Unlocking the multifunctional applications of a novel bismuth-activated high-brightness orange-emitting phosphor through lattice engineering

Chemical Engineering Journal, Год журнала: 2025, Номер unknown, С. 159228 - 159228

Опубликована: Янв. 1, 2025

Язык: Английский

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Mn–Mn Dimers Induced Multimode Emitters in Mn²⁺-Activated AZn₄(PO₄)₃ (A = K, Rb, and Cs) with Unique [Zn₄PO₁₂] Chains and [ZnO_n] Groups

Inorganic Chemistry, Год журнала: 2025, Номер unknown

Опубликована: Янв. 23, 2025

Mn2+-doped luminescent materials play a significant role in variety of fields, including modern lighting, displays, and imaging. Mn2+ exhibits broad adjustable emission, hinging on the local environment crystal field interaction 3d5 electrons. However, it is still challenge to realize precise control emission ions due site-prior occupation specific lattice. Here, formation Mn–Mn dimers proposed be an effective strategy design novel red emission. Multimode emitters Mn2+-activated AZn4(PO4)3 (A = K, Rb, Cs) with unique [Zn4PO12] chains [ZnOn] groups are observed achieve regular green unusual emissions. KZn4(PO4)3:Mn2+ shows dual emissions at 542 608 nm, attributed [MnO4] [Mn2O7] dimers, respectively. While K replaced Rb Cs, Zn form [ZnO4] tetrahedra [ZnO5] octahedra. RbZn4(PO4)3:Mn2+ 618 ascribing [Mn2O8] dimers. CsZn4(PO4)3:Mn2+ also displays orange-red 608–620 nm increasing doping levels, deriving from energy transfer [MnO5] This work provides framework for creating materials.

Язык: Английский

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Blue/blue–violet‐emitting phosphate phosphors for full‐spectrum white light‐emitting diodes

Journal of the American Ceramic Society, Год журнала: 2025, Номер unknown

Опубликована: Фев. 22, 2025

Abstract Violet light, a component of sunlight, is critical for human health, but it usually ignored in classic white light‐emitting diodes (LEDs) that are fabricated by pumping green, yellow, or red phosphors blue LEDs. To realized full‐spectrum LEDs healthy lighting, required to replace near‐ultraviolet (n‐UV) violet pump multi‐color phosphors. Herein, we reported and/or blue–violet Na 3 KMg 7 P 6 O 24 :Eu 2+ (NKMPO:Eu ) and K 1– y Sr Mg 7– Li (NKSMLPO:Eu can be efficiently excited n‐UV The NKSMLPO:Eu phosphor ( = 0.1), showing small thermal quenching, had photoluminescence quantum yield 64.9% 41.2% under 365 405 nm excitation, respectively. Full‐spectrum were obtained combining with the blue/blue–violet‐emitting other commercial phosphors, which show correlated color temperature 4285–4705 maximal rendering index 98.4. It confirms adopted as light filler producing sunlight‐like

Язык: Английский

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Designing a high-efficiency broadband cyan phosphor for low-blue full-spectrum LED lighting

Journal of Alloys and Compounds, Год журнала: 2024, Номер unknown, С. 176579 - 176579

Опубликована: Сен. 1, 2024

Язык: Английский

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Absolutely Structural Disorder Boosting Bandwidth toward Full‐Spectrum White Light from Single Occupancy of Activator

Advanced Materials, Год журнала: 2024, Номер unknown

Опубликована: Окт. 11, 2024

Abstract Achieving single‐phase full‐spectrum white light (SFWL) phosphors is a central goal in the optical field because they simplify white‐LEDs assembly and avoid long‐term color instability. Despite many approaches are developed, current SFWL still suffer from chromaticity drift due to inconsistent thermal quenching of multiple emitting centers. Herein, an absolutely structural disorder strategy established develop single‐emitting center‐based phosphor. Precisely controlling flux added induces translation ordered Y 0.75 Ta 0.25 O 1.75 :Bi 3+ disordered 0.785 0.215 1.715 , as directly identified by STEM‐HAADF analyses. Structural enables produce with FWHM 6194 cm −1 (175 nm) employing single activator site, 1352 increase compared cyan‐emitting despite Bi occupies two lattice positions. This SFWL, coupled minimal expansion unit cell inapparent spectral overlap excitation emission bands, ensure zero‐chromaticity shift elevated temperature. A prototype using luminescent layer generates warm without perceptible CIE coordinates under various currents or after extremely continuous operation. work highlights potential designing exceptional stability.

Язык: Английский

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KBaScSi₃O₉:Eu²⁺ Glass‐Ceramics as Single‐Phase High‐Power White Emitters

Advanced Functional Materials, Год журнала: 2024, Номер unknown

Опубликована: Ноя. 28, 2024

Abstract Single‐phase white‐light emitters in the lighting technology overcome challenges of re‐absorption and color shift. However, achieving broadband white emission single‐phase phosphor remains a challenge. Here, crystallized KBaScSi 3 O 9 :Eu 2+ (KBSSO:Eu ) glass‐ceramics (GC) with abundant cationic sites have been developed an ultra‐broad band ranging from 460 to 800 nm found, which asymmetric green is ascribed Eu ions [KO 8 ] [BaO 7 polyhedra, while red centered at 620 originated [ScO 6 sites. The optimized GC‐converted LED (WLED) exhibits high rendering index ( R = 89.8) low correlated temperature (CCT 4241 K). Moreover, encapsulant‐free GCc‐WLED can operate continuously under drive currents. This work paves way for design future development high‐power light sources.

Язык: Английский

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Tailoring of Blue‐Cyan Luminescence in Rb₃Y[(P_1‐xSi_x)O₄]₂:Eu²⁺ Phosphor via Si⁴⁺‐P⁵⁺ Heterovalent Substitution for Full‐Spectrum Healthy Lighting

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

Опубликована: Март 8, 2025

Abstract Filling the cyan gap (470–500 nm) in white light‐emitting diodes (WLEDs) is crucial for full‐spectrum illumination. However, traditional approach of adding phosphor to red, green, and blue phosphors can lead reabsorption color aberrations due spectral overlap varying degradation rates among mixed phosphors. Herein, a blue‐cyan‐emitting (λ em = 475 developed through Si 4+ ‐P 5+ heterovalent substitution blue‐violet‐emitting Rb 3 Y(PO 4 ) 2 :Eu 2+ 425 nm), which serve as component WLEDs fill without extra phosphor. Initially, Eu primarily occupy Rb2O 12 sites (426 , with minimal occupation Rb1O 7 (456 YO 6 (522 nm). The results red‐shift @Rb1 emission peak from 456 nm preferred Rb1 by synergistically achieving blue‐cyan luminescence. Employing instead significantly improves rendering index 90 97.2, thus enhancing overall reproduction quality. This research demonstrates facile composition modification method modulate properties inorganic luminescent materials provides an alternative solution healthy lighting.

Язык: Английский

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Single‐Grain High‐Efficiency Full‐Visible‐Spectrum White Emitters

Angewandte Chemie, Год журнала: 2025, Номер unknown

Опубликована: Март 11, 2025

Abstract Full‐visible‐spectrum emission phosphors are promising candidates for next‐generation white light‐emitting diodes (WLEDs), overcoming the complex and high costs of traditional mixed phosphors. However, their practical application is hindered by low luminescence efficiency. In this regard, a generalization strategy developed that involves creating heterostructure interfaces to prevent detrimental energy transfer processes, thereby boosting The SrLiPO 4 /Sr 9 MgLi(PO ) 7 :Eu 2+ single‐grain prepared in work have achieved remarkable full‐visible‐spectrum efficiency, with record internal external quantum efficiencies 76.1% 56.2%, respectively. WLEDs encapsulated phosphor feature color rendering index (≈93.9), correlated temperature (≈3100 K), stable performance, indicating as‐synthesized excellent healthy lighting. This innovation expected accelerate development technology inspires creation more efficient versatile luminescent materials future.

Язык: Английский

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Organic-phosphate hybrids with colorful persistent luminescence

Chemical Engineering Journal, Год журнала: 2025, Номер unknown, С. 161969 - 161969

Опубликована: Март 1, 2025

Язык: Английский

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Multiple Applications of Sr8znin(1- M )Lu M (Po4)7:Eu2+/Mn2+ Through Thermal Stability Adjustment, Spectral Tuning, and Resonance Energy Transfer

Опубликована: Янв. 1, 2025

Язык: Английский

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