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.

scholarly journals Tailoring the electron and hole dimensionality to achieve efficient and stable metal halide perovskite scintillators

Nanophotonics ◽  
2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Zhifang Tan ◽  
Jincong Pang ◽  
Guangda Niu ◽  
Jun-Hui Yuan ◽  
Kan-Hao Xue ◽  
...  
Keyword(s):  
Water Solubility ◽  
Radiation Stability ◽  
Metal Halide ◽  
Lead Free ◽  
X Ray ◽  
Metal Halide Perovskite ◽  
Bonding Interaction ◽  
Halide Perovskites ◽  
Halide Perovskite ◽  
Low X

Abstract Metal halide perovskites have recently been reported as excellent scintillators for X-ray detection. However, perovskite based scintillators are susceptible to moisture and oxygen atmosphere, such as the water solubility of CsPbBr3, and oxidation vulnerability of Sn2+, Cu+. The traditional metal halide scintillators (NaI: Tl, LaBr3, etc.) are also severely restricted by their high hygroscopicity. Here we report a new kind of lead free perovskite with excellent water and radiation stability, Rb2Sn1-x Te x Cl6. The equivalent doping of Te could break the in-phase bonding interaction between neighboring octahedra in Rb2SnCl6, and thus decrease the electron and hole dimensionality. The optimized Te content of 5% resulted in high photoluminescence quantum yield of 92.4%, and low X-ray detection limit of 0.7 µGyair s−1. The photoluminescence and radioluminescence could be maintained without any loss when immersing in water or after 480,000 Gy radiations, outperforming previous perovskite and traditional metal halides scintillators.

Recent developments in fabrication and performance of metal halide perovskite field-effect transistors

2020 ◽  
Vol 8 (47) ◽  
pp. 16691-16715
Author(s):  
Yu Liu ◽  
Ping-An Chen ◽  
Yuanyuan Hu
Keyword(s):  
Field Effect ◽  
Field Effect Transistors ◽  
Metal Halide ◽  
Device Performance ◽  
Metal Halide Perovskite ◽  
Recent Developments ◽  
Halide Perovskites ◽  
Halide Perovskite ◽  
And Performance

Recent developments in fabrication strategies and device performance of field-effect transistors based on metal halide perovskites are reviewed.

scholarly journals Comment on “ferroelectricity-free lead halide perovskites” by A. Gómez, Q. Wang, A. R. Goñi, M. Campoy-Quiles and A. Abate, Energy Environ. Sci., 2019, 12, 2537

2020 ◽  
Vol 13 (6) ◽  
pp. 1888-1891
Author(s):  
Alexander Colsmann ◽  
Tobias Leonhard ◽  
Alexander D. Schulz ◽  
Holger Röhm
Keyword(s):  
Thin Films ◽  
Metal Halide ◽  
Organic Metal ◽  
Metal Halide Perovskite ◽  
Halide Perovskites ◽  
Halide Perovskite ◽  
Lead Halide ◽  
Energy Environ

This comment analyzes pitfalls when investigating piezoresponse and ferroelectricity in organic-metal halide perovskite thin films.

Organo metal halide perovskites effectively photosensitize the production of singlet oxygen (1Δg)

2019 ◽  
Vol 55 (87) ◽  
pp. 13100-13103 ◽  
Author(s):  
Xian-Fu Zhang ◽  
Baomin Xu
Keyword(s):  
Quantum Dots ◽  
Quantum Yield ◽  
Singlet Oxygen ◽  
Metal Halide ◽  
Metal Halide Perovskite ◽  
Perovskite Quantum Dots ◽  
Halide Perovskites ◽  
Halide Perovskite

Metal halide perovskite quantum dots effectively generate singlet oxygen with a quantum yield of 0.34, the highest among nano semiconductor/nano metal photosensitizers.

Improving the Stability of Metal Halide Perovskite Materials and Light-Emitting Diodes

2018 ◽  
Vol 30 (42) ◽  
pp. 1704587 ◽  
Author(s):  
Himchan Cho ◽  
Young-Hoon Kim ◽  
Christoph Wolf ◽  
Hyeon-Dong Lee ◽  
Tae-Woo Lee
Keyword(s):  
Light Emitting Diodes ◽  
Metal Halide ◽  
Light Emitting ◽  
Perovskite Materials ◽  
Metal Halide Perovskite ◽  
Halide Perovskite ◽  
The Stability

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 A Review on Lead-Free Hybrid Halide Perovskites as Light Absorbers for Photovoltaic Applications Based on Their Structural, Optical, and Morphological Properties

Molecules ◽  
2020 ◽  
Vol 25 (21) ◽  
pp. 5039
Author(s):  
Shadrack J. Adjogri ◽  
Edson L. Meyer
Keyword(s):  
Perovskite Solar Cells ◽  
Lead Free ◽  
Morphological Properties ◽  
Chemical Compositions ◽  
Hybrid Perovskite ◽  
Photovoltaic Applications ◽  
Halide Perovskites ◽  
Halide Perovskite ◽  
The Stability ◽  
Light Absorbers

Despite the advancement made by the scientific community in the evolving photovoltaic technologies, including the achievement of a 29.1% power conversion efficiency of perovskite solar cells over the past two decades, there are still numerous challenges facing the advancement of lead-based halide perovskite absorbers for perovskite photovoltaic applications. Among the numerous challenges, the major concern is centered around the toxicity of the emerging lead-based halide perovskite absorbers, thereby leading to drawbacks for their pragmatic application and commercialization. Hence, the replacement of lead in the perovskite material with non-hazardous metal has become the central focus for the actualization of hybrid perovskite technology. This review focuses on lead-free hybrid halide perovskites as light absorbers with emphasis on how their chemical compositions influence optical properties, morphological properties, and to a certain extent, the stability of these perovskite materials.

Understanding the effect of light and temperature on the optical properties and stability of mixed-ion halide perovskites

2020 ◽  
Vol 8 (28) ◽  
pp. 9714-9723
Author(s):  
Sarah Wieghold ◽  
Alexander S. Bieber ◽  
Masoud Mardani ◽  
Theo Siegrist ◽  
Lea Nienhaus
Keyword(s):  
Optical Properties ◽  
Solar Cells ◽  
Operation Conditions ◽  
Halide Perovskites ◽  
Halide Perovskite ◽  
The Stability ◽  
Effect Of Light

The stability of organic–inorganic halide perovskite films plays an important role for their successful incorporation as absorber materials in solar cells under realistic operation conditions.

Metal halide perovskites for resistive switching memory devices and artificial synapses

2019 ◽  
Vol 7 (25) ◽  
pp. 7476-7493 ◽  
Author(s):  
Bixin Li ◽  
Wei Hui ◽  
Xueqin Ran ◽  
Yingdong Xia ◽  
Fei Xia ◽  
...  
Keyword(s):  
Resistive Switching ◽  
Metal Halide ◽  
Memory Devices ◽  
Resistive Switching Memory ◽  
Metal Halide Perovskite ◽  
Recent Developments ◽  
Halide Perovskites ◽  
Halide Perovskite ◽  
Switching Memory

This article highlights recent developments of emerging metal halide perovskite based resistive switching memory devices and artificial synapses.

Fabrication of Highly Stable Fully-Inorganic Halide Perovskite Films for Optoelectronic Application

2020 ◽  
Vol 20 (12) ◽  
pp. 7724-7729
Author(s):  
Jung Hyeon Yoo ◽  
Seong Guk Jeong ◽  
Hyun Bin Kim ◽  
Seung Hee Choi ◽  
Seok Bin Kwon ◽  
...  
Keyword(s):  
Critical Issue ◽  
White Leds ◽  
Optoelectronic Application ◽  
Stable Cesium ◽  
Optical Adhesive ◽  
Improved Stability ◽  
Stability Issue ◽  
Halide Perovskites ◽  
Halide Perovskite ◽  
The Stability

Despite the fact that stability is a critical issue affecting halide perovskite after the materials have been developed, these materials continue to be studied due to their outstanding optoelectronic characteristics such as narrow emission band width, high PLQY. Many methods are suggested and improved, but the limitations for the display and lighting applications are still remaining. Here, we propose the fabrication of stable cesium lead tri-halide (CsPbX3; X= Cl, Br, I) perovskite films using photocurable polyurethane material, norland optical adhesive 63 (NOA 63), to generate white LEDs by placing films on the InGaN 450 nm blue chip. Comparing with the conventional perovskites, fabricated films well maintained the luminescence properties such as full widths at half maximum (FWHM) of 18 nm and 31 nm for green and red films, respectively. For the stability issue, pristine perovskite without encapsulation is decomposed immediately at high humidity and temperature, but NOA 63 encapsulated perovskite maintained a PL emission property of 60% after four hours in artificial atmosphere. The CIE color triangle reached ~119% of the NTSC standard, exhibiting high color purity. From the results, we confirm that the NOA 63 encapsulated halide perovskites are beneficial when applied in optoelectronic applications due to their improved stability and maintained characteristics.

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