A zero-thermal-quenching and color-tunable phosphor LuVO4: Bi3+, Eu3+ for NUV LEDs

Zhang, Xinguo; Zhu, Zhenpeng; Guo, Ziying; Mo, Fuwang; Wu, Zhan‐Chao

doi:10.1016/j.dyepig.2018.03.071

Cited by 70 publications

(19 citation statements)

References 22 publications

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“…As mentioned above and as shown in Figure B, antithermal quenching of luminescence from Bi 3+ is observed in BYSO:3%Bi 3+ ,20%Eu 3+ phosphor. Antithermal quenching phenomenon was also reported by M. Y. Peng in LuVO 4 :Bi 3+ phosphor, and Y. Jin in BaY 2 Si 3 O 10 :Bi 3+ ,Eu 3+ phosphor, which is caused by the trapped electrons in defects. The trapped electrons will be depleted from defects with the increase of temperature, then transfer through the conduction band to 3 P 1 excited state of Bi 3+ , and finally induce the increase of Bi 3+ luminescence with the rising temperature from 298 to 423 K. After all traps are exhausted, with the increase of temperature from 423 to 568 K, thermal quenching will be taken place again and result in a decline of the emission intensity.…”

Section: Resultsmentioning

confidence: 55%

“…The bigger Δ E is, the weaker thermal quenching is. According to the Arrhenius equation, Δ E of the luminescence center can be evaluated by

I false(T false) = \frac{I_{0}}{1 + C exp (- Δ E / k T)}

where I 0 is the initial emission intensity (298 K), I ( T ) is the integral emission intensity at different temperatures T , C is a constant, and k is Boltzmann constant (8.629 × 10 −5 eV/K). The relationship of ln( I 0 / I ( T ) −1) vs 1/ kT of Eu 3+ is plotted in Figure C.…”

Section: Resultsmentioning

confidence: 99%

“…Host components play an essential role in luminescence process. Silicate materials are good luminescent hosts for their high physical, chemical stability, and thermal stability . To the best of our knowledge, Bi 3+ and Eu 3+ ‐doped Ba 2 Y 2 Si 4 O 13 (BYSO) phosphors have never been reported.…”

Section: Introductionmentioning

confidence: 99%

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Energy transfer and color‐tunable emission in Ba₂Y₂Si₄O₁₃:Bi³⁺,Eu³⁺ phosphors

et al. 2018

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Single‐composition Ba2Y2Si4O13:Bi3+,Eu3+ (BYSO:Bi3+,Eu3+) phosphors with color‐tunable and white emission were prepared by conventional high temperature solid‐state reaction method. The structural and luminescent properties of these phosphors were thoroughly investigated through X‐ray diffraction, photoluminescence, and decay curves. BYSO:Bi3+ phosphors show two excitation peaks at 342 and 373 nm, and give two emission peaks at 414 and 503 nm, respectively, indicating that there are two sites of Bi3+ in BYSO. The energy transfer from Bi3+ to Eu3+ was investigated in detail. Varied hues from blue (chromaticity coordinate [0.219, 0.350]) to white (0.288, 0.350) and orange‐red light (0.644, 0.341) can be generated by adjusting the content of Eu3+. Pure white light emission (0.311, 0.338) can be obtained under the excitation of 355 nm in BYSO:3%Bi3+,20%Eu3+ phosphor. Besides, BYSO:Bi3+,Eu3+ phosphors exhibit distinct thermal quenching properties, whose emission intensity at 473 K is 82.6% of that at 298 K. Our results indicate that BYSO:Bi3+,Eu3+ may be applied as conversion phosphors for n‐UV‐based W‐LEDs.

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Section: Resultsmentioning

confidence: 55%

“…The bigger Δ E is, the weaker thermal quenching is. According to the Arrhenius equation, Δ E of the luminescence center can be evaluated by

I false(T false) = \frac{I_{0}}{1 + C exp (- Δ E / k T)}

Section: Resultsmentioning

confidence: 99%

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Energy transfer and color‐tunable emission in Ba₂Y₂Si₄O₁₃:Bi³⁺,Eu³⁺ phosphors

et al. 2018

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“…The excitation spectrum of CAZO:Bi 3+ monitored at 410 nm obviously consists of two bands at 258 nm and a maximum around 340 nm attributed to 1 S 0 → 1 P 1 and 1 S 0 → 3 P 2 transitions of Bi 3+ , respectively. [34][35][36] In the emission spectra, only one characteristic broad peak ranging from 380 to 550 nm with the maximum centered at 410 nm ascribed to 3 P 1 → 1 S 0 of Bi 3+ is noticed. The emission band can be disassembled into two sub-bands located at 405 and 450 nm, which correspond to the transitions of excited electrons from excited energy levels 3 P 1 and 3 P 0 respectively to the ground energy level 1 S 0 .…”

Section: Phase Formation and Structure Characteristicsmentioning

confidence: 99%

None‐rare‐earth activated Ca₁₄Al₁₀Zn₆O₃₅:Bi³⁺,Mn⁴⁺ phosphor involving dual luminescent centers for temperature sensing

et al. 2019

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We proposed a new strategy for utilizing rare‐earth–free‐activated self‐referencing optical material with dual activators for temperature sensing, which was synthesized by conventional high‐temperature solid‐state method and was scarcely reported. Originating from the different thermal responses of Mn4+ and Bi3+ ions, a Mn4+/Bi3+‐based dual‐emitting fluorescence intensity ratio (FIR) as dual‐modal temperature signal for temperature sensing has been corroborated as a promising temperature sensing method. Due to the outstanding thermal resistance of activator Mn4+ (anti‐Stokes) benefiting from the unique 3dn electronic configurations and strong field strength of host, together with the energy transfer from Bi3+ to Mn4+ ions and excellent thermal quenching of Bi3+, this temperature‐sensitive phosphor displayed both an extensive detection temperature region ranging from 303 to 563 K and excellent absolute and relative sensitivity of 0.0147 K−1 and 1.21% K−1 respectively, both of which are higher than some foregoing reported optical materials. Furthermore, two well‐separated emission peaks at blue and red regions enabled an excellent signal discriminability and accurate temperature detection under the single‐wavelength excitation of 340 nm. In addition, freedom from rare‐earth ions contributed its possibility to be mass‐produced for meeting the needs of economic rationality, nontoxic and convenient synthesis. It is anticipated that this preliminary study would arouse peoples’ attention on exploring more novel dual activator‐based optical thermometric materials in absence of rare‐earth ions.

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“…In addition, the Bi 3+ ion is a sensitizer, including 1 S 0 → 1 P 1 and 3 P 1 transition in the UV region. Previously, there are relevant literature reported about the Bi 3+ sensitizer, such as LiCa 3 MgV 3 O 12 :Bi 3+ ,Eu 3+ , 11 Ba 9 Lu 2 Si 6 O 24 :Bi 3+ ,Eu 3+ , 12 LuVO 4 :Bi 3+ ,Eu 3+ , 13 and SrY 2 O 4 :Bi 3+ ,Eu 3+ . 14 In addition, we also note that the study of optical temperature measurement by fluorescence intensity ratio (FIR) technology has received great attention.…”

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confidence: 99%

Tunable color emission in LaScO₃:Bi³⁺,Tb³⁺,Eu³⁺ phosphor

et al. 2020

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LaScO3:xBi3+,yTb3+,zEu3+ (x = 0 − 0.04, y = 0 − 0.05, z = 0 − 0.05) phosphors were prepared via high‐temperature solid‐state reaction. Phase identification and crystal structures of the LaScO3:xBi3+,yTb3+,zEu3+ phosphors were investigated by X‐ray diffraction (XRD). Crystal structure of phosphors was analyzed by Rietveld refinement and transmission electron microscopy (TEM). The luminescent performance of these trichromatic phosphors is investigated by diffuse reflection spectra and photoluminescence. The phenomenon of energy transfer from Bi3+ and Tb3+ to Eu3+ in LaScO3:xBi3+,yTb3+,zEu3+ phosphors was investigated. By changing the ratio of x, y, and z, trichromatic can be obtained in the LaScO3 host, including red, green, and blue emission with peak centered at 613, 544, and 428 nm, respectively. Therefore, two kinds of white light‐emitting phosphors were obtained, LaScO3:0.02Bi3+,0.05Tb3+,zEu3+ and LaScO3:0.02Bi3+,0.03Eu3+,yTb3+. The energy transfer was characterized by decay times of the LaScO3:xBi3+, yTb3+, zEu3+ phosphors. Moreover absolute internal QY and CIE chromatic coordinates are shown. The potential optical thermometry application of LaScO3:Bi3+,Eu3+ was based on the temperature sensitivity of the fluorescence intensity ratio (FIR). The maximum Sa and Sr are 0.118 K−1 (at 473.15 K) and 0.795% K−1 (at 448.15 K), respectively. Hence, the LaScO3:Bi3+,Eu3+ phosphor is a good material for optical temperature sensing.

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A zero-thermal-quenching and color-tunable phosphor LuVO4: Bi3+, Eu3+ for NUV LEDs

Cited by 70 publications

References 22 publications

Energy transfer and color‐tunable emission in Ba₂Y₂Si₄O₁₃:Bi³⁺,Eu³⁺ phosphors

Energy transfer and color‐tunable emission in Ba₂Y₂Si₄O₁₃:Bi³⁺,Eu³⁺ phosphors

None‐rare‐earth activated Ca₁₄Al₁₀Zn₆O₃₅:Bi³⁺,Mn⁴⁺ phosphor involving dual luminescent centers for temperature sensing

Tunable color emission in LaScO₃:Bi³⁺,Tb³⁺,Eu³⁺ phosphor

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A zero-thermal-quenching and color-tunable phosphor LuVO4: Bi3+, Eu3+ for NUV LEDs

Cited by 70 publications

References 22 publications

Energy transfer and color‐tunable emission in Ba2Y2Si4O13:Bi3+,Eu3+ phosphors

Energy transfer and color‐tunable emission in Ba2Y2Si4O13:Bi3+,Eu3+ phosphors

None‐rare‐earth activated Ca14Al10Zn6O35:Bi3+,Mn4+ phosphor involving dual luminescent centers for temperature sensing

Tunable color emission in LaScO3:Bi3+,Tb3+,Eu3+ phosphor

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Energy transfer and color‐tunable emission in Ba₂Y₂Si₄O₁₃:Bi³⁺,Eu³⁺ phosphors

Energy transfer and color‐tunable emission in Ba₂Y₂Si₄O₁₃:Bi³⁺,Eu³⁺ phosphors

None‐rare‐earth activated Ca₁₄Al₁₀Zn₆O₃₅:Bi³⁺,Mn⁴⁺ phosphor involving dual luminescent centers for temperature sensing

Tunable color emission in LaScO₃:Bi³⁺,Tb³⁺,Eu³⁺ phosphor