Continuous synthesis of metal halide perovskite nanoparticles with sharp and stable emission
type: CreativeWork
description: Metal halide perovskite nanoparticles present unique and attractive optical and electronic properties, leading to promising application in optoelectronic devices such as light-emitting diodes and solar cells. The optical properties of metal halide perovskite nanoparticles are tuneable by size, therefore, synthesizing metal halide perovskite nanoparticles with size control, especially the quasi-2D nanoplatelets, are of great interest. However, the lack of deep understanding of the synthesis reaction hinders further development of the quasi-2D metal halide perovskite nanoplatelets. The lack of size control and thickness tuning impedes the colour-pure and tuneable emission obtainable from monodisperse metal halide perovskite nanoplatelets. In addition, the stability of these materials is relatively low, hence requiring further development. This thesis focuses on the controllable synthesis of caesium lead halide (CsPbX3) nanoplatelets (NPls) with size tunability and phase purity using continuous flow reactors and the stability improvement of CsPbX3 nanocrystals (NCs). The controllable synthesis is achieved by reactor engineering, and the importance of mass transport in the synthetic processes is revealed. The stability improvement is attained by encapsulation approach with a series of materials. First, the importance of transport phenomena on the synthesis of metal halide perovskite nanoplatelets is illustrated with CsPbBr3 NPl synthesis reaction in batch and flow reactors. The need for fast and homogeneous mixing is demonstrated to achieve monodispersed crystals, in this case CsPbBr3 NPls with sharp blue emission. The modularity of the synthesis method, combining fluid dynamic simulations in a collaboration, bespoke 3D flow reactors, and on-line measurements (UV-vis absorbance and photoluminescence) reveals fundamental understanding about the growth of these perovskite nanomaterials, which in turn leads to superlative size reducibility (2.2 ± 0.3 nm) and properties (sh…
abstract: Metal halide perovskite nanoparticles present unique and attractive optical and electronic properties, leading to promising application in optoelectronic devices such as light-emitting diodes and solar cells. The optical properties of metal halide perovskite nanoparticles are tuneable by size, therefore, synthesizing metal halide perovskite nanoparticles with size control, especially the quasi-2D nanoplatelets, are of great interest. However, the lack of deep understanding of the synthesis reaction hinders further development of the quasi-2D metal halide perovskite nanoplatelets. The lack of size control and thickness tuning impedes the colour-pure and tuneable emission obtainable from monodisperse metal halide perovskite nanoplatelets. In addition, the stability of these materials is relatively low, hence requiring further development. This thesis focuses on the controllable synthesis of caesium lead halide (CsPbX3) nanoplatelets (NPls) with size tunability and phase purity using continuous flow reactors and the stability improvement of CsPbX3 nanocrystals (NCs). The controllable synthesis is achieved by reactor engineering, and the importance of mass transport in the synthetic processes is revealed. The stability improvement is attained by encapsulation approach with a series of materials. First, the importance of transport phenomena on the synthesis of metal halide perovskite nanoplatelets is illustrated with CsPbBr3 NPl synthesis reaction in batch and flow reactors. The need for fast and homogeneous mixing is demonstrated to achieve monodispersed crystals, in this case CsPbBr3 NPls with sharp blue emission. The modularity of the synthesis method, combining fluid dynamic simulations in a collaboration, bespoke 3D flow reactors, and on-line measurements (UV-vis absorbance and photoluminescence) reveals fundamental understanding about the growth of these perovskite nanomaterials, which in turn leads to superlative size reducibility (2.2 ± 0.3 nm) and properties (sh…
author: Zhang, Kaiwen
language: eng
keywords: continuous synthesis, metal halide perovskite
license: https://apollo8-f-pro.lib.cam.ac.uk/bitstreams/312bb39b-2f16-42f7-a09c-984f970f6527/download
license: https://www.rioxx.net/licenses/all-rights-reserved/
date published: 2023-01-17
date modified: 2026-07-22T22:24:30Z
provider: Cambridge University
publisher: Networked Digital Library of Theses and Dissertations
type: WebPage
source organization: University of Cambridge

PropertyValue
property ID: DOI
value: 10.17863/CAM.96906