVysledku	RIV/60076658:12640/10:00012165
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	SOLAR-CELLS; CHARGE RECOMBINATION; THIN-FILMS; TRANSPORT; INJECTION; SEMICONDUCTORS; CONVERSION; MECHANISM; KINETICS; STATES (en)
http://linked.open.../riv/klicoveSlovo	MECHANISM SEMICONDUCTORS STATES TRANSPORT CHARGE RECOMBINATION INJECTION SOLAR-CELLS THIN-FILMS KINETICS CONVERSION
http://linked.open...odStatuVydavatele	US - Spojené státy americké
http://linked.open...ontrolniKodProRIV	[65D257E779D8]
http://linked.open...i/riv/nazevZdroje	Physical Review Letters
http://linked.open...in/vavai/riv/obor	BO
http://linked.open...ichTvurcuVysledku	1 (xsd:int)
http://linked.open...cetTvurcuVysledku	8 (xsd:int)
http://linked.open...vavai/riv/projekt	Center for biomolecules and complex molecular systems Ultrafast electron dynamics in disordered organic and inorganic semiconductors studied by time-resolved terahertz spectroscopy Study of ultrafast photoconductivity and charge transport in thin semiconducting layers using terahertz spectroscopy
http://linked.open...UplatneniVysledku	2010
http://linked.open...v/svazekPeriodika	104
http://linked.open...iv/tvurceVysledku	Polívka, Tomáš Galoppini, E. Yartsev, A. Nemec, H. Kuzel, P. Rochford, J. Sundstrom, V. Taratula, O.
http://linked.open...ain/vavai/riv/wos	000277699600050
http://linked.open...n/vavai/riv/zamer	Specific effects in condensed systems with reduced dimension and broken symmetry
issn	0031-9007
number of pages	4 (xsd:int)
http://localhost/t...ganizacniJednotka	12640

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