Laser & Photonics Reviews
·
2024
·
IF 9.8
Yinghao Wei,Sen Yang,Kaihang Zhu,Linshuo Gao,Liji Wang,Guanying Chen,Ai-Hua Li
Weak luminescence of the small-sized lanthanide-doped nanoparticles has limited their applications long. In recent years, there is a growing interest in luminescence thermal enhancement in small-sized upconversion nanoparticles (UCNPs). The mitigation of surface quenching effects and the improvement of energy transfer (ET) are two convincing explanations for this phenomenon. A systematical investigation on the luminescence dynamics of Yb 3+ is implemented. ET rate and then the proportion of ET increases greatly with rising temperatures in Yb 3+ /Tm 3+ codoped system, while an alternative trend can be summarized in Yb 3+ /Er 3+ one. Based on these findings, therefore it can be concluded that the surface quenching mitigation related to the desorption of water molecules on the surface is a common mechanism of the luminescence thermal enhancement. But ET related to the thermally-activated surface phonons is a special case, it does play a positive role in Yb 3+ /Tm 3+ system. These findings not only explain the upconversion luminescence thermal enhancement in Yb 3+ /Tm 3+ system is more significant but also help to understand thermal enhancement and benefit highly-sensitive temperature probe design.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
Optical Materials Express
·
2014
·Vol. 4
·期 6
·1186-1196
·
IF 2.923
E. H. Song,S. Ding,M. Wu,S. Ye,Z. T. Chen,Y. Y. Ma,Q. Y. Zhang
Tunable broadband white upconversion (UC) luminescence has been demonstrated in Yb3+/Tm3+/Mn2+ tri-doped KZnF3 nanocrystals from the excitation of a 976 nm laser diode (LD). The white light is composed of three sharp band peaks at 480, 650 and 700 nm, originating from the UC emissions of Tm3+ ions, and one broad band centered at 585 nm, originating from exchange-coupled Yb3+–Mn2+ dimers. The effects of the concentration, pump power and temperature on the UC luminescence properties of KZnF3:Yb3+,Tm3+,Mn2+ nanocrystals have been investigated. By changing the Mn2+/Tm3+ content ratio, various colors of the UC luminescence can be easily obtained in KZnF3:Yb3+,Tm3+,Mn2+ nanocrystals, which gives these nanocrystals potential applications in the fields of lighting, displays and lasers.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
OPTIK
·
2022
·
IF 2.84
Ying Chen,Xuegang Zheng,Haobo Lin,Meijuan Liu,Shusheng Pan,Zhiyu Liu,Tong Liu,Dekang Xu,Hao Lin
In the work, a range of Er 3+ -sensitized NaYF 4 upconversion (UC) particles doped with Tm 3+ and Ho 3+ are successfully prepared by hydrothermal process. The UC crystals appear two green emission peaks at 529 and 541 nm and a remarkable red emission peak at 655 nm under 980 and 1532 nm irradiations. Here, Tm 3+ and Ho 3+ serve as trapping centers, which confine the excitation energy efficiently to promote the red UC emission and improve the red to green ratio. UC mechanisms in the Er 3+ /Tm 3+ co-doped and Er 3+ /Ho 3+ co-doped NaYF 4 crystals are discussed at length based on the UC luminescence spectroscopy. Unlike the traditional sensitization with high Er 3+ concentration doping to obtain red light, the red UC luminescence is acquired by low Er 3+ concentration doping, which can effectively avoid concentration quenching caused by high Er 3+ concentration doping. Furthermore, NaYF 4 :Er 3+ , Tm 3+ crystals exhibit stronger red UC emission compared with NaYF 4 :Er 3+ , Ho 3+ counterparts. Er 3+ -sensitized NaYF 4 crystals doped with Tm 3+ and Ho 3+ ions generate pure red light more efficaciously under 1532 nm excitation than under 980 nm excitation. The phosphors emitting brilliant red UC emission have the potential applications in solid state lasers and biological imaging.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
Small Methods
·
2024
·
IF 10.7
Ran An,Pengye Du,Yuan Liang,Shuyu Liu,Yi Wei,Pengpeng Lei,Hongjie Zhang
Optical encryption shows great potential in meeting the growing demand for advanced anti-counterfeiting in the information age. The development of upconversion luminescence (UCL) materials capable of emitting different colors of light in response to different external stimuli holds great promise in this field. However, the effective realization of multicolor UCL materials usually requires complex structural designs. In this work, orthogonal UCL is achieved in crystals with a simple structure simply by introducing modulator Tm 3+ ions to control the photon transition processes between different energy levels of activator Er 3+ ions. The obtained crystals emit red and green UCL when excited by 980 nm and 808 nm lasers, respectively. The orthogonal excitation-emission properties of crystals are shown to be very suitable for high-level optical encryption, which is important for information security and anti-counterfeiting. This work provides an effective strategy for obtaining orthogonal UCL in simple structural materials, which will encourage researchers to further explore novel orthogonal UCL materials and their applications, and has important implications for the development of the frontier photonic upconversion fields.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Defu Xu,Xiao Xiao,Qiang Fan
The development of multi-mode self-calibrated photothermal thermometers for high-temperature applications is critically needed. However, most existing strategies are limited by single mode and severe thermal quenching. To address this, activator Er 3+ , Tm 3+ , and sensitizer Yb 3+ co-doped Y 2 W 3 O 12 (YWO) negative thermal expansion (NTE) phosphors have been developed, which exhibit effective resistance to thermal quenching in the up-conversion luminescence under 980 nm excitation. Moreover, an abnormal 3-photon-dominated up-conversion process was observed in YWO:18Yb/2Er/0.5Tm powder, attributed to the cross-relaxation (CR) between Er 3+ and energy transfer (ET) from Er 3+ to Tm 3+ . In addition, benefiting from the effect of NTE and the limited ET process in YWO:18Yb/2Er/0.5Tm, the relative intensity of the temperature-dependent up-conversion from the 2 H 11/2 , 4 S 3/2 , and 1 G 4 level, as well as their state splitting luminescence, exhibit distinct disparities. Furthermore, based on the luminescence intensity ratio (LIR) technique, a four mode self-calibrated optical thermometer using YWO:18Yb/2Er/0.5Tm powder is designed. The thermometer exhibits acceptable sensitivity, with absolute sensitivity ( S a) and relative sensitivity ( S r) reaching 0.006 K -1 at 293 K and 0.26% K -1 at 543 K, respectively. The developed thermometer could provide a reference for self-calibration, and its wide spectral operating range ensures the reliability of temperature sensing, which has the potential to be used in some high-temperature conditions.
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 NANOPARTICLE RESEARCH
·
2018
·Vol. 20
·期 6
·1-13
·
IF 2.127
Cheng Yuan,Sun Kangning
YVO 4 :Yb 3+ ,Er 3+ ; YVO 4 :Yb 3+ ,Tm 3+ ; and YVO 4 :Yb 3+ ,Er 3+ ,Tm 3+ were all synthesized via sol-gel method with a subsequent thermal treatment. Specifically, YVO 4 :Yb 3+ ,Er 3+ ,Tm 3+ phosphors were prepared with different annealing temperatures to study the influence of temperature. The transmission electron microscope (TEM), scanning electron microscope (SEM), X-ray diffractometer (XRD), and photoluminescent (PL) spectrofluorometer were used to investigate the morphology, crystal structure, and up-conversion luminescent properties of all samples. In summary, all samples were granular-like nanoparticles and well crystallized with the same tetragonal phase as YVO 4 . Under the irradiation at 980 nm, YVO 4 :Yb 3+ ,Er 3+ phosphors can generate green emission at 525 and 553 nm and red emission at 657 nm, while YVO 4 :Yb 3+ ,Tm 3+ phosphors can generate blue emission at 476 nm, red emission at 648 nm, and near-infrared emission at 800 nm. Notably, YVO 4 :Yb 3+ ,Er 3+ ,Tm 3+ samples can exhibit green emission, blue emission, red emission, and near-infrared emission at the same time, which might endow the as-prepared samples with potential applications in many fields, such as luminous paint, infrared detection, and biological label.
研究领域:
材料科学
·
光学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
Journal of Physical Chemistry C
·
2023
·
IF 3.7
Huocheng Lv,Qian Wu,Laihui Luo,Weiping Li,Peng Du
To develop high-sensitivity optical thermometers, Yb3+/Tm3+-codoped La2Mo3O12 microparticles were synthesized by the sol–gel method. With the aid of in situ X-ray diffraction, the resultant microparticles are verified to possess negative thermal expansion (NTE) properties. When excited at 980 nm, the upconversion (UC) emission properties of final products are investigated, in which their strongest fluorescence intensities are reached at x = 0.07. Due to the coexistence of the increased energy transfer, cross-relaxation, and nonradiative relaxation procedures, the as-prepared microparticles present thermochromic UC emissions. Moreover, the intensity of UC emission arising from the 3F2,3 excited level at 583 K is 21 times higher than its starting value at 303 K, resulting in thermally enhanced luminescence in resultant microparticles. By employing the fluorescence intensity ratio technique to investigate the temperature-related intensities of UC emissions from 1G4 and 3F2,3 levels, the thermometric characterization of designed compounds is explored, where its highest absolute and relative sensitivities are 0.44 K–1 and 7.37% K–1, respectively. Furthermore, according to the temperature-related lifetimes of 1G4 and 3F2,3 levels of Tm3+, the relative sensitivities of developed microparticles are 0.36% and 0.23% K–1, respectively. Ultimately, visual optical thermometry is also realized by the studied samples owing to their thermochromic UC emissions. Our findings propose a facile strategy by employing NTE to regulate the UC emission behaviors of rare-earth ions so as to obtain high-sensitive luminescent materials.
研究领域:
材料科学
·
光学工程
✓ 已验证
产品关联
DOI
高影响因子
Inorganics
·
2023
·Vol. 11
·期 8
·323
·
IF 2.9
Huichao Zhang,Jinpeng Xin,Huaimin Jin,Wenhao Xiang,Muqing Chen,Yang-Rong Yao,Shangfeng Yang
Metal cyanide clusterfullerenes (CYCFs) are formed via the encapsulation of a single metal atom and a cyanide unit inside fullerene cages, endowing them with excellent properties in various applications. In this work, we report the synthesis, isolation, and characterizations of the first cases of thulium (Tm)-based CYCFs with the popular C82carbon cages. The structural elucidation of the two TmCN@C82isomers was achieved via diverse analytical techniques, including mass spectrometry, Vis-NIR spectroscopy, single-crystal X-ray crystallography, and cyclic voltammetry. The crystallographic analyses unambiguously confirmed the molecular structures of the two TmCN@C82isomers as TmCN@Cs(6)-C82and TmCN@C2v(9)-C82. Both TmCN clusters adopt a well-established triangular configuration, with the Tm ion located on the symmetrical plane of the carbon cages. The electronic structures of both TmCN@C82isomers adopt a Tm3+(CN)−@(C82)2−configuration, exhibiting characteristic spectral and electrochemical properties reminiscent of divalent endohedral metallofullerenes (EMFs). Intriguingly, unlike the divalent Tm2+ion observed in the mono-metallofullerenes Tm@C2n, a higher oxidation state of Tm3+is identified in the monometallic TmCN cluster due to bonding with the cyanide anion. This result provides valuable insight into the essential role of the non-metallic endo-units in governing the oxidation state of the metal ion and the electronic behaviors of EMFs.Keywords:endohedral metallofullerenes;cyanide clusterfullerenes;thulium;X-ray crystallography
研究领域:
材料科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Minghan Zhou,Tongtong Gao,Shuanglong Chen,Xuejiao Wang,Qiushi Wang,Cailong Liu
Due to its unique advantages including non-contact operation, high sensitivity, and exceptional spatial resolution, nanoscale optical thermometry has become an indispensable technique with widespread applications in micro/nanoelectronics, integrated photonic systems, and biomedical engineering. Here, Yb 3+ /Tm 3+ co-doped AlN nanowires were successfully synthesized via an arc-discharge method. The nanowires, characterized by X-ray diffraction, Raman spectroscopy, X-ray photoelectron spectroscopy, energy-dispersive X-ray spectroscopy, scanning electron microscopy, and transmission electron microscopy, exhibit lengths of several micrometers and uniform diameters ranging from 10 to 20 nm, yielding a high aspect ratio. Under 980 nm excitation, the nanowires display distinct up-conversion (UC) luminescence, with emission bands at 544 nm (green), 654 nm and 691 nm (red), and 795 nm (near-infrared), corresponding to Tm 3+ ion transitions. The AlN:Yb 3+ /Tm 3+ nanowires show excellent optical thermometry performance, achieving a maximum relative sensitivity ( S r ) of 3.32 % K −1 at 298 K and a temperature resolution ( δT ) of 0.009 K. These results underscore the potential of AlN:Yb 3+ /Tm 3+ nanowires for advanced optical temperature sensing in nanotechnology, biomedical applications, and high-resolution thermal imaging.
研究领域:
材料科学
·
纳米技术
·
光学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2012
·
IF 2.289
Hui Hu,Yan Bai
In this study, TeO 2 :Tm 3+ /Er 3+ /Yb 3+ nanoparticles had been successfully prepared via a hydrothermal process. All the as-prepared TeO 2 :Tm 3+ /Er 3+ /Yb 3+ nanoparticles showed the blue (476 nm), green (525 nm, 545 nm) and red (667 nm) emissions under 980 nm excitation, which were attributed to the 1 G 4 → 3 H 6 (Tm 3+ ), 2 H 11/2 , 4 S 3/2 → 4 I 15/2 (Er 3+ ) and 4 F 9/2 → 4 I 15/2 (Er 3+ ) transitions, respectively. The decay lifetime of blue, green and red emissions were 40 μs, 46 μs and 89 μs, respectively. The combination of blue, green and red emissions resulted in the white luminescence which was intense and visible to the naked eyes. The calculated CIE color coordinates of TeO 2 :Tm 3+ /Er 3+ /Yb 3+ nanoparticles fell well within the white region and changed little with the incident pump power from 1.75 W/cm 2 to 16.13 W/cm 2 , which indicated that the materials may have potential applications in the fields of three dimensional displays, back lighting, white light sources, and so on.
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 LUMINESCENCE
·
2020
·
IF 3.28
Xin Wang,Jibo Yu,Haiyan Zhao,Xiaosong Lu,Wenhao Li,Ke Tian,Gilberto Brambilla,Pengfei Wang
In this letter, high Q factor microsphere resonators with excellent stability and high damage threshold are fabricated from Tm 3+ doped fluorosilicate glasses using the traditional melt-quenching and fiber heating techniques. Intense 1.88 μm photoluminescence and single mode laser emission are obtained under the excitation of an 808 nm laser. The Q factor of the microsphere resonator is measured to be as high as 1.4 × 10 6 . Models for photoluminescence and lasing are proposed using spectroscopic data from the absorption and emission spectra . The excellent resistance to humidity and temperature are characterized from the transmittance spectra under different environmental conditions. Differential thermal analysis (DTA), measured in four different glass samples proves the high damage threshold. The proposed glass microsphere resonator laser can find application in optical sensors and micro lasers, especially in complex environments.
研究领域:
光学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
OPTICAL MATERIALS
·
2020
·
IF 2.779
Cuimei Cheng,Na Zeng,Qing Jiao,Xianghua Zhang,Xueyun Liu
The design of optical materials with efficient white-light emission performance is still of great interest in the fields of visible lighting and communication. In this paper, Yb 3+ /Mn 2+ /Tm 3+ tri-doped upconversion (UC) white-emitting transparent glass ceramics have been successfully fabricated by a melt-quenching technique. The structure and luminescent properties of the resultant samples were investigated using X-ray diffraction (XRD), transmission electron microscopy (TEM), optical transmission spectra, and photoemission spectra. Owing to the co-precipitation of dual-phase γ -Ga 2 O 3 / β -YF 3 nanocrystals in the matrix, the Yb 3+ /Mn 2+ co-doped glass ceramics exhibited tunable dual-to single-broadband UC emission with the content of Mn 2+ varying from 0.75 to 4 mol%. After Tm 3+ ions were introduced into the co-doped GC sample, a UC white-light luminescence was realized by combining the yellowish emission (510–630 nm) of Yb 3+ -Mn 2+ pair and blue emission (476 nm) of Tm 3+ . Importantly, the white-emitting glass ceramic sample showed excellent thermal recoverability during a heating and cooling cycle within the temperature range of 303–573 K. Our results indicated the designed Yb 3+ /Mn 2+ /Tm 3+ tri-doped glass ceramics may be a promising candidate for the white-light lasers source.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）