Mechanochemical synthesis of stable, quantum-confined CsPbBr3perovskite nanocrystals with blue-green emission and high PLQY
(2022) In JPhys Materials 5(2).- Abstract
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... (More)
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.
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- author
- Goyal, A. ; Andrioti, E. ; Tang, Y. LU ; Zhao, Q. ; Zheng, K. LU ; Newell, K. D. and Schall, P.
- organization
- publishing date
- 2022-04-01
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- halide perovskites, mechanochemistry, nanocrystals, optical spectroscopy, photoluminescence, quantum confinement, quantum yield
- in
- JPhys Materials
- volume
- 5
- issue
- 2
- article number
- 024005
- publisher
- IOP Publishing
- external identifiers
-
- scopus:85128492349
- ISSN
- 2515-7639
- DOI
- 10.1088/2515-7639/ac618f
- language
- English
- LU publication?
- yes
- id
- df823e3d-af06-4fac-93c7-d01b93edf517
- date added to LUP
- 2022-07-04 16:52:34
- date last changed
- 2023-11-17 03:26:35
@article{df823e3d-af06-4fac-93c7-d01b93edf517,
abstract = {{<p>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. </p>}},
author = {{Goyal, A. and Andrioti, E. and Tang, Y. and Zhao, Q. and Zheng, K. and Newell, K. D. and Schall, P.}},
issn = {{2515-7639}},
keywords = {{halide perovskites; mechanochemistry; nanocrystals; optical spectroscopy; photoluminescence; quantum confinement; quantum yield}},
language = {{eng}},
month = {{04}},
number = {{2}},
publisher = {{IOP Publishing}},
series = {{JPhys Materials}},
title = {{Mechanochemical synthesis of stable, quantum-confined CsPbBr<sub>3</sub>perovskite nanocrystals with blue-green emission and high PLQY}},
url = {{http://dx.doi.org/10.1088/2515-7639/ac618f}},
doi = {{10.1088/2515-7639/ac618f}},
volume = {{5}},
year = {{2022}},
}