scholarly journals Atomic structure of metal-halide perovskites from first principles: The chicken-and-egg paradox of the organic-inorganic interaction

2016 ◽  
Vol 94 (4) ◽  
Author(s):  
Jingrui Li ◽  
Patrick Rinke
Keyword(s):  
Atomic Structure ◽  
First Principles ◽  
Metal Halide ◽  
Structure Of Metal ◽  
Halide Perovskites

scholarly journals A first-principles prediction on the “healing effect” of graphene preventing carrier trapping near the surface of metal halide perovskites

2018 ◽  
Vol 9 (13) ◽  
pp. 3341-3353 ◽  
Author(s):  
W.-W. Wang ◽  
J.-S. Dang ◽  
R. Jono ◽  
H. Segawa ◽  
M. Sugimoto
Keyword(s):  
First Principles ◽  
Metal Halide ◽  
Carrier Trapping ◽  
Healing Effect ◽  
Halide Perovskites

We introduce a healing effect of graphene preventing carrier trapping by the defects near the surface of metal 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
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