Synthesis and Stabilization of Colloidal Perovskite Nanocrystals by Multidentate Polymer Micelles

Abstract

Lead halide perovskites have emerged as low-cost, high-performance optical and optoelectronic materials, however, their material stability has been a limiting factor for broad applications. Here, we demonstrate stable core-shell colloidal perovskite nanocrystals using a novel, facile and low-cost copolymer templated synthesis approach. The block copolymer serves as a confined nanoreactor during perovskite crystallization and passivates the perovskite surface by forming a multidentate capping shell, thus significantly improving its photostability in polar solvents. Meanwhile, the polymer nanoshell provides an additional layer for further surface modifications, paving the way to functional nanodevices that can be self-assembled or lithographically defined.

Spray‐Assisted Coil–Globule Transition for Scalable Preparation of Water‐Resistant CsPbBr3@PMMA Perovskite Nanospheres with Application in Live Cell Imaging

“…The fluorescence intensity of CPB PQD colloid declined nearly 100% within 1 h in case of either water or ethanol, as shown in Figure a. Meanwhile, the CPB@PMMA nanospheres retained stable fluorescence intensities over the 80 days of this study in both water and ethanol, with the intensity loss of only 19% and 8%, respectively, comparable to literatures …”

Perovskite Quantum Dots and Their Application in Light‐Emitting Diodes

“…Copyright 2015, American Chemical Society). b) Synthesis of CsPbBr 3 PQDs by amphiphilic block copolymer micelles as nanoreactor) (Reproduced with permission . Copyright 2017, American Chemical Society).…”

Enhanced Thermal Stability of Halide Perovskite CsPbX3 Nanocrystals by a Facile TPU Encapsulation

“…Therefore, various encapsulation materials have been studied to alleviate the effects of thermal degradation in recent years. Among them, the most popular materials are the following five types: oxides, inorganic salts, organic polymers, inorganic polymers, and metal organic frameworks (MOFs) . For example, after completing the encapsulation of MAPbBr 3 quantum dots (QDs) with SiO 2 , the thermal degradation effect of the material in the air was significantly reduced .…”