scholarly journals Relationship between the Nature of Monovalent Cations and Charge Recombination in Metal Halide Perovskites

2020 ◽  
Vol 3 (2) ◽  
pp. 1298-1304 ◽  
Author(s):  
Katelyn A. Dagnall ◽  
Benjamin J. Foley ◽  
Shelby A. Cuthriell ◽  
Matthew R. Alpert ◽  
Xiaoyu Deng ◽  
...  
Keyword(s):  
Charge Recombination ◽  
Metal Halide ◽  
Monovalent Cations ◽  
Halide Perovskites

Peculiar defects behavior in charge recombination of metal halide perovskites and conventional semiconductors

2020 ◽  
Author(s):  
Oleg Prezhdo ◽  
Jin Zhao ◽  
Chu Weibin ◽  
Wissam Al-Saidi
Keyword(s):  
Charge Recombination ◽  
Metal Halide ◽  
Halide Perovskites

Elimination of Charge Recombination Centers in Metal Halide Perovskites by Strain

2021 ◽  
Author(s):  
Lu Qiao ◽  
Wei-Hai Fang ◽  
Run Long ◽  
Oleg. V. Prezhdo
Keyword(s):  
Charge Recombination ◽  
Metal Halide ◽  
Recombination Centers ◽  
Halide Perovskites

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>

Epitaxial Metal Halide Perovskites by InkJet Printing

2019 ◽  
Author(s):  
Mykhailo Sytnyk ◽  
Ole Lytken ◽  
Tim Freund ◽  
Wolfgang Heiss ◽  
Christina Harreiss ◽  
...  
Keyword(s):  
Inkjet Printing ◽  
Metal Halide ◽  
Halide Perovskites

scholarly journals Nonempirical hybrid functionals for band gaps of inorganic metal-halide perovskites

2019 ◽  
Vol 3 (12) ◽  
Author(s):  
Thomas Bischoff ◽  
Julia Wiktor ◽  
Wei Chen ◽  
Alfredo Pasquarello
Keyword(s):  
Metal Halide ◽  
Band Gaps ◽  
Halide Perovskites ◽  
Hybrid Functionals
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