Ligand Mediated Transformation of Cesium Lead Bromide Perovskite Nanocrystals to Lead Depleted Cs4PbBr6 Nanocrystals
2017/03/30 by Zeke Liu, Yehonadav Bekenstein, Xingchen Ye +9 · 29 citations
Engineering · Materials Science · Physics and Astronomy · #Perovskite Materials and Applications #Quantum Dots Synthesis And Properties #Optical properties and cooling technologies in crystalline materials
paper · doi:10.1021/jacs.7b01409
Abstract
Lead halide perovskite nanocrystals (NCs) have emerged as attractive nanomaterials owing to their excellent optical and optoelectronic properties. Their intrinsic instability and soft nature enable a post-synthetic controlled chemical transformation. We studied a ligand mediated transformation of presynthesized CsPbBr 3 NCs to a new type of lead–halide depleted perovskite derivative nanocrystal, namely Cs 4 PbBr 6 . The transformation is initiated by amine addition, and the use of alkyl-thiol ligands greatly improves the size uniformity and chemical stability of the derived NCs. The thermodynamically driven transformation is governed by a two-step dissolution–recrystallization mechanism, which is monitored optically. Our results not only shed light on a decomposition pathway of CsPbBr 3 NCs but also present a method to synthesize uniform colloidal Cs 4 PbBr 6 NCs, which may actually be a common product of perovskite NCs degradation.
Citations
Cited by
- Passivation Mechanism in Highly Luminescent Nanocomposite‐Based CH3NH3PbBr3 Perovskite Nanocrystals
- Tailoring Charge Donor–Acceptor Interaction in CsPbBr3 Perovskite Nanocrystals through Ligand Exchange
- Exploring optimal in situ fabrication conditions to realize core–shell CsPbBr 3 QDs with high PLQYs and structural stability by dual-defect passivation
- State of the Art and Prospects for Halide Perovskite Nanocrystals
- Changing the Dimensionality of Cesium Lead Bromide Nanocrystals by Reversible Postsynthesis Transformations with Amines. [europepmc]
- Writing on Nanocrystals: Patterning Colloidal Inorganic Nanocrystal Films through Irradiation-Induced Chemical Transformations of Surface Ligands. [europepmc]
- Postsynthesis Transformation of Insulating Cs 4 PbBr 6 Nanocrystals into Bright Perovskite CsPbBr 3 through Physical and Chemical Extraction of CsBr. [europepmc]
- Role of Acid-Base Equilibria in the Size, Shape, and Phase Control of Cesium Lead Bromide Nanocrystals. [europepmc]
- Colloidal CsPbX 3 (X = Cl, Br, I) Nanocrystals 2.0: Zwitterionic Capping Ligands for Improved Durability and Stability. [europepmc]
- Zero-Dimensional Cesium Lead Halides: History, Properties, and Challenges. [europepmc]
- All-Inorganic Metal Halide Perovskite Nanocrystals: Opportunities and Challenges. [europepmc]
- The Phosphine Oxide Route toward Lead Halide Perovskite Nanocrystals. [europepmc]
- Pressure-induced emission of cesium lead halide perovskite nanocrystals. [europepmc]
- Shape-Pure, Nearly Monodispersed CsPbBr 3 Nanocubes Prepared Using Secondary Aliphatic Amines. [europepmc]
- Rationalizing and Controlling the Surface Structure and Electronic Passivation of Cesium Lead Halide Nanocrystals. [europepmc]
- Metal Halide Perovskite Nanocrystals: Synthesis, Post-Synthesis Modifications, and Their Optical Properties. [europepmc]
- Ultrasonication-assisted synthesis of CsPbBr 3 and Cs 4 PbBr 6 perovskite nanocrystals and their reversible transformation. [europepmc]
- Understanding the Ligand Effects on Photophysical, Optical, and Electroluminescent Characteristics of Hybrid Lead Halide Perovskite Nanocrystal Solids. [europepmc]
- Temperature-Driven Transformation of CsPbBr 3 Nanoplatelets into Mosaic Nanotiles in Solution through Self-Assembly. [europepmc]
- Transforming colloidal Cs 4 PbBr 6 nanocrystals with poly(maleic anhydride- alt -1-octadecene) into stable CsPbBr 3 perovskite emitters through intermediate heterostructures. [europepmc]
- Green-Emitting Powders of Zero-Dimensional Cs 4 PbBr 6 : Delineating the Intricacies of the Synthesis and the Origin of Photoluminescence. [europepmc]
- Effect of Surface Ligands in Perovskite Nanocrystals: Extending in and Reaching out. [europepmc]
- State of the Art and Prospects for Halide Perovskite Nanocrystals. [europepmc]
- On the Mechanism of Alkylammonium Ligands Binding to the Surface of CsPbBr 3 Nanocrystals. [europepmc]
- The Reactivity of CsPbBr 3 Nanocrystals toward Acid/Base Ligands. [europepmc]
- Ultra-narrow room-temperature emission from single CsPbBr 3 perovskite quantum dots. [europepmc]
- Synthesis of stable and phase-adjustable CsPbBr 3 @Cs 4 PbBr 6 nanocrystals via novel anion-cation reactions. [europepmc]
- Inorganic Halide Perovskite Quantum Dots: A Versatile Nanomaterial Platform for Electronic Applications. [europepmc]
- Surface Chemistry of Lead Halide Perovskite Colloidal Nanocrystals. [europepmc]
Related