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Mechanochemical syn...
Mechanochemical synthesis of stable, quantum-confined CsPbBr3perovskite nanocrystals with blue-green emission and high PLQY
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- Goyal, A. (författare)
- Van der Waals-Zeeman Institute
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- Andrioti, E. (författare)
- Van der Waals-Zeeman Institute
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- Tang, Y. (författare)
- Van der Waals-Zeeman Institute
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- Zhao, Q. (författare)
- Technical University of Denmark
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- Zheng, K. (författare)
- Lund University,Lunds universitet,NanoLund: Centre for Nanoscience,Annan verksamhet, LTH,Lunds Tekniska Högskola,Kemisk fysik,Enheten för fysikalisk och teoretisk kemi,Kemiska institutionen,Institutioner vid LTH,Other operations, LTH,Faculty of Engineering, LTH,Chemical Physics,Physical and theoretical chemistry,Department of Chemistry,Departments at LTH,Faculty of Engineering, LTH,Technical University of Denmark
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- Newell, K. D. (författare)
- Van der Waals-Zeeman Institute
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- Schall, P. (författare)
- Van der Waals-Zeeman Institute
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(creator_code:org_t)
- 2022-04-08
- 2022
- Engelska.
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Ingår i: JPhys Materials. - : IOP Publishing. - 2515-7639. ; 5:2
- Relaterad länk:
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http://dx.doi.org/10... (free)
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https://lup.lub.lu.s...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- Cesium lead halides are a family of bright, visible-light emitting materials with near-unity photoluminescence quantum yield (PLQY) in nanocrystals (NCs). The usual way to achieve visible light-emission tunability is by mixing halides, which often leads to phase separation and poor stability. While the NCs should also show size-dependent PL emission, reports on strong quantum confinement in these materials are scarce. Here, we report the synthesis of quantum-confined cesium lead bromide (CsPbBr3) NCs via a facile, environment-friendly, and scalable high-energy mechanochemical synthesis route. The PLQY measured is ∼85%, even after 90 days of synthesis, and the emission wavelength is shifted from green, 520 nm, to blue, 460 nm by quantum confinement in NCs of size 3-5 nm. Micro-PL optical spectroscopy and atomic force microscopy confirm the size tunability of PL on a single-dot scale. Our work demonstrates the potential of mechanochemical synthesis in the medium-scale production of bright luminescent quantum-confined NCs that could be extended to other materials as well.
Ämnesord
- NATURVETENSKAP -- Fysik -- Atom- och molekylfysik och optik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Atom and Molecular Physics and Optics (hsv//eng)
Nyckelord
- halide perovskites
- mechanochemistry
- nanocrystals
- optical spectroscopy
- photoluminescence
- quantum confinement
- quantum yield
Publikations- och innehållstyp
- art (ämneskategori)
- ref (ämneskategori)
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