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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Large energy gap between singlet and triplet states is no longer a problem: intermediate charge transfer state boosts overall quantum yield up to 67% in Eu3+ complexes

Rare Metals, Journal Year: 2025, Volume and Issue: unknown

Published: March 14, 2025

Language: Английский

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Eu2+ Induced Crystal Field Modulation and Luminescence Enhancement in Ca9Ga(PO4)7:Zn2+,Cr3+

Journal of Luminescence, Journal Year: 2025, Volume and Issue: unknown, P. 121129 - 121129

Published: Feb. 1, 2025

Language: Английский

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Tunable Luminescence and Temperature Sensing in Tb3+ mono-doped Mg3Gd2Ge3O12 Phosphor with High Quantum Yield

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

Published: Feb. 1, 2025

Language: Английский

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Bi3+ doped Sr3Y2(BO3)4 phosphors for full-spectrum WLEDs and temperature sensing

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

Published: March 1, 2025

Language: Английский

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A heat-resistant red-emitting K6Bi13(PO4)15:Sm3+,Eu3+ phosphor toward high color rendering LED lights

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

Published: April 1, 2025

Language: Английский

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Color‐tunable emissions and multi‐mode optical thermometer in Mg₃Gd₂Ge₃O₁₂: Tb³⁺, Eu³⁺ phosphors

Journal of the American Ceramic Society, Journal Year: 2025, Volume and Issue: unknown

Published: June 4, 2025

Abstract A series of Mg 3 Gd 2 Ge O 12 phosphors co‐doped with Tb 3+ and Eu was produced using a solid‐state method. The doped solely have blue emission (383 nm) green (544 nm), the addition can produce red (610 nm). transformation green‐orange could be achieved by adjusting doping amount because energy transfer (ET) from to . ET process attributed dipole−dipole interaction. In addition, intensities three levels lifetimes 5 D decrease increasing temperature, color changes are produced. According these interesting phenomena, an optical thermometer different modes designed utilizing fluorescence intensity ratio (FIR) lifetime (FL) model. maximum values relative sensitivity ( S r ) were found 1.24% K −1 at 494 (FIR = I 383 /I 610 ), 0.43% 423 544 1.38% ms 465 (FL). temperature sensing performance sample demonstrates good repeatability through cyclic testing. above results demonstrate that : , samples potential materials for visual measurement.

Language: Английский

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Energy transfer from the [WO₆]⁶⁻ group to Er³⁺ in Lu₂WO₆ and favorable optical thermometry with strong emission color variability

New Journal of Chemistry, Journal Year: 2024, Volume and Issue: 48(44), P. 18890 - 18899

Published: Jan. 1, 2024

Non-contact optical temperature measurement has attracted intense attention in recent years due to its advantages of high speed and safety.

Language: Английский

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