Luminescent properties and energy transfer behavior between Tm3+ and Dy3+ ions in co-doped phosphate glasses for white LEDs

Chen, Guohua; Yao, Leqi; Zhong, Hai-ji; Cui, Sanchuan

doi:10.1016/j.jlumin.2016.05.034

Cited by 35 publications

(6 citation statements)

References 26 publications

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“…The emission spectrum recorded under excitation at wavelength of 357 nm exhibited a strong emission peak centered at 455 nm and a weak emission band at 478 nm, corresponding to the 1 D 2 fi 3 F 4 and 1 G 4 fi 3 H 6 transition, respectively. 23 The emission mechanism for the Tm 3+ ions in the Ca 2 Al 2 SiO 7 phase is presented in the partial energy level diagram shown in Fig. 8.…”

Section: Resultsmentioning

confidence: 99%

Energy Transfer Behavior and Color-Tunable Properties of Ca2Al2SiO7:RE3+ (RE3+ = Tm3+, Dy3+, Tm3+/Dy3+) for White-Emitting Phosphors

Abudouwufu

Sambasivam

Wan

et al. 2018

Journal of Elec Materi

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Tm 3+ /Dy 3+-codoped Ca 2 Al 2 SiO 7 phosphors have been synthesized using a high-temperature solid-state reaction method. The crystal structure, x-ray diffraction patterns, and photoluminescence (PL) properties of the rare-earth (RE) ions, and energy transfer (ET) processes between RE ions, were investigated in detail. The quenching concentration of Tm 3+ and Dy 3+ singly doped in Ca 2 Al 2 SiO 7 was determined to be 0.006 mol and 0.02 mol, respectively. Under excitation at 357 nm, Ca 2 Al 2 SiO 7 :Tm 3+ phosphors showed emission lines of Tm 3+ corresponding to 1 D 2 fi 3 F 4 and 1 G 4 fi 3 H 6 transitions. Efficient ET from Tm 3+ to Dy 3+ ions was observed, leading to color-tunable emissions of Ca 2 Al 2 SiO 7 :0.006Tm 3+ ,xDy 3+ (x = 0 mol to 0.02 mol) phosphors. Theoretical calculations revealed that the efficiency of the ET gradually increased with increase in the Dy 3+ ion concentration, reaching a maximum of $ 42.1% at Tm 3+ ion concentration of 0.006 mol. Furthermore, at 473 K, the quantum efficiency was calculated to be 79.8% at room temperature, confirming the good thermal stability of the Ca 2 Al 2 SiO 7 :0.006Tm 3+ ,xDy 3+ phosphors.

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Section: Resultsmentioning

confidence: 99%

Energy Transfer Behavior and Color-Tunable Properties of Ca2Al2SiO7:RE3+ (RE3+ = Tm3+, Dy3+, Tm3+/Dy3+) for White-Emitting Phosphors

Abudouwufu

Sambasivam

Wan

et al. 2018

Journal of Elec Materi

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“…At this point, blue-emitting Tm 3+ ions as a result of the 1 G 4 → 3 H 6 transitions are incorporated to glasses together with Dy 3+ ions to properly adjust the Y/B ratio and realize white light emission by increasing color purity. White light generation through Dy 3+ /Tm 3+ co-doped glasses have been investigated and reported in different glass matrices such as, alumino-borosilicate [102], oxyfluoride-germanate [103], tungsten-borate [104], zinc strontium phosphate [105], and lanthanum-phosphate [106].…”

Section: Dy 3+mentioning

confidence: 99%

“…For example, Chen et al reported that Dy 3+ and Tm 3+ co-doped zinc strontium phosphate glasses can display white light emission with superior CIE color coordinates (x = 0.332, y = 0.320) under 353 nm excitation by adjusting the concentrations of dopant ions [105]. The PL spectra of Dy 3+ and Tm 3+ co-doped glasses excited under 353 nm and 16(a)).…”

Section: Dy 3+ /Tmmentioning

confidence: 99%

Recent progress in lanthanide-doped luminescent glasses for solid-state lighting applications—a review

Erol

Vahedigharehchopogh

Kıbrıslı

et al. 2021

J. Phys.: Condens. Matter

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Nowadays, solid-state white light-emitting diodes (wLEDs) have attracted remarkable attention for applications in general lighting, displays and numerous electronical devices due to their eminent efficiency, longer lifetime and higher mechanical durability compared to traditional incandescent and fluorescent lights. In current commercial wLEDs, a combination of Y 3 Al 5 O 12 :Ce 3+ yellow phosphor with blue LED chip and epoxy resin is generally used to generate white light. However, there are some considerable frailties mostly originated from phosphor and resin such as, degradation upon heat, and moisture, inhomogeneous spectral distribution, and poor color rendering capability. Therefore, phosphor embedded glass-ceramics have been developed as a promising way to obtain durable solid-state lighting devices. However, in these methods, there is a greater risk of reactions between the phosphor material and the glass host. At this point, lanthanide-doped luminescent glasses have drawn great attention as a new generation phosphor and/or epoxy free white-light-emitting source owing to their favorable properties including high thermal and chemical stability, high transparency, and easy manufacturing process. This review article aims to comprehensively summarize the recent progress in singly (i.e., Dy 3+ , Eu 2+ ), doubly (i.e.

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“…Therefore, it is necessary to explore new glass systems for optical thermometry. Recently, our group has been studying the fluorescence property and optical thermometry of phosphate‐based glass and GCs 15,20‐23 . Through glass composition design and process adjustment, transparent GCs containing oxoapatite type Sr 10 (PO 4 ) 6 O nanocrystals (NCs) were achieved in the phosphate glass.…”

Section: Introductionmentioning

confidence: 99%

“…Recently, our group has been studying the fluorescence property and optical thermometry of phosphate-based glass and GCs. 15,[20][21][22][23] Through glass composition design and process adjustment, transparent GCs containing oxoapatite type Sr 10 (PO 4 ) 6 O nanocrystals (NCs) were achieved in the phosphate glass. Xia et al reported that the rare-earth-metal oxoapatite was appropriate as a host of luminescent materials owing to its rigid crystal structure, excellent thermal, mechanical, and chemical properties.…”

mentioning

confidence: 99%

Enhanced up‐conversion luminescence and optical thermometry characteristics of Er³⁺/Yb³⁺ co‐doped Sr₁₀(PO₄)₆O transparent glass‐ceramics

Cui

Chen

2020

J Am Ceram Soc

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In this paper, the Yb 3+ /Er 3+ co-doped parent glass (PG) with composition (in mol%) of 30P 2 O 5-10B 2 O 3-38SrO-22K 2 O and transparent glass-ceramics (GCs) containing hexagonal Sr 10 (PO 4) 6 O nanocrystals (NCs) were synthesized for the first time by melt-quenching method and subsequent heating treatment in air. Under 980 nm laser prompting, the GCs samples showed intense red and green up-conversion emissions compared to those characteristics for the PG sample. The emission intensities varied with Er 3+ concentration and heat treatment conditions. Furthermore, in Yb 3+ /Er 3+ co-doped GCs specimens, the optical thermometry was researched by means of fluorescence intensity ratio (FIR) of 4 S 3/2 and 2 H 11/2 levels. The GC sample heated at 620°C for 5 hours possessed a high relative temperature sensitivity (S r) of 0.769% K −1 at 303 K and the maximal absolute temperature sensitivity (S a) of 5.951 × 10 −3 K −1 at 663 K, respectively. It is expected that the as-fabricated GC materials with Sr 10 (PO 4) 6 O NCs are promising efficient up-conversion materials for optical temperature sensor.

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Luminescent properties and energy transfer behavior between Tm3+ and Dy3+ ions in co-doped phosphate glasses for white LEDs

Cited by 35 publications

References 26 publications

Energy Transfer Behavior and Color-Tunable Properties of Ca2Al2SiO7:RE3+ (RE3+ = Tm3+, Dy3+, Tm3+/Dy3+) for White-Emitting Phosphors

Energy Transfer Behavior and Color-Tunable Properties of Ca2Al2SiO7:RE3+ (RE3+ = Tm3+, Dy3+, Tm3+/Dy3+) for White-Emitting Phosphors

Recent progress in lanthanide-doped luminescent glasses for solid-state lighting applications—a review

Enhanced up‐conversion luminescence and optical thermometry characteristics of Er³⁺/Yb³⁺ co‐doped Sr₁₀(PO₄)₆O transparent glass‐ceramics

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Luminescent properties and energy transfer behavior between Tm3+ and Dy3+ ions in co-doped phosphate glasses for white LEDs

Cited by 35 publications

References 26 publications

Energy Transfer Behavior and Color-Tunable Properties of Ca2Al2SiO7:RE3+ (RE3+ = Tm3+, Dy3+, Tm3+/Dy3+) for White-Emitting Phosphors

Energy Transfer Behavior and Color-Tunable Properties of Ca2Al2SiO7:RE3+ (RE3+ = Tm3+, Dy3+, Tm3+/Dy3+) for White-Emitting Phosphors

Recent progress in lanthanide-doped luminescent glasses for solid-state lighting applications—a review

Enhanced up‐conversion luminescence and optical thermometry characteristics of Er3+/Yb3+ co‐doped Sr10(PO4)6O transparent glass‐ceramics

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Enhanced up‐conversion luminescence and optical thermometry characteristics of Er³⁺/Yb³⁺ co‐doped Sr₁₀(PO₄)₆O transparent glass‐ceramics