JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2022
·Vol. 33
·期 14
·11174-11183
·
IF 2.779
Cui Zheng,Deng Guowei,Xu Pan,Liu Xiaoyang,Yang Min,Wang Qiliang
In this work, doped and co-doped LaNbO 4 :RE 3+ (RE = Eu, Eu/Tb, Tb) single crystals were prepared by a unique hydrothermal method under the condition of supercritical water and a wide temperature range (823–923 K). The crystal structure of LaNbO 4 :Eu 3+ /Tb 3+ were refined by virtue of the Rietveld method, which can determine the occupation position of dopants. The luminescence properties of Eu 3+ /Tb 3+ -doped LaNbO 4 phosphors were carefully measured and analyzed by diffuse reflectance spectra and ultraviolet. The energy transfer was recognized between host and doped Eu 3+ /Tb 3+ ions based on the luminescence spectra and decay lifetimes, which is dominated by electric multipolar interaction. The results show that the strong emission peaks at 491 nm ( 5 D 4 – 7 F 6 ), 550 nm ( 5 D 4 – 7 F 5 ), 590 nm ( 5 D 4 – 7 F 4 ), 623 nm ( 5 D 4 – 7 F 3 ) can be observed at the optimum reaction temperature of 650 °C, corresponding to CIE coordinates (0.3398, 0.3288). By adjusting the concentration of Eu 3+ /Tb 3+ ions, the emission colors of LaNbO 4 :Eu 3+ /Tb 3+ are varied from blue to pink and to white. Consequently, the synthesis strategy reported herein not only holds extensive promise for expanding the preparation techniques of materials with good luminescence properties but also promotes the practical applications of LaNbO 4 single crystal in low color temperature and high index white light-emitting diode (WLED).
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
·
2023
·
IF 3.9
Meiting Li,Bo Chen,Chi Zhang,Xuejiao Wang,Fufa Wu,Rongda Zhao
Tartrate (Tar 2− ) was originally employed as a chelating/structure-directing agent for hydrothermal synthesis of CdWO 4 :Yb 3+ ,RE 3+ (RE = Ho and Er) micro/nanocrystallites, followed by calcination at 700 °C for 2 h. It was clearly demonstrated that Tar 2− restricted the exposed ab planes and 3D self-assembly of microplates, resulting in ∼50 nm sized nanoparticles . Up-/down-conversion (UC/DC) photoluminescence were revealed to be strongly size dependent. Under 978 nm pump laser excitation, flower-like assembly was found to exhibit the stronger UC emissions of Ho 3+ and Er 3+ , among which two CdWO 4 :Yb 3+ ,Ho 3+ phosphors generated orange-yellow fluorescence via three-photon processes, while CdWO 4 :Yb 3+ ,Er 3+ microflowers and nanoparticles showed yellowish-green and pale green colors, respectively. Moreover, nanoparticles intensified the dominant green DC emissions of Ho 3+ and Er 3+ by ∼3 and 2 times, implying the pivotal roles of morphology engineering in tunable photoluminescence . This research may provide insights into crystallite/architecture engineering and luminescence optimization for near-infrared response solar cells and 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
Nanoscale
·
2012
·Vol. 4
·期 18
·5619-5626
·
IF 5.914
Suwen Li,Xiao Zhang,Zhiyao Hou,Ziyong Cheng,Pingan Ma,Jun Lin
Uniform, ultra-small-sized and well-water-dispersible LaF3 nanoparticles doped with trivalent rare earth (RE) ions (Eu3+ or Tb3+) have been synthesized by a simple, low temperature synthesis route. The nanoparticles, with sizes of about 3.2 nm (for those doped with Eu3+) and 3.0 nm (for those doped with Tb3+), are roughly spherical and monodisperse. 1,2,4,5-Benzenetetracarboxylic acid (labeled as BA) as sensitizer has been bonded to the surface of the nanoparticles, which can sensitize the emission of RE3+ in the LaF3 nanoparticles. The BA–LaF3:RE3+ (RE = Eu or Tb) nanoparticles have a broad absorption band in the UV domain, and show enhanced luminescence of RE3+ based on an energy transfer from BA ligands to RE3+ ions (i.e. the so-called “antenna effect”). Due to the dual protection of organic ligands (BA) and inorganic matrices (LaF3), BA–LaF3:RE3+ (RE = Eu or Tb) nanoparticles have longer excited state lifetimes than LaF3:RE3+ (RE = Eu or Tb) nanoparticles as well as lanthanide coordination polymers of BA.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
DALTON TRANSACTIONS
·
2022
·Vol. 51
·期 34
·13106-13118
·
IF 4.569
Hang Liu,Haiyan Wang,Xingke Zheng,Pengcheng Wang,Yuhong Zhang
In this work, Yb3+/RE3+ (RE = Er/Ho) co-doped Zn3Mo2O9 phosphors were synthesized by high-temperature solid-state reactions. Under 980 nm excitation, the upconversion (UC) luminescence thermal enhancement was obtained for Zn3Mo2O9:Yb3+/RE3+ phosphors. The green emission intensity of the Zn3Mo2O9:Yb3+/Er3+ sample was increased 5 times from 373 to 573 K. The red emission intensity of the Zn3Mo2O9:Yb3+/Ho3+ sample was enhanced 7.92 times. The anomalous thermal enhancement of UC emission was induced by the negative thermal expansion (NTE) of the Zn3Mo2O9 host. The energy transfer rate from the sensitizer (Yb3+) to the activator (RE3+) was enhanced because of the lattice contraction and distortion for NTE materials. Compared with the UC emission of Er3+single doped Zn3Mo2O9 sample, the luminescence thermal enhancement was absent, which contributed to proving the physical mechanism. The temperature sensing properties of the Zn3Mo2O9:Yb3+/Er3+ and Zn3Mo2O9:Yb3+/Ho3+ samples were also investigated based on the fluorescence intensity ratio (FIR) technology. The absolute sensitivity (SA) and relative sensitivity (SR) of Zn3Mo2O9:Yb3+/Er3+ phosphor reached 0.0060 K−1 and 0.72% K−1, which is based on the thermal coupling levels (2H11/2, 4S3/2) FIR of Er3+ ions. In addition, the SA and SR of Zn3Mo2O9:Yb3+/Ho3+ phosphor reached 0.0119 K−1 and 0.86% K−1, that is based on the non-thermal coupling levels (5S2/5F4, 5F5) FIR of Ho3+ ions. The research results indicate that the Zn3Mo2O9 host shows NET. The Yb3+/RE3+ co-doped Zn3Mo2O9 phosphors are good materials for highly sensitive optical temperature measurement, which can be used to develop thermally enhanced ratiometric optical thermometers.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
RSC Advances
·
2021
·Vol. 11
·期 58
·36689-36697
·
IF 3.361
Hang Liu,Xiukai Jian,Mingtai Liu,Kailin Wang,Guangyao Bai,Yuhong Zhang
SrWO4 phosphors doped with Ho3+(Er3+)/Yb3+ are successfully prepared by a high temperature solid-state reaction method. The upconversion (UC) luminescence properties of all the samples have been investigated under 980 nm excitation. Strong green emissions are obtained in the SrWO4:Yb3+/Ho3+ and SrWO4:Yb3+/Er3+ samples with the naked eyes. In a temperature range going from 303 K to 573 K, the UC emission spectra of the phosphors have been measured. Then the temperature sensing properties also have been discussed via fluorescence intensity ratio (FIR) technology. For the SrWO4:Yb3+/Ho3+ phosphor, the FIR technologies based on thermal coupling levels (TCLs)(5F4,5F5) and non-thermal coupling levels (non-TCLs)(5S2, 5F4/5F5) are used for investigating the sensitivity. The results show that the maximum absolute sensitivity reaches 0.0158 K−1 with non-TCLs. As for Yb3+/Er3+ codoped SrWO4 phosphor, the maximum absolute sensitivity reaches 0.013 K−1 with TCLs (2H11/2,4S5/2) at a temperature of 513 K. These significant results demonstrate that the SrWO4:Ho3+(Er3+)/Yb3+ phosphors are robust for optical temperature sensors.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Inorganic Chemistry Frontiers
·
2023
·Vol. 10
·期 10
·3131-3138
·
IF 7
Lin Liu,Jixuan Xu,Yiang Li,Shanshan Peng,Peng Lin,Hongyun Zhong,Liang Song,Junpeng Shi,Xia Sun,Yun Zhang
Recently, persistent luminescence materials (PLMs) have attracted extensive attention in the anti-counterfeiting and information encryption fields. Unfortunately, single visible persistent luminescence (PersL) demonstrates limited information security because the changes in information coded by visible PersL can be observed by the human eyes. In this work, we develop a dual-mode PLM with ultraviolet (UV) and visible PersL, Mg3Lu2Ge3O12:Bi3+,Re3+ (Re3+ = Pr3+ and Tb3+) (MLGO:Bi3+,Re3+). The emitter Bi3+ yields invisible UV PersL, and the emitter Re3+ exhibits visible PersL. The color of visible PersL can be changed upon variation of the Re3+ content. Because the UV PersL hidden behind visible PersL is invisible to the human eyes, the capacity of invisible information encryption can be realized. With a specific filter and a charge coupled device camera for detection, the encrypted optical information will appear. Based on the dual-mode PLM with UV and visible PersL, we design the four-mode information encryption method and display excellent information encryption capability.
研究领域:
材料科学
·
光学
·
安全与加密
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2026
·
IF 6
Shanlin Zhu,Jintao Xu,Weijun Zhao,Canyuan Liao,Xinyi Huang,Hongwei Hu,Ting Shi,Jiuping Zhong
Rare-earth-doped upconversion materials play a crucial role in the development of temperature sensing based on fluorescence intensity ratio (FIR). In this work, the upconversion (UC) luminescence of GdAlO 3 (GAP):Yb 3+ ,RE 3+ (RE = Ho, Er, Tm) phosphors was investigated. Under 980 nm laser excitation, GAP:Yb 3+ ,Ho 3+ emitted green ( 5 F 4 , 5 S 2 → 5 I 8 ) and red ( 5 F 5 → 5 I 8 , 5 F 4 → 5 I 7 ) light, GAP:Yb 3+ ,Er 3+ emitted green ( 2 H 11/2 , 4 S 3/2 → 4 I 15/2 ) and red ( 4 F 9/2 → 4 I 15/2 ) light, GAP:Yb 3+ ,Tm 3+ emitted blue ( 1 G 4 → 3 H 6 ) and red ( 1 G 4 → 3 F 4 , 3 F 3 → 3 H 6 ) light. Within the temperature range of 260–500 K, GAP:Yb 3+ ,Ho 3+ exhibits a maximum absolute sensitivity ( S a ) of 0.0078 K −1 at 460 K and a maximum relative sensitivity ( S r ) of 1.391% K −1 at 300 K, corresponding to the non-thermally coupled levels (NTCLs) 5 S 2 / 5 F 5 . Meanwhile, GAP: Yb 3+ ,Er 3+ shows a maximum S a of 0.00367 K −1 at 500 K and a maximum S r of 1.562% K −1 at 260 K, associated with the thermally coupled levels (TCLs) 2 H 11/2 / 4 S 3/2 . Remarkably, the maximum S a and S r of GAP:Yb 3+ ,Tm 3+ reached 0.03576 K −1 at 500 K and 6.740% K −1 at 260 K for NTCLs 1 G 4 / 3 F 3 . These results demonstrate significant potential for applications in high-sensitivity thermal sensing and non-contact optical thermometry.
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2022
·Vol. 12
·期 18
·11534-11542
·
IF 4.036
Bohan Wang,Zhihao Wang,Peng Mao,Yu Wang
Conventional luminescent materials generally exhibit uni-color and transient emission under UV excitation, which makes them mediocre in the field of anti-counterfeiting. The high-level anti-counterfeiting techniques are always becoming more complicated and in need of multi-color and persistent luminescent materials. Herein, we report a series of β-NaYF4:RE3+ (RE = Sm, Tb, Dy, Pr) persistent luminescent phosphors with multi-color emitting and ultra-long persistent luminescence under the irradiation of X-rays. The effects of doping concentrations of RE3+ on the size, morphology, radioluminescence and afterglow performance of the products are investigated in detail. Hexagonal structured rod-like β-NaYF4:Tb3+ crystals show super strong X-ray response and the afterglow signal lasts for up to seven days after X-rays are turned off. Upon X-rays irradiation, some of the F− ions are expected to escape from the crystal lattice by elastic collisions, leading to the generation of Frenkel defects: the F vacancies and interstitials , which capture electrons and release them slowly to achieve different afterglow emission times. Taking advantages of the extraordinary radioluminescence performance of the β-NaYF4:RE3+ persistent luminescent phosphors, the dynamic anti-counterfeiting patterns that containing rich time-resolved information were successfully designed.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
DALTON TRANSACTIONS
·
2023
·Vol. 53
·期 6
·2575-2590
·
IF 4
Yuhong Zhang,Wentong Cai,Jian Liu,Ziyi Zhang,Bo Sun,Hang Liu
Herein, a series of Y2W3O12:10%Yb3+/x%RE3+ (RE = Er/Ho/Tm) phosphors is prepared via a solid-state reaction. The upconversion and downshift luminescence properties of the phosphors were investigated under an excitation of 980 nm. The bright blue light emission from Tm3+ ion and the green and red light emissions from Ho3+(Er3+) ions were observed. The near-infrared light intensity of NIR-I (Tm3+, ∼850 nm), NIR-II (Er3+: ∼1550 nm; Tm3+: ∼1783 nm) and NIR-III (Ho3+: ∼2050 nm) were analyzed. In particular, the dramatic thermal enhancement phenomenon in visible and NIR regions was exhibited by the Y2W3O12:10%Yb3+/x%RE3+ (RE = Er/Ho/Tm) phosphors. Among them, the green light intensity of Er3+ ions increased 26.77 times, from 303 to 573 K. The NIR-II emission band (∼1783 nm) intensity of Tm3+ ions at 533 K increased 168.7 times compared to that at 313 K. The possible thermal enhancement mechanism is illustrated by the negative thermal expansion (NTE) and Frenkel defect of the Y2W3O12 host. Finally, the optical temperature sensing performances of Y2W3O12:10%Yb3+/x%RE3+ (RE = Er/Ho/Tm) samples are investigated according to the luminescence intensity dependence relationship on temperature. The maximum value of SR reached 4.24% K−1 at 353 K for Y2W3O12:10%Yb3+/0.6%Ho3+ phosphor. The results indicate that the Y2W3O12:10%Yb3+/x%RE3+ (RE = Er/Ho/Tm) phosphors possess anti-thermal quenching properties and are suitable for developing optical temperature sensors.
研究领域:
材料科学
·
光学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Chaochao Tao,Songsong Ding,Shengqian Wang,Lin Liu,Houfa Mao,Genyuan Chen,Hualan Xu,Chongfeng Guo,Shengliang Zhong
Multicolor emission has long been a critical scientific challenge in the field of persistent luminescence (PersL) materials, with the achievement of multicolor PersL emission within a single host matrix representing a primary research objective. Herein, a new and effective method of using coordination polymers (CPs) as precursors is designed to synthesize multicolored CdSiO 3 :RE 3+ (RE = Pr, Sm, Eu, Tb, Tm) PersL materials. Through variation of rare earth dopants, we successfully achieved color-tunable PersL emission spanning brown, pink, purple, red, green, and blue spectra. The influence of RE 3+ dopants on the crystal structure, morphology and optical properties are studied in detail. Notably, this straightforward synthesis strategy enabled the effective production of nanospherical particles exhibiting regular morphology and uniform size distribution. The electronic band structure of the material was theoretically analyzed using density functional theory (DFT) calculations. Combined with thermoluminescence (TL) measurements were performed to elucidate the underlying PersL mechanism. To demonstrate practical applications, we designed a dynamic anti-counterfeiting pattern and evaluated the potential utility of CdSiO 3 :RE 3+ materials. This study not only enhances our fundamental understanding of CdSiO 3 -based PersL materials, but also provides novel insights into morphology and size control strategies that could be extended to other PersL material systems.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
Advanced Optical Materials
·
2024
·
IF 8
Shanshan Zhao,Dechao Yu,Benchun Li,Saima Kanwal,Tiantian Shen,Jincheng Wu,Songlin Zhuang,Dawei Zhang
The development of blue/green/red tricolor upconversion (UC) phosphors under invisible light irradiation has attracted significant interest in emerging applications such as anti-counterfeiting, three-dimensional (3D) optical data storage, and solid-state 3D displays. In this study, a series of LiYO 2 :RE 3+ ,Yb 3+ (RE = Tm, Ho, Eu) phosphors are successfully prepared via first precipitation process followed by calcination, and completely optimized for efficient tricolor UC luminescence with 980 nm laser excitation. Mechanisms involving two- or three-photon absorption processes and low-phonon-energy-suppressed multi-phonon relaxation have been proposed for Ho 3+ (Eu 3+ )/Yb 3+ and Tm 3+ /Yb 3+ codoping, respectively. In addition, the RE 3+ (Yb 3+ ) concentration-induced phase transition of the LiYO 2 host is discussed for interesting possibilities in spectral regulation. Based on the broad color gamut achieved by the tricolor UC phosphor mixture, homochromatic and polychromatic metamerisms are experimentally fabricated via screen printing for high-level anti-counterfeiting and information security. Moreover, for a proof-of-concept demonstration, prototypes of 3D optical data storage and volumetric displays are constructed by embedding tricolor UC mixtures and their 3D printed patterns in polydimethylsiloxane. It is believed that the continuous exploration of tricolor UC under invisible light excitation for metamerism anti-counterfeiting and 3D displays can promote the development of high-level information security and advanced volumetric display technologies.
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
ADVANCED MATERIALS
·
2023
·Vol. 35
·期 49
·2306003
·
IF 29.4
Jiaxin Yang,Ming Feng,Jingru Wang,Zejia Zhao,Rui Xu,Ziyu Chen,Kang Zhang,Adnan Khan,Yingdong Han,Feng Song,Wei Huang
High-capacity optical data storage and information encryption by using glass substrates are fascinating due to merits of expanding the functionality and applicability of the optoelectronic field. However, the development of glass substrate-based multi-dimensional information encryption methods has remained a challenge because of the high hardness, brittleness and melting temperature of glasses. Herein, inspired by the unique natural structure of plant leaves, multicolor micro-texture-based physical unclonable functions (PUFs) fluorescence glass labels (MTPLs) are exploited by using ultraviolet photocurable silica nanocomposites and soft replication method. It is the first time that simultaneous rare-earth ion (RE 3+ ) space-selective doping and bionic micro-texture replication onto transparent glass have been realized, in which the doping position and fluorescence color of RE 3+ and height information of unclonable micro-texture can be selectively equipped for multilevel information encryption. The prepared micro-scale MTPLs are endowed with tunable multilevel authentication models, including macro-scale multicolor fluorescent 2D patterns, micro-scale pattern, color 3D information and intelligence authentication. A high-performance anti-counterfeiting platform with interactive authentication is also established based on the high robustness and security of MTPLs. Such unclonable bionic MTPLs based on RE 3+ space-selective doping and micro-texture duplication provide an effective and potentially universal approach for multilevel encryption and intelligent authentication.
研究领域:
材料科学
·
光学工程
·
信息安全
✓ 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）