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Updated: Nov 21, 2025

Facile Synthesis of Colloidal Lead Halide Perovskite Nanoplatelets via Ligand-Assisted Reprecipitation

Facile Synthesis of Colloidal Lead Halide Perovskite Nanoplatelets via Ligand-Assisted Reprecipitation

Published on: October 1, 2019

NIR-excitable heterostructured upconversion perovskite nanodots with improved stability.

Longfei Ruan¹, Yong Zhang^2,3

¹Department of Biomedical Engineering, Faculty of Engineering, National University of Singapore, Singapore, 117583, Singapore.

Nature Communications

|January 12, 2021

Summary

Researchers developed novel hybrid nanocrystals combining perovskite quantum dots (QDs) and upconversion nanoparticles (UCNPs). These stable, near-infrared excitable heterostructures overcome previous material incompatibility challenges for advanced bioimaging applications.

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Area of Science:

Materials Science
Nanotechnology
Biomedical Engineering

Background:

Heterostructured nanocrystals offer combined material advantages.
Perovskite quantum dots (QDs) show promise for optical applications but lack stability and deep tissue penetration.
Upconversion nanoparticles (UCNPs) are crucial for near-infrared (NIR) excitation, but direct epitaxial growth with perovskite QDs is challenging.

Purpose of the Study:

To synthesize stable, NIR-excitable, and emission-tunable hybrid nanocrystals.
To overcome the incompatibility between hexagonal UCNPs and cubic perovskite QDs.
To develop heterostructured nanocrystals for improved biological applications.

Main Methods:

One-pot synthesis of hybrid nanocrystals.
Utilizing cubic phase UCNPs as an intermediate transition phase.
Formation of watermelon-like heterostructures.

Main Results:

Successfully synthesized perovskite-UCNP hybrid nanocrystals.
Achieved NIR excitation and significantly improved nanocrystal stability.
Demonstrated a novel method for combining incompatible crystal phases.

Conclusions:

The developed heterostructured nanocrystals offer enhanced stability and NIR excitation.
This work presents a viable strategy for creating advanced hybrid nanomaterials.
The findings pave the way for improved bioimaging and other applications requiring stable, NIR-excitable nanoparticles.