Stable CsPbBr3 perovskite quantum dots with high fluorescence quantum yields

All-inorganic CsPbX3 (X = I, Br, Cl) perovskite nanocrystals have emerged as a new class of optoelectronic material with tunable emission wavelengths, narrow full-width at half-maximum (FWHM) and high photoluminescence quantum yields (PLQYs) (≥50% in general). However, the instability caused by high delocalization of surface ions is still the major issue that obstructs their application. The type of surface ligands plays a key role in the stability of perovskite nanocrystals. In this work, stable cubic Br-rich CsPbBr3 quantum dots (QDs) with uniform particle sizes, high quantum yields and high crystallinity were obtained by a one-step hot-injection synthesis method. Oleylamine (OM) as one of the ligands in the classic synthesis method was replaced with (3-aminopropyl)triethoxysilane (APTES). The stability of the CsPbBr3 QDs was significantly improved under different testing conditions.

[1]  Zhenyu Yang,et al.  Amine‐Free Synthesis of Cesium Lead Halide Perovskite Quantum Dots for Efficient Light‐Emitting Diodes , 2016 .

[2]  Q. Akkerman,et al.  Genesis, challenges and opportunities for colloidal lead halide perovskite nanocrystals , 2018, Nature Materials.

[3]  Jian Cheng,et al.  High-quality CsPbBr3 perovskite nanocrystals for quantum dot light-emitting diodes , 2017 .

[4]  Zeger Hens,et al.  Highly Dynamic Ligand Binding and Light Absorption Coefficient of Cesium Lead Bromide Perovskite Nanocrystals. , 2016, ACS nano.

[5]  Jonathan S. Owen,et al.  Ligand exchange and the stoichiometry of metal chalcogenide nanocrystals: spectroscopic observation of facile metal-carboxylate displacement and binding. , 2013, Journal of the American Chemical Society.

[6]  A. Anas,et al.  FRET from quantum dots to photodecompose undesired acceptors and report the condensation and decondensation of plasmid DNA. , 2012, ACS nano.

[7]  Guopeng Li,et al.  Hybrid Colloidal Stabilization Mechanism toward Improved Photoluminescence and Stability of CdSe/CdS Core/Shell Quantum Dots. , 2017, Langmuir : the ACS journal of surfaces and colloids.

[8]  Tianquan Lian,et al.  Ultrafast Interfacial Electron and Hole Transfer from CsPbBr3 Perovskite Quantum Dots. , 2015, Journal of the American Chemical Society.

[9]  S. Nie,et al.  In vivo cancer targeting and imaging with semiconductor quantum dots , 2004, Nature Biotechnology.

[10]  H. Zeng,et al.  Quantum Dot Light‐Emitting Diodes Based on Inorganic Perovskite Cesium Lead Halides (CsPbX3) , 2015, Advanced materials.

[11]  Sandeep Kumar Pathak,et al.  Perovskite Crystals for Tunable White Light Emission , 2015 .

[12]  H. Demir,et al.  Solution-processed highly bright and durable cesium lead halide perovskite light-emitting diodes. , 2016, Nanoscale.

[13]  Xurong Xu,et al.  Shape-Controlled Synthesis of All-Inorganic CsPbBr3 Perovskite Nanocrystals with Bright Blue Emission. , 2016, ACS applied materials & interfaces.

[14]  K. Drexhage,et al.  Fluorescence and lasing properties of rhodamine dyes , 1991 .

[15]  Feng Zhang,et al.  Colloidal Synthesis of Air-Stable CH3NH3PbI3 Quantum Dots by Gaining Chemical Insight into the Solvent Effects , 2017 .

[16]  Haiyang Li,et al.  Embedding Perovskite Nanocrystals into a Polymer Matrix for Tunable Luminescence Probes in Cell Imaging , 2017 .

[17]  Haizheng Zhong,et al.  Organometal halide perovskite quantum dots: synthesis, optical properties, and display applications , 2016 .

[18]  Ute Resch-Genger,et al.  Determination of the Fluorescence Quantum Yield of Quantum Dots: Suitable Procedures and Achievable Uncertainties , 2009 .

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

[20]  Chunzhong Li,et al.  Perovskite quantum dots encapsulated in electrospun fiber membranes as multifunctional supersensitive sensors for biomolecules, metal ions and pH. , 2017, Nanoscale horizons.

[21]  Min-Sang Lee,et al.  All-inorganic cesium lead halide perovskite nanocrystals for photodetector applications. , 2016, Chemical communications.

[22]  H. Zeng,et al.  CsPbX3 Quantum Dots for Lighting and Displays: Room‐Temperature Synthesis, Photoluminescence Superiorities, Underlying Origins and White Light‐Emitting Diodes , 2016 .

[23]  I. Moreels,et al.  Short-chain alcohols strip X-type ligands and quench the luminescence of PbSe and CdSe quantum dots, acetonitrile does not. , 2012, Journal of the American Chemical Society.

[24]  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.

[25]  C. Shan,et al.  High-Efficiency and Air-Stable Perovskite Quantum Dots Light-Emitting Diodes with an All-Inorganic Heterostructure. , 2017, Nano letters.

[26]  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.

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

[28]  William W. Yu,et al.  Efficient and Stable White LEDs with Silica‐Coated Inorganic Perovskite Quantum Dots , 2016, Advanced materials.

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

[30]  Xurong Xu,et al.  Water-resistant, monodispersed and stably luminescent CsPbBr3/CsPb2Br5 core–shell-like structure lead halide perovskite nanocrystals , 2017, Nanotechnology.

[31]  Ru‐Shi Liu,et al.  Mesoporous Silica Particles Integrated with All-Inorganic CsPbBr3 Perovskite Quantum-Dot Nanocomposites (MP-PQDs) with High Stability and Wide Color Gamut Used for Backlight Display. , 2016, Angewandte Chemie.