scholarly journals Scaling Laws of Exciton Recombination Kinetics in Low Dimensional Halide Perovskite Nanostructures

2020 ◽  
Vol 142 (19) ◽  
pp. 8871-8879
Author(s):  
Mengyu Gao ◽  
Hao Liu ◽  
Sunmoon Yu ◽  
Sheena Louisia ◽  
Ye Zhang ◽  
...  
Keyword(s):  
Scaling Laws ◽  
Exciton Recombination ◽  
Halide Perovskite ◽  
Low Dimensional ◽  
Recombination Kinetics

Low‐Dimensional Metal Halide Perovskite Photodetectors

2020 ◽  
pp. 2003309
Author(s):  
Hsin‐Ping Wang ◽  
Siyuan Li ◽  
Xinya Liu ◽  
Zhifeng Shi ◽  
Xiaosheng Fang ◽  
...  
Keyword(s):  
Metal Halide ◽  
Metal Halide Perovskite ◽  
Halide Perovskite ◽  
Low Dimensional

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.

Bioinspired Graphene Nanogut

2013 ◽  
Vol 80 (6) ◽  
Author(s):  
Zhao Qin ◽  
Markus J. Buehler
Keyword(s):  
Carbon Nanotubes ◽  
Drug Delivery ◽  
Carbon Nanotube ◽  
Biological System ◽  
Scaling Laws ◽  
Functional Materials ◽  
Cross Sectional ◽  
Mismatch Strain ◽  
Damage Repair ◽  
Low Dimensional

Low-dimensional nanomaterials are attractive for various applications, including damage repair, drug delivery, and bioimaging. The ability to control the morphology of nanomaterials is critical for manufacturing as well as for utilizing them as functional materials or devices. However, the manipulation of such materials remains challenging, and effective methods to control their morphology remain limited. Here, we propose to mimic a macroscopic biological system—the gut—as a means to control the nanoscale morphology by exploiting the concept of mismatch strain. We show that, by mimicking the development of the gut, one can obtain a controlled wavy shape of a combined carbon nanotube and graphene system. We show that the scaling laws that control the formation of the gut at the macroscale are suitable for ultrasmall-diameter carbon nanotubes with a diameter smaller than 7 Å but do not account for the morphology of systems with larger diameter nanotubes. We find that the deviation is caused by cross-sectional buckling of carbon nanotube, where this behavior relates to the different constitutive laws for carbon nanotube and graphene in contrast to the macroscale biological system. Our study illustrates the possibility of downscaling macroscale phenomena to the nanoscale using continuum mechanics theory, with wide-ranging applications in nanotechnology.

scholarly journals Photophysics of size‐selected InP nanocrystals: Exciton recombination kinetics

1996 ◽  
Vol 105 (18) ◽  
pp. 7957-7963 ◽  
Author(s):  
S.‐H. Kim ◽  
R. H. Wolters ◽  
J. R. Heath
Keyword(s):  
Exciton Recombination ◽  
Recombination Kinetics

Discerning the Surface and Bulk Recombination Kinetics of Organic-Inorganic Halide Perovskite Single Crystals

2016 ◽  
Vol 6 (14) ◽  
pp. 1600551 ◽  
Author(s):  
Bo Wu ◽  
Huy Tiep Nguyen ◽  
Zhiliang Ku ◽  
Guifang Han ◽  
David Giovanni ◽  
...  
Keyword(s):  
Single Crystals ◽  
Halide Perovskite ◽  
Kinetics Of ◽  
Recombination Kinetics

scholarly journals High charge carrier mobility in solution processed one-dimensional lead halide perovskite single crystals and their application as photodetectors

Nanoscale ◽  
2020 ◽  
Vol 12 (17) ◽  
pp. 9688-9695 ◽  
Author(s):  
Tianjun Liu ◽  
Weidong Tang ◽  
Sally Luong ◽  
Oliver Fenwick
Keyword(s):  
Carrier Mobility ◽  
Charge Carrier Mobility ◽  
Large Space ◽  
Hopping Transport ◽  
One Dimensional ◽  
Limited Mobility ◽  
Halide Perovskite ◽  
Low Dimensional ◽  
High Charge Carrier Mobility ◽  
Lead Halide

Large space-charge limited mobility and a fast optical response is reported in low dimensional halide perovskite crystals. A transition between hopping transport and band-like transport is observed at 200 K.

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