Unusual Temperature-Dependent Photoluminescence Due to Competing Excited-State Energy Transfer in Rare Earth Double Perovskites

The Journal of Physical Chemistry Letters, Год журнала: 2025, Номер 16(2), С. 544 - 552

Опубликована: Янв. 6, 2025

Lead-free halide double perovskites (DPs) have become a research hotspot in the field of photoelectrons due to their unique optical properties and flexible compositional tuning. However, luminescence DPs exhibits thermal quenching at high temperatures, which severely affects further application. Herein, we synthesized rare earth Dy3+ transition metal Mn2+ codoped Cs2NaYCl6 characterized using temperature-dependent photoluminescence spectra time-resolved decay profiles different temperatures. The Mn2+-Dy3+:Cs2NaYCl6 exhibit stronger with increasing temperature, attributed antithermal quenching. successful incorporation Mn dopants lattice results suppression nonradiative recombination, more efficient energy transfer (ET) Dy3+, reduced distortion. These kinds near-infrared promising prospects applications such as night vision, radiation detection, solid-state lighting, temperature measurement.

Язык: Английский

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Stimuli-responsive luminescence in doped inorganic crystals

Applied Physics Letters, Год журнала: 2025, Номер 126(13)

Опубликована: Март 1, 2025

Inorganic crystals doped with luminescent ions have attracted considerable interest due to their abundant luminescence spectra. Particularly, these materials can show highly variable in response external stimuli, rendering widespread applications ranging from super-resolution techniques high-security information encryption. In this Perspective, we highlight the recent developments of controlling optical inorganic under various including light, temperature, water/humidity, and mechanical force. Moreover, delve into underlying mechanism discuss relevant applications, simultaneously pointing out challenges future directions for designing superior stimuli-responsive materials.

Язык: Английский

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Tunable Emission In Cs2NaGdCl6: Sb3+, Sm3+ Double Perovskite For Cool White LEDs And Anti-counterfeiting Applications

Journal of Alloys and Compounds, Год журнала: 2025, Номер unknown, С. 180269 - 180269

Опубликована: Апрель 1, 2025

Язык: Английский

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Novel rare-earth doped Cs2NaGdCl6:Sb3+ double perovskite nanocrystals toward good ability of color tuning with high quantum efficiency

The Journal of Chemical Physics, Год журнала: 2025, Номер 162(16)

Опубликована: Апрель 22, 2025

All-inorganic halide double perovskites have attracted extensive attention as new luminescent materials owing to their high luminous efficiency and wide emission spectrum. In this work, blue-red bicolor Cs2NaGdCl6 (CNGC) perovskite nanocrystals doped with Sb3+/Ho3+ were prepared using a hydrothermal method. The incorporation of Sb3+ significantly enhanced the intrinsic “self-trapped excitons (STEs)” wide-band bright blue centered at 470 nm. On basis, different concentrations Ho3+ introduced achieve color tunable from red region, extremely quantum efficiencies 96.53% 92.17%, respectively. By use diverse methods, including spectroscopic analysis fluorescence lifetime, mechanism efficient luminescence related dopant was comprehensively explored. Results show that not only can enhance STEs CNGC but also has an activation effect on rare earth ion Ho3+, because it plays role bridge for two energy transfer channels between centers, details investigated. Thermal stabilities studied over temperature range 303–473 K good performances demonstrated fact PL intensities CNGC:1%Sb3+ CNGC:1%Sb3+/10%Ho3+ 423 75.1% 70.1% compared those 303 K, With CNGC:1%Sb3+/10Ho3+ used, UV light-emitting diode activated devices fabricated characterized. emissions suggest materials’ prominent potential in application plant lighting. Finally, white-light sole matrix, strategy tri-doping Tb3+ proposed based principle three primary colors. device fabrication CNGC:1%Sb3+/10%Ho3+/2.5%Tb3+ sample characterization processes prove its feasibility then provide valuable insights design Sb ion-doped lead-free toward easily which be applied various fields.

Язык: Английский

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Co-doping of Sb³⁺/Ln³⁺ in the Cs₂NaGdCl₆ perovskite leads to efficient energy transfer and single-host white light emission

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

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Activate Reconstruction from Sb³⁺/Ho³⁺ Synergistic Doping Nanofibers for Interactive Information Encryption and Customized Display

Laser & Photonics Review, Год журнала: 2025, Номер unknown

Опубликована: Фев. 12, 2025

Abstract Driven by the escalating demand for cutting‐edge materials in interactive encryption and customized display, optimization of excitonic coupling mechanisms perovskite‐based luminescent systems has emerged as a pivotal focus advanced research. Inspired synergistic doping (SD), photoswitchable energy transfer channel is realized utilizing UV‐responsive Cs 2 NaInCl 6 : Sb 3+ ‐Ho (CNIC: Sb‐Ho) phosphor. Benefiting from self‐trapped exciton , visible blue luminescence Ho achieves excitation reconstruction through SD, with sensitization coefficient to CNIC reaching two orders magnitude. Notably, CNIC: Sb‐Ho quantum dot embedded into polyacrylonitrile (PAN) polymethyl methacrylate (PMMA) fibers, respectively, distinct color coordinate channels are created altering concentration fiber matrix, thereby enabling personalization customization desired colors enhanced precision. Furthermore, excellent read‐in performance under UV irradiation achieved screen‐printing microcrystal on nanofibers combining it ACSII code, which endows UV‐induced controllable shape programming behavior multidimensional information encryption. This work establishes an visual interaction framework effectively integrating perovskite fluorescence tunability nanofiber adaptive structures, thus opening new possibilities smart application next‐generation optical technology.

Язык: Английский

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Design of dual-mode optical temperature sensing in single-component white light emission Bi3+/Sb3+/Ho3+ tri-doped Cs2Ag0.2Na0.8LuCl6 double perovskites

Journal of Rare Earths, Год журнала: 2025, Номер unknown

Опубликована: Фев. 1, 2025

Язык: Английский

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Ultra broadband emission toward white LED based on dysprosium double perovskites CsxRb3-xDyCl6-xIx

Chemical Engineering Journal, Год журнала: 2025, Номер unknown, С. 161517 - 161517

Опубликована: Март 1, 2025

Язык: Английский

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Symmetry Disruption and Charge Localization: Unraveling Roles of Sb³⁺ in Enhancing Luminescence of Rare Earth Double Perovskites

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

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Lead‐Free Rare‐Earth Based Halide Double Perovskites: From Fundamentals, Progress to Perspectives

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

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