Mechanochemical Synthesis of Phase-Pure CsCu₂I₃ and Cs₃Cu₂I₅ Phosphors Regulated by Polar Solvents and Their Application in Tunable Chromaticity LEDs

Inorganic Chemistry, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 10, 2025

Lead halide perovskites have garnered interest in light-emitting diode (LED) applications due to their strong emission and tunable properties. However, conventional synthesis methods involve energy-intensive thermal processes hazardous organic solvents, raising environmental concerns. In this study, we report a simple eco-friendly mechanochemical approach that produces phase-pure blue-emitting Cs

Language: Английский

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Metal/Perovskite Plasmonic–Photonic Heterostructures for Active and Passive Detection Devices

Micromachines, Journal Year: 2025, Volume and Issue: 16(4), P. 424 - 424

Published: April 1, 2025

Recent advancements in metal/perovskite photodetectors have leveraged plasmonic effects to enhance the efficiency of photogenerated carrier separation. In this work, we present an innovative approach designing heterostructure that involved integrating a perovskite film with metasurface. Using finite-difference time-domain (FDTD) simulations, investigated formation hybrid photonic–plasmonic modes and examined their quality factors relation loss mechanisms. Our results demonstrate these facilitated strong light confinement within layer, significant intensity enhancement at metal–perovskite interface—an ideal condition for efficient charge generation. We also propose use low-bandgap perovskites direct infrared passive detection explore potential highly Stokes-shifted active applications, including ultraviolet X-ray radiation.

Language: Английский

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Biodegradable and Ultra-High Expansion Ratio PPC-P Foams Achieved by Microcellular Foaming Using CO2 as Blowing Agent

Nanomaterials, Journal Year: 2024, Volume and Issue: 14(13), P. 1120 - 1120

Published: June 29, 2024

Poly(propylene carbonate-co-phthalate) (PPC-P) is an amorphous copolymer of aliphatic polycarbonate and aromatic polyester; it possesses good biodegradability, superior mechanical performances, high thermal properties, excellent affinity with CO2. Hence, we fabricate PPC-P foams in autoclave by using subcritical CO2 as a physical blowing agent. Both saturation pressure foaming temperature affect the behaviors PPC-P, including adsorption desorption performance, ratio, cell size, porosity, density, nucleation which are investigated this research. Moreover, low-cost PPC-P/nano-CaCO3 PPC-P/starch composites prepared foamed same procedure. The obtained PPC-P-based show ultra-high expansion ratio refined microcellular structures simultaneously. Besides, nano-CaCO3 can effectively improve PPC-P's rheological properties foamability. In addition, introduction starch into lead to large number open cells. Beyond all doubt, work certainly provide both kind new biodegradable foam materials economic methodology make plastic foams. These potentially applicable packaging, transportation, food industry.

Language: Английский

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Unveiling the Influence of Organic Chain Length on the Physical Properties of Two-Dimensional Cobalt-Based Hybrid Perovskites

The Journal of Physical Chemistry C, Journal Year: 2024, Volume and Issue: 128(18), P. 7572 - 7582

Published: April 25, 2024

Recent interest in two-dimensional (2D) lead-free hybrid organic–inorganic perovskites (HOIPs) has driven significant progress the development of magnetic and electronic materials. Herein, we systematically compare a series low-temperature growth 2D cobalt-based HOIPs (Co-HOIPs) by varying methylene chain length (n) n = 1, 2, 3, 4, for first time. The Co-HOIP crystal structure with single carbon displays monoclinic arrangement space group P21/c, while those two, three, four lengths manifest triclinic structures P1. optical measurements exhibit apparent odd–even effects as function organic ligand. first-order phase transitions BA2CoCl4 are distinctly observed at temperatures 12.46 139.77 °C compared to shorter EA2CoCl4 counterparts. Notably, this particular compound exhibits highest saturation coercive fields Ms 0.160 emu/g Hc 19.416 T, respectively. Furthermore, demonstrates superior dielectric properties, evidenced shortest diameter equivalent circuit EIS. These findings underscore potential diverse applications devices, highlighting its promising role advanced technological applications.

Language: Английский

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Enhancing Emission and Stability in Na-Doped Cs3Cu2I5 Nanocrystals

Nanomaterials, Journal Year: 2024, Volume and Issue: 14(13), P. 1118 - 1118

Published: June 28, 2024

Lead-free Cs3Cu2I5 metal halides have garnered significant attention recently due to their non-toxic properties and deep-blue emission. However, relatively low photoluminescence quantum efficiency poor stability limited applications. In this work, sodium iodide (NaI) is used facilitate the synthesis of nanocrystals (NCs), demonstrating improved intensity, yield, stability. Systematic optoelectronic characterizations confirm that Na+ successfully incorporated into lattice without altering its crystal structure. The Photoluminescence Quantum Yield (PLQY) are attributed strengthened chemical bonding, which effectively suppresses vacancy defects in lattice. Additionally, light-emitting diodes (LEDs) based on 10% NaI-doped NCs were assembled, emitting vibrant blue light with a maximum radiant intensity 82 lux Commission Internationale de l’Eclairage (CIE) chromaticity coordinates (0.15, 0.1). This work opens new possibilities for commercial lighting display

Language: Английский

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Highly efficient In(I) doped Cs3Cu2I5 single crystals for light-emitting diodes and gamma spectroscopy applications

Optical Materials X, Journal Year: 2024, Volume and Issue: 23, P. 100335 - 100335

Published: July 1, 2024

High-quality Cs3Cu2I5:In single crystals with a 7 mm diameter were grown by using the vertical Bridgman method. These have high optical transmittance (>75 %) and emit bright red-orange light under both UV X-ray irradiation. The can exhibit photoluminescence quantum efficiency (PLQY) of 79.5 %, thus we explored potential applications for light-emitting diodes (LED). fabricated LED demonstrated CIE color coordinates (0.553, 0.431) rendering index (Ra) 77, making it suitable supplementary in plant growth. Moreover, evaluated their gamma-ray spectroscopy capability an avalanche photodiode (APD) detector. Under 137Cs irradiation, gamma scintillation yield energy resolution gradually degraded as In concentration increased, which be attributed to enhanced afterglow after doping.

Language: Английский

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Ultra‐Broad Emission Copper Halide Scintillator‐Based X‐Ray Imager

Advanced Science, Journal Year: 2024, Volume and Issue: unknown

Published: Nov. 26, 2024

Abstract Lead‐free metal‐halide scintillators are gaining considerable attention as more eco‐friendly and superior alternatives to their lead‐based counterparts. However, novel broad‐emission band like the state‐of‐the‐art CsI: Tl scintillator, which can generate high signals due its strong compatibility with spectral responsivity of regular photodiode arrays, still less investigated. Herein, a TPA 2 Cu I 4 (TPACI) copper halide scintillator unique ultra‐broad emission (FWHM > 240 nm) is developed, shows universal peak response range commercial photodetector. The optical properties characterization mechanism analysis indicates that this spectrum be attributed dual self‐trapped exciton (STE) consisting two bands. Benefiting from large Stokes shift enabled by STE, self‐absorption‐free TPACI exhibits efficient white light photoluminescence quantum yields 94.27%, yield ≈40124 photons MeV −1 . Moreover, prototype scintillator‐based X‐ray imager assembled for inspecting internal structures biological electronic devices, demonstrated resolution 5.5 lp mm at modulation transfer function = 0.2. These findings provide insights into design efficient, high‐resolution imaging.

Language: Английский

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Mechanochemical synthesis of luminescent caesium copper iodide perovskite

Materials Today Proceedings, Journal Year: 2024, Volume and Issue: unknown

Published: April 1, 2024

Language: Английский

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Cation Engineering of Cu-Doped CsPbI₃: Lead Substitution and Dimensional Reduction for Improved Scintillation Performance

The Journal of Physical Chemistry C, Journal Year: 2024, Volume and Issue: 128(47), P. 20324 - 20332

Published: Nov. 13, 2024

To date, inorganic halide perovskite nanocrystals show promising contributions in emerging luminescent materials due to their high tolerance defects. In particular, the development of cesium lead iodide (CsPbI3) has shown its efficiency for light-harvesting properties. However, further implementation is hindered toxicity content. Therefore, this study, we introduced Cu atoms partially substitute Pb (5% Cu) CsPbI3 lattice as a solution reduce toxicity. Partial substitution with host increases Stokes shift (∼67 nm) compared pristine CsPbI3, thereby preventing undesired self-absorption. An outcome focused on champion fast component (τ1) decay time ∼0.6 ns. Temperature-dependent radioluminescence outlines an incremental change emission intensity marginally centered at 713 ± 16 nm, which indicates that Cu-doped not greatly affected by temperature. addition, report light yield after doping increased 3.0 0.8 photons/keV. Our work provides physical insights into tunable scintillation property using transition metal toward lead-free-based scintillating perovskites.

Language: Английский

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The Incorporation of CsCu₂I₃ Nanocrystals into Polydimethylsiloxane Matrix for X‐ and γ‐Ray Scintillators

physica status solidi (RRL) - Rapid Research Letters, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 22, 2024

CsCu 2 I 3 lead‐free nanocrystals (NCs) have recently garnered significant interest for their outstanding optical and scintillation characteristics, particularly X‐ray imaging applications. In this study, NCs are mixed with polydimethylsiloxane (PDMS) resin in the form of a pellet to protect against environmental factors such as moisture. The resulting sample exhibits light yield up ph keV −1 an excellent energy resolution 13% γ‐ray excitation at 662 room temperature. Additionally, NCs–PDMS shows no afterglow has negligible trap density. Herein, high stability low irradiation intensities reasonable higher demonstrated. Moreover, features fast component decay times 3.55 ns, which is slightly faster than that (BZA) PbBr 4 . This outcome possesses promising combination designing lightweight flexible hybrid PDMS‐based materials scintillators. These properties can be candidate affordable screens X‐ photon‐counting computed tomography.

Language: Английский

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