Non-concentration quenching and energy transfer enhanced green emission in Ca8SrGd(PO4)7:Eu2+,Tb3+ for near-UV white LEDs with a high color rendering index

Wang, Shaoyu; Lyu, Zeyu; Li, Zheng; Wang, Lixuan; Wang, Jianghui; Sun, DeGui; Tan, Taixing; Shen, Sida; You, Hongpeng

doi:10.1039/d3tc01717f

Cited by 7 publications

(3 citation statements)

References 47 publications

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“…Through the G. Blasse theory, the green emission is attributed to tetrahedrally coordinated Mn 2+ with a weak crystal field, while the orange and red emission results from octahedrally coordinated Mn 2+ in a strong crystal field. 50 Thus, the 4 T 1 (4G)– 6 A 1 (6S) energy level transition of Mn 2+ at the [AlO 4 ] tetrahedron leads to the green emission of RbAl 10.70 O 17 :0.30Mn 2+ with a weak crystal field. The Poisson expression indicates that the emission bandwidth is strongly related to the electro-phonon interactions.…”

Section: Resultsmentioning

confidence: 96%

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: 96%

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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“…Furthermore, the mechanism of the energy transfer was analyzed. On the basis of the Dexter's multipole interaction energy transfer formula and Reisfeld approximation, [ 22,23 ] the energy transfer from the Cr 3+ to Yb 3+ ions was found to be the dipole–quadrupole interaction (Figure S11, Supporting Information), When the mechanism of energy transfer is a dipole–quadrupole interaction, the efficiency is inversely proportional to the eighth square of the distance. [ 12,24 ] This shows that distance has a huge influence on energy transfer efficiency and plays a dominant role in energy transfer efficiency.…”

Section: Resultsmentioning

confidence: 99%

Tailoring the Cr³⁺ Emission via Combinatorial Management of Crystal‐Field and Energy Transfer for Multiple NIR LEDs

Wang,

Lyu,

Sun

et al. 2024

Advanced Optical Materials

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Near‐infrared (NIR) phosphors converted light‐emitting diodes (NIR pc‐LEDs) are ideal NIR sources for versatile applications, which imply the practical significance in tailoring the emission of the NIR phosphors to enhance the performance for specific application. Herein, a paradigm of tailoring the emissions in a series of Cr3+‐doped phosphors to match the applications in NIR lighting, detection, and short‐wave infrared sources through combinatorial management of crystal‐field and energy transfer is presented. The emission band largely increases from 84 to 190 nm when the introduction of [MgO6]‐[GeO4] into Y3Ga5O12:0.08Cr3+ forms Y3MgxGa5‐2xGexO12:0.08Cr3+ through the substitution of [GaO6]‐[GaO4]. Such a large increase in width makes it suitable for near‐infrared lighting to near‐infrared detection. Moreover, the Yb3+, Nd3+ and Er3+ are doped to construct energy transfer with Cr3+, broadening the emission infrared region and enhanced thermal stability. An optimized Yb3+ emission dominates Y3Ga5O12:0.4Cr3+,Yb3+ phosphor has excellent thermal stability (129%@423 K) and is suitable for high‐power short‐wave infrared sources. The presented work not only provides a series of well‐performed NIR phosphors, but only lights up the avenue for designing the Cr3+ emission for specific application.

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“…Phosphor-converted white light-emitting diodes (pc-WLEDs) are widely used in lighting applications due to the advantages of high efficiency, long operating lifetime, and compact size. , Nowadays, the common combination is to coat the yellow phosphor Y 3 Al 5 O 12 :Ce 3+ (YAG:Ce 3+ ) with some red phosphor on the blue LED chip, which has the disadvantages of low color rendering index and injurious blue light leakage. , The other combination is to coat a variety of phosphors on near-ultraviolet (n-UV) LED chips, such as blue BaMgAl 10 O 17 :Eu 2+ (BAM:Eu 2+ ) phosphor, green (Ba,Sr) 2 SiO 4 :Eu 2+ phosphor, and red (Ca,Sr)AlSiN 3 :Eu 2+ phosphor . In this scenario, there are more phosphors need be applied; consequently, phosphors with high thermal stability and luminescent efficiency are in urge demand.…”

Section: Introductionmentioning

confidence: 99%

Well-Performed Green Phosphor BaY₄Si₅O₁₇:Ce³⁺,Tb³⁺ with High Quantum Efficiency and Thermal Stability

Huang,

Lyu,

Shen

et al. 2024

Inorg. Chem.

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For Tb 3+ -doped green phosphors, the energy transfer from Ce 3+ to Tb 3+ can largely enhance the absorption of excitation; however, obtaining phosphors that exhibit both high quantum efficiency and thermal stability continues to pose a significant challenge. Herein, we established a paradigm to achieve novel silicate BaY 4 Si 5 O 17 (BYSO):Ce 3+ ,Tb 3+ . The near-ultraviolet light efficiently excites the BYSO:Ce 3+ material, causing it to emit light at a wavelength of 408 nm. The photoluminescence of BYSO:0.12Ce 3+ exhibits a relatively small Stokes shift and a thermal stability of 89.8% of the 303 K emission intensity at 423 K (89.8%@423 K). The energy transfer (ET) from Ce 3+ to Tb 3+ ions can be readily constructed in BYSO:Ce 3+ ,Tb 3+ utilizing the overlap between the Ce 3+ emission and the Tb 3+ excitation. The ET efficiency from the Ce 3+ to Tb 3+ ions reached 83.8% at y = 1.2 and a maximum of 94.6%. Finally, the optimized phosphor BYSO:0.12Ce 3+ ,1.2Tb 3+ had an internal quantum efficiency of 94.4% and had excellent thermal stability (96.1%@423 K). Our work pointed out the avenue to novel green phosphors with high efficiency and thermal stability by choosing appropriate host and construct efficient ET.

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Non-concentration quenching and energy transfer enhanced green emission in Ca₈SrGd(PO₄)₇:Eu²⁺,Tb³⁺ for near-UV white LEDs with a high color rendering index

Abstract: Compared with the well-studied energy transfer from Ce3+ to Tb3+, the energy transfer from Eu2+ to Tb3+ has the advantage of high doping concentration of Tb3+, because Eu2+ and Tb3+...

Cited by 7 publications

References 47 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

Tailoring the Cr³⁺ Emission via Combinatorial Management of Crystal‐Field and Energy Transfer for Multiple NIR LEDs

Well-Performed Green Phosphor BaY₄Si₅O₁₇:Ce³⁺,Tb³⁺ with High Quantum Efficiency and Thermal Stability

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Non-concentration quenching and energy transfer enhanced green emission in Ca8SrGd(PO4)7:Eu2+,Tb3+ for near-UV white LEDs with a high color rendering index

Abstract: Compared with the well-studied energy transfer from Ce3+ to Tb3+, the energy transfer from Eu2+ to Tb3+ has the advantage of high doping concentration of Tb3+, because Eu2+ and Tb3+...

Cited by 7 publications

References 47 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

Tailoring the Cr3+ Emission via Combinatorial Management of Crystal‐Field and Energy Transfer for Multiple NIR LEDs

Well-Performed Green Phosphor BaY4Si5O17:Ce3+,Tb3+ with High Quantum Efficiency and Thermal Stability

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Non-concentration quenching and energy transfer enhanced green emission in Ca₈SrGd(PO₄)₇:Eu²⁺,Tb³⁺ for near-UV white LEDs with a high color rendering index

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

Tailoring the Cr³⁺ Emission via Combinatorial Management of Crystal‐Field and Energy Transfer for Multiple NIR LEDs

Well-Performed Green Phosphor BaY₄Si₅O₁₇:Ce³⁺,Tb³⁺ with High Quantum Efficiency and Thermal Stability