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Synthesis of Zwitterionic CsPbBr 3 Nanocrystals with Controlled Anisotropy using Surface‐Selective Ligand Pairs

Journal Article · · Advanced Materials
 [1];  [1];  [1];  [1];  [1];  [2];  [1];  [1];  [1];  [1]
  1. Department of Chemistry Massachusetts Institute of Technology Cambridge MA 02139 USA
  2. National Synchrotron Light Source II Brookhaven National Laboratory Upton NY 11973 USA
Abstract

Mechanistic studies of the morphology of lead halide perovskite nanocrystals (LHP‐NCs) are hampered by a lack of generalizable suitable synthetic strategies and ligand systems. Here, the synthesis of zwitterionic CsPbBr 3 NCs is presented with controlled anisotropy using a proposed “surface‐selective ligand pairs” strategy. Such a strategy provides a platform to systematically study the binding affinity of capping ligand pairs and the resulting LHP morphologies. By using zwitterionic ligands (ZwL) with varying structures, majority ZwL‐capped LHP NCs with controlled morphology are obtained, including anisotropic nanoplatelets and nanorods, for the first time. Combining experiments with density functional theory calculations, factors that govern the ligand binding on the different surface facets of LHP‐NCs are revealed, including the steric bulkiness of the ligand, the number of binding sites, and the charge distance between binding moieties. This study provides guidance for the further exploration of anisotropic LHP‐NCs.

Research Organization:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Organization:
German Research Foundation; National Science Foundation (NSF); National Science and Engineering Research Council of Canada; USDOE; USDOE Office of Energy Efficiency and Renewable Energy (EERE); USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
AC02-06CH11357; EE0009512; SC0012704; SC0021650
OSTI ID:
1992982
Alternate ID(s):
OSTI ID: 2005149
OSTI ID: 1995919
Report Number(s):
BNL-224835-2023-JAAM; 2304069
Journal Information:
Advanced Materials, Journal Name: Advanced Materials Journal Issue: 39 Vol. 35; ISSN 0935-9648
Publisher:
Wiley Blackwell (John Wiley & Sons)Copyright Statement
Country of Publication:
Germany
Language:
English

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