Colloidal Synthesis of Quantum Confined Single Crystal CsPbBr3 Nanosheets with Lateral Size Control up to the Micrometer Range

We report the nontemplated colloidal synthesis of single crystal CsPbBr3 perovskite nanosheets with lateral sizes up to a few micrometers and with thickness of just a few unit cells (i.e., below 5 nm), hence in the strong quantum confinement regime, by introducing short ligands (octanoic acid and octylamine) in the synthesis together with longer ones (oleic acid and oleylamine). The lateral size is tunable by varying the ratio of shorter ligands over longer ligands, while the thickness is mainly unaffected by this parameter and stays practically constant at 3 nm in all the syntheses conducted at short-to-long ligands volumetric ratio below 0.67. Beyond this ratio, control over the thickness is lost and a multimodal thickness distribution is observed.

[1]  Hua Zhang.  Ultrathin Two-Dimensional Nanomaterials. , 2015, ACS nano.

[2]  Lin-wang Wang,et al.  Materials and Methods Supplementary Text Fig. S1 Reference (35) Database S1 Atomically Thin Two-dimensional Organic-inorganic Hybrid Perovskites , 2022 .

[3]  Long Men,et al.  Shape evolution and single particle luminescence of organometal halide perovskite nanocrystals. , 2015, ACS nano.

[4]  Christopher H. Hendon,et al.  Nanocrystals of Cesium Lead Halide Perovskites (CsPbX3, X = Cl, Br, and I): Novel Optoelectronic Materials Showing Bright Emission with Wide Color Gamut , 2015, Nano letters.

[5]  He Huang,et al.  Control of Emission Color of High Quantum Yield CH3NH3PbBr3 Perovskite Quantum Dots by Precipitation Temperature , 2015, Advanced science.

[6]  Benoit Dubertret,et al.  Two-dimensional colloidal metal chalcogenides semiconductors: synthesis, spectroscopy, and applications. , 2015, Accounts of chemical research.

[7]  Olga Malinkiewicz,et al.  Nontemplate synthesis of CH3NH3PbBr3 perovskite nanoparticles. , 2014, Journal of the American Chemical Society.

[8]  Qibing Pei,et al.  Emulsion Synthesis of Size-Tunable CH3NH3PbBr3 Quantum Dots: An Alternative Route toward Efficient Light-Emitting Diodes. , 2015, ACS applied materials & interfaces.

[9]  M. Kovalenko,et al.  Fast Anion-Exchange in Highly Luminescent Nanocrystals of Cesium Lead Halide Perovskites (CsPbX3, X = Cl, Br, I) , 2015, Nano letters.

[10]  Richard L. Brutchey,et al.  On the crystal structure of colloidally prepared CsPbBr3 quantum dots. , 2016, Chemical communications.

[11]  M. Kovalenko,et al.  Polar-solvent-free colloidal synthesis of highly luminescent alkylammonium lead halide perovskite nanocrystals. , 2016, Nanoscale.

[12]  Liberato Manna,et al.  Tuning the Optical Properties of Cesium Lead Halide Perovskite Nanocrystals by Anion Exchange Reactions , 2015, Journal of the American Chemical Society.

[13]  SUPARNA DUTTASINHA,et al.  Graphene: Status and Prospects , 2009, Science.

[14]  John W. Connell,et al.  Soluble, Exfoliated Hexagonal Boron Nitride Nanosheets , 2010 .

[15]  H. Demir,et al.  Inorganic Halide Perovskites for Efficient Light-Emitting Diodes. , 2015, The journal of physical chemistry letters.

[16]  Hua Zhang,et al.  Wet-chemical synthesis and applications of non-layer structured two-dimensional nanomaterials , 2015, Nature Communications.

[17]  Yi Yu,et al.  Solution-Phase Synthesis of Cesium Lead Halide Perovskite Nanowires. , 2015, Journal of the American Chemical Society.

[18]  Giovanni Bertoni,et al.  Solution Synthesis Approach to Colloidal Cesium Lead Halide Perovskite Nanoplatelets with Monolayer-Level Thickness Control , 2016, Journal of the American Chemical Society.

[19]  Haizheng Zhong,et al.  Brightly Luminescent and Color-Tunable Colloidal CH3NH3PbX3 (X = Br, I, Cl) Quantum Dots: Potential Alternatives for Display Technology. , 2015, ACS nano.

[20]  R. Costa,et al.  Light-Emitting Electrochemical Cells Based on Hybrid Lead Halide Perovskite Nanoparticles , 2015 .

[21]  Can Ataca,et al.  Stable, Single-Layer MX2 Transition-Metal Oxides and Dichalcogenides in a Honeycomb-Like Structure , 2012 .

[22]  Yuanyuan Wang,et al.  Two-dimensional semiconductor nanocrystals: properties, templated formation, and magic-size nanocluster intermediates. , 2015, Accounts of chemical research.

[23]  G. Eda,et al.  Electronic structure and optical signatures of semiconducting transition metal dichalcogenide nanosheets. , 2015, Accounts of chemical research.

[24]  M. Fiebig,et al.  Low-threshold amplified spontaneous emission and lasing from colloidal nanocrystals of caesium lead halide perovskites , 2015, Nature Communications.

[25]  Abhishek Swarnkar,et al.  Colloidal CsPbBr3 Perovskite Nanocrystals: Luminescence beyond Traditional Quantum Dots. , 2015, Angewandte Chemie.

[26]  A Paul Alivisatos,et al.  Highly Luminescent Colloidal Nanoplates of Perovskite Cesium Lead Halide and Their Oriented Assemblies. , 2015, Journal of the American Chemical Society.

[27]  Yu Tong,et al.  Quantum Size Effect in Organometal Halide Perovskite Nanoplatelets. , 2015, Nano letters.

[28]  Aifei Wang,et al.  Ligand-Mediated Synthesis of Shape-Controlled Cesium Lead Halide Perovskite Nanocrystals via Reprecipitation Process at Room Temperature. , 2016, ACS nano.