Jump to main content
Jump to site search

Issue 6, 2020
Previous Article Next Article

Automated microfluidic screening of ligand interactions during the synthesis of cesium lead bromide nanocrystals

Author affiliations

Abstract

Varying the nature of the molecular surface ligands used to synthesize and stabilize lead halide perovskite nanocrystals provides a facile way of tuning and optimizing particle properties. However, the inherently complex reaction parameter space associated with perovskite nanocrystal synthesis complicates this, necessitating long-term and laborious experimentation to optimize conditions for a specific ligand set, and to compare nanoparticle properties across different ligand sets. In the current work, we present an automated microfluidic-based strategy for multidimensional parameter screening, seeking to maximize luminescence intensities and minimize emission bandwidths from quantum confined nanostructures, by monitoring variations in photoluminescence as a function of reaction temperature, base-to-acid ligand ratio, and ligand alkyl chain structure (linear versus branched). For a linear ligand pair (octylamine and octanoic acid), we find two reaction parameter sets that yield bright and narrow emission from nanosheets emitting at 460 nm (synthesized at 100 °C with a low base : acid ratio, FWHM = 25 nm) and nanowires emitting at 497 nm (synthesized at 140 °C with a high base : acid ratio, FWHM = 17 nm). Introducing branched ligands (2-ethylhexylamine and/or 2-ethylhexanoic acid) induces a red shift in emission and shows that bright and narrow emission can only be obtained from weakly quantum-confined nanostructures, within the reaction conditions studied. This work represents the first use of a rapid automated microfluidic system for the screening of ligand interactions during the synthesis lead halide perovskite nanocrystals.

Graphical abstract: Automated microfluidic screening of ligand interactions during the synthesis of cesium lead bromide nanocrystals

Back to tab navigation

Supplementary files

Article information


Submitted
23 Jan 2020
Accepted
21 Feb 2020
First published
02 Mar 2020

This article is Open Access

Mol. Syst. Des. Eng., 2020,5, 1118-1130
Article type
Paper

Automated microfluidic screening of ligand interactions during the synthesis of cesium lead bromide nanocrystals

S. Li, R. W. Baker, I. Lignos, Z. Yang, S. Stavrakis, P. D. Howes and A. J. deMello, Mol. Syst. Des. Eng., 2020, 5, 1118 DOI: 10.1039/D0ME00008F

This article is licensed under a Creative Commons Attribution-NonCommercial 3.0 Unported Licence. You can use material from this article in other publications, without requesting further permission from the RSC, provided that the correct acknowledgement is given and it is not used for commercial purposes.

To request permission to reproduce material from this article in a commercial publication, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party commercial publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.


Social activity

Search articles by author

Spotlight

Advertisements