Luminescent and thermometric properties of dual emitting Eu2+/Sm3+ co-doped Sr4La(PO4)3O phosphor based on energy transfer

Liu, Fuwen; Deng, Degang; Wu, Ming; Chen, Bowen; Zhou, Liuyan; Xu, Shiqing

doi:10.1016/j.jre.2020.06.003

Cited by 40 publications

(8 citation statements)

References 40 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Each curve in the graph represents the decay process with time for the carriers populated on Ho: 5 F 4 / 5 S 2 level. The decay data were well fitted by Equation (1) [34] with bi-exponent items,…”

Section: Resultsmentioning

confidence: 99%

The Effects of Li+ Doping on Structure and Upconversion Luminescent Properties for Bi3.46Ho0.04Yb0.5Ti3O12: xLi Phosphors

et al. 2021

View full text Add to dashboard Cite

A series of novel Li+ doped Bi3.46Ho0.04Yb0.5Ti3O12 (BHYTO: xLi, 0 ≤ x ≤ 0.15) upconversion phosphors were prepared through a sol-gel-sintering method. There exist three emission bands centered at 545 nm, 658 nm, and 756 nm in the upconversion emission spectra at 980 nm excitation, corresponding to energy transitions of 5F4/5S2 → 5I8, 5F5 → 5I8 and 5F4/5S2 → 5I7 of Ho3+, and the upconversion emission intensity of BHYTO: 0.05Li is about 2.2 times stronger than that of BHYTO samples. The luminescent lifetime of the strongest emission (545 nm) is in the range of 45.25 to 65.99 μs for the different BHYTO: xLi phosphors. The energy transfers during the upconversion pumping process from Yb3+ to Ho3+ are mainly responsible for all the emissions, each belonging to a double-photon process. Li+ mainly entered into the interspace sites or occupied Bi3+ sites in Bi4Ti3O12 host during the fabrication process according to its dosage, and the possibility is very low for Li+ to take part in the energy transfer process directly due to its lack of matching levels with 4f of Ho3+ and Yb3+. However, Li+ doping can not only increase the size of crystal grains to improve crystallinity through XRD analysis, but also reduced oxygen vacancies to decrease the number of quenching centers through XPS analysis. The improved crystallinity and reduced quenching centers are proposed to be the main causes for the enhanced upconversion luminescence of the Li+ doped BHYTO phosphor.

show abstract

Section: Resultsmentioning

confidence: 99%

The Effects of Li+ Doping on Structure and Upconversion Luminescent Properties for Bi3.46Ho0.04Yb0.5Ti3O12: xLi Phosphors

et al. 2021

View full text Add to dashboard Cite

show abstract

“…Using various quenched behaviors of Eu 2+ and Sm 3+ at high temperatures, Deng et al found that Sr 4 La(PO 4 ) 3 O:Eu 2+ / Sm 3+ phosphors, which possessed a maximum relative sensitivity (i.e., S r ) of 0.48384% K −1 , exhibited potential applications in temperature measurement. 15 According to the temperature-related FIR value of Pr 3+ to Dy 3+ in La 2 MgTiO 6 compounds, Li et al reported that the maximum S r and absolute sensitivity (i.e., S a ) of the resultant samples were 2.357% and 0.09 K −1 , respectively. 16 Moreover, other luminescent materials including LaScO 3 :Cr 3+ /RE 3+ (RE 3+ = N d 3 + , P r 3 + , T m 3 + , Y b 3 + ) , L a 3 B W O 9 : B i 3 + / S m 3 + , Gd 2 ZnTiO 6 :Bi 3+ /Mn 4+ , BaZnOS:Pr 3+ /Mn 4+ , etc., 17−20 had been also developed for noncontact optical thermometry.…”

Section: Introductionmentioning

confidence: 99%

“…Using various quenched behaviors of Eu 2+ and Sm 3+ at high temperatures, Deng et al. found that Sr 4 La(PO 4 ) 3 O:Eu 2+ /Sm 3+ phosphors, which possessed a maximum relative sensitivity (i.e., S r ) of 0.48384% K –1 , exhibited potential applications in temperature measurement . According to the temperature-related FIR value of Pr 3+ to Dy 3+ in La 2 MgTiO 6 compounds, Li et al reported that the maximum S r and absolute sensitivity (i.e., S a ) of the resultant samples were 2.357% and 0.09 K –1 , respectively .…”

Section: Introductionmentioning

confidence: 99%

Manipulating Upconversion Emission and Thermochromic Properties of Ho³⁺/Yb³⁺-Codoped Al₂Mo₃O₁₂ Microparticles by Negative Lattice Expansion for Multimode Visual Optical Thermometry

Luo

et al. 2022

Inorg. Chem.

View full text Add to dashboard Cite

To ameliorate the inherent thermal quenching behaviors of upconverting materials, a series of Ho 3+ /Yb 3+ -codoped Al 2 Mo 3 O 12 (i.e., Al 2 Mo 3 O 12 :Ho 3+ /2xYb 3+ ) microparticles were developed. Upon excitation at 980 nm, intense upconversion (i.e., UC) emissions arising from Ho 3+ are observed, and their optimal states occur at x = 0.09. Besides, the UC mechanisms of these generated emissions from 5 F 4 / 5 S 2 and 5 F 5 levels all pertain to a two-photon absorption process. Furthermore, modified thermal quenching performances are realized in the resultant microparticles, in which the intensities of the UC emissions arising from 5 F 4 / 5 S 2 levels decrease as the temperature increases, while that of the UC emission from the 5 F 5 level increases and then decreases with the increase of temperature. The coexistence of nonradiative transition promoted crossrelaxation, and energy transfer routes can be responsible for the above phenomenon. By studying the diverse UC emission characteristics at high temperatures, we revealed the thermometric properties of Al 2 Mo 3 O 12 :Ho 3+ /2xYb 3+ microparticles, where their sensitivities can be regulated by selecting the spectral mode and dopant contents. According to the intensity ratio of the UC emissions originating from 5 F 5 → 5 I 8 to ( 5 F 4 , 5 S 2 ) → 5 I 7 transitions at different temperatures, one obtains that the relative and absolute sensitivities of the developed compounds reach up to 0.464% and 0.1739 K −1 , respectively. Additionally, by the analysis of the thermochromic performances of final products, their thermometric characteristics were also investigated. Note that the environmental temperature is able to be facilely read out by distinguishing the emitting color. These results verify that the Al 2 Mo 3 O 12 :Ho 3+ /2xYb 3+ microparticles are promising luminescent materials for multimode visual optical thermometry.

show abstract

“…Moreover, Eu 2+ /Sm 3+ co‐doped dual‐emitting Sr 4 La(PO 4 ) 3 O phosphors synthesized through a convenient high temperature solid‐state reaction in a reductive atmosphere were reported by Deng and colleagues. [ 25 ] However, there is no evidence that the Ba 2 AlB 4 O 7 Cl phosphor co‐activated with Sm 3+ to Eu 2+ energy transfer has been reported to date. Therefore this is a completely new investigation on the proposed phosphor for WLED applications.…”

Section: Introductionmentioning

confidence: 99%

Luminescence investigation of Sm³⁺,Eu²⁺‐activated/co‐activated Ba₂AlB₄O₇Cl phosphors: novel red to blue colour tuning in chloroborates

2022

View full text Add to dashboard Cite

Borochlorate phosphors have shown their worth in modern day lighting over the last few years. Colour tunability of the phosphor is a modern techniques used to obtain white-light-emitting diodes (WLEDs). In the proposed work, Sm 3+ ,Eu 2+ -activated/co-activated Ba 2 AlB 4 O 7 Cl phosphors were investigated for WLED applications as well as display devices. A convectional solid-state diffusion method was used to synthesize the proposed phosphors. X-ray diffraction (XRD) of the proposed phosphors confirmed the crystalline nature of the sample. Morphological studies on the samples were carried out using scanning electron microscopy analysis. A photoluminescence study of the colour tunable phosphor showed the characteristic peak of Sm 3+ together with one broad peak for Eu 2+ ions. Red to blue colour tunability was observed in the proposed phosphor with enhancement of Eu 2+ ions. All these results showed the worth of this sample in WLED applications as well as in display devices.

show abstract

Luminescent and thermometric properties of dual emitting Eu2+/Sm3+ co-doped Sr4La(PO4)3O phosphor based on energy transfer

Cited by 40 publications

References 40 publications

The Effects of Li+ Doping on Structure and Upconversion Luminescent Properties for Bi3.46Ho0.04Yb0.5Ti3O12: xLi Phosphors

The Effects of Li+ Doping on Structure and Upconversion Luminescent Properties for Bi3.46Ho0.04Yb0.5Ti3O12: xLi Phosphors

Manipulating Upconversion Emission and Thermochromic Properties of Ho³⁺/Yb³⁺-Codoped Al₂Mo₃O₁₂ Microparticles by Negative Lattice Expansion for Multimode Visual Optical Thermometry

Luminescence investigation of Sm³⁺,Eu²⁺‐activated/co‐activated Ba₂AlB₄O₇Cl phosphors: novel red to blue colour tuning in chloroborates

Contact Info

Product

Resources

About

Luminescent and thermometric properties of dual emitting Eu2+/Sm3+ co-doped Sr4La(PO4)3O phosphor based on energy transfer

Cited by 40 publications

References 40 publications

The Effects of Li+ Doping on Structure and Upconversion Luminescent Properties for Bi3.46Ho0.04Yb0.5Ti3O12: xLi Phosphors

The Effects of Li+ Doping on Structure and Upconversion Luminescent Properties for Bi3.46Ho0.04Yb0.5Ti3O12: xLi Phosphors

Manipulating Upconversion Emission and Thermochromic Properties of Ho3+/Yb3+-Codoped Al2Mo3O12 Microparticles by Negative Lattice Expansion for Multimode Visual Optical Thermometry

Luminescence investigation of Sm3+,Eu2+‐activated/co‐activated Ba2AlB4O7Cl phosphors: novel red to blue colour tuning in chloroborates

Contact Info

Product

Resources

About

Manipulating Upconversion Emission and Thermochromic Properties of Ho³⁺/Yb³⁺-Codoped Al₂Mo₃O₁₂ Microparticles by Negative Lattice Expansion for Multimode Visual Optical Thermometry

Luminescence investigation of Sm³⁺,Eu²⁺‐activated/co‐activated Ba₂AlB₄O₇Cl phosphors: novel red to blue colour tuning in chloroborates