Insights into the role of the lead/surfactant ratio in the formation and passivation of cesium lead bromide perovskite nanocrystals

Nanoscale ◽  
2020 ◽  
Vol 12 (2) ◽  
pp. 623-637 ◽  
Author(s):  
Roberto Grisorio ◽  
Elisabetta Fanizza ◽  
Ignazio Allegretta ◽  
Davide Altamura ◽  
Marinella Striccoli ◽  
...  
Keyword(s):  
Surface Passivation ◽  
Perovskite Nanocrystals ◽  
Lead Bromide

The lead/surfactant ratio controls the formation, composition and surface passivation of cesium lead bromide perovskite nanocrystals.

A relationship between the surface composition and spectroscopic properties of cesium lead bromide (CsPbBr3) perovskite nanocrystals: focusing on photoluminescence efficiency

Nanoscale ◽  
2020 ◽  
Vol 12 (3) ◽  
pp. 1563-1570 ◽  
Author(s):  
Jumi Park ◽  
Youngsik Kim ◽  
Sujin Ham ◽  
Ju Young Woo ◽  
Taehee Kim ◽  
...  
Keyword(s):  
Surface Composition ◽  
Spectroscopic Properties ◽  
Perovskite Nanocrystals ◽  
Lead Bromide ◽  
Photoluminescence Efficiency

This work explored the role of ZnBr2 in the surface composition and photoluminescence stability of CsPbBr3 nanocrystals.

scholarly journals Alloy CsCdxPb1–xBr3 Perovskite Nanocrystals: The Role of Surface Passivation in Preserving Composition and Blue Emission

2020 ◽  
Vol 32 (24) ◽  
pp. 10641-10652
Author(s):  
Muhammad Imran ◽  
Julien Ramade ◽  
Francesco Di Stasio ◽  
Manuela De Franco ◽  
Joka Buha ◽  
...  
Keyword(s):  
Surface Passivation ◽  
Blue Emission ◽  
Perovskite Nanocrystals

Hollow Metal Halide Perovskite Nanocrystals with Efficient Blue Emissions

2019 ◽  
Author(s):  
Michael Worku ◽  
Yu Tian ◽  
Chenkun Zhou ◽  
Haoran Lin ◽  
Maya Chaaban ◽  
...  
Keyword(s):  
Precursor Solution ◽  
Visible Spectral Region ◽  
Metal Halide ◽  
Synthetic Control ◽  
Perovskite Nanocrystals ◽  
Highly Efficient ◽  
Quantum Confinement Effects ◽  
Metal Halide Perovskite ◽  
Lead Bromide ◽  
Halide Perovskite

Metal halide perovskite nanocrystals (NCs) have emerged as a new generation light emitting materials with narrow emissions and high photoluminescence quantum efficiencies (PLQEs). Various types of perovskite NCs, e.g. platelets, wires, and cubes, have been discovered to exhibit tunable emissions across the whole visible spectral region. Despite remarkable advances in the field of metal halide perovskite NCs over the last few years, many nanostructures in inorganic NCs have yet been realized in metal halide perovskites and producing highly efficient blue emitting perovskite NCs remains challenging and of great interest. Here we report for the first time the discovery of highly efficient blue emitting cesium lead bromide perovskite (CsPbBr3) NCs with hollow structures. By facile solution processing of cesium lead bromide perovskite precursor solution containing additional ethylenediammonium bromide and sodium bromide, in-situ formation of hollow CsPbBr3 NCs with controlled particle and pore sizes is realized. Synthetic control of hollow nanostructures with quantum confinement effects results in color tuning of CsPbBr3 NCs from green to blue with high PLQEs of up to 81 %.<br><div><br></div>

The role of surface chemical states on the photocatalytic behavior of all-inorganic mixed halide perovskite nanocrystals

2019 ◽  
Author(s):  
Andrés Fabián Gualdrón-Reyes ◽  
Iván Mora-Seró ◽  
Eliseo Amado-González ◽  
Jorge-Enrique Rueda-P ◽  
Rogelio Ospina ◽  
...  
Keyword(s):  
Surface Chemical ◽  
Perovskite Nanocrystals ◽  
Chemical States ◽  
Halide Perovskite

Bromopropane as a Novel Bromine Precursor for the Completely Amine Free Colloidal Synthesis of Ultra-Stable and Highly Luminescent Green-Emitting Cesium Lead Bromide (CsPbBr3) Perovskite Nanocrystals

Nanoscale ◽  
2021 ◽  
Author(s):  
Syed Akhil ◽  
V.G.Vasavi Dutt ◽  
Nimai Mishra
Keyword(s):  
Optoelectronic Devices ◽  
Colloidal Synthesis ◽  
Ambient Conditions ◽  
Active Materials ◽  
Perovskite Nanocrystals ◽  
Lead Bromide ◽  
Halide Perovskite ◽  
Lead Halide ◽  
Poor Stability

Recently lead halide perovskite nanocrystals (PNCs) have attracted intense interest as promising active materials for optoelectronic devices. However, their extensive applications are still hampered by poor stability in ambient conditions....

scholarly journals Role of ALD Al2O3 Surface Passivation on the Performance of p-Type Cu2O Thin Film Transistors

2021 ◽  
Vol 13 (3) ◽  
pp. 4156-4164
Author(s):  
Mari Napari ◽  
Tahmida N. Huq ◽  
David J. Meeth ◽  
Mikko J. Heikkilä ◽  
Kham M. Niang ◽  
...  
Keyword(s):  
Thin Film ◽  
Thin Film Transistors ◽  
Surface Passivation ◽  
Cu2o Thin Film ◽  
P Type

The role of EuBr2 in modulating the crystallization and luminescence of caesium lead bromide

2021 ◽  
Vol 137 ◽  
pp. 111191
Author(s):  
Ji Lei ◽  
Lo-Yueh Chang ◽  
Zhaohui Dong ◽  
Lijia Liu
Keyword(s):  
Lead Bromide

scholarly journals Influence of TOPO and TOPO-CdSe/ZnS Quantum Dots on Luminescence Photodynamics of InP/InAsP/InPHeterostructure Nanowires

Nanomaterials ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 640
Author(s):  
Artem I. Khrebtov ◽  
Vladimir V. Danilov ◽  
Anastasia S. Kulagina ◽  
Rodion R. Reznik ◽  
Ivan D. Skurlov ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Excited States ◽  
Molecular Beam ◽  
Surface Passivation ◽  
Low Energy ◽  
Trioctylphosphine Oxide ◽  
Reverse Transfer ◽  
Semiconductor Heterostructure ◽  
Ligand Type

The passivation influence by ligands coverage with trioctylphosphine oxide (TOPO) and TOPO including colloidal CdSe/ZnS quantum dots (QDs) on optical properties of the semiconductor heterostructure, namely an array of InP nanowires (NWs) with InAsP nanoinsertion grown by Au-assisted molecular beam epitaxy on Si (111) substrates, was investigated. A significant dependence of the photoluminescence (PL) dynamics of the InAsP insertions on the ligand type was shown, which was associated with the changes in the excitation translation channels in the heterostructure. This change was caused by a different interaction of the ligand shells with the surface of InP NWs, which led to the formation of different interfacial low-energy states at the NW-ligand boundary, such as surface-localized antibonding orbitals and hybridized states that were energetically close to the radiating state and participate in the transfer of excitation. It was shown that the quenching of excited states associated with the capture of excitation to interfacial low-energy traps was compensated by the increasing role of the “reverse transfer” mechanism. As a result, the effectiveness of TOPO-CdSe/ZnS QDs as a novel surface passivation coating was demonstrated.

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