JOURNAL OF LUMINESCENCE
·
2022
·
IF 4.171
Wang Luo,Xintong Zhang,Kaofeng Huang,Bohan Wang,Yu Wang,Zhilie Tang,Kezhi Zheng
Long afterglow materials feature long-lasting luminescence after the cessation of the excitation source. The rising demand for afterglow materials in many applications such as deep tissue imaging, ultrasensitive sensing, and radiation detection has led to extensive research on X-ray-activated afterglow systems. However, the progress in this field is constrained by the limitation and shortage of radiation-induced afterglow materials. Herein, a newly X-ray-excited long afterglow phosphor CaZnOS:Tb 3+ has been developed by using lithium-assisted synthetic protocol. Afterglow properties of Tb 3+ -doped CaZnOS microcrystals are systematically investigated by considering the dopant concentration, reaction temperature, reaction time, reaction atmosphere, and gas flow . As the gas flow of argon atmosphere increases from 0.05 to 0.5 L/min, the CaZnOS:Tb 3+ microcrystals exhibit a distinct change in trap depth from 0.59 to 0.75 eV, corresponding to a gradual increase in afterglow time. Together with thermoluminescence analysis, the long afterglow mechanism is also discussed in this work. These results highlight the importance of reaction gas flow for the efficient regulation of traps and defects in afterglow materials. Furthermore, they provide a fundamental design principle and new route for the creation of lanthanide-doped CaZnOS afterglow phosphors.
研究领域:
材料科学
·
放射医学
✓ 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
Small
·
2022
·Vol. 18
·期 12
·2107437
·
IF 15.153
Yuantian Zheng,Xu Li,Ronghua Ma,Zefeng Huang,Chunfeng Wang,Mingju Zhu,Yangyang Du,Xian Chen,Caofeng Pan,Bohan Wang,Yu Wang,Dengfeng Peng
CaZnOS-based semiconductors are the only series of material system discovered that can simultaneously realize a large number of dopant elements to directly fulfill the highly efficient full-spectrum functionality from ultraviolet to near-infrared under the same force/pressure. Nevertheless, owing to the high agglomeration of the high temperature solid phase manufacturing process, which is unable to control the crystal morphology, the application progress is limited. Here, the authors report first that CaZnOS-based fine monodisperse semiconductor crystals with various doping ions are successfully synthesized by a molten salt shielded method in an air environment. This method does not require inert gas ventilation, and therefore can greatly reduce the synthesis cost and more importantly improve the fine control of the crystal morphology, along with the crystals’ dispersibility and stability. These doped semiconductors can not only realize different colors of mechanical-to-optical energy conversion, but also can achieve multicolor luminescence under low-dose X-ray irradiation, moreover their intensities are comparable to the commercial NaI:Tl. They can pave the way to the new fields of advanced optoelectronic applications, such as piezophotonic systems, mechanical energy conversion and harvesting devices, intelligent sensors, and artificial skin as well as X-ray applications.
研究领域:
材料科学
·
光电技术
·
半导体物理
✓ 已验证
DOI
高影响因子
ADVANCED MATERIALS
·
2025
·
IF 26.8
Shengbin Xu,Yao Xiao,Puxian Xiong,Pan Zheng,Sheng Wu,Xuesong Wang,Yumin Yin,Haiqiang Fang,Chengan Wang,Yuexi Lu,Enhai Song,Jiulin Gan
Mechanoluminescence (ML), the emission of light under mechanical stimuli, shows great potential in passive sensing, wearable devices, and biomedical diagnostics. However, the practical application of ML materials is hindered by low intensity and poor self-recoverable performance. Herein, a Mn 4+ →Mn 2+ self-reduction strategy is presented to significantly enhance the self-recoverable ML performance of CaZnOS by inducing lattice defects and promoting distortion in its noncentrosymmetric hexagonal structure. This approach enhances the internal piezoelectric response and increases the maximum ML intensity up to 4 times. X-ray absorption near-edge structure, extended X-ray absorption fine structure, electron paramagnetic resonance, piezoresponse force microscopy, and density functional theory calculations reveal that the composite defects involving V O · · ${\mathrm{V}}_{\mathrm{O}}^{\cdot \cdot}$ and V Zn ′ ′ ${\mathrm{V}}_{{\mathrm{Zn}}}^{{\mathrm{^{\prime\prime}}}}$ are the key to the significant enhancement of ML. Furthermore, this strategy is successfully extended to rare-earth ions codoped systems, achieving a general enhancement of near-infrared ML emission. Based on these findings, a multilayer orthodontic sensor is developed, capable of real-time occlusal mapping and bite-force monitoring. The device exhibits sensitive response across 0–12 N and achieves 96.89% accuracy in occlusal localization through neuromorphic image recognition. This work offers a generalizable route toward ML performance optimization and paves the way for the development of advanced intelligent sensing technologies.
研究领域:
材料科学
·
力致发光
·
压电材料
·
缺陷化学
·
传感器与传感技术
·
智能材料
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Chemical Engineering Journal Advances
·
2025
·
IF 7.1
Zhihao Wang,Shuanglin Zhang,Xiping Zeng,Dengfeng Peng,Yu Wang,Jinbo Wu
Mechanoluminescence (ML) behavior has been extensively studied in recent years in fields such as sensing and lighting. The primary obstacle hindering the large-scale commercial application of ML materials is that they only exhibit significant luminescence when subjected to relatively strong stress stimuli. We in this work employed the aliovalent doping strategy in the ML matrix CaZnOS for the first time to modify the crystal and electronic structure of the material, thereby optimizing its ML property. The impact of Ca 2+ substitution by (K + , Gd 3+ ) ionic pair on phase purity, composition and morphology was systematically analyzed by the combined techniques of XRD, ICP, TEM, and XPS. The band structure of the representative samples was further investigated using UV-Vis measurements and density functional theory (DFT) calculations. After aliovalent doping, not only the concentration of oxygen vacancy increased but also the band gap narrowed. These two changes respectively enhanced the number of hole-electron pairs and facilitated their combination during the ML process, ultimately leading to an enhancement of the ML intensity.
研究领域:
材料科学
·
固体物理
·
光电子学
·
无机化学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
Advanced Optical Materials
·
2025
·Vol. 13
·期 14
·2403472
·
IF 7.2
Hongzhen Liu,Yuhe Shao,Chao Dou,Jing Zhao,Zhen Song,Quanlin Liu
Mechanoluminescence (ML) materials can convert mechanical energy into photoelectrons and have significant potential for applications in intelligent sensing, self-driven luminescent displays, and human-computer interaction. Among the numerous ML systems, Mn 2+ -doped wurtzite-based phosphors have become a prominent ML family. However, their ML emissions are typically confined to visible light, which substantially limits their utility in fields such as biomechanics and bioimaging. Here, it is demonstrated that the photoluminescence (PL) and ML emission of CaZnOS:Mn 2+ can be tuned from the red to near-infrared light (peaked at 770 nm) by regulating the Mn 2+ ion concentration. The electronic paramagnetic resonance, PL lifetime, and various spectra reveal that the near-infrared emission originates from the enhanced magnetic interaction of Mn 2+ pairs due to intrinsic defects. The heavy Mn 2+ -doped CaZnOS elastomer with near-infrared ML emission exhibits distinct advantages over low Mn 2+ -doped CaZnOS with only red emission in the field of biomechanical imaging. This work achieves near-infrared emission in CaZnOS phosphors singly doped with Mn 2+ ions for the first time, providing a perspective for spectra broadening of Mn 2+ ions-doped phosphors.
研究领域:
材料科学
·
光学
·
生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2022
·Vol. 32
·期 46
·2207881
·
IF 19.924
Jingna Jia,Xuwen Gao,Guizheng Zou
The self-activated mechanoluminescence (ML) of oxysulfides MZnOS (M = Ca, Sr, Ba) is very weak, and bright ML from these hosts is usually achieved with activator-doping strategy. Herein, a promising alkaline-earth-metal-ion blending strategy, instead of activator doping, is proposed to achieve intense and self-activated ML from MZnOS. Upon partially substituting the Ca 2+ of CaZnOS with Ba 2+ and vice versa, intense and eye-visible ML is achieved via exerting a small mechanical stimulus of 2 N onto the obtained Ca 1-x Ba x ZnOS (0 < x < 1). The luminescence center for ML of Ca 1-x Ba x ZnOS is intrinsic oxygen vacancy, so that Ca 1-x Ba x ZnOS can give off efficient and self-activated ML. Under optimum conditions, the maximum ML emission of Ca 0.84 Ba 0.16 ZnOS is about 50-folds and 170-folds to that of CaZnOS and BaZnOS, respectively. Promisingly, Bi 3+ can be incorporated into the lattice of Ca 1-x Ba x ZnOS, transferring ML center from the oxygen defects of Ca 1-x Ba x ZnOS to the activator of Ca 0.96-x Ba x ZnOS:Bi 0.04 , and eventually enable further enhanced ML by about twofolds. This alkaline-earth-metal-ion blending strategy can also enhance Bi 3+ -activated ML from M 0.96 ZnOS:Bi 0.04 , the maximum emission for ML of Ca 0.80 Ba 0.16 ZnOS:Bi 0.04 is 36-folds and 38 folds to that of Ca 0.96 ZnOS:Bi 0.04 and Ba 0.96 ZnOS:Bi 0.04 , respectively. This work opens an avenue to develop new ML hosts and luminophores with efficient emission.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Liandong Guo,Ting Li,Chunchun Zhu,Wenchao Liang,Lina Wu
A series of Bi 3+ or Eu 3+ ion single doped and Bi 3+ and Eu 3+ co-doped CaZnOS phosphors were synthesized via high temperature solid state method. Under ultraviolet (UV) excitation, CaZnOS: Bi 3+ has an intense emission band ranged from 400 to 600 nm owing to the 3 P 1,0 → 1 S 0 transition of Bi 3+ . And CaZnOS: Eu 3+ shows superior red emissions due to the characteristic 5 D 0 → 7 F J ( J = 1, 2, 3, 4) transitions of Eu 3+ . Tunable emission chromaticity from cyan, white, yellow to red is obtained by regulating the proportion of Eu 3+ in CaZnOS Bi 3+ , Eu 3+ . The energy transfer mechanism from Bi 3+ to Eu 3+ was confirmed to be a quadrupole-quadrupole interaction based on the overlap of emission band of Bi 3+ and excitation band of Eu 3+ combined with the luminescent lifetime measurement. In addition, CaZnOS: 2.5 mol% Bi 3+ , 3 mol% Eu 3+ phosphor with optimized concentrations has standard white light chromaticity coordinates (0.315, 0.323) and activation energy about 0.372 eV, which reflects its potential application in ultraviolet-chip excited white light emitting diodes (W-LEDs).
✓ 已验证
DOI
高影响因子
Advanced Optical Materials
·
2023
·Vol. 11
·期 20
·2300623
·
IF 9
Zhihao Wang,Bohan Wang,Xiping Zeng,Dengfeng Peng,Yu Wang
Current luminescence materials are abundantly available for visualization fields on a theoretical level, while the lack of luminescent intensity has largely hindered their practical application. Here, the substantial enhancement of the multimode luminescence is demonstrated including mechanoluminescence (ML), photoluminescence (PL), and X-ray excited optical luminescence (XEOL) for Mn 2+ and Tb 3+ in zinc calcium oxysulfide (CaZnOS) by increasing the concentration of oxygen vacancies (OVs). Through a comprehensive structure analysis, it is found that the CaZnOS lattice has a tolerance of 60% of Sr 2+ with respect to Ca 2+ in the methodology. The experimental characterizations verified that the lattice distortion of CaZnOS originating from Sr 2+ incorporation can efficiently promote the elimination of oxygen elements and simultaneously produce more OVs in the matrix, which can effectively fortify the trapped electrons and ultimately promote stronger luminescence. The ML, PL, and XEOL achieve around two to six times’ enhancement after Sr 2+ incorporation. The findings provide insight into mechanisms underlying the luminescence behavior change of phosphors after cation substitution and may have wide implications for the practical application of intrinsically defective phosphors.
研究领域:
材料科学
·
发光材料
✓ 已验证
产品关联
DOI
高影响因子
OPTICS COMMUNICATIONS
·
2016
·
IF 1.48
Wei Wang,Dengfeng Peng,Hanlu Zhang,Xiaohong Yang,Caofeng Pan
Piezoelectric semiconductor with optical, electrical and mechanical multifunctions has great potential applications in future optoelectronic devices . The rich properties and applications mainly encompass the intrinsic structures and their coupling effects. Here, we report that lanthanide ions doped piezoelectric semiconductor CaZnOS:Sm 3+ showing strong red emission induced by dynamic mechanical stress. Under moderate mechanical load, the doped piezoelectric semiconductor exhibits strong visible red emission to the naked eyes even under the day light. A flexible dynamic pressure sensor device is fabricated based on the prepared CaZnOS:Sm 3+ powders. The mechanical-induced emission properties of the device are investigated by the optical fiber spectrometer. The linear characteristic emissions are attributed to the 4 G 5/2 → 6 H 5/2 (566 nm), 4 G 5/2 → 6 H 7/2 (580–632 nm), 4 G 5/2 → 6 H 9/2 (653–673 nm) and 4 G 5/2 → 6 H 11/2 (712–735 nm) f–f transitions of Sm 3+ ions. The integral emission intensity is proportional to the value of applied pressure. By using the linear relationship between integrated emission intensity and the dynamic pressure, the real-time pressure distribution is visualized and recorded. Our results highlight that the incorporation of lanthanide luminescent ions into piezoelectric semiconductors as smart materials could be applied into the flexible mechanical-optical sensor device without additional auxiliary power, which has great potential for promising applications such as mapping of personalized handwriting, smart display, and human machine interface .
研究领域:
材料科学
·
光电子学
·
传感器与执行器
·
压电材料
·
发光材料
·
柔性电子学
✓ 已验证
DOI
高影响因子
Journal of Physical Chemistry C
·
2015
·
IF 4.772
Hanlu Zhang,Dengfeng Peng,Wei Wang,Lin Dong,Caofeng Pan
In this study, we report an Er-doped quaternary piezoelectric semiconductor CaZnOS:Er3+ which shows both mechanoluminescence and upconversion luminescence properties. Under mechanical stimulation, green light emission can be observed by the naked eye from a flexible film fabricated by encapsulating CaZnOS:Er3+ particles between two polyethylene glycol terephthalate substrates. The integral emission intensity is proportional to applied pressure, making CaZnOS:Er3+ suitable for dynamic pressure sensing applications. Moreover, the doped sample also shows bright visible emission with near-infrared (980 nm) excitation. The fluorescence intensity ratio between two upconversion emission bands corresponding to 2H11/2, 4S3/2 → 4I15/2 transitions of Er3+ is sensitive to the variation of temperature. As a multifunctional optical material, CaZnOS:Er3+ could be used to not only visualize two-dimensional pressure distribution, through mechanically induced emission, but also sense temperature via the upconversion (UC) luminescence. This work provides a novel kind of multifunctional luminescent material for the development of integrated and coupling devices.
研究领域:
材料科学
·
光学工程
·
传感器技术
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）