JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2020
·Vol. 104
·期 4
·1785-1796
·
IF 3.502
Jianqiang Bi,Tong Wei,Linghui Shen,Fengming Yang,Chuanzhen Zhao,Mingchao Wang,Qiqian Yang,Yuxuan Lin
Upconversion (UC) luminescence modulation is quite important in controlling and processing light for active components of light sources, photoswitches, optical memories, and optical sensing devices. In this work, we reported one kind of novel phosphor, Ho 3+ /Yb 3+ -doped SrBi 4 Ti 4 O 15 ceramics, which displayed both strong UC luminescence and obvious photochromic (PC) reaction. The UC luminescence, PC effect, and the modulation of UC performance based on PC behavior were investigated in detail. By alternating visible light irradiation and thermal stimulus, the UC luminescence could be reversibly regulated. Meanwhile, the modulation was unveiled to tightly rely on the irradiation time and thermal treatment processes. Excellent reproducibility was also achieved. In addition, as an alternative method to thermal treatment, the manipulation of luminescence by electric field was also explored. Finally, the mechanism related to the UC luminescence manipulation was illustrated. The results indicate that these samples could be potentially utilized in optical data storage and anti-counterfeiting security fields.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
APPLIED PHYSICS B-LASERS AND OPTICS
·
2024
·Vol. 130
·期 3
·38
·
IF 2
Ran Qiu-Yue,Lian Yu-Long,Tang Yong,Hao Jian-Hong,Bai Yun-Feng
FIR temperature measurement based on thermally coupled levels of rare earth ions has been widely studied, but its sensitivity is limited by the thermal coupling levels’ spacing. In this letter, a transition from non-thermally coupled levels of Ho 3+ to thermally coupled levels is reported for the first time. It can effectively improve the sensitivity of temperature measurement based on thermal coupling levels. The Ho 3+ /Yb 3+ co-doped Y 2 O 3 millimeter crystals have been prepared by laser annealing. The fluorescence properties of laser-annealed Ho 3+ /Yb 3+ co-doped Y 2 O 3 millimeter crystals were investigated as a function of temperature. It was found that the I 667nm / I 549nm show non-thermal coupling below 453K, but changes to thermal coupling above 453K. The maximum relative sensitivity of I 667nm / I 549nm in thermal coupling is greater than the relative sensitivity of any known thermal coupling energy levels of Ho 3+ . It provides a new way to improve the sensitivity of thermally coupled FIR temperature measurement.
研究领域:
材料科学
·
光学传感
·
稀土掺杂
·
激光加工
·
温度测量
✓ 已验证
DOI
高影响因子
JOURNAL OF LUMINESCENCE
·
2021
·
IF 3.599
Pengfei Shuai,Libing Liao,Qingfeng Guo,Dan Yang,Ruiqi Shi,Lefu Mei
Cryolite was considered to be an ideal up-conversion host material due to its low phonon energy, which can effectively suppress the radiation-free transition process of excited state energy levels. In the present paper, a novel up-conversion material K 3 YF 6 :Ho 3+ , Yb 3+ with cryolite structure was prepared successfully using a high-temperature solid state method. The up-conversion luminescence properties of K 3 YF 6 doped with different Ho 3+ /Yb 3+ doping ratio were investigated and the optimal doping ratio were confirmed in this system. Under 980 nm excitation, Ho 3+ /Yb 3+ co-doped K 3 YF 6 revealed a strong green emission at the 541 nm, 549 nm and a weak red emission peaking at 666 nm, corresponding to the 5 F 4 , 5 S 2 → 5 I 8 and 5 F 5 → 5 I 8 transitions of Ho 3+ , respectively. All the red and green up-conversion emission of K 3 YF 6 :Ho 3+ , Yb 3+ belong to two-photon process and energy transfer from Yb 3+ to Ho 3+ simultaneously. Additionally, to understand the energy transfer and electronic transition process of the red and green light emitted, the possible luminescence mechanism were also analyzed in this paper. All the results indicate that Ho 3+ /Yb 3+ co-doped K 3 YF 6 have potential application value in green up-conversion luminescent materials.
研究领域:
材料科学
·
光学
·
发光材料
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF NON-CRYSTALLINE SOLIDS
·
2015
·
IF 1.766
Yuebo Hu,Renjun Dou,Jianbei Qiu
Upon excitation with a 980 nm laser diode (LD), the upconversion luminescence (UCL) properties of Tb 3 + /Ho 3 + /Yb 3 + tri-doped oxyfluoride silicate glasses were investigated. Five distinct emissions peaked at 489, 543, 584, 623 and 662 nm are simultaneously observed and are assigned to the electronic transitions of Tb 3 + : 5 D 4 → 7 F J (J = 6, 5, 4 and 3) and Ho 3 + : 5 F 5 → 5 I 8 , respectively. The effects of Tb 3 + and Yb 3 + concentrations on the emissions were studied. The log–log plots of the UCL intensity versus laser power show abnormal relations: the slopes are larger than those in previous reports, which could be attributed to the effect of intrinsic optical bistability (IOB) of Yb 3 + ions. In addition, the UC mechanisms were discussed in this work.
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 RAMAN SPECTROSCOPY
·
2023
·Vol. 54
·期 6
·651-661
·
IF 2.5
Pengfei Shuai,Qingfeng Guo,Libing Liao,Zhaoliang Yan,Ke Su,Yujia Wang,Lefu Mei
In this work, a method for controllable regulation of crystal form was proposed for the first time and the effects of different crystal forms on the up-conversion luminescence properties of Ho 3+ , Yb 3+ co-doped K 3 Sc 0.5 Lu 0.5 F 6 (KSLF) phosphors was explored. KSLF:Ho 3+ , Yb 3+ phosphors were synthesized by the high temperature solid-state reaction method, and X-ray diffraction (XRD) results illustrate that the compounds can obtain monoclinic phase and cubic phase at different synthesis temperatures. In addition, according to the power-dependent up-conversion luminescence (UCL) intensity, the UCL mechanism and the electronic transition process are discussed. Simultaneously, the temperature sensing behavior of the best samples with different crystal forms at different temperatures was studied by fluorescence intensity ratio technique. All the results show that KSLF:Ho 3+ , Yb 3+ phosphors show great application potential in the field of temperature sensing, and the preparation of KSLF:Ho 3+ , Yb 3+ in different crystal forms can provide a reference value for crystal design and growth.
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
·
2021
·
IF 3.08
Wenxia Wu,Daini Wang,Yihua Pan,Yuhua Yang,Peng Zhang,Shoulei Xu,Bernard A. Goodman,Wen Deng
Yttria stabilized zirconia (YSZ) single crystals doped with Tm 2 O 3 , Ho 2 O 3 , and Yb 2 O 3 were prepared by the optical floating zone method in order to investigate the effects of varying the Tm 3+ , Ho 3+ , Yb 3+ contents on the luminescence properties. All samples were shown by powder X-ray diffractometry (XRD) to be in the cubic phase at room temperature with good crystallinity , and the optical bandwidth of about 4.63 eV indicates their suitability for the development of luminescence products. The blue emission peaks from Tm 3+ following excitation with a 980 nm (1.33 eV) laser increased with Tm 3+ content reached a maximum in the crystal with 0.30 mol% Tm 2 O 3 , and then decreased with higher Tm 3+ concentrations as a result of quenching caused by electric dipole interactions. The ratio of the integral intensities of the green emission peaks at 2.42 eV (539 nm) and 2.36 eV (552 nm) indicate that the probability of the non-radiative transition from the 5 F 4 level of Ho 3+ to the 5 S 2 level decreases with increasing Tm 3+ concentration. This research also demonstrates that there was competition between Ho 3+ and Tm 3+ for the transfer of energy from excited Yb 3+ , and that there was also direct transfer of energy from Ho 3+ to Tm 3+ . Thus, in YSZ doped with a combination of rare earth ions , the luminescence properties are determined by a combination of energy transfer processes between the different types of rare earth ions, as well as those for the individual ions, and thus presents an opportunity for fine tuning emissions from such crystals to produce a new generation of materials with intense luminescence properties.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2026
·
IF 6
Liang Zhao,Jiaxin Yang,Yujia Peng,Wudeng Wang,Desheng Li,Hai Lin
High contrast is realized via switchable excitation in Ho 3+ /Yb 3+ co-doped molybdates. • Electrospun PMMA/TPU binary networks achieved fiber-welding for 400% stretchability. • Hydrophobic encapsulation with a large contact angle impedes moisture ingress. • Excellent thermal stability is verified by 90% retained emission intensity at 373 K. • Strain sensing and dual-mode encryption broaden application prospects for smart skin. Smart adaptive optoelectronic skins represent a critical foundation for next-generation wearable electronics, spurring extensive research into intelligent platforms that simultaneously harness mechanical compliance and excitation-dependent emissions to execute complex, multi-level security interactions. Pristine microcrystalline Li 2 Gd 4 (MoO 4 ) 7 : Ho 3+ /Yb 3+ phosphors display dual-mode emissions, yielding green under near-ultraviolet excitation and orange-red under 980 nm irradiation due to tailored energy transfer pathways, yet inherent structural brittleness completely prevents their direct deployment in flexible configurations. Overcoming this fundamental bottleneck relies on encapsulating these phosphors via electrospinning within a binary polymeric blend consisting of polymethyl methacrylate and thermoplastic polyurethane, yielding hybrid fibrous networks with exceptional stretchability up to 400% elongation driven by microscopic fiber-welded junctions optimizing tensile load distribution. Crucially, sophisticated multi-environmental modulation is manifested within these flexible scaffolds, where the photoluminescence intensity is dynamically governed by tensile strain due to shifting spatial densities, while this dense polymeric network maintains stable luminescence at 373 K and provides a superior hydrophobic barrier maintaining static water contact angles beyond 100°. Synergizing this strain-responsive sensing with the excitation-switchable dual-color outputs enables successful dual-functional integration of precise kinesiologic tracking and multi-level information cryptography, paving a promising way for self-supported smart skins and advanced optical information security.
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2021
·Vol. 32
·期 6
·8149-8156
·
IF 2.478
Yun Rui,Luo Li,He Jingqi,Wang Jiaxi,Li Xiaofen,Zhao Weiren,Nie Zhaogang
Lanthanide-doped system with adjustable multicolor and white up-conversion (UC) emission has been developed in GdVO 4 (GVO): Tm 3+ -Ho 3+ -Yb 3+ /-Nd 3+ phosphors, which are fabricated via a facile solid-state reaction. Herein, we study their phase structures and the Ho 3+ concentration effect on their up-conversion emission. Under 980 nm excitation, the Tm 3+ -Ho 3+ -Yb 3+ tri-doped GVO phosphors exhibit intense luminescence combined with red, green and blue (RGB) emission and the successive energy transfer between Tm 3+ -Ho 3+ -Yb 3+ ions causes a slight shift in the color coordinates of samples with different doping concentrations. Under 808 nm excitation, the color coordinate of the optimum GVO: Tm 3+ -Ho 3+ -Yb 3+ -Nd 3+ phosphor is located at (0.3277, 0.3433), which is closest to the ideal white light emission corresponding to (0.3333, 0.3333). Therefore, it is proved that these phosphors provide potential applications in the fields of displays, lasers and optical telecommunication.
研究领域:
材料科学
·
光学
·
光子学
✓ 已验证
DOI
高影响因子
JOURNAL OF RARE EARTHS
·
2024
·
IF 5.2
Yuebin Xu,Aierpati Taximaimaiti,Ru Xie,Hairegu Tuxun,Min Yin,Aierken Sidike
Upconversion luminescent (UCL) materials have broad application prospects in the field of temperature sensing; thus, improving the luminescence performance and temperature measurement sensitivity of upconversion phosphors is highly important. In this study, SrAl 2 Si 2 O 8 with good thermal stability was doped with Ho 3+ and Yb 3+ , and the optimal concentration was determined to be SrAl 2 Si 2 O 8 :1%Ho 3+ , 12%Yb 3+ (in mole fraction). A series of (Sr 0.87‒ x Ba x )Al 2 Si 2 O 8 :1%Ho 3+ , 12%Yb 3+ phosphor samples was prepared by using a cationic substitution strategy and further doping Ba 2+ to replace the Sr 2+ lattice in the matrix. The results show that the introduction of Ba 2+ effectively replaces Sr 2+ and significantly increases the upconversion fluorescence emission intensity of SrAl 2 Si 2 O 8 :1%Ho 3+ , 12%Yb 3+ by approximately 2.9 times. The temperature sensing properties of SrAl 2 Si 2 O 8 :1%Ho 3+ , 12%Yb 3+ and Sr 0.37 Ba 0.50 Al 2 Si 2 O 8 :1%Ho 3+ , 12%Yb 3+ were investigated. The Ho 3+ -based 5 F 5 and 5 S 2 / 5 F 4 nonthermal coupled energy level fluorescence intensity ratio (FIR) techniques in the Ba 0.37 Sr 0.50 Al 2 Si 2 O 8 :1%Ho 3+ , 12%Yb 3+ phosphors show a maximum temperature measurement absolute sensitivity of 4.32%/K at 573 K and a maximum relative sensitivity of 1.08%/K at 373 K; these values are 5.8 and 3.2 times greater, respectively, than that of the non-Ba 2+ -doped SrAl 2 Si 2 O 8 :1%Ho 3+ , 12%Yb 3+ phosphor. These results not only confirm the effectiveness of the cation substitution strategy in enhancing the upconversion luminescence performance and temperature sensing characteristics but also provide a scientific basis for the design of high-performance optical temperature sensors.
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
ACS Sustainable Chemistry & Engineering
·
2022
·
IF 9.224
Lin Yang,Hao Wu,Guo-hui Pan,Liangliang Zhang,Huajun Wu,Zhendong Hao,Feng Liu,Jiahua Zhang
The luminescence thermal enhancement (LTE), in lanthanide-doped upconverting nanocrystals (UCNCs), has attracted extensive attention for its applications in anticounterfeiting, temperature sensing, and so on. Some mechanisms for LTE were proposed, including thermally induced water desorption from the surface of UCNCs, but conclusive evidence is absent for any of the mechanisms. Here, vacuumizing is employed in the experiment for the LTE in NaYF4:Ho3+/Yb3+ UCNCs, and significantly promoted LTE is observed. The 300–450–300 K temperature cycling experiment in vacuum shows continuous luminescence enhancement without luminescence intensity recovery as in the cooling process in moisture air, indicating the effect of water desorption because water readsorption is blocked in vacuum. It is found that the Ho3+ 5I6 level can be deexcited by direct long-range energy transfer to water adsorbed at the surface of nanocrystals due to resonant coupling between the Ho3+ 5I6 → 5I7 transition and the −OH vibration of water. As a result, water desorption suppresses the 5I6 depopulation and thus enhances the luminescence of Ho3+. Finally, the regulation of upconversion LTE is realized by adjusting the size of nanocrystals and Ho3+ or Yb3+ concentrations. Our findings indicate that the vacuumizing technique is an effective method to distinguish water-desorption-induced LTE. This work deepens the understanding of LTE and offers insights into the regulation of LTE.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
JOURNAL OF LUMINESCENCE
·
2017
·
IF 2.686
Haoyue Hao,Hongyu Lu,Guanghong Ao,Yinglin Song,Yuxiao Wang,Xueru Zhang
The nearly pure green and red emissions of Ho 3+ /Yb 3+ co-doped Gd 2 (MoO 4 ) 3 were realized by tri-doping Eu 3+ and Ce 3+ , respectively. The Ho 3+ /Yb 3+ co-doped Gd 2 (MoO 4 ) 3 powder, radiating intense green and red emissions, was prepared by a typical sol-gel method. Under the excitation of 980 nm laser, the red-to-green ratio was tuned from 0.2 to 4 as the concentration of Eu 3+ changed from 6 to 0 mol%, attributed to the energy transfer processes between Ho 3+ and Eu 3+ . Meanwhile, the red-to-green ratio altered from 4 to 20 as the concentration of Ce 3+ changed from 0 to 20 mol% via the cross relaxing processes between Ho 3+ and Ce 3+ . The prepared phosphors, possessing large tuning range of red-to-green ratio and resisting high temperature, can be potentially applied to colorful display and solid-state lighting.
研究领域:
材料科学
·
光学材料
·
光子学
·
固态照明
·
显示技术
✓ 已验证
DOI
高影响因子
INORGANIC CHEMISTRY
·
2022
·
IF 5.436
Huocheng Lv,Laihui Luo,Weiping Li,Peng Du
To ameliorate the inherent thermal quenching behaviors of upconverting materials, a series of Ho3+/Yb3+-codoped Al2Mo3O12 (i.e., Al2Mo3O12:Ho3+/2xYb3+) microparticles were developed. Upon excitation at 980 nm, intense upconversion (i.e., UC) emissions arising from Ho3+ are observed, and their optimal states occur at x = 0.09. Besides, the UC mechanisms of these generated emissions from 5F4/5S2 and 5F5 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 5F4/5S2 levels decrease as the temperature increases, while that of the UC emission from the 5F5 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 Al2Mo3O12:Ho3+/2xYb3+ 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 5F5 → 5I8 to (5F4,5S2) → 5I7 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 Al2Mo3O12:Ho3+/2xYb3+ microparticles are promising luminescent materials for multimode visual optical thermometry.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）