Journal of Materials Chemistry C, Journal Year: 2024, Volume and Issue: 12(31), P. 11778 - 11784
Published: Jan. 1, 2024
Cs 2 NaRECl 6 (RE = Tb, Eu) NCs with multicolor emissions under different light excitation have great potential in anticounterfeiting and LEDs.
Language: Английский
Advanced Materials, Journal Year: 2024, Volume and Issue: 36(21)
Published: Feb. 21, 2024
Near-Infrared (NIR) light emitting metal halides are emerging as a new generation of optical materials owing to their appealing features, which include low-cost synthesis, solution processability, and adjustable properties. NIR-emitting perovskite-based light-emitting diodes (LEDs) have reached an external quantum efficiency (EQE) over 20% device stability 10,000 h. Such results sparked interest in exploring NIR halide emitters. In this review, several different types halides, including lead/tin bromide/iodide perovskites, lanthanide ions doped/based double low dimensional hybrid Bi
Language: Английский
Citations
51
Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(44)
Published: May 22, 2024
Abstract The double perovskite material of Cs 2 NaRECl 6 ‐type, utilizing rare‐earth (RE) ions as trivalent element, has attracted widespread interest due to its unique optoelectronic properties and wide range applications. It displays rich optical properties, including visible infrared light emission through down‐shifting, well up‐conversion radiation‐induced emission. These exceptional make it a promising for devices such detectors, light‐emitting diodes, lasers energy storage batteries but also show advantages in anti‐counterfeiting technology imaging. In this article, the latest progress is reported challenges crystal structure, preparation, performance, various applications lead‐free halide (HLDPs) compounds. This outline prospective research directions existing materials, with aim facilitating discovery new HLDPs materials.
Language: Английский
Citations
23
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
Citations
4
Advanced Optical Materials, Journal Year: 2025, Volume and Issue: unknown
Published: Jan. 8, 2025
Abstract In this study, heterostructured nanoparticles based on lanthanide double perovskite halide are innovatively proposed, which dramatically improved quantum yield and color purity, but the problem of water stability materials has also been solved. The without surface ligands have excellent optical properties when dispersed in water, higher purity than those organic solvents. Besides, application potential is demonstrated practical performance verified by preparing luminescent ink. This study provides a new strategy for enhancement prospect perovskite.
Language: Английский
Citations
2
Aggregate, Journal Year: 2024, Volume and Issue: 5(5)
Published: April 12, 2024
Abstract The exceptional optoelectronic properties of lead halide perovskite nanocrystals (PeNCs) in the ultraviolet and visible spectral regions have positioned them as a promising class semiconductor materials for diverse photovoltaic applications. However, their limited response to near‐infrared (NIR) light due intrinsic bandgap (>1.5 eV) has hindered applications many advanced technologies. To circumvent this limitation, it is fundamental significance integrate PeNCs with lanthanide‐doped upconversion nanoparticles (UCNPs) that are capable efficiently converting low‐energy NIR photons into high‐energy photons. By leveraging energy transfer from UCNPs PeNCs, synergistic combination can not only expand responsivity range but also introduce novel emission profiles luminescence multi‐dimensional tunability (e.g., wavelength, lifetime, polarization) under low‐to‐medium power irradiation, which breaks through inherent restrictions individual thereby opens up new opportunities device engineering. In review, we focus on latest advancements development PeNCs‐UCNPs nanocomposites, an emphasis controlled synthesis optical design such full‐spectrum solar cells, photodetectors, multilevel anticounterfeiting. Some future efforts prospects toward active research field envisioned.
Language: Английский
Citations
15
EcoMat, Journal Year: 2024, Volume and Issue: 6(3)
Published: Jan. 25, 2024
Abstract Herein, we synthesized Cr 3+ /Ln (Er , Tm )‐codoped rare earth‐based Cs 2 NaScCl 6 double perovskite, and the near‐infrared emission of Ln can be excited by visible light through energy transfer (ET) from to . Moreover, there are two independent bands, which stems 4 T → A transition (970 nm) f‐f (1542 nm for Er 1220 ), respectively. Particularly, both compounds have ultra‐high photoluminescence quantum yield (PLQY) 60% 10%Cr /6%Er ‐codoped emission: ∼26%) 68% /4.5%Tm (Tm ∼56%), attributed ET efficiency similar ionic activity Sc allowing more dopants enter host lattice. Considering excellent stability samples, demonstrated /Tm in applications imaging night vision. Finally, reported /9%Er ‐tridoped further applied it optical thermometry. image
Language: Английский
Citations
12
Inorganic Chemistry Frontiers, Journal Year: 2024, Volume and Issue: 11(9), P. 2784 - 2797
Published: Jan. 1, 2024
By adjusting the phonon energy of host crystal (Ca 2+ /Sr /Ba ) LaLiTeO 6 :Yb 3+ , Tm phosphor, combined with cross-relaxation phenomenon, a high-sensitivity thermometer for dual-mode temperature measurement was constructed.
Language: Английский
Citations
9
Small, Journal Year: 2024, Volume and Issue: 20(35)
Published: April 29, 2024
Abstract Rare‐earth halide double perovskites (DPs) have attracted extensive attention due to their excellent optoelectronic performance. However, the correlation between luminescence performance, crystal structure, and temperature, as well inherent energy transfer mechanism, is not understood. Herein, Lanthanide ions (Ln 3+ : Nd or Dy ) co‐dopants are incorporated into Sb doped Cs 2 NaYbCl 6 DPs construct (ET) models reveal effects of temperature levels rare earth on ET. The different excited state structures ‐Ln at temperatures relative positions synergistically determine physical processes luminescence. These multi‐mode luminescent materials exhibit good performance in anti‐counterfeiting, NIR imaging, sensing. This work provides new insights mechanism related photophysical process.
Language: Английский
Citations
9
Advanced Optical Materials, Journal Year: 2025, Volume and Issue: unknown
Published: Jan. 8, 2025
Abstract The ever‐increasing counterfeiting issues have triggered a research upsurge in multi‐modal fluorescence anti‐counterfeiting materials. All inorganic metal halide double perovskites possess the advantages of facile preparation procedures and high thermal stability, which also provide suitable doping sites to regulate emission behavior highlight potential for serving as Herein, series Sb 3+ , Er Yb solely or codoped Cs 2 NaLuCl 6 are successfully prepared, optical properties dependent on ratio lanthanide ions (Ln ). Notably, due participation energy‐transfer cross‐relaxation processes, tri‐doped (0.3%Sb ‐20%Er ‐50%Yb ‐Cs ) shows luminescence responses excitation sources with different photon energies, is employed construct patterns by combining . Besides behavior, NIR from can be used night‐vision device. Remarkably, 20%Er ‐doped an excellent light yield 30767 photons MeV −1 low limit detection (LoD) 108 nGy s highlighting X‐ray imaging. This work provides rational route design multi‐functional materials that anti‐counterfeiting, night vision,
Language: Английский
Citations
1
Advanced Optical Materials, Journal Year: 2025, Volume and Issue: unknown
Published: March 20, 2025
Abstract Luminescence intensity decreasing with rising temperature is a common phenomenon called thermal quenching. However, the Bi 3+ ‐Eu co‐doped NaGd 2 Ga 3 Ge O 12 (NGGG) phosphor exhibits antithermal quenching luminescence of Eu . has pair thermally coupled energy levels (TCLs), where higher level P 1 and lower derived from metal‐to‐metal charge‐transfer (MMCT). As concentration increases, lifetime decreases, while MMCT remains unchanged. It means that transfer (ET) only happens between Interestingly, excited, emission still observed. This because when exciting level, as upper TCLs, can also be which consequently leads to Accordingly, ⁺ will increased show coupling process enhanced temperature. Taking advantage unique ET ⁺, ⁺‐Eu NGGG demonstrates sensitivity 2.08% K − ¹ at 500 K, distinct most fluorescence thermometers maximum low temperatures.
Language: Английский
Citations
1