Journal article
Ultrafast Carrier and Lattice Cooling in Ti2CT x MXene Thin Films
Nano letters, v 24(51), pp 16333-16341
25 Dec 2024
PMID: 39575464
Abstract
Metallic MXenes are promising two-dimensional materials for energy storage, (opto)electronics, and photonics due to their high electrical conductivity and strong light-matter interaction. Energy dissipation in MXenes is fundamental for photovoltaic and photothermal applications. Here we apply ultrafast laser spectroscopy across a broad time range (femto- to microseconds) to study the cooling dynamics of electrons and lattice in emerging Ti2CT x thin films compared to widely studied Ti3C2T x thin films. The carrier cooling time in Ti2CT x is persistently similar to 2.6 ps without a hot-phonon bottleneck. After hot carrier cooling is completed, the transient absorption spectra of Ti2CT x MXene can be described well by the thermochromic effect. Heat dissipation in MXene thin films occurs over hundreds of nanoseconds with thermal diffusivities similar to 0.06 mm2 s-1 for Ti2CT x and similar to 0.02 mm2 s-1 for Ti3C2T x , likely due to inefficient interflake heat transfer. Our results unravel the energy dissipation dynamics in Ti2CT x films, showcasing potential applications in energy conversion.
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Details
- Title
- Ultrafast Carrier and Lattice Cooling in Ti2CT x MXene Thin Films
- Creators
- Tong Wang - Imperial College LondonChengning Yao - Imperial College LondonRuoyu Gao - Imperial Coll London, Dept Chem, London W12 0BZ, EnglandMartin Holicky - Imperial College LondonBeier Hu - Imperial College LondonSihui Liu - Imperial College LondonShuwei Wu - Imperial College LondonHyunho Kim - Imperial College LondonHaoqing Ning - Imperial College LondonFelice Torrisi - Imperial College LondonArtem A. Bakulin - Imperial College London
- Publication Details
- Nano letters, v 24(51), pp 16333-16341
- Publisher
- Amer Chemical Soc
- Number of pages
- 9
- Grant note
- EP/T005106/1; EP/X026876/1 / European Union (NextGeneration EU); European Union (EU); Marie Curie Actions China Scholarship Council ECS00000022 / H2020 European Research Council; Horizon 2020; European Research Council (ERC) European Research Council (ERC) under the European Union; European Research Council (ERC) 639750/VIBCONTROL; EP/X030822/1 / EPSRC; UK Research & Innovation (UKRI); Engineering & Physical Sciences Research Council (EPSRC) Department of Chemistry at Imperial College London
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Materials Science and Engineering
- Web of Science ID
- WOS:001362140000001
- Scopus ID
- 2-s2.0-85210132213
- Other Identifier
- 991022059812104721
InCites Highlights
Data related to this publication, from InCites Benchmarking & Analytics tool:
- Collaboration types
- Domestic collaboration
- International collaboration
- Web of Science research areas
- Chemistry, Multidisciplinary
- Chemistry, Physical
- Materials Science, Multidisciplinary
- Nanoscience & Nanotechnology
- Physics, Applied
- Physics, Condensed Matter