Preparation and fluorescence properties of Yb3+ and Er3+ co-doped GdAlO3 phosphors

Liu, Yonghao; Tong, Xin; Lai, Fengqin; Chen, Xianzhi; You, Weixiong

doi:10.1016/j.physb.2011.01.015

Cited by 16 publications

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“…The GdAlO 3 :1%Er 3+ ,2%Yb 3+ phosphor prepared by coprecipitation showed much higher green emission intensity than the others, while the phosphor with the same composition prepared by the sol-gel method which had more residual CO 3 2− and OH − species gave the lowest intensity of green emission along with the largest ratio of red-to-green emission. Meanwhile, the ratio of red-to-green emission of the GdAlO 3 :1%Er 3+ ,2%Yb 3+ phosphor we prepared by calcining the sol-gel precursor at 1200 • C was 0.384, significantly smaller than the corresponding value reported by Liu et al (larger than unity) who prepared the GdAlO 3 :Er 3+ ,Yb 3+ phosphors by calcining the sol-gel precursor at 1100 • C, 27,28 indicating that the concentration of OH − and CO 3 2− species in the phosphor is quite important in determining the UCPL intensity and the ratio of red-to-green emission for a given host, because high-energy vibrations of these species could quench the metastable excited states of Er 3+ ion. 30 It is generally accepted that the content of residual OH − or CO 3 2− species in oxide and oxysalt phosphors like GdAlO 3 could be controlled to a certain extent by changing the calcination temperature and/or duration when using the wet-chemically prepared precursor, which enlightens us that the UCPL performance of the oxidic phosphors like GdAlO 3 :Er,Yb may be influenced regularly by the calcination conditions.…”

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confidence: 70%

“…• C, 27,28 indicating that the concentration of OH − and CO 3 2− species in the phosphor is quite important in determining the UCPL intensity and the ratio of red-to-green emission for a given host, because high-energy vibrations of these species could quench the metastable excited states of Er 3+ ion. 30 It is generally accepted that the content of residual OH − or CO 3 2− species in oxide and oxysalt phosphors like GdAlO 3 could be controlled to a certain extent by changing the calcination temperature and/or duration when using the wet-chemically prepared precursor, which enlightens us that the UCPL performance of the oxidic phosphors like GdAlO 3 :Er,Yb may be influenced regularly by the calcination conditions.…”

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confidence: 99%

“…26 Liu et al and Zhu et al recently reported the effect of doping concentration of Yb 3+ and Er 3+ on the structure and fluorescence properties of the sol-gel prepared GdAlO 3 :Er 3+ ,Yb 3+ phosphor. 27,28 In our previous work, the physical and upconversion properties of GdAlO 3 :Er 3+ ,Yb 3+ phosphors prepared by coprecipitation, sol-gel and solid-state reactions were investigated. 29 It was found that the GdAlO 3 :Er 3+ ,Yb 3+ phosphors prepared by different methods showed unlike morphologies and particle sizes, which led to distinct absorption strengths for 980 nm radiation.…”

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Effect of Calcination Temperature on Up-Conversion Photoluminescence of the GdAlO₃: Er³⁺,Yb³⁺Phosphor

Deng

Yan

2014

ECS J. Solid State Sci. Technol.

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GdAlO 3 :1.5%Er 3+ ,8%Yb 3+ phosphors were prepared by calcining the precipitate precursor at different temperatures. Effects of calcination temperature on the phase composition, morphology, light absorption and up-conversion photoluminescence properties of the phosphors were investigated. It was found that the phosphors prepared at a temperature between 1000 and 1400 • C kept perovskite structure. With increasing calcination temperature, the crystallinity of the phosphor improved along with the increased particle size. The absorption at 977 nm increased while the concentration of residual OH − decreased with increasing calcination temperature. Under 980 nm excitation, the intensity of green emission at a wavelength of 546 nm increased nearly linearly with increasing calcination temperature when the calcination temperature of the phosphor was between 1000 and 1300 • C, accompanied by gradually decreased ratio of red-to-green emission. Based on the FT-IR spectra and energy levels of Er 3+ and Yb 3+ , possible reasons causing changes in green emission intensity and the ratio of red-to-green with the calcination temperature of the phosphor were discussed. The nearly linear response of the red-to-green emission ratio of the GdAlO 3 :Er 3+ ,Yb 3+ phosphor to the calcination temperature at which it endured during preparation makes the precipitate precursor GdAlO 3 :Er 3+ ,Yb 3+ to be a promising candidate for upconversion thermal history sensing material. In recent years, frequency up-conversion materials that convert infrared to visible light have attracted much attention for their potential applicability in many fields, such as solid-state lasers, biological fluorescence labels, fiber-optic amplifiers, and photovoltaic devices. 1−4Most of the up-conversion photoluminescence (UCPL) materials that have been extensively studied are rare-earth doped halides, oxyhalides and glasses.1,5−6 Although the conversion efficiency of the fluoridebased UCPL materials has been improved to a considerable level, the application is still greatly restricted because of high production cost and poor chemical stability. Therefore, it is of great significance to seek for new hosts with high-conversion efficiency. It is well established that suitable host material for UCPL should have low intrinsic phonon energy because the phonons (or lattice vibration) of the host can provide non-radiative decay ways to suppress UCPL. 29 It was found that the GdAlO 3 :Er 3+ ,Yb 3+ phosphors prepared by different methods showed unlike morphologies and particle sizes, which led to distinct absorption strengths for 980 nm radiation. Moreover, the concentration of residual CO 3 2− and OH − species in the GdAlO 3 :Er 3+ ,Yb 3+ phosphors prepared by different methods was quite different. Since vibrational frequencies of these species were significantly higher than that of GdAlO 3 host, the existence of these species resulted in multi-phonon non-radiative relaxation of the excited states of Er 3+ ion. Therefore, green UCPL intensity and the z E-mail: sryan@fuda...

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Effect of Calcination Temperature on Up-Conversion Photoluminescence of the GdAlO₃: Er³⁺,Yb³⁺Phosphor

Deng

Yan

2014

ECS J. Solid State Sci. Technol.

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“…Among rare‐earth perovskites, GdAP:Yb,Er, [ 394 ] LaAP:Yb,Er, [ 395 ] YAP:Yb,Er, [ 396 ] YAP:Sm, etc. find mention.…”

Section: Aluminate Phosphors For Applicationsmentioning

confidence: 99%

“…The UC mechanism involves a two-photon process. [393] Among rare-earth perovskites, GdAP:Yb,Er, [394] LaAP:Yb, Er, [395] YAP:Yb,Er, [396] YAP:Sm, etc. find mention.…”

Section: Upconverting Aluminatesmentioning

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Luminescent Materials Based on Aluminates: A Review

Revankar

Gedekar²,

Moharil

2022

Physica Status Solidi (a)

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An aluminate is a compound containing an oxyanion of aluminum. Many aluminates are found in nature. A large number of phosphors that are used in various applications, such as scintillation detectors, optical thermometry, longlasting phosphorescence, solid-state lighting, solid-state lasers, upconversion, bioimaging, and plasma display panels, are based on aluminate formulae. This review focuses on the synthesis and characteristics of such phosphors. The conventional as well as novel methods of synthesizing these phosphors are reviewed. The emphasis on commercially important aluminate phosphors is discussed.

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Recent progress in multicolor tuning of rare earth-doped gadolinium aluminate phosphors GdAlO3

et al. 2017

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Preparation and fluorescence properties of Yb3+ and Er3+ co-doped GdAlO3 phosphors

Cited by 16 publications

References 16 publications

Effect of Calcination Temperature on Up-Conversion Photoluminescence of the GdAlO₃: Er³⁺,Yb³⁺Phosphor

Effect of Calcination Temperature on Up-Conversion Photoluminescence of the GdAlO₃: Er³⁺,Yb³⁺Phosphor

Luminescent Materials Based on Aluminates: A Review

Recent progress in multicolor tuning of rare earth-doped gadolinium aluminate phosphors GdAlO3

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Preparation and fluorescence properties of Yb3+ and Er3+ co-doped GdAlO3 phosphors

Cited by 16 publications

References 16 publications

Effect of Calcination Temperature on Up-Conversion Photoluminescence of the GdAlO3: Er3+,Yb3+Phosphor

Effect of Calcination Temperature on Up-Conversion Photoluminescence of the GdAlO3: Er3+,Yb3+Phosphor

Luminescent Materials Based on Aluminates: A Review

Recent progress in multicolor tuning of rare earth-doped gadolinium aluminate phosphors GdAlO3

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Effect of Calcination Temperature on Up-Conversion Photoluminescence of the GdAlO₃: Er³⁺,Yb³⁺Phosphor

Effect of Calcination Temperature on Up-Conversion Photoluminescence of the GdAlO₃: Er³⁺,Yb³⁺Phosphor