JOURNAL OF LUMINESCENCE
·
2019
·
IF 2.961
Shiliang Mei,Xian Wei,Dan Yang,Danlu Su,Wu Yang,Guilin Zhang,Zhe Hu,BoBo Yang,Hanqing Dai,Fengxian Xie,Wanlu Zhang,Ruiqian Guo
Cadmium-free InP quantum dots (QDs) exhibit many unique optical properties , and show great promise as light emitting materials. In this work, a series of high-efficient and color-tunable transition metal ions (Cu, Mn) single- and co-doped InP/ZnS QDs with the average size of 3.2–3.7 nm, were firstly prepared via a nucleation-doping method in an organic synthetic route. These three kinds of doped InP/ZnS QDs all exhibit dual emission with one peak position around green region owing to the intrinsic state and the other peak position around orange-red region resulted from dopant emission, the relative intensity of which can be effectively tuned by varying Cu or Mn dopant concentration. The dopant emission of Cu doped InP/ZnS QDs from 572 to 696 nm can be realized via increasing Cu dopant concertration from 0.25% to 10%, while the peak position of dopant emission in Mn doped InP/ZnS QDs system remains unaltered as Mn dopant concentration increasing. Besides, the interaction mechanism of Cu and Mn dopant in co-doped InP/ZnS QDs system was investigated with steady-state and time-resolved PL spectroscopy measurements. The results reveal that the dopant emission is dominated by Cu doping rather than Mn doping. These unique results in doped InP/ZnS QDs would help to understand the fundamental aspects of doping, and the dual-emissive and color-tunable optical properties of single-phase doped InP/ZnS QDs will endow them with great promise as color-converting materials for use in solid-state lighting.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
POLYHEDRON
·
2025
·
IF 2.6
Qian Du,Chang-Sheng Wang,Yu-Guo Yang,Wei Zhao,Xiao-Na Shen,Bing Liu,Yuan-Yuan Zhang,Hua-Di Zhang,Hua-Jian Yu,Cheng-Cheng Qiu,Xian-Shun Lv,Rui Zhang,Xu-Ping Wang
Some Tb 3+ /Eu 3+ doped SrGdGa 3 O 7 (SGGO) phosphors were fabricated, achieving multi-color tunability through the addition of a sensitizer. The experimental results indicate that the doped ions are uniformly distributed, with no impurity phases detected. In SGGO-based phosphors, Eu 3+ ions serve as activators and exhibit an optimal luminescence transition level of 5 D 0 → 7 F 4 . When Tb 3+ ions are used as the sensitizer and at a specific concentration, the luminescence color transition of green → orange → red as the content of Eu 3+ enhances. Analysis of the decay lifetime curves reveals that Tb 3+ → Eu 3+ energy transfers occur in the co-doped SGGO phosphors, with the mechanism identified as quadrupole–quadrupole interaction. This article investigates the specific energy transfer processes involved. The optimum content of Eu 3+ is ascertained as 0.03. Under the excitation at 375 nm, the SGGO based phosphor containing 0.06 Tb 3+ and 0.03 Eu 3+ exhibits CIE coordinates of (0.5000, 0.4397).
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Electronic Materials
·
2023
·
IF 4.7
Hanyu Xu,Mengmeng Dai,Kejie Li,Aijun Li,Tianqi Sheng,Zuoling Fu
Luminescence intensity ratio (LIR) thermometry based on distinct up-conversion luminescence centers was established in Cs-based fluorides. By contrasting the nonthermally coupled luminescence intensity of Er3+/Ho3+/Tm3+, it is possible to determine which kind of up-conversion emission ion is more suited for the perovskite-like Cs3YF6 material. The best option is Er-doped Cs3YF6 samples with a relative sensitivity (Sr) of 0.96% K–1, according to a comparison of the LIR fitting findings. However, the extremely high absolute sensitivity (Sa) in Cs3YF6: Yb, Tm suggests that Sa is not trustworthy in the LIR temperature evaluation system according to the temperature resolution δT. This work provides recommendations for the LIR temperature sensing design for comparable Cs-based fluorides while minimizing time and expense.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
LANGMUIR
·
2025
·
IF 3.9
Lei Jiang,Yaoyu Du,Yaying Tan,Jin Wang,Xinyue Zhang,Xueqiang Liu,Ning Ma,Alaa S. Abd-El-Aziz
As an inorganic phosphor, CaZnOS with highly efficient and stable emission exhibits strong potential in the fields of lighting display and information encryption. Although it has only a single luminescent region after sintering, it is anticipated that the unique differences in excitation and emission wavelengths of luminescent ions can be exploited to achieve information encryption by doping various luminescent ions. The hydrophilicity and water resistance of CaZnOS make it a suitable candidate for incorporation into hydrogel systems. In this study, we present a strategy for combining inorganic phosphors with hydrogel materials to prepare fluorescent hydrogels, utilizing poly(vinyl alcohol) (PVA) as a matrix to stabilize CaZnOS. The luminescence color range of the hydrogels (orange, red, dark red, and blue) can be conveniently adjusted by regulating the doping concentrations of Mn2+ and Bi3+ in the CaZnOS hosts. The prepared fluorescent hydrogels can be customized into various shapes and arranged to form arrays of encrypted information, which are essential for high-performance anticounterfeiting applications. We anticipate that this strategy will facilitate the development of diverse types of fluorescent hydrogels and enhance the security of anticounterfeiting applications.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2017
·
IF 3.133
Mingshun Yang,Jinjun Ren,Ruili Zhang
Water-soluble hexagonal NaScF 4 :Yb/Er upconversion microcrystals (UCMCs) were synthesized using the hydrothermal method . The upconversion photoluminescence properties of NaScF 4 :xYb/2%Er microcrystals (x = 4–20%) were characterized under a 980-nm-wavelength laser excitation. The dependence of red/green (R/G) ratio on the concentration of Yb 3+ ions was investigated. The local environments of dopant ions (Yb 3+ , Er 3+ ) in NaScF 4 were studied using multiple solid-state nuclear magnetic resonance (NMR) techniques. The 19 F single pulse and 19 F{ 23 Na} and 19 F{ 45 Sc} rotational echo double resonance (REDOR) techniques proved that the dopant rare-earth ions (Yb 3+ , Er 3+ ) preferred to substitute Na + rather than Sc 3+ ions. Such solid-state NMR techniques provide a novel approach to study new phosphors.
研究领域:
材料科学
·
光物理学
·
核磁共振技术
✓ 已验证
产品关联
DOI
高影响因子
DYES AND PIGMENTS
·
2018
·
IF 3.767
Peng Li,Linna Guo,Zongxue Zhang,Tiesheng Li,Penglei Chen
A series of Bi 2 O 3 :Yb 3+ /Er 3+ phosphors with different phases and morphologies were obtained by tuning doping ions, which played a vital role in the upconversion luminescence (UCL). Both Er 3+ single doped and Yb 3+ /Er 3+ co-doped samples exhibit narrow, nearly pure red emission whether excited by 980 nm or 1550 nm. Compared to the sum of emission intensities excited by two single-wavelength (980 nm and 1550 nm) separately, the red emission from Bi 2 O 3 :Yb 3+ /Er 3+ with uneven distributed nanometer or micron blocky particles structure excited by two-wavelength simultaneously was enhanced by a factor of 2.41. To further improve the UCL intensity, optical-inert ions such as Na + , Ca 2+ and Gd 3+ were doped into this system. Compared to the optical-inert ions free sample (Bi 2 O 3 :15% Yb 3+ , 2% Er 3+ ), the pure red UCL in Bi 2 O 3 :15% Yb 3+ , 2% Er 3+ with 6% Na + , 2% Ca 2+ and 4% Gd 3+ doping is enhanced by 223.83 or 203.73 times under 980 or 1550 nm excitation, respectively. Meanwhile, the UCL mechanism under the multiwavelength was investigated in detail and its model of UC emission process was proposed.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
JOURNAL OF LUMINESCENCE
·
2024
·
IF 3.3
Yuanyuan Hu,Dangli Gao,Jia Yu,Xue Yang,Xiangyu Zhang,Sining Yun,Xiaojun Wang
Conventional persistent luminescent phosphors face a significant challenge in developing a single material for multi-color anti-counterfeiting. In this study, a wide range of Cr 3+ activated gallium germanate-based persistent phosphors are successfully synthesized using high-temperature solid phase approach. By incorporating Cr 3+ and Er 3+ as dual emitting centers, and utilizing Yb 3+ as a sensitizer and electron traps, the resulting phosphors exhibit an exceptional combination of photoluminescence , up-conversion luminescence, persistent luminescence, photo/thermo-stimulated luminescence, followed by photo-stimulated persistent luminescence in a single material system. Beyond its multi-mode emissions, the luminescence color output can be conveniently controlled by adjusting annealing time, Yb 3+ ion doping concentration, excitation wavelength, or excitation power. A systematic study of trap distribution related to PersL has been conducted by regulating annealing temperature, time, doping concentration and type. The responding multi-mode luminescent mechanisms are also proposed. Particularly, these phosphors demonstrated outstanding performance as security labels in advanced anti-counterfeiting applications. This research holds the potential to inspire the design and development of more intricate luminescence anti-counterfeiting materials and technologies.
研究领域:
材料科学
·
光学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF LUMINESCENCE
·
2018
·
IF 2.732
Dandan Ju,Feng Song,Yingdong Han,Wenjing Cui,Feifei Song,Lisa Liu,Aihua Zhou,Xueqin Wang,Shujing Liu
Trivalent lanthanide ion (Ln 3+ ) doped UC materials can emit visible light under near-infrared (NIR) excitation due to anti-stokes shift and have received wide attention. In this paper, we presented a new strategy to synthesize the uniform and smooth microstructures (rodlike and tubular) based on hexagonal phase NaYF 4 microcrystals . Moreover, we systematically discussed the method of enhancing the upconversion (UC) luminescence intensity via co-doping the ions with different valences (Li + and Lu 3+ ) in order to tailor the environment around lanthanide ions. The UC intensities in the two microstructures were significantly improved. The results suggested the great application potential of tubes and rods of β-NaYF 4 microcrystals in anti-counterfeiting, laser media, photonic crystals , and waveguides .
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Cong He,Bing Li,Chunwen Ye,Meng Wu,Yanjie Zhang
Multi-modal strategies for optical information storage have received a lot of attention to meet the increasing security requirements. In this case, long persistent luminescence (LPL) phosphors with different dopant ions were obtained by introducing Dy 3+ and Ho 3+ ions into the BaSi 2 O 5 :Eu 2+ phosphor to adjust the distribution and depth of the trap centers. The generation of the pure phase BaSi 2 O 5 was confirmed by X-ray diffraction (XRD) and XRD Rietveld refinement . The peak emission of BaSi 2 O 5 : Eu 2+ phosphor is about 500 nm with 313 nm excitation. Both BaSi 2 O 5 : Eu 2+ , Dy 3+ , and BaSi 2 O 5 : Eu 2+ , Ho 3+ phosphors exhibit emission characteristics of Eu 2+ ions. The trap depths of the three phosphors are different by Gaussian fitting of thermoluminescence (TL) curves, and the depth of BaSi 2 O 5 : Eu 2+ , Dy 3+ phosphor can reach 1.070 eV. Typically, the flexible luminescent film based on BaSi 2 O 5 : Eu 2+ phosphor can be written optical pattern using 365 nm ultraviolet (UV) light, such as "DL" and "fireworks" patterns, and subsequently read out by thermal or infrared light stimulus. Further, a strategy for encryption and decryption of dynamic optical information in Morse code has been developed using BaSi 2 O 5 : Eu 2+ , BaSi 2 O 5 : Eu 2+ , Dy 3+ , and BaSi 2 O 5 : Eu 2+ , Ho 3+ phosphors, indicating the prospective use in optical information security.
研究领域:
材料科学
·
光学工程
✓ 已验证
DOI
高影响因子
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
·
2023
·Vol. 332
·期 4
·1303-1314
·
IF 1.6
Xiong Lingshan,Wang Youqun,Cui Wenzheng,Chen Lei,Luo Qie,Cao Xiaohong,Liu Yunhai
Amorphous titanium phosphates (ATP) doped with NH 4 + , K + , Na + , and Li + ions (ATP-M, M = NH 4 , K, Na, and Li) were prepared by a co-precipitation method. The SEM&EDS, TGA, XRD characterizations displayed that ATP-M was successfully synthesized, and the doping of NH 4 + , K + , Na + , and Li + ions did not change the crystal form of ATP. The results revealed that the optimum pH value for U(VI) extraction on ATP-M was determined to be 5.0. Moreover, the saturated adsorption capacity obtained by the Langmuir equation for ATP-NH 4 , ATP-K, ATP-Na, and ATP-Li was 505.1, 366.1, 273.3, and 144.1 mg g −1 , respectively. Furthermore, the interaction between ATP-M and U(VI) was discussed. In short, ATP-NH 4 may be an effective adsorbent to remove of U(VI) in wastewater due to its high adsorption ability.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
JOURNAL OF NANOPARTICLE RESEARCH
·
2013
·Vol. 15
·期 4
·1-9
·
IF 2.175
Jia Li-Ping,Yan Bing,Zhang Qiang
A high temperature solution system with BaCO 3 /RECl 3 ·xH 2 O in oleic acid/1-octadecene has been developed to prepare barium rare earth fluoride nanocrystals: tetragonal phase of BaREF 5 (RE = Pr, Nd, Eu, Tb, Dy, Tm, Lu, Y), pure cubic phase Ba 2 REF 7 (RE = La, Sm, Ho, Er, Yb), and BaREF 5 (RE = Ce, Gd) colloidal nanocrystals. In addition, it is proved that the functionalization of these nanocrystals by means of doping with Eu, Tb, and Yb, Er/Tm ion pair can obtain red, green, and visible-to-the-naked-eye green/blue upconversion emissions.
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 RARE EARTHS
·
2023
·
IF 4.9
Guofang Zhang,Xu Jianyi,Sun Shilong,Li Yiming,Liu Zhuocheng,Guo Ruihua,Yang Zhiyong,Bai Lu,Zhang Yanghuan
Hydrothermal-sintering method was employed to obtain pure and Li, Co, Mn, Cu and Zn doped La 2 Ti 2 O 7 solid solutions. The substitution sites of doping ions are discussed. X-ray diffraction (XRD) results indicate that the doped ions were incorporated into the lattice of La 2 Ti 2 O 7 successfully. Transmission electron microscopy (TEM) measurements prove that the doped ions with smaller radius induce the contraction of lattice. The results of UV and photoluminescence (PL) tests show that the doped ions cause the red-shift of band gap energies and enhance the concentrations of oxygen vacancies and defects. The electrochemical hydrogen storage properties of the samples were measured at 303 and 333 K, respectively. The discharge capacities of the doped samples keep growing by increasing the cycle number at 333 K. Meanwhile, the doped samples possess better kinetic performances than the pure La 2 Ti 2 O 7 . Among the samples, the Mn, Co and Li ions doped samples exhibit better electrochemical hydrogen storage properties. The hydrogen storage properties are closely related with the characteristics of doped ions, crystallite sizes, the content of the oxygen vacancies and defects in the lattice of La 2 Ti 2 O 7 .
研究领域:
材料科学
·
电化学
✓ 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）