JOURNAL OF SOLID STATE CHEMISTRY
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2025
·
IF 3.5
Daobin Zhu,Junshan Hu,Yuxiang Wu,Keyu Guo,Changchun Ding,Rangrang Fan,Chunfeng Dong,Wei Jin,Yongtao Liu
Er 3+ ions and Yb 3+ ions co-doped indium oxide (In 2 O 3 ) phosphors were successfully synthesized by high temperature solid phase method. At 980 nm laser excitation, the phosphor has weak 552 nm green and strong 661 nm red emission bands. And the upconversion luminescence (UCL) intensity of red light is significantly stronger than that of green light. They are attributed to the 4 S 3/2 → 4 I 15/2 and 4 F 9/2 → 4 I 15/2 transitions of Er 3+ , respectively. And the optimal sample is In 2 O 3 : 4 % Er 3+ , 10 % Yb 3+ . The appearance of phosphor was observed by field emission scanning electron microscopy. The UCL of phosphor is a two-photon process based on power dependence. In addition, photoluminescence excitation spectra and down-conversion luminescence spectra are used to explain the luminescence mechanism. The temperature sensing property of the phosphor in the temperature range of 348 K–598 K were tested. The sensitivity were obtained by fluorescence intensity ratio ( FIR ). The fit degree of FIR is 0.9936. It achieves a maximum relative sensitivity of 0.73 % K −1 at 348 K and a maximum absolute sensitivity of 0.039 K −1 at 373 K. In 2 O 3 : Er 3+ , Yb 3+ phosphors with high quality luminescence and excellent sensitivity have important application value in non-contact temperature measurement.
研究领域:
材料科学
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光学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry C
·
2023
·Vol. 11
·期 7
·2494-2504
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IF 6.4
Xinxu Li,Bingting Bao,Xinyu He,Guoqiang Wang,Yantang Huang,Lingyun Li,Yan Yu
Optical temperature sensing technology, especially the fluorescence intensity ratio (FIR) type sensor based on Er3+, Yb3+ co-doped up-conversion (UC) luminescent materials, presents numerous opportunities in the field of temperature detection. Various Er3+, Yb3+ co-doped fluorides and oxides have been explored for the application of temperature sensing. Most of these Er3+, Yb3+ co-doped sensing materials are phosphors, for which the high temperature phase and chemical stability is still challenging. The Er3+, Yb3+ co-doped oxide single crystal is a promising solution to explore temperature sensing materials with practical application ability. In this work, an Er3+, Yb3+ co-doped LaBMoO6 single crystal (LBMO-SC: Er3+, Yb3+) is grown through flux assisted spontaneous crystal growth technology. Compared with the Er3+, Yb3+ co-doped LaBMoO6 polycrystalline samples (LBMO-PC: Er3+, Yb3+), the LBMO-SC: Er3+, Yb3+ shows improved UC performance with enhanced light emission and prolonged luminescence lifetime. The UC performance improvement results from the more efficient energy transfer between Yb3+ and Er3+. The energy transfer efficiency from Yb3+ to Er3+ in the LBMO-PC: Er3+, Yb3+ powders sintered at 1000 °C for 15 h is 7.3%, while it is 29.7% in the LBMO-SC: Er3+, Yb3+. The strong UC luminescence of LBMO-SC: Er3+, Yb3+ extends the temperature detection range; the luminescence of 4S3/2 → 4I15/2 in LBMO-SC: Er3+, Yb3+ is still measurable even when the temperature reaches 570 K. The LBMO-SC: Er3+, Yb3+ has a maximum value of relative temperature sensitivity of 1.16% K−1 at 300 K. Finally, an optical fiber type temperature sensor with practical application capability is successfully fabricated by using LBMO-SC: Er3+, Yb3+ as the luminescence sensing medium.
研究领域:
材料科学
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光学工程
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产品关联
DOI
高影响因子
Physica Status Solidi-Rapid Research Letters
·
2021
·Vol. 16
·期 2
·2100517
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IF 2.821
Feng Zhao,Qingfeng Bian,Yunting Chu,Yi Zhang,Qianyun Zhao,Jingchang Sun,Chengren Li
To date, it is still a challenging topic to achieve a wide tunable emission from the same sample under the excitation of a single pump source. Herein, a new sort of nanophosphor NaYO 2 :Er 3+ /Yb 3+ is prepared and characterized. In particular, the wide tunable range crossing red–yellow–green–white regions can be realized only by modulating the power density of the 980 nm semiconductor laser. The mechanism of emitting white light is discussed, and two formulae for quantitatively defining the fluorescent material's tuning ability are also offered. At the same time, the nanophosphor on hand possesses a high degree of reversibility. The nanophosphor presents comprehensive application prospects in information security, anticounterfeiting, display, and other fields.
研究领域:
材料科学
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光学
·
纳米技术
✓ 已验证
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DOI
高影响因子
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
·
2024
·Vol. 130
·期 6
·1-10
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IF 2.5
He Yu,Li Xin,Guo Yangyang,Mao Huibing,Chen Ye,Wang Jiqing
The ZnS: Ho 3+ , Yb 3+ , Mn 2+ nanomaterials fabricated by the co-precipitation method have the zinc-blende structure with the crystallite size about 90 ∼ 100 nm. The X-ray diffraction (XRD), the scanning electron microscope (SEM) and the transmission electron microscope (TEM) characterizations confirm that the doping of the Mn 2+ has less effect on the structure of the ZnS: Ho 3+ , Yb 3+ , Mn 2+ nanomaterials. With the excitation of a 978 nm laser, the upconversion (UC) emissions of the ZnS: Ho 3+ , Yb 3+ , Mn 2+ nanomaterials include two emission bands located at 551 and 664 nm, which correspond to the transitions 5 F 4 ( 5 S 2 )→ 5 I 8 and 5 F 5 → 5 I 8 of the Ho 3+ ions. The UC emission characterization confirms that the UC emission of the ZnS: Ho 3+ , Yb 3+ nanomaterials can be modulated by the doping of the Mn 2+ ions, the increase of the incident laser power and the change of the laser pulse-width. The red emission of the ZnS: Ho 3+ , Yb 3+ nanomaterials particle will increase significantly with the incorporation of the Mn 2+ ions. The incident laser power and the laser pulse-width also can modulate the intensity ratio G / R of the green to the red. With the increase of the incident laser power, the emission intensity ratio G / R will also increase. With the increase of laser pulse-width from 0.2 to 0.8 ms, the above intensity ratio G/R will decrease significantly. The modulation between the green and red emission is due to the energy transfer from the 5 F 4 ( 5 S 2 ) state to the 5 F 5 state of the Ho 3+ ions through the state 4 T 1 of the Mn 2+ ions.
研究领域:
材料科学
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光学
✓ 已验证
产品关联
DOI
高影响因子
Materials Research Express
·
2018
·Vol. 5
·期 10
·106203
·
IF 1.151
Tao Pang,Wenbo Peng
Upconversion luminescence of Yb3+/Er3+ and Yb3+/Tm3+ co-doped Y2(MoO4)3 phosphors under 980 nm excitation is investigated. It is demonstrated that Yb3+ co-doping causes a significant thermal effect. For Yb3+ and Er3+ co-doped case, the thermal effect, the long-distance energy migration and the energy transfer from Er3+ to Yb3+ are responsible for the abnormal luminescence quenching. In the case of Yb3+ and Tm3+ co-doped, the thermal effect improves the excited efficiency of Tm3+, and thus the luminescence of Tm3+ continues to strengthen at the Yb3+ concentration that causes Er3+ luminescence quenching. These results contribute to the design of the efficient upconversion materials.
研究领域:
材料科学
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光学
✓ 已验证
DOI
高影响因子
JOURNAL OF MOLECULAR STRUCTURE
·
2025
·
IF 4.7
Wenzhi Su,Mengyu Zhang,Chuancheng Zhang,Yong Zou,Wenpeng Liu,Shoujun Ding
Upconversion (UC) fluorescence intensity ratio (FIR) technology has emerged as a promising approach for optical thermometry due to its ability to provide non-contact, high-precision temperature measurements. Unlike conventional UC phosphor-based systems, single-crystal UC materials offer enhanced responsiveness and sensitivity for thermal detection, thanks to their structural stability and superior thermal conductivity. In this study, we successfully synthesized an Yb 3+ , Ho 3 ⁺:NaBi(MoO 4 ) 2 (NBM) single crystal with exceptional optical quality using the Czochralski (Cz) growth technique. Comprehensive structural characterization was carried out using X-ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy, and scanning electron microscopy (SEM). The results confirmed that Yb 3+ , Ho 3+ :NBM crystallizes in a tetragonal structure with the space group I4 1 /a. The emission of different visible light colors under various excitation wavelengths was found to be due to the multiphonon relaxation process. Systematic analysis of power-dependent up-conversion emission spectra conclusively showed that the green and red up-conversion emissions arise from two-photon excitation processes. Moreover, temperature-dependent spectral evolution in the range of 300–500 K was quantitatively analyzed, allowing the calculation of both absolute sensitivity ( S ₐ) and relative sensitivity ( S ᵣ) parameters to evaluate the material's optical thermometric performance. These findings highlight the promising potential of Yb 3+ , Ho 3+ :NBM single crystal for developing high-performance optical thermometry devices.
研究领域:
材料科学
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光学
✓ 已验证
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DOI
高影响因子
CRYSTENGCOMM
·
2024
·Vol. 26
·期 10
·1371-1379
·
IF 2.6
Meijuan Liu,Ying Chen,Xuegang Zheng,Haonan Zhao,Shusheng Pan,Zhiyu Liu,Dekang Xu,Hao Lin
In this study, a series of LiErF4:Tm@LiYF4:Yb,Er,Ce@LiYF4 core/shell/shell (C/S/S) UC nanoparticles (UCNPs) were prepared by a co-precipitation method. In this design of C/S/S structure, Er3+ is used as an energy collector in the first shell, which can reduce the energy loss by absorbing spontaneous emission from Yb3+. Then, by adding appropriate concentrations of Ce3+ into the same shell, the cross relaxation effect between Er3+ and Ce3+ is exploited to improve the efficiency of Er3+ in collecting the energy of spontaneous emission from Yb3+. During the upconversion (UC) process, Yb3+ plays a role as an energy transfer bridge, transferring the energy back to Er3+ in the core, thus enhancing the red UC emission intensity. Meanwhile, Tm3+ acts as an energy trapping center that contributes to the red emission. The results show that the spontaneous emission loss of Yb3+ has a certain effect on the UC fluorescence intensity, which will weaken the fluorescence to some extent, however is not the cause of the substantial decay of fluorescence. Therefore, this study provides clues for researchers to identify main factors affecting the luminescence efficiency, which will help develop more efficient UCNPs.
研究领域:
材料科学
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光学
✓ 已验证
产品关联
DOI
高影响因子
CRYSTENGCOMM
·
2024
·Vol. 26
·期 27
·3603-3608
·
IF 2.6
Wenfei Xun,Zhipeng Meng,Chuwei Xie,Suli Wu
808 nm excited Nd3+ doped upconversion nanoparticles (UCNPs) have become a new research hotspot due to their reduced thermal effect when applied in a water-rich system. Different from Tm3+-mediated energy migration upconversion of Tb3+, in this work, NaYF4:Yb/Tb@NaYF4:Yb@NaNdF4:Yb@NaYF4 core–shell–shell–shell nanoparticles were designed based on the Yb3+ sensitized cooperative energy-transfer process to realize photon upconversion. NaYF4:Yb served as the migration layer, separating the activator Tb3+ from the sensitizer Nd3+ and minimizing the deleterious cross-relaxation between them. At 40% Yb3+ doping concentration in the NaYF4:Yb layer, bright green luminescence was achieved under 808 nm excitation. Meanwhile, the presence of Yb3+ in the sensitization layer (NaNdF4:Yb) reduced Nd3+ cross-relaxation, leading to improved energy migration efficiency of Nd3+ → Yb3+. Finally, the incorporation of an inert NaYF4 shell resulted in a significant luminescence boost. These nanoparticles can be dispersed in water after surface modification and could be effectively excited after laser penetration of 3 cm of water, indicating the enormous potential of the designed UCNPs in the biological system.
研究领域:
材料科学
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生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THE KOREAN PHYSICAL SOCIETY
·
2021
·Vol. 78
·期 9
·796-802
·
IF 0.649
Wang Yunfeng,Chen Jun,Wei Xiaoyu,Cui Shaobo,Jia Xiao
Rare-earth-doped upconverison luminescent (UCL) materials have wide application prospects in the field of nanoptoelectronics technology. However, achieving highly efficient UCL materials is still a big challenge due to the serious nonradiative energy loss in the host materials. In this research, Gd 2 (WO 4 ) 3 : Yb 3+ , Er 3+ inverse opal photonic crystals (IOPCs) were prepared using a polymethylmethacrylate (PMMA) template-assisted method, and the effects of modulations of the IOPC structure on UC emission properties of Er 3+ were investigated systemically. As a result, the emission intensity of 2 H 11/2 - 4 I 15/2 in IOPC was found to be suppressed 37.4%, and the radiative lifetimes of 4 S 3/2 - 4 I 15/2 were prolonged 1.55 times. The effects of the doping concentration on the reciprocal of fluorescence lifetimes of 4 S 3/2 - 4 I 15/2 between the IOPC and the reference (REF) samples showed that the cross-energy transfer (CET) rate and the electronic transition rate were greatly inhibited, which could be due to the effect of the modulation of the effective index on the radiative transition rate and on the decrease of nonradiative transition rate caused by periodic thin-walled structure of IOPC. The power-dependent UC emission properties validated the supposition that the IOPC structure could be effectively suppressed the local thermal effect and thermal quenching. This research presents a further step in the exploration of the new kind of UCL materials with high luminous efficiency.
研究领域:
材料科学
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光学
✓ 已验证
产品关联
DOI
高影响因子
OPTICAL MATERIALS
·
2023
·
IF 3.9
Mengjia Zhang,Changchun Ding,Bin Duan,Yuxiang Wu,Yongqiang Li,Jin Wei,Fengyi Wang,Junshan Hu
The upconversion luminescence (UCL) of inorganic materials doped with activators and sensitizers has great application, but its luminescence intensity always impose restrictions on its development. Herein, an obvious enhancement in luminescence intensity of the WO 3 : Yb 3+ , Ho 3+ phosphor was realized through non-equivalence substitution of Bi 3+ ions. The single pure phase of the synthesized WO 3 : Yb 3+ , Ho 3+ , and Bi 3+ phosphors has been confirmed by the XRD pattern. The morphology of phosphors and valence state of elements have been performed by SEM and XPS techniques. The sample on excitation with 980 nm performs forceful green emission and weak red emission at 543 nm and 662 nm, separately. The concentrations for doped Yb 3+ and Ho 3+ to obtain the optimal UCL in WO 3 are 8% and 1%, respectively. The optimized doping concentration for Bi 3+ ions is 3%. Compared to samples without Bi 3+ ions, the Yb 3+ /Ho 3+ /Bi 3+ doped WO 3 obtains 1.59 and 2.33 times increase in emission intensity of green and red, respectively. We also explored the UCL mechanism and enhancement mechanism on the basis of the power dependency, the UCL and the downshift luminescence. These results based on Yb 3+ /Ho 3+ UCL phosphors research is of great significance.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2021
·Vol. 33
·期 2
·596-606
·
IF 2.478
Hu Haisheng,Jiang Qun,Li Yunfei,Liu Meitang
The K + -doped (Na 1− x K x )GdF 4 :Er 3+ ,Yb 3+ upconversion materials were successfully synthesized by solvothermal method. The doping of K + was testified to have great influences on improving upconversion properties as it directly affects the morphology of the material matrix. In addition, by coating the doped material with a homogeneous shell layer, a newly developed core–shell (Na 0.9 K 0.1 )GdF 4 :Er 3+ ,Yb 3+ @NaGdF 4 nanomaterials were produced. Surprisingly, its light emission intensity was 2 times of that for the uncoated material, although the crystal structure and the emission color of the nanoparticles did not change. The upconversion mechanism has also been studied, and the results show that there is a two-photon mechanism of (Na 1− x K x )GdF 4 :Er 3+ ,Yb 3+ . The work provides a new strategy for enhancing the luminescence density of upconversion materials by coating a homogeneous shell after doping.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
OPTICAL MATERIALS
·
2018
·
IF 2.32
Rui Wang,Maohui Yuan,Chaofan Zhang,Hongyan Wang,Xiaojun Xu
Transition metal ions (e.g. Mn 2+ ) and lanthanide co-doped upconversion (UC) materials have attracted wide attention in recent years due to their promising application in multicolor display. Here, we report the hydrothermal synthesis and characterization of Mn 2+ doped monodisperse CaF 2 :Yb 3+ /Ho 3+ microspheres . The results of X-ray diffraction (XRD) revealed that Mn 2+ doping does not change the cubic phase of CaF 2 material but will lead to diffraction peaks shifting slightly towards higher angle due to the substitution of larger Ca 2+ by the relatively smaller Mn 2+ . Under the excitation of 980 nm continuous wave (CW) laser, these microspheres exhibit green-yellow-red tuning colors and remarkable enhancement of both red to green ratio (R/G) and red to blue ratio (R/B) when increasing Mn 2+ concentration from 0 to 30 mol%. The energy migration process between Ho 3+ and Mn 2+ was proposed and supported by time-decay and power dependence measurements of Ho 3+ UC emission. These upconversion materials may have potential applications in optical devices , color display, nanoscale lasers and biomedical imaging.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）