A5028881873- Perovskite Materials and Applications
- Radiation Detection and Scintillator Technologies
- X-ray Diffraction in Crystallography
- Crystallization and Solubility Studies
- Atomic and Subatomic Physics Research
- Lanthanide and Transition Metal Complexes
- Luminescence and Fluorescent Materials
- Luminescence Properties of Advanced Materials
- Medical Imaging Techniques and Applications
- Advanced X-ray and CT Imaging
- Metal-Organic Frameworks: Synthesis and Applications
- Nanocluster Synthesis and Applications
- Organic Light-Emitting Diodes Research
- Quantum Dots Synthesis And Properties
- Conducting polymers and applications
- Quantum optics and atomic interactions
- Magnetism in coordination complexes
- Organic Electronics and Photovoltaics
- Advanced Memory and Neural Computing
- Microwave Dielectric Ceramics Synthesis
- Neurological Complications and Syndromes
- Chalcogenide Semiconductor Thin Films
- Machine Learning in Materials Science
- High-pressure geophysics and materials
- Advanced Nanomaterials in Catalysis
King Abdullah University of Science and Technology
2021-2024
UNSW Sydney
2019-2021
Materials Science & Engineering
2019-2021
Flexible copper halide films of 400 cm2 area were fabricated with outstanding mechanical stability, excellent film uniformity, nearly 100% photoluminescence quantum yields, and resistance to water heat. The re-absorption-free X-ray imaging scintillators engineered based on these exhibit superior scintillation performance a detection limit as low 48.6 nGy/s 17 lp/mm resolution, representing the highest resolution for powder-based screens.
Scintillators are critical for high-energy radiation detection across a wide array of potential applications, from medical radiography and safety inspections all the way to space exploration. However, constrained by their current shortcomings, including high-temperature complex fabrication as well inherent brittleness fragility among thick films bulk crystals, traditional scintillators finding it difficult meet rising demand cost-effective, ecofriendly, flexible X-ray detection. Here, we...
Copper-based halide scintillators have attracted considerable interest because of their high light yields, low detection limits, toxicity, and moderate fabrication conditions. Here, we synthesized two Cu(I) iodide inks, comprising zero-dimensional Cu4I6(L1)2 nanoparticles (L1 = 1-propyl-1,4-diazabicyclo[2.2.2]octan-1-ium) one-dimensional Cu4I6(L2)2 nanorods (L2 4-dimethylamino-1-ethylpyridinium) for X-ray imaging application. The exhibited broadband green yellow emission with an ultrahigh...
Abstract The exacerbation of inherent light scattering with increasing scintillator thickness poses a major challenge for balancing the thickness‐dependent spatial resolution and scintillation brightness in X‐ray imaging scintillators. Herein, thick pixelated needle‐like array capable micrometer is fabricated via waveguide structure engineering. Specifically, this involves integrating straightforward low‐temperature melting process manganese halide an aluminum‐clad capillary template. In...
The weak X-ray capture capability of organic scintillators always leads to poor imaging resolution and detection sensitivity. Here, we realize an efficient reabsorption-free scintillator at the interface perovskite nanosheets using a very energy transfer strategy. Our steady-state ultrafast time-resolved experiments supported by density functional theory calculations demonstrate that interfacial from nanosheet chromophore with thermally activated delayed fluorescence (TADF) character can be...
Abstract Hybrid organic‐inorganic halide perovskites are actively pursued for optoelectronic technologies, but the poor stability is Achilles’ heel of these materials that hinders their applications. Very recently, it has been shown lead sulfide (PbS) quantum dots (QDs) can form epitaxial interfaces with perovskite matrix and enhance overall stability. In this work, demonstrated embedding QDs significantly modify transport property pristine single crystals, endowing them new functionalities...
Lead-free organic metal halide scintillators with low-dimensional electronic structures have demonstrated great potential in X-ray detection and imaging due to their excellent optoelectronic properties. Herein, the zero-dimensional copper (18-crown-6)
Dual-energy X-ray imaging (DEXI) is a cutting-edge technology that provides more detailed material-specific information than the traditional single-energy strategy. Herein, we designed and fabricated top-filter-bottom (TFB) sandwich structure scintillator for high-resolution DEXI within single exposure. More specifically, low- high-energy photons were sequentially absorbed by top bottom scintillators efficiently converted into their corresponding emission colors. By discriminating between...
Luminescent copper halide clusters have attracted wide attention in light-emitting diodes and optical sensors due to their intriguing physicochemical properties diverse chemical structures. Recently, the also been explored as promising scintillation materials heavy cores that provide a large absorption cross section for X-ray radiation. However, related research on cluster scintillators is only its infancy, performance of still lags behind perovskite metal Here we report 0D cubane-like...
Thermally activated delayed fluorescence (TADF) X-ray scintillators have attracted increasing attention because of their theoretical ability to utilize 100% radiation-induced excitons. However, scintillation performance is severely hampered by typically low attenuation efficiencies or mechanochromic properties. Here, we demonstrate hybrid organic–inorganic TADF with remarkably high absorption cross sections based on non-mechanochromic Cu2X2 (X = Cl, Br, I) nanoclusters. The nanoclusters...
Abstract Fast neutron and X‐ray imaging are considered complementary nondestructive detection technologies. However, due to their opposite cross‐sections, development of a scintillator that is sensitive both fast neutrons X‐rays within single‐material framework remains challenging. Herein, an organic–inorganic hybrid perovskite (C 4 H 9 NH 3 ) 2 PbBr (BPB) demonstrated as fully meets the requirements for detection. The hydrogen‐rich organic component acts converter produces detectable recoil...
Thermally activated delayed fluorescence (TADF) materials have numerous applications in energy conversion and luminescent imaging. However, they are typically achieved as metal-organic complexes or pure organic molecules. Herein, we report the largest Au-Ag-oxo nanoclusters to date, Au18Ag26(R1COO)12(R2C≡C)24(μ4-O)2(μ3-O)2 (Au18Ag26, where R1 = CH3-, Ph-, CHOPh- CF3Ph-; R2 Ph- FPh-). These exhibit exceptional TADF properties, including a small S1-T1 gap of 55.5 meV, high absolute...
Aggregation of some chromophores generates very strong fluorescence signals due to the tight molecular packing and highly restricted vibrational motions in electronically excited states. Such an aggregation-induced emission enhancement enables great strides biomedical imaging, security screening, sensing, light communication applications. Here, we realized efficient utilization a series luminogens (AIEgens) X-ray imaging scintillators optical wireless (OWC) technology. Ultrafast...
Cutting-edge techniques utilizing continuous films made from pure, novel semiconductive materials offer promising pathways to achieve high performance and cost-effectiveness for X-ray detection. Semiconductive metal-organic framework (MOF) glass are known their remarkably smooth surface morphology, straightforward synthesis, capability large-area fabrication, presenting a new direction high-performance detectors. Here, material centered on MOF glasses highly uniform film fabrication...
Abstract Organolead trihalide perovskites have emerged as a new class of competitive solution‐processed semiconductors due to their unique optoelectronic properties. However, poor ambient stability and charge transport are the Achilles’ heel hybrid perovskites, thus limiting applications. In this work, microwave‐assisted synthesis is applied for first time rapidly grow perovskite single crystals embedded with single‐wall carbon nanotubes. These nanotube‐in‐perovskite endowed carrier mobility...
Intermolecular charge transfer (CT) complexes have emerged as versatile platforms with customizable optical properties that play a pivotal role in achieving tunable photoresponsive materials. In this study, we introduce an innovative approach for enhancing the modulation bandwidth and net data rates wireless communications (OWCs) by manipulating combinations of monomeric molecules within intermolecular CT complexes. Concurrently, extensively investigate mechanism through diverse steady-state...
Solution-processed perovskite materials have been enticing candidates for optical gain and lasing media because of their low cost, remarkable color purity, facile bandgap tunability, high absorption cross-section. However, it is difficult, if not impossible, them to highly amplify light with stable operations they experience severe non-radiative emission losses due density surface bulk defect centers irregular composition. Here, we report that incorporating 5% methylenediammonium dichloride...