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Phosphatidylcholine-mediated regulation of growth kinetics for colloidal synthesis of cesium tin halide nanocrystals

Authors :
Jie Shu
Hong-Tao Sun
Qi Liu
Zuoshan Wang
Naoto Shirahata
Omar F. Mohammed
Bin-Bin Zhang
Bo Song
Jia-Kai Chen
Lu-Ming Wang
Osman M. Bakr
Yang Zhou
Source :
Nanoscale. 13:16726-16733
Publication Year :
2021
Publisher :
Royal Society of Chemistry (RSC), 2021.

Abstract

Cesium tin halide (CsSnX3, where X is halogen) perovskite nanocrystals (NCs) are one of the most representative alternatives to their lead-based cousins. However, a fundamental understanding of how to regulate the growth kinetics of colloidal CsSnX3 NCs is still lacking and, specifically, the role of surfactants in affecting their growth kinetics remains incompletely understood. Here we report a general approach for colloidal synthesis of CsSnX3 perovskite NCs through a judicious combination of capping agents. We demonstrate that introducing a small amount of zwitterionic phosphatidylcholine in the reaction is of vital importance for regulating the growth kinetics of CsSnX3 NCs, which otherwise merely leads to the formation of large-sized powders. Based on a range of experimental characterization, we propose that the formation of intermediate complexes between zwitterionic phosphatidylcholine and the precursors and the steric hindrance effect of branched fatty acid side-chains of phosphatidylcholine can regulate the growth kinetics of CsSnX3, which enables us to obtain CsSnX3 NCs with emission quantum yields among the highest values ever reported. Our finding of using zwitterionic capping agents to regulate the growth kinetics may inspire more research on the synthesis of high-quality tin-based perovskite NCs that could speed up their practical applications in optoelectronic devices.

Details

ISSN :
20403372 and 20403364
Volume :
13
Database :
OpenAIRE
Journal :
Nanoscale
Accession number :
edsair.doi.dedup.....efacb4cbe8a5fb566cbb5e68d6d7b4e3