A high Z CsPbBr3 halide perovskite with large charge carrier diffusion length was used for radiation detection applications. The sensitivity X-ray detector is expected to be imaging free-seeding single crystals (SCs) were directly grown on ITO glass. We fabricated the Ag/CsPbBr3/ITO sandwich structural Schottky contact at room temperature. investigated and phase-contrast of all-inorganic SCs. devices exhibit performances low dark current density (∼5–27 nA/cm2) (770 μC·Gy–1·cm–2) an applied...

Abstract Low-dimensional perovskite materials and their derivatives with excellent optical performance are promising candidates for light-emission applications. Herein, centimeter lead-halide Cs 4 PbBr 6 single crystals (SCs), which have been used radiation detection the indirect conversion method, were synthesized by a facile solution process. The scintillator exhibits bright green emission peaking at 525 nm high photoluminescence quantum yield (up to 86.7%) under 375 laser excitation. SCs...

Two-dimensional (2D) structures hold promise as advanced lithium-ion battery (LIB) anode materials. Recently synthesized 2D graphullerene faces challenges due to its large electronic insulating band gap. In this study, we construct a quasi-tetragonal graphullerene, C36, denoted GrF-C36, using C36 fullerenes with D6h symmetry the structural unit. First-principles calculations revealed that delocalized pz orbitals lead metallicity, combined intrinsic porosity, resulting in theoretical capacity...

Lead halide perovskite single crystals with a high X-ray stopping power and large μτ product have been successfully used for detection. However, poor air stability ionic migration lead to the degradation of devices long-term operations. Here, we report solution-processed 0D bulk Cs4PbI6 crystal, which I atoms in isolated [PbI6]4–. This crystal has 9.7 × 10–4 cm2 V–1 an activation energy 321.28 meV. We fabricated photoconductor device symmetric Au/Cs4PbI6/Au sandwich structure, exhibits...

Because of the extraordinary properties including high atomic numbers and large μτ products, metal halide perovskites have been widely employed used for radiation detecting. Cs4PbI6 material has a X-ray attenuation coefficient excellent electrical that good potential in detection applications. Here, we designed flexible polymer-encapsulated Au/Cs4PbI6/Au detector with outstanding sensitivity 256.20 μC Gy–1 cm–2 irradiated by 30 keV at 10 V bias, long-time stability, durable flexibility...

Abstract Lead halide quantum dots (QDs) have unique optical properties such as a tunable wavelength, narrow band, and high efficiency, been used in optoelectronics light-emitting diode device, photodetector. Recently, solution-processed perovskite has also attracted great attention for sensitivity x-ray detector. Here, we investigated the scintillation performances of Pb QDs solution. Both CH 3 NH PbBr CsPbBr liquid scintillator exhibits linear relationship with irradiation dose rate wide...

A surface modified-CsPbBr3/polybutylmethacrylate (PBMA) nanocomposite is reported to be a scintillator that enables us provide high contrast X-ray image using common charge-coupled device (CCD) camera. Bis(2-(methacryloyloxy)ethyl) phosphate (BMEP) was employed alter the ratio of original ligands on CsPbBr3 nanocrystal (NC) for optimizing optical performance CsPbBr3/PBMA nanocomposites. The nanocomposites with concentration 0.02 wt % NCs exhibit more than 70% transmittance in visible region...

We demonstrate an infrared spectrometer based on waveguide-coupled nanocavity filters in a planar photonic crystal structure. The input light is coupled into the waveguide, from which spectral components are dropped cavities and radiated off-chip for detection commercial InGaAs camera. has footprint of only 60 μm by 8 μm. resolution about 1 nm operation bandwidth 1522–1545 nm. By substituting membrane material structure parameters, this design can be easily extended visible regime developed...

The synthesis of C60-based two-dimensional (2D) fullerene networks has attracted wide interest in graphullerene. In this study, based on the C24 fullerenes, we theoretically construct quasi-tetragonal 2D graphullerene and its three-dimensional (3D) structures, denoted as GrF-C24 3D-C24, respectively. First-principles calculations reveal that both structures release energy during polymerization, together with double [2 + 2] cycloaddition bonding between C24s, promoting better stability....

Incorporating ferrocenecarboxylato(-1) into [CuI2(μ-dppm)2]2+ (dppm = bis(diphenylphosphino)methane) led to the isolation of a heterometallic complex [Cu2(μ2-η1,η1dppm)2(μ2-η1, η1FcCOO)(CH3CN)]BF4·CH3CN (1). It was characterized by infrared spectroscopy (IR), elemental analysis (EA), powder X-ray diffraction (PXRD), ultraviolet–visible spectrum (UV–Vis), nuclear magnetic resonance (NMR), and thermogravimetric (TGA). Single-crystal structural revealed that coordinated [Cu2(μ2-η1,η1dppm)2]2+...

Electromagnetic field absorbers with ultranarrow relative bandwidth (<1%) and extremely high peak absorbance (>90%) are a challenge in terahertz frequency. In this paper, we propose an insulator-metal-insulator-metal stacked structure nearly unity (∼99%) 0.77% as ultranarrowband perfect absorber. Even though the composite contains reflective metal layers, however, thanks to introduction of top insulator, can tunnel through upper gold film at some functional tunneling bands. As result, energy...

Time response and light yield are two of the most important features a scintillation detector, mostly determined by luminescence properties scintillator. Here we have investigated radioluminescence (RL) characteristics single-crystalline hybrid lead halide perovskite at both room temperature low temperature. A dual-channel single photon correlation (DCSPC) system with vacuum chamber is employed for measurement. rise time faster than 100 ps several times enhancement crystal performances been...

In this paper, we predict an unexpected perfect optical absorption phenomenon of oblique-incident transverse magnetic polarized light in a metallic grating situated asymmetric surroundings. Two physical processes result the anomalous absorption: One is total internal reflection at grating's interface; another Fabry-Pérot-like resonance supported slits. For small filling factor (f <; 0.9), enhanced only appears grazing incidence with incident angle larger than 85°; however, if sufficiently...

We present a new mechanism to realize broadband transmission (BT) at near infrared in dual-layer metallic-silver-grating structure with silicon nitride dielectric spacer. The physical is ascribed the partial degeneracy between first-order magnetic polariton (MP <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">1</sub> ) mode supported thin spacer and Fabry-Pérot-like resonant modes gratings' slits. With parameters optimized, high transmittance up...

Density-functional theory (DFT) has been used to calculate the interaction of nitric oxide with 3d metal dimers (scandium through zinc) and determine ground-state geometrical configurations vibrational frequencies. Results are compared relevant experimental values other theoretical investigations when available, overall agreement obtained. On going from left right side Periodic Table, preference for coordination mode NO transition-metal is side-on-bonded (Sc, Ti, V), via semibridging (Cr),...

Abstract C 18 H 22 F 4 N O , triclinic, P 1̄ (no. 2), a = 7.3295(9) Å, b 8.6026(9) c 8.8041(11) α 77.240(4)°, β 72.215(4)°, γ 71.531(4)°, V 496.61(10) Å 3 Z 1, R gt ( ) 0.1022, wR ref 2 0.1587, T 294(2) K.