Polymer-Enhanced Stability of Inorganic Perovskite Nanocrystals and Their Application in Color Conversion LEDs.

Cesium lead halide (CsPbX3, X = Cl, Br, I) nanocrystals (NCs) offer exceptional optical properties for several potential applications but their implementation is hindered by a low chemical and structural stability and limited processability. In the present work, we developed a new method to efficiently coat CsPbX3 NCs, which resulted in their increased chemical and optical stability as well as processability. The method is based on the incorporation of poly(maleic anhydride-alt-1-octadecene) (PMA) into the synthesis of the perovskite NCs. The presence of PMA in the ligand shell stabilizes the NCs by tightening the ligand binding, limiting in this way the NC surface interaction with the surrounding media. We further show that these NCs can be embedded in self-standing silicone/glass plates as down-conversion filters for the fabrication of monochromatic green and white light emitting diodes (LEDs) with narrow bandwidths and appealing color characteristics.

[1]  A. Samanta,et al.  Fluorescence Blinking and Photoactivation of All-Inorganic Perovskite Nanocrystals CsPbBr3 and CsPbBr2I. , 2016, The journal of physical chemistry letters.

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

[3]  Hilmi Volkan Demir,et al.  Color science of nanocrystal quantum dots for lighting and displays , 2013 .

[4]  Andrea Ragusa,et al.  Water solubilization of hydrophobic nanocrystals by means of poly(maleic anhydride-alt-1-octadecene) , 2008 .

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

[6]  J. Rondinelli,et al.  Octahedral Rotation Preferences in Perovskite Iodides and Bromides. , 2016, The journal of physical chemistry letters.

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

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

[9]  Ki-Heon Lee,et al.  Preparation of a photo-degradation- resistant quantum dot–polymer composite plate for use in the fabrication of a high-stability white-light-emitting diode , 2013, Nanotechnology.

[10]  H. Zeng,et al.  Nanocrystals: Quantum Dot Light‐Emitting Diodes Based on Inorganic Perovskite Cesium Lead Halides (CsPbX3) (Adv. Mater. 44/2015) , 2015, Advanced materials.

[11]  Davy Sinnaeve.  The Stejskal–Tanner equation generalized for any gradient shape—an overview of most pulse sequences measuring free diffusion , 2012 .

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

[14]  Youngsun Kim,et al.  Degradation Characteristics of Red Light-Emitting CuInS2/ZnS Quantum Dots as a Wavelength Converter for LEDs , 2011 .

[15]  P. Yang,et al.  Solution‐Phase Synthesis of Cesium Lead Halide Perovskite Nanowires. , 2015 .

[16]  Yu Zhang,et al.  Enhancing the Brightness of Cesium Lead Halide Perovskite Nanocrystal Based Green Light-Emitting Devices through the Interface Engineering with Perfluorinated Ionomer. , 2016, Nano letters.

[17]  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.

[18]  Magnetic nanocarriers with tunable pH dependence for controlled loading and release of cationic and anionic payloads. , 2011, Advanced materials.

[19]  Manas R. Parida,et al.  Air-Stable Surface-Passivated Perovskite Quantum Dots for Ultra-Robust, Single- and Two-Photon-Induced Amplified Spontaneous Emission. , 2015, The journal of physical chemistry letters.

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

[21]  J. Brozek,et al.  Phase transitions in ternary caesium lead bromide , 2003 .

[22]  Mathias Nilsson,et al.  Improving the accuracy of pulsed field gradient NMR diffusion experiments: Correction for gradient non-uniformity. , 2009, Journal of magnetic resonance.

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

[24]  Oleksandr Voznyy,et al.  Efficient Luminescence from Perovskite Quantum Dot Solids. , 2015, ACS applied materials & interfaces.

[25]  Haizheng Zhong,et al.  Water resistant CsPbX3 nanocrystals coated with polyhedral oligomeric silsesquioxane and their use as solid state luminophores in all-perovskite white light-emitting devices , 2016, Chemical science.

[26]  Leeor Kronik,et al.  High Chloride Doping Levels Stabilize the Perovskite Phase of Cesium Lead Iodide. , 2016, Nano letters.

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

[28]  Heesun Yang,et al.  Efficient White-Light-Emitting Diodes Fabricated from Highly Fluorescent Copper Indium Sulfide Core/Shell Quantum Dots , 2012 .

[29]  Rainer F. Mahrt,et al.  Single Cesium Lead Halide Perovskite Nanocrystals at Low Temperature: Fast Single-Photon Emission, Reduced Blinking, and Exciton Fine Structure , 2016, ACS nano.

[30]  J. Pérez‐Prieto,et al.  Maximizing the emissive properties of CH3NH3PbBr3 perovskite nanoparticles , 2015 .

[31]  H. Zeng,et al.  Nonlinear Absorption and Low-Threshold Multiphoton Pumped Stimulated Emission from All-Inorganic Perovskite Nanocrystals. , 2016, Nano letters.

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

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

[34]  Ru‐Shi Liu,et al.  Critical Red Components for Next-Generation White LEDs. , 2016, The journal of physical chemistry letters.

[35]  Heesun Yang,et al.  Silica-embedded quantum dots as downconverters of light-emitting diode and effect of silica on device operational stability , 2013 .

[36]  Liberato Manna,et al.  X-ray Lithography on Perovskite Nanocrystals Films: From Patterning with Anion-Exchange Reactions to Enhanced Stability in Air and Water , 2015, ACS nano.

[37]  Feng Gao,et al.  Colloidal metal halide perovskite nanocrystals: synthesis, characterization, and applications , 2016 .

[38]  Miroslaw Batentschuk,et al.  Silica‐Coated InP/ZnS Nanocrystals as Converter Material in White LEDs , 2008 .

[39]  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.

[40]  Claudio Canale,et al.  Colloidal Synthesis of Quantum Confined Single Crystal CsPbBr3 Nanosheets with Lateral Size Control up to the Micrometer Range , 2016, Journal of the American Chemical Society.