Fabrication, tunable fluorescence emission and energy transfer of Tm3+‐Dy3+ co‐activated P2O5–B2O3–SrO–K2O glasses

Cui, Sanchuan; Chen, Guohua; Chen, Yong; Jin, Lufan; Shang, Fei; Xu, Jiwen

doi:10.1111/jace.16770

Cited by 31 publications

(5 citation statements)

References 46 publications

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“…(16) We easily notice that experimental I PL (t) [equation ( 16)] differs from S T (t) [equation (14)] only by the constant C 0 = k RD A 0 , where A 0 is a constant related to the concentration of initially excited donors and some other experimental factors. Since I PL (0) = C 0 we can readily obtain S T (t) from the measured curve.…”

Section: Single Radiative Rate and Distribution Of Non-radiative Ratesmentioning

confidence: 99%

“…This confirms the former conclusion of Sillen [17], who examined similar problem using a different methodology. Here, it should be emphasized that up to now many authors [3,4,6,7,14,[25][26][27][28][29][30] have used equation ( 2) to calculate the average lifetime used in equation (21). Most probably, they followed the definition arbitrarily proposed in the original paper of Inokuti and Hirayama which refers to the 'mean duration' of donor luminescence [23].…”

Section: Single Radiative Rate and Distribution Of Non-radiative Ratesmentioning

confidence: 99%

“…Many of such averaged quantities, characterizing an ensemble of emitters, are calculated based on average lifetime during which collection of emitters remain in their excited states. This includes, for example, the efficiency of energy transfer between lanthanide ions in solids [5,14] or the average absorption cross-section of semiconductor nanocrystals [15,16]. For such materials, excited state of each single emitter can decay with its own characteristic rate and for this reason to characterize a large ensemble of such heterogeneous emitters it is usually necessary to define one macroscopic parameter which describes the average amount of time the whole system spends in the excited state.…”

Section: Introductionmentioning

confidence: 99%

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On the choice of proper average lifetime formula for an ensemble of emitters showing non-single exponential photoluminescence decay

Zatryb

Klak

2020

J. Phys.: Condens. Matter

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In this paper, we investigate non-single exponential photoluminescence decays in various disordered condensed-matter systems. For such materials, two formulas for the average lifetime of system’s excited state are commonly used in the analysis of experimental data. In many cases, the choice of formula is arbitrary and lacks a clear physical justification. For this reason, our main goal is to show that the choice of correct mathematical formula should be based on the interpretation of measured photoluminescence decay curve. It is shown that depending on the investigated system, after appropriate normalization, photoluminescence decay curve can represent either a survival probability function or a probability density function of lifetime and for this reason two different formulas for the average lifetime are required. It is also shown that, depending on luminescence quantum yield, some information on the probability density function of lifetime can be lost in the process of measurement, which results in underestimated values of average lifetime. Finally, we provide an interpretation of total decay rate distributions which are frequently obtained by phenomenological modeling of non-single exponential photoluminescence decays.

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Section: Single Radiative Rate and Distribution Of Non-radiative Ratesmentioning

confidence: 99%

Section: Single Radiative Rate and Distribution Of Non-radiative Ratesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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On the choice of proper average lifetime formula for an ensemble of emitters showing non-single exponential photoluminescence decay

Zatryb

Klak

2020

J. Phys.: Condens. Matter

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“…Among these techniques, the luminescence intensity ratio (LIR) derived from UC luminescence is widely used for non-contact temperature measurements. Traditionally, the LIR technique relies on detecting the thermally coupled two energy levels of rare earth ions [ 7 ], such as the well-known Er 3+ ( 2 H 11/2 , 3 S 3/2 ) [ 12 ] and Tm 3+ ( 3 F 2,3 , 3 H 4 ) [ 13 ]. However, the sensitivity of these sensors is limited by the energy gaps between these pairs of levels [ 14 ].…”

Section: Introductionmentioning

confidence: 99%

Upconversion luminescence and optical thermometry behaviors of Yb3+ and Ho3+ co-doped GYTO crystal

Zhang,

Ding,

Wang

et al. 2023

Front. Optoelectron.

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Optical thermometry based on the upconversion (UC) luminescence intensity ratio (LIR) has attracted considerable attention because of its feasibility for achievement of accurate non-contact temperature measurement. Compared with traditional UC phosphors, optical thermometry based on UC single crystals can achieve faster response and higher sensitivity due to the stability and high thermal conductivity of the single crystals. In this study, a high-quality 5 at% Yb3+ and 1 at% Ho3+ co-doped Gd0.74Y0.2TaO4 single crystal was grown by the Czochralski (Cz) method, and the structure of the as-grown crystal was characterized. Importantly, the UC luminescent properties and optical thermometry behaviors of this crystal were revealed. Under 980 nm wavelength excitation, green and red UC luminescence lines at 550 and 650 nm and corresponding to the 5F4/5S2 → 5I8 and 5F5 → 5I8 transitions of Ho3+, respectively, were observed. The green and red UC emissions involved a two-photon mechanism, as evidenced by the analysis of power-dependent UC emission spectra. The temperature-dependent UC emission spectra were measured in the temperature range of 330–660 K to assess the optical temperature sensing behavior. At 660 K, the maximum relative sensing sensitivity (Sr) was determined to be 0.0037 K−1. These results highlight the significant potential of Yb,Ho:GYTO single crystal for optical temperature sensors. Graphical abstract

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“…For phosphor, the low transmittance and aging of epoxy resin or silicone utilized to cure phosphor hinder its practical application. [ 7–9 ] For scintillating single crystal, the complex synthesis process, high cost, and difficulty to construct tiny array structure impede its application despite the crystal growing and fiber drawing technique has made considerable progress. [ 10–12 ] Therefore it is urgent to develop suitable host of RE ions to achieve both excellent luminescent property and practicality.…”

Section: Introductionmentioning

confidence: 99%

Multicolor Phosphate Glasses for Potential White LED Lighting and X‐Ray Detections

Tian

Shi

Sun

et al. 2022

Laser & Photonics Reviews

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Though widely applied in light-emitting diode (LED) lighting and X-ray detection, respectively, rare-earth ions doped phosphor and scintillating single crystals still face many challenges in practicalities, like aging of package material and difficulty to construct tiny array structure. Using phosphate glass as the host is quite beneficial for solving these problems while enabling distinguished luminescence. Therefore, Eu 3+ and Tb 3+ doped phosphate glasses which, respectively, show strong red/green emissions are researched. Superior thermal stabilities (78.69% and 89.35% emission intensities remain at 150 °C) and high internal quantum efficiencies (87.3% and 68.6%) are found to guarantee the excellent photoluminescence performances. The brilliant X-ray excited luminescence properties are demonstrated by general 19.49% and 34.74% integrated emission intensities of that of commercial Bi 4 Ge 3 O 12 single crystal scintillator with the change of X-ray power. Meanwhile, Tb 3+ doped scintillating fiber is drawn. Finally, excited by 380 nm LED, color manipulation and white light generation are achieved in LEDs with a structure of stacked emitting layers (mainly Eu 3+ and Tb 3+ doped phosphate glasses). Many of the as-constructed white LED's performance parameters are much better than the commercial white LED. These results show that Eu 3+ and Tb 3+ doped phosphate glasses possess promising potential in LED lighting and X-ray detections.

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Fabrication, tunable fluorescence emission and energy transfer of Tm³⁺‐Dy³⁺ co‐activated P₂O₅–B₂O₃–SrO–K₂O glasses

Cited by 31 publications

References 46 publications

On the choice of proper average lifetime formula for an ensemble of emitters showing non-single exponential photoluminescence decay

On the choice of proper average lifetime formula for an ensemble of emitters showing non-single exponential photoluminescence decay

Upconversion luminescence and optical thermometry behaviors of Yb3+ and Ho3+ co-doped GYTO crystal

Multicolor Phosphate Glasses for Potential White LED Lighting and X‐Ray Detections

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