scholarly journals Unconventional route to dual-shelled organolead halide perovskite nanocrystals with controlled dimensions, surface chemistry, and stabilities

2019 ◽  
Vol 5 (11) ◽  
pp. eaax4424 ◽  
Author(s):  
Yanjie He ◽  
Young Jun Yoon ◽  
Yeu Wei Harn ◽  
Gill V. Biesold-McGee ◽  
Shuang Liang ◽  
...  
Keyword(s):  
Surface Chemistry ◽  
Colloidal Stability ◽  
Core Shell ◽  
Core Diameter ◽  
Perovskite Nanocrystals ◽  
The Past ◽  
Halide Perovskite ◽  
Conventional Methods ◽  
The Stability ◽  
Organolead Halide

The past few years have witnessed rapid advances in the synthesis of high-quality perovskite nanocrystals (PNCs). However, despite the impressive developments, the stability of PNCs remains a substantial challenge. The ability to reliably improve stability of PNCs while retaining their individual nanometer size represents a critical step that underpins future advances in optoelectronic applications. Here, we report an unconventional strategy for crafting dual-shelled PNCs (i.e., polymer-ligated perovskite/SiO2 core/shell NCs) with exquisite control over dimensions, surface chemistry, and stabilities. In stark contrast to conventional methods, our strategy relies on capitalizing on judiciously designed star-like copolymers as nanoreactors to render the growth of core/shell NCs with controlled yet tunable perovskite core diameter, SiO2 shell thickness, and surface chemistry. Consequently, the resulting polymer-tethered perovskite/SiO2 core/shell NCs display concurrently a stellar set of substantially improved stabilities (i.e., colloidal stability, chemical composition stability, photostability, water stability), while having appealing solution processability, which are unattainable by conventional methods.

Core/Shell Metal Halide Perovskite Nanocrystals for Optoelectronic Applications

2021 ◽  
pp. 2100438
Author(s):  
Chengxi Zhang ◽  
Jiayi Chen ◽  
Lingmei Kong ◽  
Lin Wang ◽  
Sheng Wang ◽  
...  
Keyword(s):  
Metal Halide ◽  
Core Shell ◽  
Perovskite Nanocrystals ◽  
Metal Halide Perovskite ◽  
Halide Perovskite ◽  
Optoelectronic Applications

scholarly journals Highly fluorescent CsPbBr3/TiO2 core/shell perovskite nanocrystals with excellent stability

2021 ◽  
Vol 3 (6) ◽  
Author(s):  
Haitao Chen ◽  
Renhua Li ◽  
Anqi Guo ◽  
Yu Xia
Keyword(s):  
Identical Particle ◽  
Core Shell ◽  
List Type ◽  
Easy Method ◽  
Time Resolved ◽  
Perovskite Nanocrystals ◽  
Promising Application ◽  
The Stability ◽  
Time Resolved Photoluminescence ◽  
Excellent Stability

AbstractThe poor stability of CsPbX3 (X = Cl, Br, I) perovskite nanocrystals is the most impediment to its application in the field of photoelectrics. In this work, monodisperse CsPbBr3/TiO2 nanocrystals are successfully prepared by coating titanium precursor on the surface of colloidal CsPbBr3 nanocrystals at room temperature. The CsPbBr3/TiO2 nanocomposites exhibit excellent stability, remaining the identical particle size (9.2 nm), crystal structures and optical properties. Time-resolved photoluminescence decay shows that the lifetime of CsPbBr3/TiO2 nanocrystals is about 4.04 ns and keeps great stability after lasting two months in the air. Results show that the coating of TiO2 on CsPbBr3 NCs greatly suppressed the anion exchange and photodegradation, which are the main reasons for dramatically improving their chemical stability and photostability. The results provide an effective method to solve the stability problem of perovskite nanostructures and are expected to have a promising application in optoelectronic fieldsArticle highlights 1. Prepared the all-inorganic CsPbBr3/TiO2 core/shell perovskite nanocrystals by an easy method. 2. Explored its essences of PL and lifetime of the synthesized CsPbBr3/TiO2 perovskite nanocrystals. 3. CsPbBr3/TiO2 nanocrystals show the great thermal stability after the post-annealing. 4. The CsPbBr3/TiO2 nanocrystals have a high PLQY and have a promising application in solar cells.

scholarly journals Surface Modification for Improving Photoredox Activity of CsPbBr3 Nanocrystals

2021 ◽  
Author(s):  
Syed Akhil ◽  
V.G.Vasavi Dutt ◽  
Nimai Mishra
Keyword(s):  
Surface Modification ◽  
Excited State ◽  
Surface Chemistry ◽  
Perovskite Nanocrystals ◽  
Inorganic Lead ◽  
Halide Perovskite ◽  
Photocatalytic Reactions ◽  
Lead Halide

In recent years inorganic lead halide perovskite nanocrystals (PNCs) have been used in photocatalytic reactions. The surface chemistry of the PNCs can play an important role in the excited state...

CsPbX3/Cs4PbX6 core/shell perovskite nanocrystals

2018 ◽  
Vol 54 (49) ◽  
pp. 6300-6303 ◽  
Author(s):  
Chao Jia ◽  
Hui Li ◽  
Xianwei Meng ◽  
Hongbo Li
Keyword(s):  
Core Shell ◽  
Seeded Growth ◽  
Perovskite Nanocrystals ◽  
Halide Perovskite ◽  
Growth Approach ◽  
First Time ◽  
Lead Halide

The synthesis of 3D/0D core/shell lead halide perovskite nanocrystals has been realized using the seeded growth approach for the first time.

scholarly journals Advances in the Stability of Halide Perovskite Nanocrystals

Materials ◽  
2019 ◽  
Vol 12 (22) ◽  
pp. 3733 ◽  
Author(s):  
Maning Liu ◽  
Anastasia Matuhina ◽  
Haichang Zhang ◽  
Paola Vivo
Keyword(s):  
Special Focus ◽  
Next Generation ◽  
Facile Synthesis ◽  
Research Directions ◽  
Rapid Degradation ◽  
Perovskite Nanocrystals ◽  
Final Goal ◽  
Tunable Properties ◽  
Halide Perovskite ◽  
The Stability

Colloidal halide perovskite nanocrystals are promising candidates for next-generation optoelectronics because of their facile synthesis and their outstanding and size-tunable properties. However, these materials suffer from rapid degradation, similarly to their bulk perovskite counterparts. Here, we survey the most recent strategies to boost perovskite nanocrystals stability, with a special focus on the intrinsic chemical- and compositional-factors at synthetic and post-synthetic stage. Finally, we review the most promising approaches to address the environmental extrinsic stability of perovskite nanocrystals (PNCs). Our final goal is to outline the most promising research directions to enhance PNCs’ lifetime, bringing them a step closer to their commercialization.

Formation of highly uniform thinly-wrapped CsPbX3@silicone nanocrystals via self-hydrolysis: suppressed anion exchange and superior stability in polar solvents

2019 ◽  
Vol 7 (32) ◽  
pp. 9813-9819 ◽  
Author(s):  
Haifeng Zhao ◽  
Linfeng Wei ◽  
Peng Zeng ◽  
Mingzhen Liu
Keyword(s):  
Crystal Lattice ◽  
Anion Exchange ◽  
Polar Solvents ◽  
Perovskite Nanocrystals ◽  
Ionic Nature ◽  
Halide Perovskite ◽  
The Stability ◽  
Highly Uniform ◽  
Lead Halide

Cesium lead halide perovskite nanocrystals show promising potential in optical and photonic applications, whereas it is challenging to improve the stability of nanocrystals due to their highly ionic nature and inconsistency in the crystal lattice.

A general approach to reaching perovskite nanocrystals with insulating metal sulfate shells

Nanoscale ◽  
2021 ◽  
Author(s):  
Feng Gao ◽  
Jianghua Wu ◽  
Yilin Zhao ◽  
Tinglu Song ◽  
Zhengtao Deng ◽  
...  
Keyword(s):  
Single Particle ◽  
Semiconductor Nanocrystals ◽  
Core Shell ◽  
Metal Sulfate ◽  
Perovskite Nanocrystals ◽  
Metal Halide Perovskite ◽  
Particle Level ◽  
Soft Metal ◽  
Halide Perovskite ◽  
Core Shell Structure

The strategy of constructing core/shell structure is of great importance for emitting semiconductor nanocrystals. However, the coating on soft metal halide perovskite nanocrystals at the single particle level remains a...

Exploring the surface chemistry of cesium lead halide perovskite nanocrystals

Nanoscale ◽  
2019 ◽  
Vol 11 (3) ◽  
pp. 986-999 ◽  
Author(s):  
Roberto Grisorio ◽  
Milvia Elena Di Clemente ◽  
Elisabetta Fanizza ◽  
Ignazio Allegretta ◽  
Davide Altamura ◽  
...  
Keyword(s):  
Surface Chemistry ◽  
Surface Passivation ◽  
Organic Ligands ◽  
Perovskite Nanocrystals ◽  
Halide Perovskite ◽  
Lead Halide

The surface passivation by organic ligands of differently composed cesium lead halide perovskite nanocrystals was explored.

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