Role of Yb3+ ion on the evaluation of energy transfer and cross-relaxation processes in Gd2Ce2O7: Yb3+, Er3+ phosphors

Wu, Youfusheng; Lai, Fengqin; Liang, Tongxiang; Qiang, Yaochun; Huang, Jingyu; Ye, Xinyu; You, Weixiong

doi:10.1016/j.jlumin.2019.03.021

Cited by 14 publications

(4 citation statements)

References 54 publications

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“…The shortening of the luminescence decay time measured at a wavelength of 1030 nm, with increased concentrations of Yb 3+ ions was also observed by Wu et al [59] in the Gd 2 Ce 2 O 7 : Yb 3+ , Er 3+ phosphors for 980 nm excitation. As the cross relaxation CR1 process depends on the Yb 3+ ion concentration and becomes more efficient with increasing Yb 3+ ion concentration, the decreased CR1 probability in higher Yb 3+ ion concentration doped samples may be due to the reverse CR1 process, i.e.…”

Section: Resultssupporting

confidence: 73%

Structural, optical and magnetic properties of Y_3−0.02−xEr_0.02Yb _x Al₅O₁₂ (0 < x < 0.20) nanocrystals: effect of Yb content

Kamińska

Jankowski²,

Sikora

et al. 2020

Nanotechnology

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The paramagnetic Y3−0.02−x Er0.02Yb x Al5O12 (x = 0.02, 0.06, 0.10, 0.12, 0.18, 0.20) nanocrystals (NCs) were synthesized by the microwave-induced solution combustion method. The XRD, TEM and SEM techniques were applied to determine the NCs’ structures and sizes. The XRD patterns confirmed that the NCs have for the most part a regular structure of the Y3Al5O12 (YAG) phase. The changes of the distance between donor Yb3+ (sensitizer) and acceptor Er3+ (activator) were realized by changing the donor’s concentration with a constant amount of acceptor. Under 980 nm excitation, at room temperature, the NCs exhibited strong red emission near 660 and 675 nm, and green upconversion emission at 550 nm, corresponding to the intra 4f transitions of Er3+ (4F9/2, 2H11/2, 4S3/2) → Er3+ (4I15/2). The strongest emission was observed in a sample containing 18% Yb3+ ions. The red and green emission intensities are respectively about 5 and 12 times higher as compared to NCs doped with 2% of Yb3+. In order to prove that the main factor responsible for the increase of the upconversion luminescence efficiency is reduction of the distance between Yb3+ and Er3+, we examined, for the first time the influence of hydrostatic pressure on luminescence and luminescence decay time of the radiative transitions inside donor ion. The decrease of both luminescence intensity and luminescence decay times, with increasing hydrostatic pressure was observed. After applying hydrostatic pressure to samples with e.g. 2% and 6% Yb3+, the distance between the donor and acceptor decreases. However, for higher concentrations of the donor, this distance is smaller, and this leads to the effective energy transfer to Er3+ ions. With increasing pressure, the maximum intensity of near infrared emission is observed at 1029, 1038 and 1047 nm, what corresponds to 2F5/2 → 2F7/2 transition of Yb3+.

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Section: Resultssupporting

confidence: 73%

Structural, optical and magnetic properties of Y_3−0.02−xEr_0.02Yb _x Al₅O₁₂ (0 < x < 0.20) nanocrystals: effect of Yb content

Kamińska

Jankowski²,

Sikora

et al. 2020

Nanotechnology

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“…S8(a). 28 In unsaturated state, the slopes of three emission peaks at 524, 544 and 662 nm are 1.80 ± 0.06, 1.70 ± 0.01 and 1.59 ± 0.02, respectively, which demonstrate expressly that two green emissions at 524 and 544 nm and one red emission at 662 nm are ascribed to the double photon processes. 29,30 However, the n values become 1.16 ± 0.05, 1.03 ± 0.05 and 1.05 ± 0.04 corresponding to these 524, 544 and 662 nm emissions, respectively.…”

Section: Resultsmentioning

confidence: 85%

Two-Step Synthesis, Upconversion Properties and Temperature Sensing Behavior of CaTiSiO₅:Er³⁺/Yb³⁺ Phosphors

Wu¹,

Xu²,

Xiao³

et al. 2019

ECS J. Solid State Sci. Technol.

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Oxide upconversion (UC) materials show great potential for temperature detection application due to its excellent thermostability. The CaTiSiO5 (CTS) host with excellent physicochemical properties is difficult to be prepared owing to the emergence of stable CaTiO3 phase. Herein, we focus on the synthesis of pure CTS phase and the investigation of UC properties of Er3+ and Er3+ - Yb3+ doped CTS phosphors. Three diverse routes are adopted toward the synthesis of pure CTS phase, which demonstrates that shielding the Ca2+ in crystal lattice is vital for achieving this target. The optimal calcined temperature at 1270°C is confirmed by XRD, morphology change and EDX results. UC properties of color-emitting, optimal Er3+/Yb3+ concentrations as well as temperature behavior are revealed. The CTS:1%Er3+/1%Yb3+ phosphor with bright green and red emissions is obtained and low Er3+/Yb3+ dopant concentrations are caused by the unequal substitutions between Er3+/Yb3+ and Ca2+ ions. High SA value as well as its maximal value of 52.3 × 10−4 K−1 coupled with the SR of 46.3 × 10−4 K−1 at 413 K are gained and the SA value with small fluctuation were achieved in the CTS:1%Er3+/1%Yb3+ sample. These results suggest that the CTS:1%Er3+/1%Yb3+ may be a candidate for temperature detection application.

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“…Rich luminous colors are obtained on the basis of different Ln 3+ and their doping contents. To date, diverse cross‐relaxation (CR) and energy back transfer (EBT) processes between the same or various Ln 3+ are proved, including but not limited to (CR1) 4 S 3/2 (Er 3+ ) + 4 I 13/2 (Er 3+ ) → 4 F 9/2 (Er 3+ ) + 4 I 11/2 (Er 3+ ), [ 54 ] (EBT1) 4 S 3/2 (Er 3+ ) + 2 F 7/2 (Yb 3+ ) → 4 I 13/2 (Er 3+ ) + 2 F 5/2 (Yb 3+ ) , [ 81 ] (CR2) 4 F 7/2 (Er 3+ ) + 4 I 11/2 (Er 3+ ) → 4 F 9/2 (Er 3+ ) + 4 F 9/2 (Er 3+ ), [ 82 ] (CR3) 1 G 4 (Tm 3+ ) + 3 F 4 (Tm 3+ ) → 3 F 2,3 (Tm 3+ ) + 3 H 4 (Tm 3+ ), [ 83 ] (CR4) 5 F 4 , 5 S 2 (Ho 3+ ) + 5 I 8 (Ho 3+ ) → 5 I 4 (Ho 3+ ) + 5 I 7 (Ho 3+ ), [ 84 ] and (CR5) 1 G 4 (Tm 3+ ) + 4 I 15/2 (Er 3+ ) → 3 F 4 (Tm 3+ ) + 4 F 9/2 (Er 3+ ). [ 85 ] Due to the influence of these complex energy transfer processes, UCL outputs would be manipulated in different doping systems.…”

Section: Inorganic Ucl Materialsmentioning

confidence: 99%

Combinations of Superior Inorganic Phosphors for Level‐Tunable Information Hiding and Encoding

2021

Advanced Optical Materials

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Inorganic photoluminescence (PL) phosphors (including upconversion (UC), down‐shifting (DS), and persistent (PersL) materials) with tunable outputs, high quantum yields (QYs), and excellent photostability have attracted tremendous attention in advanced information hiding and encoding (IHE). The three kinds of phosphors endow security patterns in different IHE levels owing to their unique optical features. For security applications, it is very necessary to review how to boost optical performance and achieve multi‐level anti‐counterfeiting. Herein, diversely pivotal approaches on the achievement of multicolor emissions, high QYs, and excellent photostability are summarized. Full learning of these methods is promising to design superior inorganic phosphors. Based on the appealing optical properties of inorganic PL materials, a progressively improved IHE level is revealed by using unitary inorganic PL material, the couples of UCL, DS, and PersL, and further combinations together with external stimuli. This review not only deepens an understanding of designing high‐performance inorganic PL phosphors, but also gets inside into the construction of high‐performance IHE.

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Role of Yb3+ ion on the evaluation of energy transfer and cross-relaxation processes in Gd2Ce2O7: Yb3+, Er3+ phosphors

Cited by 14 publications

References 54 publications

Structural, optical and magnetic properties of Y_3−0.02−xEr_0.02Yb _x Al₅O₁₂ (0 < x < 0.20) nanocrystals: effect of Yb content

Structural, optical and magnetic properties of Y_3−0.02−xEr_0.02Yb _x Al₅O₁₂ (0 < x < 0.20) nanocrystals: effect of Yb content

Two-Step Synthesis, Upconversion Properties and Temperature Sensing Behavior of CaTiSiO₅:Er³⁺/Yb³⁺ Phosphors

Combinations of Superior Inorganic Phosphors for Level‐Tunable Information Hiding and Encoding

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Role of Yb3+ ion on the evaluation of energy transfer and cross-relaxation processes in Gd2Ce2O7: Yb3+, Er3+ phosphors

Cited by 14 publications

References 54 publications

Structural, optical and magnetic properties of Y3−0.02−xEr0.02Yb x Al5O12 (0 < x < 0.20) nanocrystals: effect of Yb content

Structural, optical and magnetic properties of Y3−0.02−xEr0.02Yb x Al5O12 (0 < x < 0.20) nanocrystals: effect of Yb content

Two-Step Synthesis, Upconversion Properties and Temperature Sensing Behavior of CaTiSiO5:Er3+/Yb3+ Phosphors

Combinations of Superior Inorganic Phosphors for Level‐Tunable Information Hiding and Encoding

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Structural, optical and magnetic properties of Y_3−0.02−xEr_0.02Yb _x Al₅O₁₂ (0 < x < 0.20) nanocrystals: effect of Yb content

Structural, optical and magnetic properties of Y_3−0.02−xEr_0.02Yb _x Al₅O₁₂ (0 < x < 0.20) nanocrystals: effect of Yb content

Two-Step Synthesis, Upconversion Properties and Temperature Sensing Behavior of CaTiSiO₅:Er³⁺/Yb³⁺ Phosphors