scholarly journals Semiconductor to metallic transition under induced pressure in Cs2AgBiBr6 double halide perovskite: a theoretical DFT study for photovoltaic and optoelectronic applications

RSC Advances ◽  
2021 ◽  
Vol 11 (39) ◽  
pp. 24001-24012
Author(s):  
Md. Nurul Islam ◽  
Jiban Podder ◽  
Tusar Saha ◽  
Protima Rani
Keyword(s):  
Low Cost ◽  
Optoelectronic Devices ◽  
Dft Study ◽  
Wide Range ◽  
Halide Perovskites ◽  
Halide Perovskite ◽  
Optoelectronic Applications

Inorganic double halide perovskites have a wide range of applications in low-cost photovoltaic and optoelectronic devices.

scholarly journals Chelating Agent: The Health Protector of Researchers in Lead Halide Perovskite Laboratory

2020 ◽  
Author(s):  
Yu-Hao Deng
Keyword(s):  
Low Cost ◽  
Health Hazard ◽  
Optoelectronic Devices ◽  
Chelating Agent ◽  
The Body ◽  
Lead Ions ◽  
Laboratory Safety ◽  
Halide Perovskites ◽  
Halide Perovskite ◽  
Lead Halide

<p>Lead halide perovskites have achieved substantial success in various optoelectronic devices owing to their remarkable physical properties. However, lead (Pb) as a heavy metal, long-lasting toxic to the body has become a health hazard for researchers. How to completely remove the residual lead in the laboratory and prevent lead from entering the human body have always been an important topic in laboratory safety. Here we develop an operable method to treat lead sources with low-cost and eco-friendly chelating agent (EDTA-2Na), which can reduce the concentration of free lead ions to 10<sup>-11 </sup>ppm theoretically. Moreover, experiments have demonstrated that the chelating agent possess a strong ability on the removal of lead ions from the lab surface, gloves and lab coats. This approach paves the way to protect the health of researchers in lead halide perovskite laboratory. </p>

scholarly journals Chelating Agent: The Health Protector of Researchers in Lead Halide Perovskite Laboratory

2020 ◽  
Author(s):  
Yu-Hao Deng
Keyword(s):  
Low Cost ◽  
Health Hazard ◽  
Optoelectronic Devices ◽  
Chelating Agent ◽  
The Body ◽  
Lead Ions ◽  
Laboratory Safety ◽  
Halide Perovskites ◽  
Halide Perovskite ◽  
Lead Halide

<p>Lead halide perovskites have achieved substantial success in various optoelectronic devices owing to their remarkable physical properties. However, lead (Pb) as a heavy metal, long-lasting toxic to the body has become a health hazard for researchers. How to completely remove the residual lead in the laboratory and prevent lead from entering the human body have always been an important topic in laboratory safety. Here we develop an operable method to treat lead sources with low-cost and eco-friendly chelating agent (EDTA-2Na), which can reduce the concentration of free lead ions to 10<sup>-11 </sup>ppm theoretically. Moreover, experiments have demonstrated that the chelating agent possess a strong ability on the removal of lead ions from the lab surface, gloves and lab coats. This approach paves the way to protect the health of researchers in lead halide perovskite laboratory. </p>

scholarly journals Chelating Agent: The Health Protector of Researchers in Lead Halide Perovskite Laboratory

2020 ◽  
Author(s):  
Yu-Hao Deng
Keyword(s):  
Low Cost ◽  
Health Hazard ◽  
Optoelectronic Devices ◽  
Chelating Agent ◽  
The Body ◽  
Lead Ions ◽  
Laboratory Safety ◽  
Halide Perovskites ◽  
Halide Perovskite ◽  
Lead Halide

<p>Lead halide perovskites have achieved substantial success in various optoelectronic devices owing to their remarkable physical properties. However, lead (Pb) as a heavy metal, long-lasting toxic to the body has become a health hazard for researchers. How to completely remove the residual lead in the laboratory and prevent lead from entering the human body have always been an important topic in laboratory safety. Here we develop an operable method to treat lead sources with low-cost and eco-friendly chelating agent (EDTA-2Na), which can reduce the concentration of free lead ions to 10<sup>-11 </sup>ppm theoretically. Moreover, experiments have demonstrated that the chelating agent possess a strong ability on the removal of lead ions from the lab surface, gloves and lab coats. This approach paves the way to protect the health of researchers in lead halide perovskite laboratory. </p>

scholarly journals Ultrasensitive and ultrathin phototransistors and photonic synapses using perovskite quantum dots grown from graphene lattice

2020 ◽  
Vol 6 (7) ◽  
pp. eaay5225 ◽  
Author(s):  
Basudev Pradhan ◽  
Sonali Das ◽  
Jinxin Li ◽  
Farzana Chowdhury ◽  
Jayesh Cherusseri ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Optoelectronic Devices ◽  
Generation Efficiency ◽  
Charge Generation ◽  
Graphene Lattice ◽  
New Directions ◽  
Perovskite Quantum Dots ◽  
Efficient Charge ◽  
Halide Perovskite ◽  
Optoelectronic Applications

Organic-inorganic halide perovskite quantum dots (PQDs) constitute an attractive class of materials for many optoelectronic applications. However, their charge transport properties are inferior to materials like graphene. On the other hand, the charge generation efficiency of graphene is too low to be used in many optoelectronic applications. Here, we demonstrate the development of ultrathin phototransistors and photonic synapses using a graphene-PQD (G-PQD) superstructure prepared by growing PQDs directly from a graphene lattice. We show that the G-PQDs superstructure synchronizes efficient charge generation and transport on a single platform. G-PQD phototransistors exhibit excellent responsivity of 1.4 × 108 AW–1 and specific detectivity of 4.72 × 1015 Jones at 430 nm. Moreover, the light-assisted memory effect of these superstructures enables photonic synaptic behavior, where neuromorphic computing is demonstrated by facial recognition with the assistance of machine learning. We anticipate that the G-PQD superstructures will bolster new directions in the development of highly efficient optoelectronic devices.

scholarly journals It's a trap! On the nature of localised states and charge trapping in lead halide perovskites

2020 ◽  
Vol 7 (2) ◽  
pp. 397-410 ◽  
Author(s):  
Handong Jin ◽  
Elke Debroye ◽  
Masoumeh Keshavarz ◽  
Ivan G. Scheblykin ◽  
Maarten B. J. Roeffaers ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Materials Science ◽  
Optoelectronic Devices ◽  
Charge Trapping ◽  
Scientific Interest ◽  
Halide Perovskites ◽  
Localised States ◽  
Halide Perovskite ◽  
Lead Halide

The recent surge of scientific interest for lead halide perovskite semiconductors and optoelectronic devices has seen a mix of materials science sub-fields converge on the same “magical” crystal structure.

Performance and Stability Improvements in Metal Halide Perovskite with Intralayer Incorporation of Organic Additives

2021 ◽  
Author(s):  
Yanan Li ◽  
Matthew Dailey ◽  
Patrick Lohr ◽  
Adam Printz
Keyword(s):  
Thin Film ◽  
Thin Film Transistors ◽  
Metal Halide ◽  
Organic Additives ◽  
Semiconducting Materials ◽  
Light Emitting ◽  
Metal Halide Perovskite ◽  
Wide Range ◽  
Halide Perovskites ◽  
Halide Perovskite

Metal halide perovskites are emerging semiconducting materials with a wide range of applications, including photovoltaics, thin-film transistors, and light-emitting diodes. A key advantage of perovskites over more established semiconductor technologies...

scholarly journals Recent Developments in Lead and Lead-Free Halide Perovskite Nanostructures towards Photocatalytic CO2 Reduction

Nanomaterials ◽  
2020 ◽  
Vol 10 (12) ◽  
pp. 2569
Author(s):  
Chaitanya B. Hiragond ◽  
Niket S. Powar ◽  
Su-Il In
Keyword(s):  
High Performance ◽  
High Surface ◽  
Co2 Reduction ◽  
Value Added ◽  
Wide Range ◽  
Recent Developments ◽  
Metal Organic ◽  
Halide Perovskites ◽  
Halide Perovskite ◽  
Crystallographic Defects

Perovskite materials have been widely considered as emerging photocatalysts for CO2 reduction due to their extraordinary physicochemical and optical properties. Perovskites offer a wide range of benefits compared to conventional semiconductors, including tunable bandgap, high surface energy, high charge carrier lifetime, and flexible crystal structure, making them ideal for high-performance photocatalytic CO2 reduction. Notably, defect-induced perovskites, for example, crystallographic defects in perovskites, have given excellent opportunities to tune perovskites’ catalytic properties. Recently, lead (Pb) halide perovskite and their composites or heterojunction with other semiconductors, metal nanoparticles (NPs), metal complexes, graphene, and metal-organic frameworks (MOFs) have been well established for CO2 conversion. Besides, various halide perovskites have come under focus to avoid the toxicity of lead-based materials. Therefore, we reviewed the recent progress made by Pb and Pb-free halide perovskites in photo-assisted CO2 reduction into useful chemicals. We also discussed the importance of various factors like change in solvent, structure defects, and compositions in the fabrication of halide perovskites to efficiently convert CO2 into value-added products.

Towards Superior X-ray Detection Performance of Two-dimensional Halide Perovskite Crystals by Adjusting Anisotropic Transport Behavior

2021 ◽  
Author(s):  
Bao Xiao ◽  
Qihao Sun ◽  
Fangbao Wang ◽  
Shiyao Wang ◽  
Binbin Zhang ◽  
...  
Keyword(s):  
Three Dimensional ◽  
Detection Performance ◽  
Two Dimensional ◽  
Inorganic Hybrid ◽  
X Ray ◽  
Transport Behavior ◽  
Halide Perovskites ◽  
Anisotropic Transport ◽  
Halide Perovskite ◽  
Optoelectronic Applications

Two-dimensional (2D) organic-inorganic hybrid halide perovskites have recently attracted extensive attention for electronic and optoelectronic applications due to their tunable properties and superior stability compared with their three-dimensional (3D) counterparts....

Ionic behavior of organic–inorganic metal halide perovskite based metal-oxide-semiconductor capacitors

2017 ◽  
Vol 19 (20) ◽  
pp. 13002-13009 ◽  
Author(s):  
Yucheng Wang ◽  
Yuming Zhang ◽  
Tiqiang Pang ◽  
Jie Xu ◽  
Ziyang Hu ◽  
...  
Keyword(s):  
Metal Oxide ◽  
Metal Oxide Semiconductor ◽  
Metal Halide ◽  
Oxide Semiconductor ◽  
Metal Halide Perovskite ◽  
Halide Perovskites ◽  
Halide Perovskite ◽  
Optoelectronic Applications

Organic–inorganic metal halide perovskites are promising semiconductors for optoelectronic applications.

scholarly journals Highly efficient photoelectric effect in halide perovskites for regenerative electron sources

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Fangze Liu ◽  
Siraj Sidhik ◽  
Mark A. Hoffbauer ◽  
Sina Lewis ◽  
Amanda J. Neukirch ◽  
...  
Keyword(s):  
Electron Emission ◽  
State Of The Art ◽  
Low Cost ◽  
Photoelectric Effect ◽  
Ultraviolet Spectrum ◽  
Night Vision ◽  
Maximum Efficiency ◽  
Electron Sources ◽  
Wide Range ◽  
Halide Perovskites

AbstractElectron sources are a critical component in a wide range of applications such as electron-beam accelerator facilities, photomultipliers, and image intensifiers for night vision. We report efficient, regenerative and low-cost electron sources based on solution-processed halide perovskites thin films when they are excited with light with energy equal to or above their bandgap. We measure a quantum efficiency up to 2.2% and a lifetime of more than 25 h. Importantly, even after degradation, the electron emission can be completely regenerated to its maximum efficiency by deposition of a monolayer of Cs. The electron emission from halide perovskites can be tuned over the visible and ultraviolet spectrum, and operates at vacuum levels with pressures at least two-orders higher than in state-of-the-art semiconductor electron sources.

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