Rare‐Earth‐Based Lead‐Free Halide Double Perovskites for Light Emission: Recent Advances and Applications

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

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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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Tuneable Efficient White Emission of Sb³⁺/Mn²⁺ Co-Doped Lead-Free Perovskites for Single-Component White Light-Emitting Diodes

ACS Applied Materials & Interfaces, Journal Year: 2024, Volume and Issue: 16(15), P. 19175 - 19183

Published: April 4, 2024

Inorganic lead-free perovskite nanocrystals (NCs) with broadband self-trapped exciton (STEs) emission and low toxicity have shown enormous application prospects in the field of display lighting. However, white light-emitting diodes (WLEDs) based on a single-component material high photoluminescence quantum yield (PLQY) remain challenging. Here, we demonstrate novel codoping strategy by introducing Sb3+/Mn2+ ions to achieve tuneable dual Cs3InCl6 NCs. The PLQY increases 59.64% after doping Sb3+. codoped NCs exhibit efficient light due energy transfer channel from STEs Mn2+ 51.38%. Density functional theory (DFT) calculations been used verify deeply effects doping. WLEDs Sb3+/Mn2+-codoped are explored color rendering index 85.5 coordinate (0.398, 0.445), which successfully applied as photodetector lighting sources. This work provides new perspective for designing perovskites WLEDs.

Language: Английский

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Achieving high-sensitivity dual-mode optical thermometry via phonon-assisted cross-relaxation in a double-perovskite structured up-conversion phosphor

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

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Tailoring the Emission Properties of Cs₂NaLuCl₆ for Anti‐Counterfeiting, X‐Ray Scintillation, and Night Vision Applications

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

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Synergistic Integration of Halide Perovskite and Rare‐Earth Ions toward Photonics

Advanced Materials, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 13, 2025

Abstract Halide perovskites (HPs), emerging as a noteworthy class of semiconductors, hold great promise for an array optoelectronic applications, including anti‐counterfeiting, light‐emitting diodes (LEDs), solar cells (SCs), and photodetectors, primarily due to their large absorption cross section, high fluorescence efficiency, tunable emission spectrum within the visible region, tolerance lattice defects, well adaptability solution‐based fabrication processes. Unlike luminescent HPs with band‐edge emission, trivalent rare‐earth (RE) ions typically emit low‐energy light through intra‐4f optical transitions, characterized by narrow spectra long lifetimes. When fused, cooperative interactions between REs endow resulting binary composites not only properties inherited from parent materials but also introduce new attributes unattainable either component alone. This review begins fundamental characteristics REs, followed particular focus on impact electronic structures associated energy transfer The advanced synthesis methods utilized prepare HPs, RE‐doped compounds, are overviewed. Furthermore, potential applications summarized across diverse domains, high‐fidelity anticounterfeiting, bioimaging, LEDs, photovoltaics, photodetection, photocatalysis, conclude remaining challenges future research prospects.

Language: Английский

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Realization of Antithermal Quenching of Eu³⁺ for High‐Sensitivity Luminescence Thermometry via an Indirect Energy Transfer Route

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

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Highly Efficient and Stable Narrow Band Green Emitting Phosphor of Sb³⁺/Ce³⁺ Sensitized Cs₂NaTbCl₆ for WLED

Laser & Photonics Review, Journal Year: 2024, Volume and Issue: unknown

Published: Aug. 30, 2024

Abstract Realizing narrow‐band green phosphors with high efficiency and thermal stability remains an enormous challenge for light‐emitting diodes (LEDs) backlighting in the pursuit of wide‐gamut display. Inspired by excellent characteristic sharp line emission rare‐earth ion Tb 3+ , rare‐earth‐based halide double perovskite Cs 2 NaTbCl 6 phosphor line‐shape (FWHM: ≈7 nm) at 547 nm is developed. The introduction sensitizers Ce or Sb enhanced quantum yield to 76% 90% from 52% due strong absorption sensitizer efficient energy transfer . without express better than traditional perovskite, which originated phonon assistance, low ionization probability, stronger localization 4f electrons through spectrum, first‐principles calculation. warm white LED fabricated using present emitting exhibits color temperature 3081 K ≈100% NTSC gamut, indicates that sensitized possess great application potential WLED illumination display fields.

Language: Английский

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Cation‐Doped Cs₂B^IB^IIIX₆ Double Perovskites: Electronic Structures, Optical Properties, and Optoelectronic Applications

Advanced Optical Materials, Journal Year: 2024, Volume and Issue: 12(30)

Published: Aug. 13, 2024

Abstract Recently, all‐inorganic halide double perovskites (DPs) with a chemical formula of Cs 2 B I III X 6 have been emerging as shinning star to be used in modern optoelectronic devices, due their unique advantages such environmentally friendly, high absorption coefficient, low trap densities, tunable bandgap, variable constituent elements and valences states through or sites engineering. In this review, first, the impact cation doping on electronic structure optical properties DPs are systematically overviewed, which cover several key issues including interconversion between direct indirect band gaps, enhancement light absorption, promotion exciton localization, elucidation energy transfer mechanisms, regulation defect density improvement both stability luminescence efficiency. Subsequently, state‐of‐the‐art research activities regarding interesting device applications discussed, light‐emitting diodes, anticounterfeiting encryption, X‐ray scintillators, thermometry. Finally, existing difficulties, prospects, directions field proposed.

Language: Английский

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Sb3+/Sm3+ co-doped Cs2NaGdCl6 double perovskite: a promising candidate for the singel-component based WLED lighting with high qualtiy

Ceramics International, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 1, 2025

Language: Английский

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