One-Dimensional Highly-Confined CsPbBr<sub>3</sub> Nanorods with Enhanced Stability: Synthesis and Spectroscopy.
basic_science · Level V
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- Record sourced from PubMed, PMID 36223648.
- Also identified by DOI 10.1021/acs.nanolett.2c03458.
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Abstract
One-dimensional (1D) colloidal lead halide perovskites (LHPs) have potential as quantum emitters. Their study, however, has been hampered by their previous instability, leaving a gap in our understanding of structure-property relationships in colloidal LHPs with anisotropic shapes. Here, we synthesize stable, highly-confined 1D CsPbBr<sub>3</sub> nanorods (NRs) and demonstrate their structural details and photoluminescence (PL) properties at both the ensemble and single particle levels. Using amino-terminated copolymers, we are able to stabilize and characterize 1D CsPbBr<sub>3</sub> NRs utilizing transmission electron microscopy (TEM) and small angle scattering (SAS). Scanning transmission electron microscopy reveals that these NRs possess structural defects, including twists and inhomogeneity. Solution-phase photon correlation spectroscopy shows low biexciton-to-exciton quantum yield ratios (QY<sub>BX</sub>/QY<sub>X</sub>) and broad spectral line widths dominated by homogeneous broadening.