Long-lived polarization memory in the electronic states of halide perovskites (Conference Presentation)

2018 ◽  
Author(s):  
Dan Credgington
Keyword(s):  
Electronic States ◽  
Halide Perovskites

scholarly journals Long-lived polarization memory in the electronic states of lead-halide perovskites from local structural dynamics

2018 ◽  
Vol 9 (1) ◽  
Author(s):  
Jasmine P. H. Rivett ◽  
Liang Z. Tan ◽  
Michael B. Price ◽  
Sean A. Bourelle ◽  
Nathaniel J. L. K. Davis ◽  
...  
Keyword(s):  
Structural Dynamics ◽  
Electronic States ◽  
Halide Perovskites ◽  
Lead Halide

Optical characterizations of the surface states in hybrid lead–halide perovskites

2016 ◽  
Vol 18 (18) ◽  
pp. 12626-12632 ◽  
Author(s):  
Weiguang Kong ◽  
Tao Ding ◽  
Gang Bi ◽  
Huizhen Wu
Keyword(s):  
Electronic States ◽  
Surface States ◽  
Deep Trap ◽  
Dangling Bonds ◽  
Carrier Lifetimes ◽  
Halide Perovskites ◽  
And Diffusion ◽  
Lead Halide

It is demonstrated that the optical dynamics in MAPbI3 is primarily determined by the surface states. Pb dangling bonds in MAPbI3 introduce shallow electronic states, whereas rich-iodine surface of MAPbI3 induces deep trap centers for carriers which are detrimental to carrier lifetimes and diffusion lengths.

Electronic States Modulation by Coherent Optical Phonons in 2D Halide Perovskites

2021 ◽  
Vol 33 (11) ◽  
pp. 2006233
Author(s):  
Jianhui Fu ◽  
Mingjie Li ◽  
Ankur Solanki ◽  
Qiang Xu ◽  
Yulia Lekina ◽  
...  
Keyword(s):  
Electronic States ◽  
Optical Phonons ◽  
Halide Perovskites

Integration of Core-Edge Spectroscopy Methods for the Study of Polymers

1996 ◽  
Vol 54 ◽  
pp. 154-155
Author(s):  
E. G. Rightor
Keyword(s):  
Excited State ◽  
Polymer Blends ◽  
Gas Phase ◽  
Spatial Resolution ◽  
High Spatial Resolution ◽  
Electronic States ◽  
Core Electron ◽  
Bulk Solids ◽  
Development Application

Core edge spectroscopy methods are versatile tools for investigating a wide variety of materials. They can be used to probe the electronic states of materials in bulk solids, on surfaces, or in the gas phase. This family of methods involves promoting an inner shell (core) electron to an excited state and recording either the primary excitation or secondary decay of the excited state. The techniques are complimentary and have different strengths and limitations for studying challenging aspects of materials. The need to identify components in polymers or polymer blends at high spatial resolution has driven development, application, and integration of results from several of these methods.

Electronic States near the Fermi Level in the Antiferromagnetic and Ferromagnetic Spinels of Zn 1− x Cu x Cr 2 Se 4 ; 0.0 ≤ x ≤ 1.0

2002 ◽  
Vol 75 (4-5) ◽  
pp. 359-371
Author(s):  
M. Hidaka ◽  
N. Tokiwa ◽  
M. Yoshimura ◽  
H. Fujii ◽  
Jae-Young Choi ◽  
...  
Keyword(s):  
Fermi Level ◽  
Electronic States

Electronic states of the Cs+ ion

1997 ◽  
Vol 94 ◽  
pp. 1794-1801 ◽  
Author(s):  
C Destandau ◽  
G Chambaud ◽  
P Rosmus
Keyword(s):  
Electronic States

THERMAL TRANSPORT BEHAVIORS IN LEAD HALIDE PEROVSKITES

2018 ◽  
Author(s):  
Wee-Liat Ong ◽  
Giselle Elbaz ◽  
Evan A. Doud ◽  
Philip Kim ◽  
Daniel Paley ◽  
...  
Keyword(s):  
Thermal Transport ◽  
Halide Perovskites ◽  
Lead Halide

Lead-Free Metal Halide Perovskite Nanocrystals for Photocatalysis in Water

2019 ◽  
Author(s):  
Subhajit Bhattacharjee ◽  
Sonu Pratap Chaudhary ◽  
Sayan Bhattacharyya
Keyword(s):  
Charge Carrier ◽  
Wide Spectrum ◽  
Real Life ◽  
Metal Halide ◽  
Lead Free ◽  
Water Medium ◽  
Type I ◽  
Type Ii ◽  
Perovskite Layer ◽  
Halide Perovskites

<p>Metal halide perovskites with high absorption coefficient, direct generation of free charge carriers, excellent ambipolar charge carrier transport properties, point-defect tolerance, compositional versatility and solution processability are potentially transforming the photovoltaics and optoelectronics industries. However their limited ambient stability, particularly those of iodide perovskites, obscures their use as photocatalysts especially in aqueous medium. In an unprecedented approach we have exploited the photo-absorption property of the less toxic lead-free Cs<sub>3</sub>Bi<sub>2</sub>X<sub>9 </sub>(X = Br, I) nanocrystals (NCs) to catalyse the degradation of water pollutant organic dye, methylene blue (MB) in presence of visible light at room temperature. After providing a proof-of-concept with bromide perovskites in isopropanol, the perovskites are employed as photocatalysts in water medium by designing perovskite/Ag<sub>2</sub>S and perovskite/TiO<sub>2 </sub>composite systems, with Type I (or quasi Type II) and Type II alignments, respectively. Ag<sub>2</sub>S and TiO<sub>2</sub> coatings decelerate penetration of water into the perovskite layer while facilitating charge carrier extraction. With a minimal NC loading, Cs<sub>3</sub>Bi<sub>2</sub>I<sub>9</sub>/Ag<sub>2</sub>S degrades ~90% MB within an hour. Our approach has the potential to unravel the photocatalytic properties of metal halide perovskites for a wide spectrum of real-life applications. </p>

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