Sb³⁺-Doped Indium-Based Metal Halide (Gua)₃InCl₆ with Efficient Yellow Emission

ACS Applied Materials & Interfaces, Journal Year: 2024, Volume and Issue: 16(3), P. 3841 - 3852

Published: Jan. 11, 2024

In recent years, low-dimensional organic–inorganic hybrid metal halides (OIHMHs) have shown excellent photophysical properties due to their quantum structure, adjustable energy levels, and transfer between inorganic organic components, which attracted extensive attention from researchers. Herein, we synthesize a zero-dimensional (0D) OIHMH, Sb3+:(Gua)3InCl6, by introducing Sb3+ into (Gua)3InCl6, undergoes significant enhancement of the emission peak at 580 nm with photoluminescence yield (PLQY) boosted 17.86 95.72% when excited 340 nm. This boost in doped sample was studied combining ultrafast femtosecond transient absorption, temperature-dependent (PL) spectra, density functional theory (DFT) calculation, revealing process self-trapped exciton (STE) recombination emit light both Sb sites this 0D structure simultaneously. material lowest dark STE level site for undoped can amazingly very strong sample, has never been observed before. Finally, tested its application photoelectric device. work not only helps gain deeper understanding formation STEs In-based but also plays certain guiding role design new luminescent materials.

Language: Английский

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Achieving Near‐Unity Red Light Photoluminescence in Antimony Halide Crystals via Polyhedron Regulation

Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: 63(24)

Published: April 15, 2024

Exploration of efficient red emitting antimony hybrid halide with large Stokes shift and zero self-absorption is highly desirable due to its enormous potential for applications in solid light emitting, active optical waveguides. However, it still challenging rarely reported. Herein, a series (TMS)

Language: Английский

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Simultaneous NIR Emission and Thermal Stability Enhancement in Garnet‐Type NIR Phosphors through the Synergistic Effect of Lattice Distortion and Enhanced Rigidity

Laser & Photonics Review, Journal Year: 2024, Volume and Issue: 18(10)

Published: May 3, 2024

Abstract Even though there have been significant advancements in the development of Cr 3+ ‐activated near‐infrared (NIR) phosphors, challenge still remains to develop highly efficient and thermally stable NIR phosphors. Here, Ca 4‐x Zn x HfGe 3 O 12 :0.03Cr solid solution phosphors with 834–806 nm emission are constructed by substituting 2+ for , thereby facilitating formation [ZnO 6 ] luminescence site. The coexistence [HfO [Zn/CaO centers is confirmed through DFT calculation, time‐resolved photoluminescence (TRPL) spectroscopy, low‐temperature‐photoluminescence (77 K) spectroscopy. effectively resolves issue lattice mismatch between . Furthermore, simultaneous enhancement intensity thermal stability realized a synergistic combination distortion rigidity enhancement. By optimizing substitution concentration internal quantum efficiency (IQE) 92% an external (EQE) 29% finally achieved. Meanwhile, also enhanced from 59%@400 K (x = 0) 81%@400 0.8). developed phosphor‐converted light‐emitting diodes (pc‐LEDs) exhibit promising prospects fields security, biomedicine, non‐destructive testing rapid identification.

Language: Английский

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Realizing efficient broadband near-infrared emission and multimode photoluminescence switching via coordination structure modulation in Sb³⁺-doped 0D organic metal chlorides

Materials Horizons, Journal Year: 2024, Volume and Issue: 11(9), P. 2230 - 2241

Published: Jan. 1, 2024

We developed three NIR emitters of Sb 3+ -doped 0D organic metal chlorides and demonstrated their night vision applications in vision. One shows tunable emission characteristics quintuple-mode fluorescence anti-counterfeiting information encryption.

Language: Английский

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Near‐infrared emitting metal halide materials: Luminescence design and applications

InfoMat, Journal Year: 2024, Volume and Issue: 6(5)

Published: March 28, 2024

Abstract Near‐infrared (NIR) luminescent metal halide (LMH) materials have attracted great attention in various optoelectronic applications due to their low‐temperature solution‐processable synthesis, abundant crystallographic/electronic structures, and unique properties. However, some challenges still remain luminescence design, performance improvement, application assignments. This review systematically summarizes the development of NIR LMHs through classifying origins into four major categories: band‐edge emission, self‐trapped exciton (STE) ion defect‐related emission. The mechanisms different types are discussed detail by analyzing typical examples. Reasonable strategies for designing optimizing luminescence/optoelectronic properties summarized, including bandgap engineering, self‐trapping state chemical composition modification, energy transfer, other auxiliary such as improvement synthesis scheme post‐processing. Furthermore, prospects based on devices revealed, phosphor‐converted light‐emitting diodes (LEDs), electroluminescent LEDs, photodetectors, solar cells, x‐ray scintillators, well demonstrations related practical applications. Finally, existing future perspectives LMH critically proposed. aims provide general understanding guidance design high‐performance materials. image

Language: Английский

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Blue‐Light‐Excitable Red‐to‐Near Infrared Photoluminescence in 0D Antimony(III) Bromide Hybrids for Supplemental Lighting

Advanced Optical Materials, Journal Year: 2024, Volume and Issue: 12(16)

Published: Feb. 21, 2024

Abstract Antimony (III)‐containing halide hybrids possess a distinctive stereoactivity with 5s 2 lone pair, which further induces significant structural distortions upon light excitation. Herein disordered dis ‐[TPPen] SbBr 5 (TPPen = triphenylpentylphosphonium) and ordered ord , have been synthesized exhibit self‐trapped excitons (STEs) emissions in the red‐to‐near infrared (NIR) range. Benefiting from high distortion degree of STEs confined within [SbBr ] 2− unit pronounced alterations Sb─Br bond lengths blue‐light excitation, achieves greater level excited state larger Stokes shift than those . The fabrication blue NIR light‐emitting device based on demonstrates prospective application night vision supplemental lighting non‐destructive examination. This work provides valuable molecular design strategies for luminescent materials hybrid metal halides.

Language: Английский

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Temperature/Component‐Dependent Luminescence in Lead‐Free Hybrid Metal Halides for Temperature Sensor and Anti‐Counterfeiting

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(34)

Published: June 6, 2024

Abstract Hybrid metal halides (HMHs) have emerged as a promising platform for optically functional crystalline materials, but it is extremely challenging to thoroughly elucidate the electron transition coupled additional ligand emission. Herein, discover sequences of lead‐free HMHs with distinct active cations are aimed, that is, Sb 3+ (5s 2 ) lone‐pair configuration and In (4d 10 fully‐filled configuration. (Me NH 4 M Cl 6 ·Cl = −CH 3 , Sb, In) exhibits superior temperature/component‐dependent luminescence behaviors resulting from competition between triplet‐states (T n ‐S 0 self‐trapped excitons (STEs) inorganic units singlet‐state (S 1 organic cations, which manipulated by optical activity levels [SbCl ] 3− [InCl . The bonding differences /In − in terms electronic excitation hybridization emphasized, different electron‐transition mechanisms established according PL spectra at extreme temperature 5 305 K theoretical calculations. By fine‐tuning B‐site alloying, photoluminescence quantum yield (PLQY 81.5%) stability optimized 20% alloying This research sheds light on rules governing HMHs, well exploring optical‐functional application aviation sensors access‐control systems.

Language: Английский

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Excitation-mode-selective emission through multiexcitonic states in a double perovskite single crystal

Light Science & Applications, Journal Year: 2025, Volume and Issue: 14(1)

Published: Jan. 2, 2025

Abstract Low-dimensional lead-free metal halide perovskites are highly attractive for cutting-edge optoelectronic applications. Herein, we report a class of scandium-based double perovskite crystals comprising antimony dopants that can generate multiexcitonic emissions in the ultraviolet, blue, and yellow spectral regions. Owing to zero-dimensional nature crystal lattice minimizes energy crosstalk, different excitonic states be selectively excited by ultraviolet light, X-ray irradiation, mechanical action, enabling dynamic control steady/transient-state features modulating excitation modes. Remarkably, transparent exhibits efficient white photoluminescence (quantum yield >97%), blue emission with long afterglow (duration >9 h), high-brightness self-reproducible violet-blue mechanoluminescence. These findings reveal exceptional capability low-dimensional integrating various luminescence, offering exciting opportunities multi-level data encryption all-in-one authentication technologies.

Language: Английский

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Long-Wavelength Near-Infrared Divalent Nickel-Activated Double-Perovskite Ba₂MgWO₆ Phosphor as Imaging for Human Fingers

ACS Applied Materials & Interfaces, Journal Year: 2023, Volume and Issue: 15(33), P. 39472 - 39479

Published: Aug. 8, 2023

Transmission near-infrared (NIR) imaging technology has great potential for biomedical because of its lower water absorption coefficient and highly reduced photon scattering effect in biological tissues compared to visible light. The extent tissue is inversely proportional wavelength; therefore, principle, with long-wavelength NIR helps improve the resolution optical image, but deep high-resolution luminescence still very challenging technically. Here, we report discovery a Ba2MgWO6:Ni2+ double perovskite phosphor that emits broadband (1200-2000 nm) under 365 nm near-ultraviolet (UV) excitation, full width at half-maximum 255 nm. quantum efficiency optimized composition reached 16.67%. analysis crystal structure suggests Ni2+ ions preferentially occupy W6+ site octahedrons weak field, which leads large Stokes shift. An as-prepared pc-LED device was built by packaging an low-power near-UV-LED chip, tested generate clear venous vessels human fingers. These unique properties makes it promising application field sources body tissue..

Language: Английский

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Free Halogen Substitution of Chiral Hybrid Metal Halides for Activating the Linear and Nonlinear Chiroptical Properties

Journal of the American Chemical Society, Journal Year: 2023, Volume and Issue: 145(49), P. 26833 - 26842

Published: Dec. 1, 2023

Halogen substitution has been proven as an effective approach to the band gap engineering and optoelectronic modulation of organic–inorganic hybrid metal halide (OIHMH) materials. Various high-performance mixed OIHMH film materials have primarily obtained through coordinated halogens in their inorganic octahedra. Herein, we propose a new strategy free halogen outside octahedra for constructing single crystals with chiral structures, resulting boost linear nonlinear chiroptical properties. The from DMA4[InCl6]Cl (DMA = dimethylammonium) DMA4[InCl6]Br facile antisolvent vaporization method produces centimeter-scale high thermal stability along quantum yield photoluminescence, conspicuous circularly polarized luminescence, greatly enhanced second harmonic generation (SHG). In particular, crystal features intrinsic structure, exhibiting significant SHG circular dichroism (SHG-CD) response highest reported anisotropy factor (gSHG-CD) 1.56 among enhancements both properties are directly attributed octahedral distortion. by confine introduced within sites lattice, thereby ensuring compositions successful employment such may broaden horizon regulation structures

Language: Английский

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