Design of a narrow-band blue-emitting Rb2Ba3(P2O7)2:Eu2+ phosphor with low thermal quenching for plant growth LEDs

Xue, Yali; Liang, Yujun; Wang, Qiangke; Zhang, Weilun; Dou, Yi; Wu, Xiaodeng; Han, Yongsheng

doi:10.1016/j.ceramint.2023.05.026

Cited by 12 publications

(2 citation statements)

References 52 publications

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“…The Rb 0.80 Al 11 O 17 :0.20Eu 2+ sample was composed with Eu 2+ instead of Rb + and produced bright narrow-band blue emission with a peak of 445 nm under excitation from 260 nm to 430 nm, which is attributed to the 4 f 6 5 d 1 – 4 f 7 transition of Eu 2+ ions. 37,38 Being efficiently excitable by the near-ultraviolet band is important for blue-emitting phosphors, and more rarely the excitation band of Rb 0.80 Al 11 O 17 :0.20Eu 2+ spans the 400–420 nm area. This suggests that modified materials with strong UV absorption and small Stokes shifts can be used as blue-emitting compositions in human-centric lighting.…”

Section: Resultsmentioning

confidence: 99%

Highly efficient blue-green dual-narrow-emission in RbAl₁₁O₁₇:Eu²⁺,Mn²⁺ toward wide-color-gamut human-centric backlights

Xue,

Liang,

Zhang

et al. 2024

J. Mater. Chem. C

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Section: Resultsmentioning

confidence: 99%

Highly efficient blue-green dual-narrow-emission in RbAl₁₁O₁₇:Eu²⁺,Mn²⁺ toward wide-color-gamut human-centric backlights

Xue,

Liang,

Zhang

et al. 2024

J. Mater. Chem. C

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“…Despite significant efforts to develop novel phosphors with enhanced thermal stability, the underlying principles governing stable luminescence at high temperatures remain elusive. At the present stage, the mechanism of thermal quenching behavior is usually interpreted by disparate theoretical models, such as the configuration coordinate model, , defect quenching, , energy annihilation caused by energy transfer among different luminescence centers, and thermal ionization. − Consequently, there exists a critical need to delve into the development of novel phosphors that exhibit thermally stable luminescence, potentially illuminating the ambiguous mechanisms underlying thermal quenching.…”

Section: Introductionmentioning

confidence: 99%

Acid Post-Treatment Triggered High-Efficiency Blue-Emitting LiNa₂Sr₈B₁₂O₂₄F₆Cl:Eu²⁺ Phosphors toward Multipurpose LED Applications

Leng,

He,

Zhang

et al. 2024

Ind. Eng. Chem. Res.

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To facilitate the industrial application of phosphorconverted white-light-emitting diodes (pc-WLEDs), it is crucial to overcome the significant challenge of creating high-efficiency, thermally stable blue phosphors. Exploiting the extensive band gap and discrete anionic groups in the compound LiNa 2 Sr 8 B 12 O 24 F 6 Cl, a groundbreaking blue-emitting phosphor designated as a-LNSBOFC:Eu 2+ (acid-treated LiNa 2 Sr 8 B 12 O 24 F 6 Cl:Eu 2+ ) has been developed. This phosphor was synthesized through a meticulous solid-state reaction followed by an acid post-treatment process, setting a new benchmark in the field. Moreover, the acid post-treatment process can remove the impurities and surface defects from the phosphor, resulting in simultaneous enhancements in both luminescence intensity (approximately 1.4 times) and quantum efficiency (79% → 90%). The a-LNSBOFC:Eu 2+ blue phosphor demonstrates remarkable thermal stability, retaining 89% efficiency at 150 °C, and maintains superior chromaticity (Δx = 0.0039, Δy = 0.0075) within the temperature range of 25−150 °C, with color consistency varying minimally between 2.2 × 10 −3 and 1.7 × 10 −2 . Its ability to resist thermal quenching predominantly originates from the substantial 5.67 eV band gap of the host matrix, which efficiently curtails thermal ionization. Crucially, prototype WLED devices employing this blue phosphor produce high-quality warm white light (CCT = 3958 K and R a = 90) and achieve 72% of the NTSC color space according to the CIE 1931 standards. This advancement heralds a promising direction for the development of efficient and thermally robust blue phosphors tailored to LED technologies. The a-LNSBOFC:Eu 2+ phosphor reported here shows great foreground and potentiality to be a next-generation blue emitter for near-ultraviolet excited high-quality warm white WLEDs and backlights in liquid-crystal display technology.

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In Situ Glass Crystallization Enables Narrowband Blue Luminescence for Full‐Spectrum Lighting and Transparent Display

Li,

Feng,

You

et al. 2023

Advanced Optical Materials

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Currently, narrowband light‐convertor is critically urgent for preeminent color representation in lighting and display fields, however, the development of target materials still remains challenging. Herein, glass ceramic (GC) composite based on in situ glass crystallization, where the condense glass network structure acts as effective obstructors for long distance ion diffusion, is elaborately designed to inhibit activators’ multi‐sites occupation for acquiring narrowband emitting. Following this strategy, an unprecedented narrowband blue emission of Eu2+‐activators with a peak at 447 nm and full‐width of half maximum (FWHM) of ≈30 nm is developed in a new type of Sr5(PO4)3Cl (SPOCl) GC composite. The Eu2+‐activators’ hindered diffusion inside the GC composite makes preferential and limit occupation of the [Sr1O9] sites, enabling narrowband blue luminescence. Furthermore, the GC composite highlights remarkable performance in high‐power violet‐excitable full‐spectrum lighting and transparent display (TD) prototype fields, due to its high color purity (≈98.1%), photoluminescence quantum field (PLQY, ≈80.5%) and thermal stability (≈82.1%@150 °C). This work not only promotes the profound understanding of the relationship between light manipulation and glass crystallization, but also paves the way toward the implementation of high‐quality lighting and display of GC composites.

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Design of a narrow-band blue-emitting Rb2Ba3(P2O7)2:Eu2+ phosphor with low thermal quenching for plant growth LEDs

Cited by 12 publications

References 52 publications

Highly efficient blue-green dual-narrow-emission in RbAl₁₁O₁₇:Eu²⁺,Mn²⁺ toward wide-color-gamut human-centric backlights

Highly efficient blue-green dual-narrow-emission in RbAl₁₁O₁₇:Eu²⁺,Mn²⁺ toward wide-color-gamut human-centric backlights

Acid Post-Treatment Triggered High-Efficiency Blue-Emitting LiNa₂Sr₈B₁₂O₂₄F₆Cl:Eu²⁺ Phosphors toward Multipurpose LED Applications

In Situ Glass Crystallization Enables Narrowband Blue Luminescence for Full‐Spectrum Lighting and Transparent Display

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Design of a narrow-band blue-emitting Rb2Ba3(P2O7)2:Eu2+ phosphor with low thermal quenching for plant growth LEDs

Cited by 12 publications

References 52 publications

Highly efficient blue-green dual-narrow-emission in RbAl11O17:Eu2+,Mn2+ toward wide-color-gamut human-centric backlights

Highly efficient blue-green dual-narrow-emission in RbAl11O17:Eu2+,Mn2+ toward wide-color-gamut human-centric backlights

Acid Post-Treatment Triggered High-Efficiency Blue-Emitting LiNa2Sr8B12O24F6Cl:Eu2+ Phosphors toward Multipurpose LED Applications

In Situ Glass Crystallization Enables Narrowband Blue Luminescence for Full‐Spectrum Lighting and Transparent Display

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Highly efficient blue-green dual-narrow-emission in RbAl₁₁O₁₇:Eu²⁺,Mn²⁺ toward wide-color-gamut human-centric backlights

Highly efficient blue-green dual-narrow-emission in RbAl₁₁O₁₇:Eu²⁺,Mn²⁺ toward wide-color-gamut human-centric backlights

Acid Post-Treatment Triggered High-Efficiency Blue-Emitting LiNa₂Sr₈B₁₂O₂₄F₆Cl:Eu²⁺ Phosphors toward Multipurpose LED Applications