Metal halide perovskites: stability and sensing-ability

2018 ◽  
Vol 6 (38) ◽  
pp. 10121-10137 ◽  
Author(s):  
Zhaohua Zhu ◽  
Qian Sun ◽  
Zhipeng Zhang ◽  
Jie Dai ◽  
Guichuan Xing ◽  
...  
Keyword(s):  
Metal Halide ◽  
Mechanistic Studies ◽  
External Perturbations ◽  
Halide Perovskites ◽  
The Stability

We review the investigations and mechanistic studies on the stability of metal-halide perovskites under external perturbations, and highlight recent attempts to apply them as sensors.

scholarly journals Dimethylammonium iodide stabilized bismuth halide perovskite photocatalyst for hydrogen evolution

Nano Research ◽  
2020 ◽  
Author(s):  
He Zhao ◽  
Kalyani Chordiya ◽  
Petri Leukkunen ◽  
Alexey Popov ◽  
Mousumi Upadhyay Kahaly ◽  
...  
Keyword(s):  
Hydrogen Generation ◽  
Research Question ◽  
Metal Halide ◽  
Recrystallization Process ◽  
Co Catalyst ◽  
Novel Approach ◽  
Apparent Quantum Efficiency ◽  
Halide Perovskites ◽  
Halide Perovskite ◽  
The Stability

AbstractMetal halide perovskites have emerged as novel and promising photocatalysts for hydrogen generation. Currently, their stability in water is a vital and urgent research question. In this paper a novel approach to stabilize a bismuth halide perovskite [(CH3)2NH2]3[BiI6] (DA3BiI6) in water using dimethylammonium iodide (DAI) without the assistance of acids or coatings is reported. The DA3BiI6 powder exhibits good stability in DAI solutions for at least two weeks. The concentration of DAI is found as a critical parameter, where the I- ions play the key role in the stabilization. The stability of DA3BiI6 in water is realized via a surface dissolution–recrystallization process. Stabilized DA3BiI6 demonstrates constant photocatalytic properties for visible light-induced photo-oxidation of I- ions and with PtCl4 as a co-catalyst (Pt-DA3BiI6), photocatalytic H2 evolution with a rate of 5.7 μmol⋅h-1 from HI in DAI solution, obtaining an apparent quantum efficiency of 0.83% at 535 nm. This study provides new insights on the stabilization of metal halide perovskites for photocatalysis in aqueous solution.

Advancements in the stability of perovskite solar cells: degradation mechanisms and improvement approaches

RSC Advances ◽  
2016 ◽  
Vol 6 (44) ◽  
pp. 38079-38091 ◽  
Author(s):  
Bobo Li ◽  
Yafang Li ◽  
Chaoyue Zheng ◽  
Deqing Gao ◽  
Wei Huang
Keyword(s):  
Solar Cells ◽  
Perovskite Solar Cells ◽  
Metal Halide ◽  
Organic Metal ◽  
Degradation Mechanisms ◽  
Photoactive Materials ◽  
Halide Perovskites ◽  
The Stability

Recently, organic metal halide perovskites have emerged as one of the most promising photoactive materials in the field of photovoltaics.

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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