Encapsulation of lead halide perovskite nanocrystals (NCs) at single-particle-level: strategies and properties

Nanoscale ◽  
2021 ◽  
Author(s):  
Qixuan Zhong ◽  
Muhan Cao ◽  
Qiao Zhang
Keyword(s):  
Single Particle ◽  
Photophysical Properties ◽  
Perovskite Nanocrystals ◽  
Single Particle Level ◽  
Particle Level ◽  
Halide Perovskite ◽  
Lead Halide

lead halide perovskite (APbX3, A= formamidinium (FA), methylammonium (MA) or Cs, X= Cl, Br, I or their mixture) NCs have attracted unprecedented attention due to their excellent photophysical properties and...

scholarly journals Controllable Synthesis of All Inorganic Lead Halide Perovskite Nanocrystals with Various Appearances in Multiligand Reaction System

Nanomaterials ◽  
2019 ◽  
Vol 9 (12) ◽  
pp. 1751 ◽  
Author(s):  
Chen Chen ◽  
Louwen Zhang ◽  
Tielin Shi ◽  
Guanglan Liao ◽  
Zirong Tang
Keyword(s):  
Light Emitting Diode ◽  
Dominant Role ◽  
Photophysical Properties ◽  
Reaction System ◽  
Visible Spectrum ◽  
Peanut Oil ◽  
Light Emitting ◽  
Perovskite Nanocrystals ◽  
Halide Perovskite ◽  
Lead Halide

All inorganic cesium lead halide (CsPbX3, X = Cl, Br, I) perovskite nanocrystals (PNCs) exhibit promising applications in light-emitting devices due to their excellent photophysical properties. Herein, we developed a low-cost and convenient method for the preparation of CsPbX3 PNCs in a multiligand-assisted reaction system where peanut oil is applied as a ligand source. The mixed-halide PNCs with tunable optical-band gap were prepared by mixing the single-halide perovskite solutions at room temperature. The resulting PNCs had good monodispersity, with dimensions of 8–10 nm, high photoluminescence quantum yield (96.9%), narrow emission widths (15–34 nm), and tunable emission wavelength (408–694 nm), covering the entire visible spectrum. Additionally, various morphologies of PNCs, such as nanospheres, nanocubes, and nanowires, were obtained by controlling reaction temperature and time, and the amount of oleamine with multiple ligands in peanut oil potentially playing a dominant role in the nucleation/growth processes of our PNCs. Finally, the resulting CsPbBr3 PNCs were employed to develop a white light-emitting diode (WLED), demonstrating the potential lighting applications for our method.

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...

Insights into the local structure of dopants, doping efficiency, and luminescence properties of lanthanide-doped CsPbCl3 perovskite nanocrystals

2019 ◽  
Vol 7 (10) ◽  
pp. 3037-3048 ◽  
Author(s):  
Ju-Ping Ma ◽  
Ya-Meng Chen ◽  
Lu-Min Zhang ◽  
Shao-Qiang Guo ◽  
Jian-Dang Liu ◽  
...  
Keyword(s):  
Local Structure ◽  
Photophysical Properties ◽  
Luminescence Properties ◽  
Perovskite Nanocrystals ◽  
Halide Perovskite ◽  
Lead Halide

Our results greatly deepen the understanding of the structural and photophysical properties of lanthanide-doped lead halide perovskite NCs.

Improved photophysical properties and durability of CsPbBr3 NCs endowed by inorganic oxoacid and bromide ions

Nanoscale ◽  
2021 ◽  
Author(s):  
Shuhua Chen ◽  
Qixuan Zhong ◽  
Jun Liu ◽  
Wenhao Guan ◽  
Pengli Li ◽  
...  
Keyword(s):  
Optical Properties ◽  
Photophysical Properties ◽  
Promising Candidate ◽  
Perovskite Nanocrystals ◽  
Inorganic Lead ◽  
Bromide Ions ◽  
Halide Perovskite ◽  
Lead Halide

All-inorganic lead halide perovskite nanocrystals (NCs) have been a promising candidate for various optoelectrical fields. It is still challenging to further enhance their optical properties and stability to meet the...

Rapid sampling during synthesis of lead halide perovskite nanocrystals for spectroscopic measurement

MRS Advances ◽  
2019 ◽  
Vol 4 (36) ◽  
pp. 1957-1964 ◽  
Author(s):  
James C. Sadighian ◽  
Michael L. Crawford ◽  
Cathy Y. Wong
Keyword(s):  
Surface Passivation ◽  
Photophysical Properties ◽  
Spectroscopic Measurement ◽  
Ex Situ ◽  
Spectroscopic Measurements ◽  
Perovskite Nanocrystals ◽  
Rapid Sampling ◽  
Fluorescence Measurements ◽  
Halide Perovskite ◽  
Lead Halide

ABSTRACTThe photophysical properties of lead halide perovskite nanocrystals (NCs) are critical to their potential application in light emitting devices and other optoelectronics, and are typically characterized using optical spectroscopies. Measurements of nuclei and nascent NC photophysics during synthesis provide insight into how the reaction can be changed to control the properties of the resulting NCs. However, these measurements are typically only performed ex situ after growth is halted by centrifuging the reaction mixture for several minutes. Here, a method is reported to rapidly sample the reaction mixture during a solvation-limited synthesis to enable multiple spectroscopic measurements during nucleation and NC growth. Absorbance and fluorescence measurements of a reaction mixture during the formation of methylammonium lead triiodide perovskite NCs are reported. The changing positions of spectral features as a function of reaction time show the expected weakening of exciton confinement during NC growth. The evolving fluorescence spectra demonstrate that the capping and surface passivation of nascent NCs changes during the reaction. The species in the reaction mixture, particularly during the early stages of the synthesis, are shown to be unstable. This indicates that, even for a relatively slow solvation-limited reaction, the photophysics of the reaction mixture can only be accurately captured if spectroscopic measurements are completed within seconds of sampling. The common use of centrifugation to quench NC syntheses prior to spectroscopic measurement biases the NC population towards more stable, well-capped NCs and does not accurately report on the full NC population in a reaction mixture.

scholarly journals Photophysical properties of wavelength-tunable methylammonium lead halide perovskite nanocrystals

2017 ◽  
Vol 5 (1) ◽  
pp. 118-126 ◽  
Author(s):  
Daniel J. Freppon ◽  
Long Men ◽  
Sadie J. Burkhow ◽  
Jacob W. Petrich ◽  
Javier Vela ◽  
...  
Keyword(s):  
Photophysical Properties ◽  
Perovskite Nanocrystals ◽  
Wavelength Tunable ◽  
Halide Perovskite ◽  
Lead Halide

The single halide as well as the majority of the mixed halide nanocrystals do not show luminescence intermittency.

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