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

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Published on: October 1, 2019

Atomically flat semiconductor nanoplatelets for light-emitting applications.

Bing Bai¹, Chengxi Zhang², Yongjiang Dou²

¹Key Lab for Special Functional Materials, Ministry of Education, National and Local Joint Engineering Research Center for High-Efficiency Display and Lighting Technology, School of Materials Science and Engineering, and Collaborative Innovation Center of Nano Functional Materials and Applications, Henaon University, Kaifeng 475004, China.

Chemical Society Reviews

|December 19, 2022

Summary

This summary is machine-generated.

Atomically flat two-dimensional (2D) semiconductor nanoplatelets (NPLs) offer unique optical properties for advanced light-emitting applications. Challenges remain in heavy metal use and understanding gain mechanisms for broader NPL adoption.

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Area of Science:

Materials Science
Nanotechnology
Optoelectronics

Background:

Significant progress has been made in atomically flat two-dimensional (2D) semiconductor nanoplatelets (NPLs) over the past decade.
These NPLs exhibit quantum well-like electronic structures, leading to unique optical properties.

Purpose of the Study:

To review the synthesis, properties, and applications of atomically flat 2D semiconductor NPLs.
To discuss recent advancements in NPL structures and their optical characteristics.
To identify challenges and propose solutions for the widespread application of NPLs.

Main Methods:

Review of synthesis approaches and growth mechanisms for 2D semiconductor NPLs.
Analysis of optical properties, including emission line width, photoluminescence lifetime, and gain coefficient.
Examination of core/shell, core/crown, and core/crown@shell structures.

Main Results:

Atomically flat 2D NPLs possess unique optical properties suitable for high color purity light-emitting devices like LEDs and lasers.
Controlled synthesis and passivation strategies have led to improved NPL structures.
Key applications include LEDs, LCD backlights, and lasers.

Conclusions:

Despite advancements, challenges such as heavy metal content (e.g., Cd2+) and unclear gain mechanisms hinder widespread NPL application.
Further research is needed to address these obstacles and unlock the full potential of 2D semiconductor NPLs.