Journal of Rare Earths, Год журнала: 2024, Номер unknown
Опубликована: Июль 1, 2024
Язык: Английский
Ceramics International, Год журнала: 2025, Номер unknown
Опубликована: Янв. 1, 2025
Язык: Английский
Процитировано
0
ACS Applied Optical Materials, Год журнала: 2025, Номер unknown
Опубликована: Фев. 17, 2025
Luminescence thermometry (LT) has emerged as a valuable technique for noncontact temperature sensing, with applications in real-time monitoring, microelectronics thermal management, and health surveillance. In this work, we developed temperature-sensitive material, potassium chloride(KCl):Sb3+, investigated its luminescent properties. The results indicated that the material exhibited broad excitation spectra within 250–400 nm wavelength range maximum at 366 showed band emission 590 upon excitation. Interestingly, demonstrated excellent responsiveness over of 273 to 373 K, which not been observed so far. To explore potential application measurement, utilized fluorescence intensity ratio (FIR) dual bands Sb3+ Tb3+ emissions (ISb/ITb) sensitivity KCl:Sb3+/Tb3+. an exceptional relative ambient temperatures 5.59% K–1 313 K. This study could potentially serve centers luminescence fields.
Язык: Английский
Процитировано
0
Advanced Optical Materials, Год журнала: 2025, Номер unknown
Опубликована: Март 25, 2025
Abstract Double perovskite halides are attracting considerable attention due to their applications in solar cells and photovoltaics. It is observed that many (more than 20) publications top journals have associated spectral features emission the region at 460–470 nm with “pristine” materials. This leads not only false observations but also incorrect conclusions concerning transformation of dark into bright excitons or boosting self‐trapped exciton (STE) emission. The use phrase STE commented upon. Most commonly, spectra present correspond those antimonate (III) ion, Sb 3+ . should be interpreted terms s p – 2 orbital transitions rather excitonic transitions. compounds Cs NaRECl 6 (RE = Y, Gd) synthesized by two major methods, namely: evaporation hydrothermal syntheses, for various rare earth starting materials, order demonstrate effect antimony contamination. Contamination Mn 2+ ion found samples double susceptible attack moisture. study emphasizes need check sample synthesis purity carefully monitor integrity
Язык: Английский
Процитировано
0
Laser & Photonics Review, Год журнала: 2025, Номер unknown
Опубликована: Апрель 25, 2025
Abstract Co‐doping of rare earth (RE) and ns 2 metal ions with in double perovskites shows great promise for applications anti‐counterfeiting, display, radiation detection. However, the intrinsic physical nature enhanced photoluminescence remains unclear. Herein, we use gadolinium‐based perovskite as model propose an effective strategy co‐doping RE3+ Sb3+ (5s ) to modulate energy transfer. The incorporation Sb 3+ increases absorption cross section, thereby overcoming limitation 4f–4f narrowband transitions. Furthermore, acts a bridge transfer, significantly facilitating this process. Density functional theory calculations reveal that introduction disrupts symmetry [RECl 6 ] 3– octahedra, leading increased distortion. Additionally, electrons octahedra exhibit stronger localization /RE co‐doped system, which enhances Cl – –RE charge transfer process, increasing radiative transition rates resulting high quantum yield. Our research elucidates essence luminescence RE‐based from both experimental theoretical perspectives, providing valuable insights into modulation luminescent properties understanding underlying mechanisms RE doped materials.
Язык: Английский
Процитировано
0
Advanced Materials, Год журнала: 2025, Номер unknown
Опубликована: Май 15, 2025
Abstract The development of ultrabroadband light sources spanning the visible (Vis) to near‐infrared (NIR) range is fundamental importance for cutting‐edge applications in communication, metrology, and quantum technologies. Although phosphor‐converted LEDs have extended emission, they still suffer from spectral gaps, inadequate color rendering, constrained NIR output. Here, a promising approach introduced by tailoring multi‐exciton energy transfer pathways realize Vis‐to‐NIR emission Sb 3 ⁺/Ln ⁺ co‐doped vacancy‐ordered Cs₂HfCl₆ perovskite nanocrystals. By systematically optimizing Ln doping concentrations, excitation wavelengths, lanthanide ion selection, between singlet triplet self‐trapped exciton (STE) states levels are modulated. This design facilitates broad tunability through distribution control among centers, improves radiative efficiency reducing losses during processes, promotes stable performance mitigating excessive accumulation. resulting single‐component LED based on ⁺/Pr NCs delivers broadband extending ≈1200 nm, high quality (CRI ∼ 98.1, R9 98), strong visible/NIR PLQY (≈80%), steady operation over 50 h. findings provide insight into engineering low‐dimensional perovskites offer viable route toward emerging solid‐state sources.
Язык: Английский
Процитировано
0
Laser & Photonics Review, Год журнала: 2025, Номер unknown
Опубликована: Май 19, 2025
Abstract Lead‐free halide double perovskites are rapidly gaining prominence as a nontoxic, highly stable, and versatile alternative to traditional lead‐based perovskites, notable for their superior optoelectronic properties. Among these, rare‐earth‐based (RHDPs) notably stand out. Comprising fifteen lanthanide elements with distinctive electron configurations of [Xe] 4f n−1 5d 0−1 6s 2 ( n = 1–15), alongside the group‐IIIB Yttrium (Y) Scandium (Sc), rare‐earth (RE) exhibit great potential. These 17 RE ions (Sc 3+ , Y La –Lu ) offer vast landscape crafting numerous RHDPs, poised properties that surpass diversify beyond current perovskite standards. Key functionality unique luminescence driven by self‐trapped exciton (STE) recombination, 4f→4f 5d→4f transitions, enabling applications in visible infrared light emission through downshifting up‐conversion. This review thoroughly articulates foundational including structural‐property relationships, synthesis methods, optical characteristics, durability. It highlights recent advancements across range fields such near‐infrared emitting diodes (Vis&NIR LEDs), sensors, anti‐counterfeiting technologies. Additionally, discusses prevailing challenges associated RHDP materials applications, offering insights future directions.
Язык: Английский
Процитировано
0
ACS Applied Materials & Interfaces, Год журнала: 2025, Номер unknown
Опубликована: Май 22, 2025
Язык: Английский
Процитировано
0
Journal of Materials Chemistry C, Год журнала: 2024, Номер 12(38), С. 15761 - 15767
Опубликована: Янв. 1, 2024
Sb 3+ /Ln co-doped Cs 2 NaGdCl 6 double perovskite was prepared. The energy transfer relationship between and Tb explored. White phosphors with CIE coordinates of (0.34, 0.33) were obtained by introducing Ho into the :Sb ,Tb .
Язык: Английский
Процитировано
3
Journal of Luminescence, Год журнала: 2024, Номер unknown, С. 120909 - 120909
Опубликована: Сен. 1, 2024
Язык: Английский
Процитировано
3
Angewandte Chemie International Edition, Год журнала: 2024, Номер unknown
Опубликована: Окт. 12, 2024
Abstract Erbium ions are commonly used to extend the photoelectric properties of metal halide perovskites from visible near‐infrared range. However, achieving high‐efficiency multimode luminescence in a single system is difficult due weak absorption associated with forbidden 4 f ‐4 transitions. In this study, unique strategy proposed adjust and enhance second region (NIR‐II) emission Cs 2 NaBiCl 6 by incorporating Fe 3+ ions. The as‐prepared material demonstrates reversible thermochromism, driven strong electron‐phonon coupling effect, exhibits tunable that can be adjusted altering excitation energy temperature. Notably, benefitting charge transfer transition ‐Cl − along influence doping on geometrical electronic structures, blue‐excitable (450 nm) NIR‐II around 1541 nm Er realized for first time, an intensity 16.7 times higher maximum photoluminescence quantum yield (PLQY) 22.5 %. This enhancement enables innovative applications such as two‐dimensional information encryption multi‐channel cooperative responses improved NIR imaging. study highlights potential optimizing perovskites, opening avenues advanced light emitting diodes (LEDs), thermometer, anti‐counterfeiting,
Язык: Английский
Процитировано
2