A5040466949- Perovskite Materials and Applications
- Quantum Dots Synthesis And Properties
- Solid-state spectroscopy and crystallography
- Supercapacitor Materials and Fabrication
- Electrocatalysts for Energy Conversion
- Luminescence Properties of Advanced Materials
- Advancements in Battery Materials
- Chalcogenide Semiconductor Thin Films
- Nanoporous metals and alloys
- 2D Materials and Applications
- Luminescence and Fluorescent Materials
- Electrochemical Analysis and Applications
- Advanced battery technologies research
- Analytical chemistry methods development
- Gold and Silver Nanoparticles Synthesis and Applications
- Pesticide Residue Analysis and Safety
- Advanced biosensing and bioanalysis techniques
- Mass Spectrometry Techniques and Applications
- Radiation Detection and Scintillator Technologies
- Polyoxometalates: Synthesis and Applications
- Nanomaterials and Printing Technologies
- Entomopathogenic Microorganisms in Pest Control
- Thin-Film Transistor Technologies
- Advanced Photocatalysis Techniques
- Surface Modification and Superhydrophobicity
University of Cambridge
2019-2024
Italian Institute of Technology
2016-2021
Istituto Nazionale di Fisica Nucleare, Sezione di Genova
2016-2020
University of Genoa
2016-2017
Imam Hossein University
2012-2015
University of Tehran
2014
Faculty (United Kingdom)
2014
Ahvaz Jundishapur University of Medical Sciences
2014
Metal-halide perovskites have rapidly emerged as one of the most promising materials 21st century, with many exciting properties and great potential for a broad range applications, from photovoltaics to optoelectronics photocatalysis. The ease which metal-halide can be synthesized in form brightly luminescent colloidal nanocrystals, well their tunable intriguing optical electronic properties, has attracted researchers different disciplines science technology. In last few years, there been...
We report the nontemplated colloidal synthesis of single crystal CsPbBr3 perovskite nanosheets with lateral sizes up to a few micrometers and thickness just unit cells (i.e., below 5 nm), hence in strong quantum confinement regime, by introducing short ligands (octanoic acid octylamine) together longer ones (oleic oleylamine). The size is tunable varying ratio shorter over ligands, while mainly unaffected this parameter stays practically constant at 3 nm all syntheses conducted short-to-long...
An increasing number of studies have recently reported the rapid degradation hybrid and all-inorganic lead halide perovskite nanocrystals under electron beam irradiation in transmission microscope, with formation nanometer size, high contrast particles. The nature these nanoparticles involved transformations are still a matter debate. Herein, we studied effects energy (80/200 keV) on colloidal cesium bromide (CsPbBr3) different shapes sizes, especially 3 nm thick nanosheets, morphology that...
ADVERTISEMENT RETURN TO ISSUEPREVCommunicationNEXTColloidal Synthesis of Strongly Fluorescent CsPbBr3 Nanowires with Width Tunable down to the Quantum Confinement RegimeMuhammad Imran†§, Francesco Di Stasio†, Zhiya Dang†, Claudio Canale‡, Ali Hossain Khan†, Javad Shamsi†§, Rosaria Brescia†, Mirko Prato*†, and Liberato Manna*†View Author Information† †Nanochemistry ‡Nanophysics Departments, Istituto Italiano di Tecnologia, Via Morego 30, 16163 Genova, Italy§ Dipartimento Chimica e...
Abstract Polarized light is critical for a wide range of applications, but usually generated by filtering unpolarized light, which leads to substantial energy losses and requires additional optics. Here we demonstrate the direct emission linearly polarized from light-emitting diodes made CsPbI 3 perovskite nanoplatelet superlattices. The use solvents with different vapour pressures enables self-assembly nanoplatelets fine control over their orientation (either face-up or edge-up) therefore...
Lead halide perovskite nanocrystals are an emerging class of materials that have gained wide interest due to their facile color tuning and high photoluminescence quantum yield. However, the lack techniques translate performance into solid films restricts successful exploitation such in optoelectronics applications. Here, we report a heat-up large-scale synthesis quantum-confined, blue-emitting CsPbBr3 nanoplatelets (NPLs) self-assemble stacked lamellar structures. Spin-coated fabricated from...
Quantum-confined CsPbBr3 nanoplatelets (NPLs) are extremely promising for use in low-cost blue light-emitting diodes, but their tendency to coalesce both solution and film form, particularly under operating device conditions with injected charge-carriers, is hindering adoption. We show that employing a short hexyl-phosphonate ligand (C6H15O3P) heat-up colloidal approach pure, blue-emitting quantum-confined NPLs significantly suppresses these coalescence phenomena compared particles capped...
Optoelectronic devices based on lead halide perovskites are processed in facile ways, yet remarkably efficient. There extensive research efforts investigating lead-free perovskite and perovskite-related compounds, there challenges to synthesize these materials forms that can be directly integrated into thin film rather than as bulk powders. Here, we report the colloidal synthesis characterization of lead-free, antifluorite Cs2ZrX6 (X = Cl, Br) nanocrystals readily films. We use transmission...
Two-dimensional colloidal halide perovskite nanocrystals are promising materials for light-emitting applications. Recent studies have focused on nanoplatelets that able to self-assemble and transform solid substrates. However, the mechanism behind process atomic arrangement of their assemblies remain unclear. Here, we present a detailed analysis transformation self-assembled stacks CsPbBr3 in solution over period few months by using ex situ transmission electron microscopy surface analysis....
Hierarchical multi-shelled nanoporous mixed copper cobalt phosphide microspheres have been for the first time developed as a novel advanced electrode with superior electrochemical properties.
ADVERTISEMENT RETURN TO ISSUEPREVCommunicationNEXTColloidal CsX (X = Cl, Br, I) Nanocrystals and Their Transformation to CsPbX3 by Cation ExchangeJavad ShamsiJavad ShamsiNanochemistry Department, Istituto Italiano di Tecnologia, Via Morego 30, 16163 Genova, ItalyUniversità degli Studi Dodecaneso, 31, 16146 ItalyMore Javad Shamsihttp://orcid.org/0000-0003-4684-5407, Zhiya DangZhiya DangNanochemistry Dang, Palvasha IjazPalvasha IjazNanochemistry Ijaz, Ahmed L. AbdelhadyAhmed...
3D ordered nanocrystalline nanoporous NiMoO<sub>4</sub> with high surface area and bimodal pore size distribution has been synthesized by nanocasting from mesoporous silica KIT-6, applied as high-performance supercapacitor electrode material.
3D LSG/CoNi2S4//LSG interdigitated microelectrodes have been firstly developed by a facile, scalable and low cost process for all-solid-state, flexible integrated asymmetric micro-supercapacitors. These devices can achieve energy densities of up to 49 W h l-1 which is comparable those lead acid batteries.
Cesium lead halide perovskite (CsPbX3, with X = Br, Cl, I) nanocrystals have been found to undergo severe modifications under the high-energy electron beam irradiation of a transmission microscope (80/200 keV). In particular, in our previous work, together halogen desorption, Pb2+ ions were be reduced Pb0 and then diffused form nanoparticles at temperatures above −40 °C. Here, we present detailed study CsPbBr3 below °C, range which diffusion atoms/clusters is drastically suppressed. Under...
We report chemical routes for the synthesis of both nanocrystals and bulk crystals methylammonium (MA) lead halide perovskites employing N-methylformamide (NMF) as a source MA ions. Colloidal were prepared by transamidation reaction between NMF an alkyl amine (oleylamine). The showed photoluminescence quantum yields reaching 74% MAPbBr3 60% MAPbI3. Bulk grown at room temperature, with no need antisolvent, acid hydrolysis NMF. Important advantages using instead salts are that syntheses...
Lead halide perovskites, owing to their flexible, scalable chemistry and promising physical properties are attracting increasing attention for solution-processed optoelectronic photonic technologies. Despite well-known 'defect tolerant' electronic structure, studies highlighted the active role of shallow deep defect states, as well oxidative environmental conditions, on optical electrical behavior perovskite nanocubes, films single bulk crystals. To date, however, no in-depth systematic...
Lead halide perovskite nanocrystals are extremely promising for photoelectronic application. However, maximizing their stability toward water, UV irradiation, or heat is yet a great challenge the commercialization process. Herein, we develop novel and facile surface functionalization approach that combined coating by SiO2 layer with modification intrinsically hydrophobic methyl groups fabrication of superhydrophobic SiO2-coated CsPbBr3 (referred as SH-CsPbBr3@SiO2) nanoparticle films. The...
Abstract Lead halide perovskites (LHP) are rapidly emerging as efficient, low‐cost, solution‐processable scintillators for radiation detection. Carrier trapping is arguably the most critical limitation to scintillation performance. Nonetheless, no clear picture of and detrapping mechanisms to/from shallow deep trap states involved in process has been reported date, well on role material dimensionality. Here, this issue addressed by performing, first time, a comprehensive study using...
Abstract Emerging functional materials such as halide perovskites are intrinsically unstable, causing long-term instability in optoelectronic devices made from these materials. This leads to difficulty capturing useful information on device degradation through time-consuming optical characterization their operating environments. Despite challenges, understanding the mechanism is crucial for advancing technology towards commercialization. Here we present a self-supervised machine learning...