JOURNAL OF ALLOYS AND COMPOUNDS
·
2021
·
IF 5.316
Yuzhen Wang,Chuandong Zuo,Chaoyang Ma,Wanggui Ye,Chong Zhao,Zhe Feng,Yanbin Li,Zicheng Wen,Chong Wang,Xiaofei Shen,Xuanyi Yuan,Yongge Cao
This work focused on influences of Sc 3+ dopants on local site symmetry and ligand field of Er 3+ activators as well as its up-conversion luminescence performances sensitized by Yb 3+ ions in NYTiO 4 (NYT). The structure analysis and Judd-Ofelt calculation confirmed that doping Sc 3+ ions could lower site symmetry as well changed the ligand field around Er 3+ ions. The introduction of Sc 3+ ions induced variations of crystal lattices , regulated distances between Er 3+ ions and Er 3+ or Yb 3+ ions, and thus influenced the up-conversion luminescence properties . Besides, time-resolved decay curves figured out the great enhancement of lifetime and luminescence quantum efficiency for both green and red emissions due to Sc 3+ dopants. For optical temperature sensitivity, thermally coupled levels (TCLs) for blue emission 4 F 5/2 / 4 F 7/2 → 4 I 15/2 was studied for the first time. Besides, TCLs for violet emission 4 G 11/2 / 2 H 9/2 → 4 I 15/2 as well as green emission 2 H 11/2 / 4 S 3/2 → 4 I 15/2 were also recorded. By tri-doping Sc 3+ ions into NYT: Yb/Er, both absolute sensitivity and relative sensitivity of above three TCLs were improved with temperature uncertainty decreasing.
研究领域:
材料科学
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发光材料
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固态化学
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光学物理
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稀土掺杂
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DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2023
·
IF 8.4
Xiaofan Ge,Zuoling Fu
The rational exploration of lanthanide-doped phosphors is of great significance for realizing precise optical temperature sensing and information security applications. Here, triple-wavelength responsive Ba2Ga2GeO7:Er3+ phosphors were synthesized by a solid-state method, and the samples gave highly pure green emissions under 808 and 382 nm excitations. Within the temperature range from 313 to 573 K, the corresponding temperature sensing performance based on the fluorescence intensity ratio was estimated, and the maximum relative sensing sensitivities were determined to be 0.97%, 1.20%, and 1.19% K–1 for the 980, 808, and 382 nm excitations, respectively, indicating the title materials are promising for use in temperature sensors. Furthermore, the introduction of Tb3+ enables the materials to realize down conversion luminescence and long persistent luminescence, which greatly enrich the luminescence phenomena of the samples. Based on the abundant emission modes, novel information encryption strategies of digital displays and binary digital-ASCII multiplex codes are proposed, which provide reliable guidance on advanced visualized information encryption.
研究领域:
材料科学
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光学传感
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发光材料
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信息安全
·
光子学
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DOI
高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2017
·Vol. 100
·期 7
·3061-3069
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IF 2.841
Shaohua Fan,Shikai Wang,Hongtao Sun,Shiyu Sun,Guojun Gao,Lili Hu
We report efficient dual-mode up-conversion (UC) and down-shifting (DS) emission in a single Yb 3+ /Er 3+ -co-doped β-NaYF 4 microcrystals with controlled morphology and size via a simple Na + ion-exchange modification (IEM) method. IEM well preserves the crystal structure and monodispersed morphology of hydrothermal-synthesized β-NaYF 4 . Meanwhile, IEM gives rise to the significant enhancement of UC emission intensity up to 3800 times and strongly enhanced DS emission intensity of Er 3+ and Yb 3+ by several times in β-NaYF 4 :Yb 3+ ,Er 3+ microcrystals. IEM also strongly prolongs the DS emission lifetimes of Er 3+ and Yb 3+ in visible and near-infrared region. The enhanced UC and DS emission intensities and prolonged lifetimes in β-NaYF 4 :Yb 3+ ,Er 3+ are mainly ascribed to the dispersing of localized Yb 3+ and Er 3+ clusters during IEM.
研究领域:
材料科学
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光子学
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纳米技术
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光学材料
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2016
·Vol. 42
·期 8
·9571-9576
·
IF 2.758
Yiguang Jiang,Jintai Fan,Benxue Jiang,Xiaojian Mao,Chunlin Zhou,Long Zhang
Transparent Er 3+ -doped CaF 2 –silica glass ceramics were prepared by the direct physical introduction of Er 3+ doped CaF 2 nanocrystals into acid-catalyzed sol–gel silica glass . The physical methods of ball milling , ultrasonic baths, and stirring were investigated to disperse Er 3+ doped CaF 2 nanocrystals in the silica sols. The CaF 2 –silica sol mixture went through gelation and heat-treatment to form Er 3+ -doped CaF 2 –silica glass ceramics. The morphology of Er 3+ doped CaF 2 in silica glass did not change after heat-treatment at 600 °C for 10 h. The experimental results showed that Er 3+ doped CaF 2 in the glass ceramic prepared with the assistance of ball milling possesses the best dispersity and homogeneity. The highest in-line transmittance of the glass ceramic reached up to 85% in visible region. Glass ceramic exhibits efficient up-conversion emissions corresponding to the Er 3+ : 4 F 9/2 → 4 I 15/2 transition and long lifetime of 4 F 9/2 level (1.73 ms) under 980 nm excitation.
研究领域:
材料科学
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光学材料
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纳米技术
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光子学
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2026
·
IF 6
Lijun Chen,Zhengce An,Liping Lu,Yangyang Zhang,Yuee Chen,Haiying Sun
The most effective approach to regulating the color of upconversion luminescence is through doping with lanthanide ions that possess the ability to regulate energy processes, which holds significant importance for the application of upconversion luminescent materials in the domains of optical data storage and anti-counterfeiting technology. In this work, a multi-component upconversion luminescent material NaYF 4 : Er 3+ , Yb 3+ , Ce 3+ with near-infrared response and Er 3+ doping ranging was prepared by low-temperature combustion synthesis. Due to the unique 4f 13 electronic configuration of Yb 3+ , the probability of Er 3+ falling into the trap energy level increases, thereby reducing the emission of Yb 3+ . The emission color of Er 3+ can be altered by doping with Ce 3+ , which is different from the enhancement of red emission by Ce 3+ in other studies. In addition, the different luminescent properties of the samples under different wavelengths of excitation were studied, and a fluorescence security mode was designed to demonstrate its potential application value in anti-counterfeiting and hiding important information. This research offers new insights into the mechanisms underlying the upconversion phenomenon in Er 3+ through multi-ion doping, and provides new approaches for the design of photochromic upconversion phosphors.
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DOI
高影响因子
MATERIALS RESEARCH BULLETIN
·
2026
·
IF 5.8
Yunong Wang,Yiting Wang,Bo Jiang,Ji Sun,Huiting Mao,Jindou Huang,Wei Zhang,Ruinian Hua
A dual-channel energy transfer in Ag + /Er 3+ co-doped Cs 2 NaBiCl 6 was revealed. • The energy transfer from STE to Er 3+ is a phonon-assisted cooperative foster energy transfer. • White LEDs with a single Ag + /Er 3+ co-doped Cs 2 NaBiCl 6 phosphors were achieved. Herein, the photoluminescence of hydrothermally synthesized Cs 2 NaBiCl 6 is controlled by Ag + and Er 3+ co-doping, and a dual-channel ET mechanism is proposed. When doped with Ag + , the photoluminescence of Cs 2 NaBiCl 6 increases by as much as 24.7 times. We have discovered that Ag + can reduce the band gap width, break the parity symmetry of the transition, and significantly enhance the strength of STE. Futher, new luminescence center was introduced in Ag + /Er 3+ co-doped Cs 2 NaBiCl 6 . Femtosecond transient absorption (fs-TA) spectroscopy data indicate that there exists a dual-channel ET process from (Ⅰ) the host to Er 3+ and from (Ⅱ) the host to the self-trapping exciton state and then back to Er 3+ . As the bridge of ET, Ag + alters the local symmetry of the Er 3+ site, significantly facilitating the energy transfer from STE to Er 3+ , and increasing the probability of Er 3+ radiation recombination. Futhermore, white LEDs with a single host phosphors have been achieved. Download: Download high-res image (145KB) Download: Download full-size image To address the problem of low photoluminescence efficiency in double perovskite materials, Ag + and Er 3+ were doped into Cs 2 NaBiCl 6 to enhance luminescence. Doping with Ag + increased the photoluminescence of Cs 2 NaBiCl 6 by 24.7 times. The energy transfer mechanisms among ns 2 metals, transition metals, and rare earth ions were investigated, and a dual-channel energy transfer mechanism was proposed. Furthermore, white LEDs using a single phosphor have been achieved, with color coordinates of (0.327, 0.338). This work provides a new perspective for designing novel double perovskites to realize unique dual-channel energy transfer and white LEDs.
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产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
·Vol. 51
·期 26
·47599-47610
·
IF 5.6
Weijie Zhu,Weichao Wang
The rapid expansion of data-intensive technologies such as 5G, AI, and cloud computing is pushing optical communication systems to their limits, necessitating the development of advanced materials to extend bandwidth into the L- and U-bands. Fluoro-sulfo-phosphate (FSP) glasses, owing to their multi-anionic compositions and tunable network structures, offer a promising platform for next-generation broadband fiber amplifiers. In this work, a mixed-cation approach employing K + and Ba 2+ is employed to manipulate the local structural environment and enhance glass-forming ability, lifetime (8.7–9.22 ms for Er-doped, ∼10 ms for Er 3 + /Yb 3+ co-doped), emission cross-section (0.59-0.70 × 10 − 20 cm 2 ), energy transfer efficiency (∼85 %), and thermal quenching resistance. Despite their similar sizes and electronegativities, K + and Ba 2+ exhibit contrasting field strengths and polarizabilities, enabling a controlled balance between network connectivity and local disorder. Thermodynamic modeling and experimental results confirm that the introduction of mixed cations significantly broadens the glass-forming region. The addition of AlF 3 further strengthens the network, allowing for the preparation of stable K/Ba-FSP glasses with improved mechanical, thermal, and chemical properties. Spectroscopic analysis reveals a substantial enhancement in L-band emission efficiency and gain characteristics, with performance improvements ranging from 30 % to 150 % over conventional glass hosts. These findings position K/Ba-FSP glasses as a robust and high-performance candidate material system for broadband rare-earth-doped fiber amplifiers and lasers.
研究领域:
材料科学
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光学工程
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无机非金属材料
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光通信
·
激光技术
✓ 已验证
产品关联
DOI
高影响因子
Nanoscale
·
2017
·Vol. 9
·期 22
·7666-7673
·
IF 7.367
Xin Su,Xiaoqian Sun,Suli Wu,Shufen Zhang
Photonic crystals (PCs) have long been considered effective for tuning upconversion luminescence due to their photonic band gap (PBG) and the redistribution of density of optical states (DOS). Although the emission intensity can be changed obviously by the PC effect, rarely an obvious lifetime change consistent with theory is observed due to the low refractive index of PS or SiO2 spheres in the commonly used PCs. Herein, CdS/NaYF4:Yb3+,Er3+ composite PCs with a high refractive index contrast are fabricated in one step with upconversion nanoparticles filled inside CdS PCs. When the upconversion emission peak lies at the edge of the PBGs of the composite PCs, a dramatic decrease in lifetime by 28% and 41% is observed for the green and red emissions, respectively. At the same time, obvious emission intensity enhancements are also observed. In contrast, PS PCs with a low refractive index contrast show a slight effect on the lifetime of upconversion luminescence with their emission peak at the edge of the PBGs. Our results agree well with theory and prove that a sufficiently large refractive index contrast is necessary for PCs to dramatically tune the luminescence lifetime and intensity simultaneously.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
PubMed
高影响因子
Energies
·
2024
·Vol. 17
·期 6
·1397
·
IF 3
Yuanlin Liang,Haisheng Chen,Dianmeng Dong,Jiaxing Guo,Xiaona Du,Taiyu Bian,Fan Zhang,Zhenping Wu,Yang Zhang
Gallium oxide (Ga2O3) is an emerging wide bandgap semiconductor promising a wide range of important applications. However, mass production of high-quality crystalline Ga2O3still suffers from limitations associated with poor reproducibility and low efficiency. Low-temperature-grown amorphous Ga2O3demonstrates comparable performance with its crystalline counterparts. Lanthanide Er3+-doped Ga2O3(Ga2O3: Er) possesses great potential for developing light-emitting devices, photodetectors, solid-state lasers, and optical waveguides. The host circumstance can exert a crystal field around the lanthanide dopants and strongly influence their photoluminescence properties. Here, we present a systematical study of the impact of amorphous-to-crystalline transition on the upconversion photoluminescence in Ga2O3: Er thin films. Through controlling the growth temperature of Ga2O3: Er films, the upconversion luminescence of crystalline Ga2O3: Er thin film is strongly enhanced over 100 times that of the amorphous Ga2O3: Er thin film. Moreover, the variation of photoluminescence reflects the amorphous-to-crystalline transformation of the Ga2O3: Er thin films. These results will aid further designs of favorable optoelectronic devices integrated with lanthanide-doped Ga2O3thin films.
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DOI
高影响因子
ACS Applied Nano Materials
·
2023
·
IF 5.9
Yue Wu,Na Liu,Xiao-Xia Ren,Wen-Chao Zhang,Jing Qian
Combination therapy could significantly improve the therapeutic effect of tumors. However, due to the lack of reasonable integration of different treatment modes, it is difficult to maximize the effect of combination treatment. To solve this problem, by adjusting the dosage of NH4F/NaOH, we developed NaTmF4:0.5%Er3+@NaLuF4 upconversion nanoparticles with strong near-infrared luminescence. On this basis, nanocarriers (USFH-CI) encapsulated with high-loading (33.35%) Fe(acac)3, wrapped by human serum albumin, and grafted with cinnamic aldehyde (CA) and the IR780 photosensitizer were constructed. The dense extracellular matrix (ECM) in tumor tissues prevented the drug from diffusing into the tumors. Once USFH-CI nanocarriers were delivered to the tumor area, CA pH-responsively released H2O2, which promoted photothermal therapy (PTT) and photodynamic therapy (PDT) of IR780 driven by upconversion luminescence. A large number of reactive oxygen species (ROS) were generated, which led to the disintegration of the ECM and penetration into the tumors. Then, abundant Fe3+ consumed GSH to generate ample GSSG and Fe2+, which enhanced the sensitivity of tumor cells to oxidative stress, thus leading to the accumulation of lipid peroxide (LPO) and finally inducing ferroptosis. At the same time, substantial H2O2 and Fe2+ triggered off the Fenton-like reaction, releasing affluent free radicals. Beyond that, PTT of IR780 further promoted the Fenton-like reaction, and the generation of ROS was amplified. Free radicals generated in the process of ferroptosis destroyed heat shock protein produced by PTT, which solved the self-protection of cancer cells against heat. In situ ROS generation by the PTT/PDT of IR780 and the Fe2+ Fenton-like reaction further promoted the accumulation of LPO and ferroptosis as well as deep penetration, which maximized the effect of combination treatment and achieved a high tumor inhibition rate (84.71%). Also, there was negligible damage to normal tissues with good tumor targeting and digestive metabolism.
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产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
·
IF 6.2
You Li,Sai Xu,Qun Zhang,Yuefeng Gao,Xizhen Zhang,Yongze Cao,Hongquan Yu,Xiangping Li,Baojiu Chen
Inorganic lead-free halide perovskites are quite desirable for various applications due to their outstanding optoelectronic performances. However, excitation wavelength-dependent multi-emission in a single luminophore is less reported. In this study, Sb 3+ /Bi 3+ /Er 3+ codoped Cs 2 Ag 0.1 Na 0.9 InCl 6 lead-free double perovskite with upconversion and downshifting luminescence modes has been developed. The double perovskite displays a dual-emission band located at 450 nm and 580 nm under excitation of 355 nm. The blue emission originates from self-trapped excitons (STEs) in [SbCl 6 ] 3- octahedrons, while the yellow emission comes from STEs between states localized in the BiCl 6 and AgCl 6 octahedra. Interestingly, the phosphor’s emission can be dynamically adjusted by excitation wavelength and Sb 3+ doping concentration. Not only that, the phosphor can also generate upconversion green light upon the irradiation of 980 nm lasers. The multi-excitation wavelength characteristics of this perovskite make it very suitable as a material for anti-counterfeiting and encoded information storage, and the excellent temperature stability and moisture resistance of this perovskite also make it more promising.
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产品关联
DOI
高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
·
2021
·
IF 3.498
Pengfei Shuai,Qingfeng Guo,Libing Liao,Maobi Xiang,Ke Su,Lefu Mei
Cryolite has been considered as an appropriate host for up-conversion materials due to its low phonon energy, wide light transmission range, easy to form waveguide and stable structure. In this paper, a series of up-conversion materials Cs 3 YF 6 : Er 3+ , Yb 3+ with cryolite structure were prepared by high-temperature solid-phase method. The structure, morphology, element composition and up-conversion luminescence properties of as-prepared samples were characterized. In addition, the number of photons absorbed during the up-conversion process and the possible up-conversion luminescence mechanism are analyzed in detail. Under the excitation of 980 nm, the Cs 3 YF 6 : Er 3+ , Yb 3+ sample emits strong green light visible to the naked eye. Simultaneously, the maximum absolute sensitivity (S a ) and relative sensitivity (S r ) were calculated. All the results indicated that Cs 3 YF 6 : Er 3+ , Yb 3+ has potential applications in the fields of green light display and temperature sensing.
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产品关联
DOI
高影响因子
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