Controlling Quantum-Well Width Distribution and Crystal Orientation in Two-Dimensional Tin Halide Perovskites via a Strong Interlayer Electrostatic Interaction

2021 ◽  
Author(s):  
Tao Zhang ◽  
Takahito Nakajima ◽  
Honghao Cao ◽  
Qiang Sun ◽  
Huaxia Ban ◽  
...  
Keyword(s):  
Quantum Well ◽  
Electrostatic Interaction ◽  
Crystal Orientation ◽  
Two Dimensional ◽  
Width Distribution ◽  
Quantum Well Width ◽  
Halide Perovskites

scholarly journals Dimension control of in situ fabricated CsPbClBr2 nanocrystal films toward efficient blue light-emitting diodes

2020 ◽  
Vol 11 (1) ◽  
Author(s):  
Chenhui Wang ◽  
Dengbao Han ◽  
Junhui Wang ◽  
Yingguo Yang ◽  
Xinyue Liu ◽  
...  
Keyword(s):  
Quantum Well ◽  
Light Emitting Diodes ◽  
Blue Emission ◽  
Light Emitting ◽  
Mixed Ligands ◽  
Dimension Control ◽  
Nanocrystal Films ◽  
Width Distribution ◽  
Quantum Well Width

AbstractIn the field of perovskite light-emitting diodes (PeLEDs), the performance of blue emissive electroluminescence devices lags behind the other counterparts due to the lack of fabrication methodology. Herein, we demonstrate the in situ fabrication of CsPbClBr2 nanocrystal films by using mixed ligands of 2-phenylethanamine bromide (PEABr) and 3,3-diphenylpropylamine bromide (DPPABr). PEABr dominates the formation of quasi-two-dimensional perovskites with small-n domains, while DPPABr induces the formation of large-n domains. Strong blue emission at 470 nm with a photoluminescence quantum yield up to 60% was obtained by mixing the two ligands due to the formation of a narrower quantum-well width distribution. Based on such films, efficient blue PeLEDs with a maximum external quantum efficiency of 8.8% were achieved at 473 nm. Furthermore, we illustrate that the use of dual-ligand with respective tendency of forming small-n and large-n domains is a versatile strategy to achieve narrow quantum-well width distribution for photoluminescence enhancement.

Synthetic Control over Quantum Well Width Distribution and Carrier Migration in Low-Dimensional Perovskite Photovoltaics

2018 ◽  
Vol 140 (8) ◽  
pp. 2890-2896 ◽  
Author(s):  
Andrew H. Proppe ◽  
Rafael Quintero-Bermudez ◽  
Hairen Tan ◽  
Oleksandr Voznyy ◽  
Shana O. Kelley ◽  
...  
Keyword(s):  
Quantum Well ◽  
Synthetic Control ◽  
Width Distribution ◽  
Quantum Well Width ◽  
Low Dimensional

Effect of finite quantum-well width on the compressibility of a two-dimensional electron gas

1997 ◽  
Vol 55 (11) ◽  
pp. 6715-6718 ◽  
Author(s):  
I. S. Millard ◽  
N. K. Patel ◽  
C. L. Foden ◽  
E. H. Linfield ◽  
M. Y. Simmons ◽  
...  
Keyword(s):  
Quantum Well ◽  
Electron Gas ◽  
Two Dimensional ◽  
Dimensional Electron ◽  
Two Dimensional Electron Gas ◽  
Quantum Well Width ◽  
Dimensional Electron Gas

scholarly journals Quasi-dimensional models applied to kinetic and exchange energy density functionals

2021 ◽  
Vol 94 (7) ◽  
Author(s):  
Vittoria Urso ◽  
Lucian A. Constantin
Keyword(s):  
Quantum Well ◽  
Density Functional ◽  
Local Density ◽  
Three Dimensional ◽  
Energy Functional ◽  
Exchange Energy ◽  
Two Dimensional ◽  
Generalized Gradient ◽  
Quantum Well Width ◽  
Exact Exchange

AbstractWe investigate the behavior of three-dimensional 3D exchange energy functional of density-functional theory in anisotropic systems with two-dimensional 2D character and 1D character. The local density approximation (LDA), the generalized gradient approximation (GGA), and the meta-GGA behave as functions of quantum well width. We use the infinite-barrier model (IBM) for the quantum well. In the first section, we describe the problem of three-dimensional exchange functional, in the second section we introduce the quasi-2D IBM system, in the third section we introduce the quasi-1D IBM system. Using that an exact-exchange functional provides the correct approach to the true two-dimensional limit, we want to show that the 2D limit can be considered as a constraint on approximate functionals. For the 1D limit case we also propose a new functional obtained with methods completely similar to those of 2D limit.

scholarly journals Plasmonically-powered hot carrier induced modulation of light emission in a two-dimensional GaAs semiconductor quantum well

Nanoscale ◽  
2019 ◽  
Vol 11 (9) ◽  
pp. 3827-3836 ◽  
Author(s):  
Eric Ashalley ◽  
Karol Gryczynski ◽  
Zhiming Wang ◽  
Gregory Salamo ◽  
Arup Neogi
Keyword(s):  
Quantum Well ◽  
Electrostatic Interaction ◽  
Frequency Modulation ◽  
Light Emission ◽  
Two Dimensional ◽  
Hot Carrier ◽  
Semiconductor Quantum Well

Plasmonic and electrostatic interaction among the Au and Ga nanoparticles results in frequency modulation and longer lifetime of emitted light.

scholarly journals Nanometer-Thick [(FPEA)2PbX4; X=I, Br] 2D Halide Perovskite Based Thin Films for Pollutant Detection and Nonconventional Photocatalytic Degradation

2021 ◽  
Author(s):  
Arindam Mondal ◽  
Akash Lata ◽  
Aarya Prabhakaran ◽  
Satyajit Gupta
Keyword(s):  
Thin Films ◽  
Photocatalytic Degradation ◽  
Three Dimensional ◽  
Two Dimensional ◽  
Reduced Dimensionality ◽  
P Application ◽  
Halide Perovskites ◽  
Halide Perovskite ◽  
Pollutant Detection

Application of three-dimensional (3D)-halide perovskites (HaP) in photocatalysis encourages the new exercise with two-dimensional (2D) HaP based thin-films for photocatalytic degradation of dye. The reduced dimensionality to 2D-HaPs, with a...

Two-Dimensional Metal Halide Perovskites: Theory, Synthesis, and Optoelectronics

Small Methods ◽  
2017 ◽  
Vol 1 (3) ◽  
pp. 1600018 ◽  
Author(s):  
Chengxue Huo ◽  
Bo Cai ◽  
Zhao Yuan ◽  
Biwu Ma ◽  
Haibo Zeng
Keyword(s):  
Metal Halide ◽  
Two Dimensional ◽  
Halide Perovskites

scholarly journals Enhanced screening and spectral diversity in many-body elastic scattering of excitons in two-dimensional hybrid metal-halide perovskites

2019 ◽  
Vol 1 (3) ◽  
Author(s):  
Félix Thouin ◽  
Daniele Cortecchia ◽  
Annamaria Petrozza ◽  
Ajay Ram Srimath Kandada ◽  
Carlos Silva
Keyword(s):  
Elastic Scattering ◽  
Metal Halide ◽  
Two Dimensional ◽  
Many Body ◽  
Halide Perovskites

scholarly journals Strongly Anharmonic Octahedral Tilting in Two-Dimensional Hybrid Halide Perovskites

ACS Nano ◽  
2021 ◽  
Author(s):  
Matan Menahem ◽  
Zhenbang Dai ◽  
Sigalit Aharon ◽  
Rituraj Sharma ◽  
Maor Asher ◽  
...  
Keyword(s):  
Two Dimensional ◽  
Halide Perovskites ◽  
Octahedral Tilting
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