scholarly journals Local Energy Landscape Drives Long-Range Exciton Diffusion in Two-Dimensional Halide Perovskite Semiconductors

2021 ◽  
Vol 12 (16) ◽  
pp. 4003-4011
Author(s):  
Alan Baldwin ◽  
Géraud Delport ◽  
Kai Leng ◽  
Rosemonde Chahbazian ◽  
Krzysztof Galkowski ◽  
...  
Keyword(s):  
Long Range ◽  
Energy Landscape ◽  
Local Energy ◽  
Two Dimensional ◽  
Exciton Diffusion ◽  
Halide Perovskite

scholarly journals Long-Range Exciton Diffusion in Two-Dimensional Assemblies of Cesium Lead Bromide Perovskite Nanocrystals

ACS Nano ◽  
2020 ◽  
Vol 14 (6) ◽  
pp. 6999-7007 ◽  
Author(s):  
Erika Penzo ◽  
Anna Loiudice ◽  
Edward S. Barnard ◽  
Nicholas J. Borys ◽  
Matthew J. Jurow ◽  
...  
Keyword(s):  
Long Range ◽  
Two Dimensional ◽  
Perovskite Nanocrystals ◽  
Exciton Diffusion ◽  
Lead Bromide

scholarly journals Phonon scattering and exciton localization: molding exciton flux in two dimensional disorder energy landscape

eLight ◽  
2021 ◽  
Vol 1 (1) ◽  
Author(s):  
Pengfei Qi ◽  
Yang Luo ◽  
Beibei Shi ◽  
Wei Li ◽  
Donglin Liu ◽  
...  
Keyword(s):  
Thermal Management ◽  
Carrier Mobility ◽  
Diffusion Length ◽  
Phonon Scattering ◽  
Energy Landscape ◽  
Effective Diffusion ◽  
Two Dimensional ◽  
Exciton Localization ◽  
Exciton Diffusion ◽  
Ultrafast Relaxation

AbstractTwo dimensional excitonic devices are of great potential to overcome the dilemma of response time and integration in current generation of electron or/and photon based systems. The ultrashort diffusion length of exciton arising from ultrafast relaxation and low carrier mobility greatly discounts the performance of excitonic devices. Phonon scattering and exciton localization are crucial to understand the modulation of exciton flux in two dimensional disorder energy landscape, which still remain elusive. Here, we report an optimized scheme for exciton diffusion and relaxation dominated by phonon scattering and disorder potentials in WSe2 monolayers. The effective diffusion coefficient is enhanced by > 200% at 280 K. The excitons tend to be localized by disorder potentials accompanied by the steadily weakening of phonon scattering when temperature drops to 260 K, and the onset of exciton localization brings forward as decreasing temperature. These findings identify that phonon scattering and disorder potentials are of great importance for long-range exciton diffusion and thermal management in exciton based systems, and lay a firm foundation for the development of functional excitonic devices.

scholarly journals Two-dimensional or passivation treatment: the effect of Hexylammonium post deposition treatment on 3D halide perovskite-based solar cells

2021 ◽  
Author(s):  
Stav Rahmany ◽  
Lioz Etgar
Keyword(s):  
Solar Cells ◽  
Power Conversion Efficiency ◽  
Conversion Efficiency ◽  
Power Conversion ◽  
Perovskite Solar Cells ◽  
Two Dimensional ◽  
Theoretical Limit ◽  
Halide Perovskite ◽  
Passivation Treatment ◽  
Post Deposition

Much effort has been made to push the power conversion efficiency of perovskite solar cells (PSCs) towards the theoretical limit. Recent studies have shown that post deposition treatment of barrier...

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...

scholarly journals Minimizing energy loss in two-dimensional tin halide perovskite solar cells—A perspective

APL Materials ◽  
2021 ◽  
Vol 9 (2) ◽  
pp. 020906
Author(s):  
Tao Zhang ◽  
Qiang Sun ◽  
Xiaoli Zhang ◽  
Yan Shen ◽  
Mingkui Wang
Keyword(s):  
Solar Cells ◽  
Energy Loss ◽  
Perovskite Solar Cells ◽  
Two Dimensional ◽  
Halide Perovskite

scholarly journals Recovery of long-range order in two-dimensional charge density waves at high temperatures

2021 ◽  
Vol 27 (S1) ◽  
pp. 952-954
Author(s):  
Suk Hyun Sung ◽  
Yin Min Goh ◽  
Noah Schnitzer ◽  
Ismail El Baggari ◽  
Kai Sun ◽  
...  
Keyword(s):  
Charge Density ◽  
Long Range ◽  
High Temperatures ◽  
Charge Density Waves ◽  
Range Order ◽  
Long Range Order ◽  
Two Dimensional ◽  
Density Waves
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