| Naslov: | Time-of-flight photoconductivity investigation of high charge carrier mobility in Ti3C2Tx MXenes thin-film |
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| Avtorji: | ID Urbančič, Jurij, Univerza v Novi Gorici (Avtor)
ID Tomsič, Erika, Univerza v Novi Gorici (Avtor)
ID Chhikara, Manisha, Univerza v Novi Gorici (Avtor)
ID Pastukhova, Nadiia, Univerza v Novi Gorici (Avtor)
ID Tkachuk, Vadym, Univerza v Novi Gorici (Avtor)
ID Mavrič, Andraž, Univerza v Novi Gorici (Avtor)
ID Bratina, Gvido, Univerza v Novi Gorici (Avtor)
ID Pavlica, Egon, Univerza v Novi Gorici (Avtor), et al. |
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| Datoteke: | Gradivo nima datotek, ki so prostodostopne za javnost. Gradivo je morda fizično dosegljivo v knjižnici fakultete, zalogo lahko preverite v COBISS-u.  |
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| Jezik: | Slovenski jezik |
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| Vrsta gradiva: | Delo ni kategorizirano |
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| Tipologija: | 1.01 - Izvirni znanstveni članek |
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| Organizacija: | UNG - Univerza v Novi Gorici
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| Opis: | Charge transport through a randomly oriented multilayered network of two-dimensional (2D) Ti3C2Tx (where Tx is the surface termination and corresponds to O, OH and F) was studied using time-of-flight photoconductivity (TOFP) method, which is highly sensitive to the distribution of charge carrier velocities. We prepared samples comprising Ti3C2Tx with thickness of 12 nm or 6-monolayers. MXene flakes of size up to 16 μm were randomly deposited on the surface by spin-coating from water solution. Using TOFP, we have measured electron mobility that reached values up to 279 cm2/Vs and increase with electric-field in a Poole-Frenkel manner. These values are approximately 50 times higher than previously reported field-effect mobility. Interestingly, our zero-electric-field extrapolate approaches electron mobility measured using terahertz absorption method, which represents intra-flake transport. Our data suggest that macroscopic charge transport is governed by two distinct mechanisms. The high mobility values are characteristic for the intra-flake charge transport via the manifold of delocalized states. On the other hand, the observed Poole-Frenkel dependence of charge carrier mobility on the electric field is typical for the disordered materials and suggest the existence of an important contribution of inter-flake hopping to the overall charge transport. |
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| Ključne besede: | Charge transport in multilayered network of flakes, Time-of-flight photoconductivity, MXene exfoliation, High-mobility solution-cast thin-film, Semiconducting mxene |
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| Verzija članka: | Postprint, avtorjeva končna recenzirana različica članka, sprejeta v objavo |
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| Leto izida: | 2023 |
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| Št. strani: | 6 |
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| Številčenje: | Volume 135, 2023 |
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| PID: | 20.500.12556/RUNG-8102 |
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| COBISS.SI-ID: | 147310851 |
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| NUK URN: | URN:SI:UNG:REP:AVLCDUMO |
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| Datum objave v RUNG: | 31.03.2023 |
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| Število ogledov: | 447 |
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| Število prenosov: | 0 |
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| Metapodatki: |     |
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