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Purely ionically bo...
Purely ionically bonded cation paving the way to ultralow thermal conductivity and large thermoelectric figure of merit in Ruddlesden-Popper perovskite Cs2SnI2Br2
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- Majumdar, Arnab (author)
- Terramera Inc, Chem & Bioinformat Dept, Vancouver, BC V5Y 1K3, Canada.
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- Chowdhury, Suman (author)
- Univ Delhi, Dept Phys & Astrophys, Delhi 110007, India.
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- Ahuja, Rajeev, 1965- (author)
- Uppsala universitet,Materialteori,Teoretisk fysik,Indian Inst Technol Ropar, Dept Phys, Rupnagar 140001, Punjab, India.
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Terramera Inc, Chem & Bioinformat Dept, Vancouver, BC V5Y 1K3, Canada Univ Delhi, Dept Phys & Astrophys, Delhi 110007, India. (creator_code:org_t)
- Institute of Physics (IOP), 2024
- 2024
- English.
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In: Journal of Physics. - : Institute of Physics (IOP). - 0953-8984 .- 1361-648X. ; 36:34
- Related links:
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http://epc.ub.uu.se/...
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Subject headings
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- Lower dimensional materials have gained quite a bit of popularity in the last few decades. Perovskite materials have been studied extensively for their photovoltaic properties. But for large scale application of photovoltaic materials, the thermal properties need to be studied. In this work, using first principles calculations, we have studied the thermal conductivity and thermoelectric performance of quasi two-dimensional (2D) Ruddlesden-Popper phase of perovskite, Cs2SnI2Br2. The Cs atoms are found to be ionically bonded to the halogens leading to low elastic constants and hence give rise to weak bonding. The large anharmonicity in this material causes the lattice thermal conductivity to be ultralow having a value of 0.30 Wm(-1)K-1 at 300 K and therefore the thermoelectric figure of merit has been found to be high with a maximum value of 2.08 at 600 K. This lead-free 2D perovskite can be the precursor to a wide variety of similar materials with ultralow thermal conductivity.
Subject headings
- NATURVETENSKAP -- Kemi -- Materialkemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Materials Chemistry (hsv//eng)
- TEKNIK OCH TEKNOLOGIER -- Materialteknik -- Annan materialteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Materials Engineering -- Other Materials Engineering (hsv//eng)
- NATURVETENSKAP -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Condensed Matter Physics (hsv//eng)
Keyword
- Ruddlesden-Popper
- perovskite
- thermoelectric
- DFT
- ultralow thermal conductivity
- anharmonic scattering
Publication and Content Type
- ref (subject category)
- art (subject category)
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