Direct Hot-Injection Synthesis of Lead Halide Perovskite Nanocubes in Acrylic Monomers for Ultrastable and Bright Nanocrystal–Polymer Composite Films

2019 ◽  
Vol 11 (9) ◽  
pp. 9317-9325 ◽  
Author(s):  
Jianyu Tong ◽  
Jiajing Wu ◽  
Wei Shen ◽  
Yukang Zhang ◽  
Yao Liu ◽  
...  
Keyword(s):  
Polymer Composite ◽  
Composite Films ◽  
Acrylic Monomers ◽  
Hot Injection ◽  
Halide Perovskite ◽  
Lead Halide

scholarly journals Photoluminescence and Photoconductivity of Lead Halide Perovskite Films Modified with Mixed Cellulose Esters-=SUP=-1-=/SUP=-

2021 ◽  
Vol 91 (6) ◽  
pp. 985
Author(s):  
A.N. Aleshin ◽  
P.P. Shirinkin ◽  
A.K. Khripunov ◽  
N.N. Saprykina ◽  
I.P. Shcherbakov ◽  
...  
Keyword(s):  
Composite Films ◽  
Optical Excitation ◽  
Excitation Power ◽  
Solar Simulator ◽  
Cellulose Esters ◽  
Exciton Recombination ◽  
Halide Perovskite ◽  
Mixed Cellulose Esters ◽  
Lead Halide ◽  
Selection Of

We have investigated the photoluminescence (PL) and photoconductivity of lead halide perovskite (CH3NH3PbBr3) films modified with different mixed cellulose esters (CEs). It was shown that the absorbance and PL spectra of CH3NH3PbBr3 : CE films contain contributions of both the CH3NH3PbBr3 and CE with the dominant contribution to the PL from perovskite component. The dependences of the integral PL intensities of the CH3NH3PbBr3 : CE films on the optical excitation power turned out to be sublinear. This indicates that exciton recombination, as well as recombination via impurity levels, occur in CH3NH3PbBr3 : CE films at high excitation power levels. The conductivity of CH3NH3PbBr3 : CE films at 300 K increases up to ~90 times when illuminated by a solar simulator, and this effect is environmentally stable due to the formation of hydrogen bonds between CE and the lead halide perovskite CH3NH3PbBr3. It is expected that appropriate selection of CE and optimization of CE inclusion will improve the optoelectronic properties and stability of composite films based on lead halide perovskite-CE composites.

scholarly journals Modular Zwitterion-Functionalized Poly(Isopropyl Methacrylate) Polymers for Hosting Luminescent Lead-Halide Perovskite Nanocrystals

2021 ◽  
Author(s):  
Theodore A. Cohen ◽  
Yunping Huang ◽  
Nico A. Bricker ◽  
Connor S. Juhl ◽  
Tyler J. Milstein ◽  
...  
Keyword(s):  
Composite Films ◽  
Continuous Illumination ◽  
Quantum Yields ◽  
Green Solvents ◽  
Ambient Conditions ◽  
Perovskite Nanocrystals ◽  
Zwitterionic Polymers ◽  
Methacrylate Polymers ◽  
Halide Perovskite ◽  
Lead Halide

Inorganic lead-halide perovskite nanocrystals (NCs) are an exciting class of luminescent materials with high defect tolerance and broad spectral tunability, but such NCs are vulnerable to degradation under ambient conditions. Here, we report a class of modular zwitterion-functionalized isopropyl methacrylate polymers designed to stabilize a wide variety of perovskite NCs of different compositions, while also enabling processing in green solvents. Specifically, we report polymers in which the zwitterion spacing is tuned to accommodate the different lattice parameters of CsPb(Cl<sub>1-<i>x</i></sub>Br<i><sub>x</sub></i>)<sub>3</sub> and CsPbI<sub>3</sub> NCs, and we report partially fluorinated polymers prepared to accommodate the needs of infrared-emitting NCs. We show that as-synthesized CsPbBr<sub>3</sub>, CsPbI<sub>3</sub>, and Yb<sup>3+</sup>:CsPbCl<sub>3</sub> NCs are easily transferred into these zwitterionic polymers <i>via</i> a simple ligand-exchange procedure. These NC/polymer composites were then cast into thin films that showed substantially improved photoluminescence (PL) and stability compared with more conventional NC/polymer films. Specifically, CsPbBr<sub>3</sub> and CsPbI<sub>3</sub> NCs in films of their appropriately designed polymers had PL quantum yields of ~90% and ~80%, respectively. PL quantum yields decreased under continuous illumination, but self-healed completely after dark storage. We also found that all the NC compositions studied here maintain their PL quantum yields in NC/polymer composite films even after 1 year of ambient storage. These encouraging results demonstrate the utility of such modular zwitterion-functionalized polymers for hosting specific perovskite NCs, potentially opening avenues for robust new photonic applications of this important class of NCs.

In Situ Fabrication of Halide Perovskite Nanocrystal-Embedded Polymer Composite Films with Enhanced Photoluminescence for Display Backlights

2016 ◽  
Vol 28 (41) ◽  
pp. 9163-9168 ◽  
Author(s):  
Qingchao Zhou ◽  
Zelong Bai ◽  
Wen-gao Lu ◽  
Yongtian Wang ◽  
Bingsuo Zou ◽  
...  
Keyword(s):  
Polymer Composite ◽  
Composite Films ◽  
Enhanced Photoluminescence ◽  
In Situ Fabrication ◽  
Halide Perovskite

Shape Tailoring of Iodine‐Based Cesium Lead Halide Perovskite Nanocrystals in Hot‐Injection Methods

ChemNanoMat ◽  
2020 ◽  
Vol 6 (3) ◽  
pp. 356-361 ◽  
Author(s):  
Roberto Grisorio ◽  
Elisabetta Fanizza ◽  
Marinella Striccoli ◽  
Davide Altamura ◽  
Cinzia Giannini ◽  
...  
Keyword(s):  
Perovskite Nanocrystals ◽  
Hot Injection ◽  
Injection Methods ◽  
Halide Perovskite ◽  
Lead Halide

In Situ Siloxane Passivation of Colloidal Lead Halide Perovskite via Hot Injection for Light-Emitting Diodes

2021 ◽  
Author(s):  
Xianghua Wang ◽  
Yong Yang ◽  
Xuedong Li ◽  
Wenbin Li ◽  
Juntao Hu ◽  
...  
Keyword(s):  
Light Emitting Diodes ◽  
Light Emitting ◽  
Hot Injection ◽  
Halide Perovskite ◽  
Colloidal Lead ◽  
Lead Halide

scholarly journals Modular Zwitterion-Functionalized Poly(Isopropyl Methacrylate) Polymers for Hosting Luminescent Lead-Halide Perovskite Nanocrystals

2021 ◽  
Author(s):  
Theodore A. Cohen ◽  
Yunping Huang ◽  
Nico A. Bricker ◽  
Connor S. Juhl ◽  
Tyler J. Milstein ◽  
...  
Keyword(s):  
Composite Films ◽  
Continuous Illumination ◽  
Quantum Yields ◽  
Green Solvents ◽  
Ambient Conditions ◽  
Perovskite Nanocrystals ◽  
Zwitterionic Polymers ◽  
Methacrylate Polymers ◽  
Halide Perovskite ◽  
Lead Halide

Inorganic lead-halide perovskite nanocrystals (NCs) are an exciting class of luminescent materials with high defect tolerance and broad spectral tunability, but such NCs are vulnerable to degradation under ambient conditions. Here, we report a class of modular zwitterion-functionalized isopropyl methacrylate polymers designed to stabilize a wide variety of perovskite NCs of different compositions, while also enabling processing in green solvents. Specifically, we report polymers in which the zwitterion spacing is tuned to accommodate the different lattice parameters of CsPb(Cl<sub>1-<i>x</i></sub>Br<i><sub>x</sub></i>)<sub>3</sub> and CsPbI<sub>3</sub> NCs, and we report partially fluorinated polymers prepared to accommodate the needs of infrared-emitting NCs. We show that as-synthesized CsPbBr<sub>3</sub>, CsPbI<sub>3</sub>, and Yb<sup>3+</sup>:CsPbCl<sub>3</sub> NCs are easily transferred into these zwitterionic polymers <i>via</i> a simple ligand-exchange procedure. These NC/polymer composites were then cast into thin films that showed substantially improved photoluminescence (PL) and stability compared with more conventional NC/polymer films. Specifically, CsPbBr<sub>3</sub> and CsPbI<sub>3</sub> NCs in films of their appropriately designed polymers had PL quantum yields of ~90% and ~80%, respectively. PL quantum yields decreased under continuous illumination, but self-healed completely after dark storage. We also found that all the NC compositions studied here maintain their PL quantum yields in NC/polymer composite films even after 1 year of ambient storage. These encouraging results demonstrate the utility of such modular zwitterion-functionalized polymers for hosting specific perovskite NCs, potentially opening avenues for robust new photonic applications of this important class of NCs.

A thiourea additive-based quadruple cation lead halide perovskite with an ultra-large grain size for efficient perovskite solar cells

Nanoscale ◽  
2019 ◽  
Vol 11 (45) ◽  
pp. 21824-21833 ◽  
Author(s):  
Jyoti V. Patil ◽  
Sawanta S. Mali ◽  
Chang Kook Hong
Keyword(s):  
Thin Films ◽  
Grain Size ◽  
Solar Cells ◽  
Power Conversion Efficiency ◽  
Conversion Efficiency ◽  
Power Conversion ◽  
Perovskite Solar Cells ◽  
Inorganic Perovskite ◽  
Halide Perovskite ◽  
Lead Halide

Controlling the grain size of the organic–inorganic perovskite thin films using thiourea additives now crossing 2 μm size with >20% power conversion efficiency.

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