MOLECULES
·
2023
·Vol. 28
·期 22
·7623
·
IF 4.6
Yangbo Wang,Yingdong Han,Runfa Liu,Cunping Duan,Huaiyong Li
Efficient control over lanthanide luminescence by regulating excitations offers a real-time and reversible luminescence-managing strategy, which is of great importance and highly desirable for various applications, including multicolor display and information encryption. Herein, we studied the crystal structure, luminescence properties, and mechanisms of undoped and Tb3+/Eu3+-doped CaZrO3in detail. The intrinsic purple-blue luminescence from host CaZrO3and the introduced green/red luminescence from guest dopants Tb3+/Eu3+were found to have different excitation mechanisms and, therefore, different excitation wavelength ranges. This enables the regulation of luminescent color through controlling the excitation wavelengths of Tb3+/Eu3+-doped CaZrO3. Furthermore, preliminary applications for information encryption with these materials were demonstrated using portable UV lamps of 254 and 302 nm. This study not only promotes the development of multicolor luminescence regulation in fixed-composition materials, but also advances the practical applications of lanthanide luminescent materials in visually readable, high-level anti-counterfeiting and information encryption.Keywords:luminescence;lanthanide;multicolor emission;luminescence regulation;information encryption
研究领域:
材料科学
·
光学
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2016
·Vol. 52
·期 5
·2673-2683
·
IF 2.302
Huang Zhangyu,Yi Mengji,Gao Huiping,Zhang Zhenlong,Mao Yanli
A strategy is demonstrated for simultaneous size and color tuning of KZnF 3 :Yb 3+ /Er 3+ nanocrystals through transition metal Mn 2+ doping. The experimental results indicate that the introduction of Mn 2+ into the KZnF 3 :Yb 3+ /Er 3+ reaction system facilitates the decrease of the crystal size. Moreover, in the case of a high concentration of Mn 2+ doping, the downshifting (DS) and upconversion (UC) luminescence all show a single red band emission. In this work, we mainly investigate the DS and UC energy transfer process among Mn 2+ /Yb 3+ /Er 3+ in KZnF 3 nanocrystals by the detection and analysis of the absorption, excitation, emission, and transient fluorescence spectra. The results show that both Mn 2+ and Yb 3+ ions can decrease the green emission while improving the red luminescence of Er 3+ . This DS and UC single red color tuning is significant for the application of nanoparticles in light conversion, biological labeling, or plant photosynthesis.
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
Advanced Materials Interfaces
·
2022
·Vol. 9
·期 11
·2102251
·
IF 6.389
Xupeng Gao,Qiang Hu,Xin Li,Po Lu,Yuan Zhong,Xinyu Shen,William W. Yu,Min Lu,Zhennan Wu,Siyao Yu,Xue Bai,Yu Zhang
The dimension is a leading parameter in customization of unique optoelectronic properties of halide perovskite, while it is still challenging to achieve dimension control beyond the well-developed composition regulation-based strategy considering their intrinsic feature of ionic crystal. In this paper, ligands-directed confinement effect is emphasized in rendering the reduced-dimensional engineering of halide perovskite, and quasi-2D (OAm) 2 CsPb 2 Br 7 ( n = 2) nanosheets are obtained by introducing a large amount of metal ions. As a representation, with Mg 2+ participation, the initial adsorption of organic ligands (i.e., OA and OAm) to inorganic components (i.e., [PbBr 6 ] 4− ) is promoted, conferring a ligands-directed surface reconstruction to form the lamellar structure composed of alternate organic and inorganic layers. Namely, the inorganic–organic lamellar ensemble will play as a soft template, which effectively restricts the growth of [PbBr 6 ] 4− in the c -axis direction even after the Cs-OA injection, thus producing the anisotropic layered perovskite of (OAm) 2 CsPb 2 Br 7 from CsPbBr 3 scenario. Notably, such reduced-dimensional engineering enables a remarkable luminescence tailoring, of which the deep blue emission centered at 439 nm is achieved. In addition, benefiting from such universal strategy, the luminescence is also dependent on the species of introduced metal ions (e.g., Ca 2+ , Co 2+ , Sr 2+ , and Mn 2+ ).
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
CRYSTENGCOMM
·
2019
·Vol. 22
·期 2
·311-319
·
IF 3.382
Wei Wang,Hang Yang,Yixin Liu,Xiaohan Yun,Yi Wei,Guogang Li
Establishing effective methods to optimize luminescent materials has been a significant challenge for white light-emitting-diode (WLED) applications. Herein, we successfully realized the adjustment of the photoluminescence and enhancement of the thermal stability of Ln3+ (Ln3+ = Ce3+, Eu3+)-doped Ca10−x/yBax/y(PO4)6O phosphors. First, Ba2+ ions from raw BaCO3 material realized a spectral red shift from 464 nm to 506 nm, which we suggested to be due to a synergistic effect from a centroid shift and crystal field splitting. When using BaHPO4 as a raw material, the PL intensity was 6.5 times that of the initial intensity. Surprisingly, the thermal stability was also improved, which was attributed to the increasing lattice distortion introducing many traps. Second, the Ca10(PO4)6O:Eu3+ red phosphor exhibited an abnormal emission phenomenon involving the 5D0 → 7F0 peak at 575 nm becoming the strongest emission peak and the 5D0 → 7F1 peak at 585 nm becoming particularly weak. The site symmetry and charge transfer states were speculated to be closely related to this phenomenon. The charge transfer states were not only correlated with the crystal field strength, but also related to f-electron delocalization, which significantly influenced the energy-level structure of Eu3+. More importantly, according to the relationship between the I(5D0 → 7F0)/I(5D0 → 7F1) ratio and the lattice structure, Eu3+ in the Ca10(PO4)6O compound could be applied as a probe to explore the matrix information, which would provide a helpful method to investigate the lattice structures of compounds and also guide researchers to design new suitable red phosphors.
研究领域:
材料科学
·
光学材料
·
无机化学
·
固体物理
·
发光学
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Rongbo Ma,Xinyong Gong,Chaoyong Deng,Weichao Huang
Multifunctional luminescence material with photochromism and controllable luminescence modulation properties have attracted increasing interest, enabling innovative applications such as optical information storage and anti-counterfeiting. Herein, the Bi 3 + single-doped BaSrY 4 O 8 photochromic phosphor was prepared by the solid-state reaction method, and its crystal structure and optical properties were systematically investigated. Notably, this phosphor demonstrates reversible photochromic properties, accompanied by a rapid transition in body color from white to brown when exposed to 365 nm near-UV light, and considerable recovery capacity upon blue light (450 nm) irradiation. By the combination of photoluminescence and reversible photochromism, the application of optical memory and anti-counterfeiting is developed that depends on the different light stimulations. Moreover, the BaSrY 4 O 8 : Bi 3+ phosphor exhibits an intense blue broadband emission centered at 423 nm and good thermal stability (83 %@423 K). These results indicate that BaSrY 4 O 8 : Bi 3+ phosphor is a promising multifunctional luminescence material for applications in optical storage and anti-counterfeiting.
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产品关联
DOI
高影响因子
OPTICAL MATERIALS
·
2023
·
IF 3.9
Fan Chen,Xiao-Jun Wang,Xuehu Zhang,Changhua Zhang
Compositional tune and doping/alloying routes have become the research focus for tailoring optical features of lead-free metal halide double perovskites to advance the development of solid-state lighting and display applications. Cs 2 NaInCl 6 double perovskite is receiving tremendous attention owing to its excellent optical properties . In this paper, we have successfully obtained the lead-free Cs 2 NaInCl 6-x Br x :Sb 3+ perovskites using the hydrothermal method . Via the substitution of bromine ions for chloride ions in Cs 2 NaInCl 6 :Sb 3+ , a tunable emission from 445 nm to 480 nm was realized. The X-ray diffraction, scanning electron microscope , UV–vis absorption spectra , PL spectra, TRPL spectra, air stability and thermal stability were investigated in detail. The sample shows an admirable air stability and excellent thermal stability. The results demonstrate that the cyan-emitting Cs 2 NaInCl 6-x Br x :Sb 3+ perovskites can be applied to white LEDs, especially for the full-spectrum LED illumination.
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
JOURNAL OF MATERIALS SCIENCE
·
2025
·
IF 3.9
Lu Chunxiao,Zhao Ye,Zhang Qiwei,Li Shuai,Li Pengyu,Guo Yu,Li Yong,Zhang Liwen,Hao Xihong
Transparent ferroelectric ceramics, emerging as innovative photoelectric multifunctional coupling material, demonstrate significant potential for applications in optical storage and smart windows. However, achieving high transparency via manipulation of the preparation process, microstructure, and phase structure poses a considerable challenge. Here, we employ multiple strategies, including the fabrication technology regulation and donor doping of La 3+ and Tb 3+ at the A-site of K 0.5 Na 0.5 NbO 3 to fabricate exceptional transparent ceramics coupled with multi-mode reversible modulations of transparency, photochromism, and photoluminescence. This research offers a novel perspective on the design of transparent multifunctional materials.
研究领域:
材料科学
·
功能陶瓷
·
光电耦合材料
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固态化学
·
智能窗口材料
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2022
·
IF 8.025
Yuxia Luo,Zhuo Chen,Ping He,Qingdi Liu,Zemin He,Yuzhen Zhao,Hao Ma,Liyi Li,Zhao Zhang,Xinping Li,Qing Han
A new design for chiral photonic cellulose nanocrystal films was developed by co-assembling lanthanide-doped nanorods (NRs) into chiral cellulose nanocrystals, in which the photonic band gap (PBG) could be tuned in the visible range by changing the mass fraction of flexible agents, such as polyvinyl alcohol (PVA) and ethylene glycol (EG). Due to the PBG effect, the luminescence modulation in such nanocrystal films had been realized. The down-conversion luminescence from NaGd 30 Y 60 F 4 :5%Tb 3+ , 5%Eu 3+ NRs and up-conversion luminescence from NaGd 40 Y 40 F 4 :18%Yb 3+ , 2%Er 3+ NRs could be enhanced by 28 % and 18 % respectively, on account of the band edge effect. The luminescence would be inhibited when the luminescence overlapped with the stop band of the PBG. These results implied that the biocompatible photonic cellulose nanocrystal films are ideally suited for applications in optical coding, optical resonators and biocompatible lasers.
研究领域:
材料科学
·
光学
·
生物医学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
OPTICAL MATERIALS
·
2025
·
IF 4.2
Tao Wei,Lei Xu,Duanduan He,Heyun Xu,Fei Long,Chaoyong Deng,Xucheng Li
A series of Eu 2+ -activated β-Ca 3 (PO 4 ) 2 -type Ca 9 MgNa(PO 4 ) 7 phosphors were successfully synthesized via high-temperature solid-state reaction. The substitution effects of Zn 2+ for Mg 2+ and Li + for Na + on the local coordination environments and luminescence characteristics of Eu 2+ were systematically investigated. The results demonstrate that Eu 2+ ions predominantly occupy the Ca1/Ca2, Ca3, and Na sites in Ca 9 MgNa(PO 4 ) 7 , corresponding to emission peaks at blue(1), blue(2), and green, respectively. Zn 2+ substitution for Mg 2+ induces lattice expansion, which reduces the occupancy probability of Eu 2+ at Ca1/Ca2 sites while lowering the formation energy of Ca3 sites, thereby significantly enhancing Ca3 and Na + site emissions but reducing Ca1/Ca2 site intensity. Subsequent Li + substitution for Na + causes contraction of the Li/NaO 6 polyhedra, reducing the capacity of the Na sites to accommodate Eu 2+ . Concurrently, the adjacent Ca(3)O 9 polyhedra undergo expansion, promoting preferential Eu 2+ occupancy at the Ca3 sites and consequently enhancing the emission intensity at blue(1).
研究领域:
材料化学
·
无机化学
·
发光材料
·
固体物理
·
光学材料
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF LUMINESCENCE
·
2025
·
IF 3.6
Cang Zhang,Ling He,Junhao Li,Kunpeng Shi,Peng Chang,Yujie Zheng,Yong Yang,Dacheng Zhou,Jianbei Qiu
Low-dimensional halide perovskites, as distinguished members of the perovskite family, have garnered significant attention due to their exceptional optical properties. However, strategies for dimensional phase-structure transition using low-dimensional precursors remain underexplored. Herein, a room-temperature two-step supersaturation recrystallization (SR) method was developed. The precursor perovskite Cs 3 Sb 2 Cl 9 was first synthesized, followed by the modulation of its luminescence properties. Subsequently, it was found that the addition of 1 mol CsCl and 1 mol MnCl 2 ·4H 2 O successfully yielded the two-dimensional (2D) metal halide perovskite Cs 4 MnSb 2 Cl 12 . Specifically, Mn 2+ ions were incorporated as luminescent centers, where equimolar CsCl and MnCl 2 ·4H 2 O (1 mmol each) induced a 2D phase-structure transition, enabling effective emission control. To address the weak orange-red emission of Cs 4 MnSb 2 Cl 12 , Cd 2+ was strategically doped to form Cs 4 Cd x Mn 1- x Sb 2 Cl 12 series. With increasing Cd 2+ content, non-monotonic luminescence enhancement was observed, reaching maximum intensity at x = 0.8. This is attributed to the Cd 2+ doping, which weakens the Mn–Mn coupling and breaks the symmetry of the [MnCl 6 ] 4− octahedra, thereby converting the parity-forbidden d–d transition of Mn 2+ into a partially spin-allowed transition and enhancing the Mn 2+ emission. Simultaneously, the improved crystallinity reduces the defect density, thus diminishing non-radiative decay via defect sites and ultimately leading to enhanced luminescence efficiency. This work enriches synthesis strategies for 2D metal halide layered perovskites and provides a novel approach for luminescence control of Sb-based systems.
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产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2023
·
IF 5.2
Yanan Li,Shujie Gai,Hui Zhu,Jian Yin,Wenyuan Guo,Maxim S. Molokeev,Xiangyang Lu,Mao Xia,Zhi Zhou
Herein, the strategy of replacing Ge 4+ with smaller Si 4+ was adopted to realize the site-selective occupation of Bi 3+ activator in the small ring and obtain a near-infrared light-emitting in Zn 2 (Ge,Si)O 4 . The designed phosphor exhibits a broad NIR emission with FWHM ≈104 nm in the 650−860 nm region, with a center emission wavelength of about 750 nm. Interestingly, the more sensitive four-member ring sites gradually replaced the six-member ring sites and realized a large-scope photoluminescence regulation from blue to NIR by just after the crystal field engineering. The possible reasons for this phenomenon can be interpreted by centroid shift ( ε c ) and crystal field splitting ( ε cfs ). This work not only provides new insights for the development of Bi 3+ -activated NIR-emitting phosphors, but also provides thoughts for revealing the potential NIR luminous mechanism of Bi 3+ .
研究领域:
材料科学
·
光电技术
·
光子学
✓ 已验证
DOI
高影响因子
Science China-Technological Sciences
·
2023
·Vol. 66
·期 9
·2735-2742
·
IF 4.6
Wang Yun,Zha YanFang,Yang YunYi,Liu CiHui,Di YunSong,Cao GuiYuan,Wei ShiBiao,Chen ZhiHui,Gan ZhiXing
Halide perovskites exhibit high performance in all sorts of optoelectronic and photonic areas, suggesting their huge potential in integrated photonic devices. However, until now, all optical logic gates based on perovskites are still rarely explored, hindering the development of all-optical networks and computing. Herein, a new concept of all-optical logic gates is proposed based on the modulation of photoluminescence (PL) from perovskite nanocrystals (PNCs). A hierarchical photonic crystal (Hie PhC) is developed by self-assembling polystyrene (PS) and SiO 2 nanoparticles, which exhibit a higher PL enhancement than that of a monolayer PhC. Moreover, the light-controlled PL is realized by taking advantage of the high thermal response of the PL from PNCs/Hie PhC on polyethylene (PE) substrate, assisted by a graphene layer for light-heat conversion. Consequently, optical diode and triode are achieved based on the modulated PL, which exhibit contrast ratios (CR) of 24.7 and 74.0 dB, respectively. All-optical logic gates, including “AND”, “OR” and “NOT”, are realized based on the optical diode and triode.
研究领域:
光子学
·
纳米光子学
·
材料科学
·
集成光学
·
光电子学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）