Inorganic Chemistry Frontiers
·
2023
·Vol. 10
·期 10
·3131-3138
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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
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光学
·
安全与加密
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产品关联
DOI
高影响因子
DALTON TRANSACTIONS
·
2021
·Vol. 50
·期 24
·8457-8466
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IF 4.39
Shao Yan,Yanjie Liang,Yafei Chen,Jingwei Liu,Dongxun Chen,Zhengwei Pan
Visible and infrared persistent phosphors have gained considerable attention in recent years and are being widely used as glow-in-the-dark materials in dark environments. In contrast, the progress in persistent phosphors emitting at the other end of the spectrum, i.e., the shorter-wavelength ultraviolet-C (UVC; 200–280 nm), is rather slow. Here we report the design and synthesis of a well-performing Pr3+-doped UVC emissive persistent phosphor, Lu2SiO5:Pr3+, which exhibits intense UVC persistent luminescence peaking at 270 nm and a long persistence time of more than 12 h after excitation with a 254 nm UV lamp. Besides, the UVC persistent luminescence of a UV pre-irradiated sample can be repeatedly revived after repeated short-illumination with low-energy white light via a process called photostimulated persistent luminescence. Owing to the distinct spectral features of UVC light and the self-sustained luminescence properties, the UVC persistent luminescence of the Lu2SiO5:Pr3+ persistent phosphor can be clearly monitored and imaged using a corona camera in bright environments including direct sunlight and indoor light. The Lu2SiO5:Pr3+ persistent phosphor is expected to find promising applications in the covert optical tagging field.
研究领域:
材料科学
·
光学工程
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产品关联
DOI
PubMed
高影响因子
Advanced Optical Materials
·
2021
·Vol. 10
·期 1
·2101669
·
IF 9.926
Zhihao Zhou,Shuai Zhang,Yakun Le,Hong Ming,Yang Li,Shi Ye,Mingying Peng,Jianrong Qiu,Guoping Dong
Spinel configuration is a kind of broadly considered host candidate when designing persistent luminescence (PersL) materials due to the easy generation of vacancies and anti-site defects. Here, a new strategy of defect enrichment for the activation of PersL is proposed, and in contrast to the spinel configuration, it is demonstrated that the crystal structure of near inverse spinel ensures more numerous defects to activate the near-infrared (NIR) PersL of Fe 3+ . Fe 3+ -doped MgGa 2 O 4 displays the PersL band in the range of 600 to 900 nm and possesses a super-long PersL duration time >15 h. The optical analysis and the calculation of density functional theory unravel that the near inverse spinel structure can lower the carrier transfer barriers to accelerate the formation of carrier trap states within the bandgap. Therefore, more numerous defects in this structure may participate in the trapping and de-trapping process by comparison with the normal spinel configuration. These findings are expected to accelerate the development of new PersL materials through Fe 3+ doping toward versatile biological applications in NIR window.
研究领域:
材料科学
·
光学物理
·
生物医学工程
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DOI
高影响因子
TALANTA
·
2020
·
IF 5.339
Shuqi Wu,Yang Li,Ruofei Zhang,Kelong Fan,Weihang Ding,Letong Xu,Lianbing Zhang
Multifunctional nanocomposites that possess imaging and high-performance therapeutic features are experiencing a surge in interest in the precision clinical anticancer treatment. In this work, we reported the fabrication and bio-application of a novel persistent luminescence-polypyrrole nanocomposite ( [email protected] ) for photoacoustic/persistent luminescence (PA/PL) dual-modal imaging guided photothermal therapy (PTT). The construction of [email protected] avoids the PL quenching of LPLNP-OH by the polypyrrole-coating, and thus enables the combination of PL and PTT. The [email protected] shows excellent biocompatibility, long lasting near-infrared (NIR) PL emitting without in situ excitation and high-contrast PA signals. Meanwhile, this nanocomposite exhibits strong NIR absorbance and exceptional photothermal conversion capability, which provides notable potential for imaging-guided antitumor therapy. Thus, our work highlights the dual-functional core-shell [email protected] as a feasible theranostic nanoplatform for cancer diagnosis and therapy.
研究领域:
生物医学工程
·
纳米技术
·
癌症研究
·
诊疗一体化
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产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Yiping Wu,Meng Wu,Shiwei Yang,Cong He,Chunwen Ye,Yanjie Zhang
Herein, a series of Mn-activated ZnGa2O4 (ZGO) phosphors have been developed for multifunctional applications. The characteristic green and red emission at 503 and 668 nm of Mn-activated ZGO phosphors can be observed under excitation of 247 and 375 nm, respectively, attributed to the partial oxidation of Mn2+ ions resulting in the coexistence of Mn2+ and Mn4+ ions in the host lattice. The valence modulation of Mn content not only realizes the adjustment of red and green luminescence intensity but also achieves the management of persistent luminescence time and thermo-luminescence time. Further, the codoping of Mg2+ could transform the position occupancy preference of Mn and effectively facilitate the conversion of Mn2+ to Mn4+, leading to the regulation of the valence state of manganese ions. Surprisingly, the existence of Mg2+ ions broadens the emission band of Mn4+ and enhances the photoluminescence intensity to 3.8 times, which can be ascribed to the weakened crystal field leading to the downward shift of the 4T2 energy level and the increase of Mn4+ concentration. For this valence modulation behavior, two different hypotheses about the occupancy of Mg2+ have been proposed to explain the corresponding phenomenon. Finally, the potential applications of the synthesized phosphors have been explored in advanced anticounterfeiting strategies, information storage, and plant lighting field.
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
Inorganic Chemistry Frontiers
·
2024
·
IF 6.1
Bo-Mei Liu,Yue Lin,Yingchun Liu,Shanqing Zhang,Jing Wang,Hui Zhang,Jesse Zhu
Ultraviolet (UV) emitting persistent luminescence (PersL) materials have aroused significant interest, owing to their unique self-illuminating high-photo-energy feature under excitation-free conditions. In particular, the advent of X-rays as a charging source for UV PersL has facilitated the control of PersL properties and triggered a breakthrough in possible applications such as X-ray imaging techniques, phototherapy, photocatalysis, and optical information storage. Here, we present novel PersL materials that exhibit ultra-long UV emission for over 2000 h, as detected with a spectrometer. Experimental characterization revealed that the intrinsic oxygen vacancies associated with the local structure of the perovskite LaGaO3 can function as traps, which have super capabilities in energy collection and storage triggered by X-ray irradiation. Notably, this design concept is guided by utilizing an oxygen-defect perovskite as a host, which can serve as powerful guidance for expediting the discovery of new PersL materials. Moreover, due to excellent UV PersL performances, the proposed photodynamic therapy (PDT) platform LaGaO3:Bi,Sb@g-C3N4 demonstrates excellent PDT efficiency in vivo using low-dose X-ray irradiation. Our discovery of this UV PersL material is expected to provide directional solutions and novel perspectives for the development and application of UV luminescence technology.
研究领域:
材料科学
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医学
·
光学工程
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产品关联
DOI
高影响因子
OPTICAL MATERIALS
·
2021
·
IF 3.08
Xiaohui Lai,Zhiyong Fang,Jian Zhang,Bo Wang,Wenfeng Zhu,Rui Zhang
A novel BaLu 2 Al 2 Ga 2 SiO 12 :Ce 3+ persistent phosphor was designed and synthesized through hetero-valence substituting Ba 2+ -Si 4+ ion pair for Lu 3+ -Al 3+ one in the Lu 3 Al 3 Ga 2 O 12 . XRD and Rietveld refinement results confirm the garnet typed crystal structure. SEM information shows that the constituent elements are uniformly distributed on the irregular particles. Under 360 or 430 nm excitation, the samples exhibit broad emission bands peaking at 510 nm. The luminescence intensity reaches to the maximum at 6 mol% Ce 3+ doping content, and an internal quantum efficiency of 51.2% is achieved. The concentration quenching between Ce 3+ ions is mainly originated from exchange interaction. Moreover, the phosphors exhibit bright cyan afterglow for minutes after removing the blue-light excitation source. The persistent luminescence decay process is studied by thermoluminescence spectra. The persistent luminescence mechanism and optical information writing and reading process are also discussed to explore the application in optical information storage.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
·
2024
·Vol. 26
·期 46
·28971-28979
·
IF 2.9
Yuhan Fan,Yongze Cao,Meiling Li,Sai Xu,Yichao Wang,Xizhen Zhang,Jinsu Zhang,Baojiu Chen
A series of Tb3+, Pr3+ and Dy3+ monodoped CaTa4O11(CTO) persistent luminescence (PersL) phosphors have been successfully synthesized using the molten salt method with KCl flux. The PersL color is green and orange for Tb3+ and Pr3+ or Dy3+ doped samples, respectively. The trap depth of Tb3+, Pr3+ and Dy3+ monodoped CTO is 0.33, 0.31 and 0.30 eV, respectively. The PersL time of 3 mol% Tb3+, 1 mol% Pr3+ and 1 mol% Dy3+ monodoped samples is 52.20, 35.00 and 59.46 s, respectively. Tb3+, Pr3+ and Dy3+ monodoped CTO phosphors can be used in luminescence displays and anti-counterfeit labels under commercial 254 nm UV light.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
LUMINESCENCE
·
2019
·Vol. 35
·期 1
·138-143
·
IF 1.691
Xiaoshuang Li,Lite Zhao
Energy storage phosphors with millisecond period afterglow that compensate for the diming time of alternating current light-emitting diodes (AC-LEDs) have promising application. To obtain a persistent luminescence (PersL) white colour in AC-LEDs, we focussed on a red afterglow with short period phosphorescence. Ca 4 Ti 3 O 10 forms a type of perovskite-related Ruddlesden–Popper phase structure. Doping Pr 3+ ions into Ca 4 Ti 3 O 10 , an ideal red PersL was obtained. X-ray diffraction and element analysis demonstrated that our target samples were crystallized well. Steady-state and afterglow luminescence properties were investigated in detail. Notably, the PersL intensity was dependent on various excitation wavelengths. By measuring three-dimensional thermoluminescence spectra, we found that the trap depths showed a continuous distribution and that the shallowest trap contributed to the millisecond afterglow. Two PersL mechanism models were used to elucidate the electron charging and de-trapping processes under UV or blue light activation.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2022
·
IF 5.532
Xuelian He,Hang Zhang,Feiyan Xie,Chaochao Tao,Hualan Xu,Shengliang Zhong
High luminescence intensity and long persistent duration is desired for practical application of long persistent materials. But it still remains challenging due to insufficient phosphors to meet the commercial request and a general lack of understanding of luminescence mechanism. In this work, green persistent luminescent phosphor Zn 2 SiO 4 :Mn 2+ ,Pr 3+ was first synthesized by traditional solid-state reaction method with self-made SiO 2 submicrospheres as silicon source. The morphology, crystal structure, photoluminescence and the long afterglow performance have been investigated systematically. Interestingly, the longest persistent luminescence is observed for 0.025 Mn 2+ , 0.001 Pr 3+ co-doped Zn 2 SiO 4 with a persistent time of ∼2640 s at (0.32 mcd/m 2 ), which is 20 times longer than those of Zn 2 SiO 4 host or single Mn 2+ doped Zn 2 SiO 4 phosphors. The possible persistent mechanism has been discussed. The finding will be beneficial for developing persistent phosphors with superior functionalities.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry C
·
2023
·Vol. 11
·期 13
·4492-4499
·
IF 6.4
Xulong Lv,Xihui Shan,Yi Zhang,Yanjie Liang
Photostimulated luminescence (PSL) materials have attracted considerable attention in many important fields, varying from radiation dosimetry and biomedical imaging to security encryption and optical data storage. Nevertheless, monochromatic light illumination is usually used as the stimulus source to realize the absolute separation between the PSL signal and the excitation light. Furthermore, a dark environment is considered necessary to get rid of the interference from polychromatic ambient light. Herein, we report a glow-in-the-daylight material, YBO3:Pr3+, which can emit intense and long-lasting ultraviolet-C (UVC) persistent luminescence in a bright indoor lighting or outdoor sunlight environment after ceasing X-ray excitation. We note that although the YBO3:Pr3+ phosphor shows very weak UVC afterglow in darkness, remarkable enhancement of UVC persistent luminescence can be observed in a bright ambient light environment. The UVC persistent luminescence peaking at 274 nm can last for more than 24 h under the illumination of 900 lux white LED light, and the UVC luminescence signal is free from the interference of the ambient light. This enhancement of UVC persistent luminescence is assigned to the continuous and efficient photostimulation of polychromatic ambient light, which has been confirmed by comprehensive spectroscopic investigations. The appealing glow-in-the-daylight phenomenon from the YBO3:Pr3+ phosphor will not only lay the foundation to develop more UVC persistent phosphors suitable for working in a bright environment, it will also promote the widespread use of these storage phosphors across a broad range of applications such as microbial inactivation and optical tagging.
研究领域:
材料科学
·
光学工程
·
生物医学工程
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产品关联
DOI
高影响因子
Nanoscale
·
2021
·Vol. 13
·期 18
·8514-8523
·
IF 7.79
Xiaodan Huang,Xiaojun Wei,Yan Zeng,Lihong Jing,Haoran Ning,Xiaodan Sun,Yingying Li,Di Li,Yuanping Yi,Mingyuan Gao
Spinel oxide nanocrystals are appealing hosts for Cr3+ for forming persistent luminescent nanomaterials due to their suitable fundamental bandgaps. Benefiting from their antisite defect-tolerant nature, zinc gallate doped with Cr3+ ions has become the most studied near-infrared (NIR) persistent luminescent material. However, it remains challenging to achieve persistent luminescence from its inexpensive analogs, e.g., zinc aluminate (ZnAl2O4). Because the radius difference of the cations in the latter system is bigger, it is intrinsically unfavorable for ZnAl2O4 to form Zn–Al antisite defects under mild conditions. Herein, we report a wet-chemical synthetic route for preparing Cr3+-doped ZnAl2O4 nanoparticles with long NIR persistent luminescence. It was demonstrated that methanol (MeOH) as an important component of the mixed solvent played a critical role in tailoring the morphology of the resulting ZnAl2O4:Cr nanocrystals. It could particularly drive the formation of antisite defects in the resulting coral-like nanoparticles bearing zinc-rich cores and zinc gradient peripheries. To disclose the effects of MeOH on the formation of antisite defects as well as particle morphologies, small molecules released during the pyrolysis of metal acetylacetonate precursors were analyzed by using gas chromatography-mass spectrometry. In combination with density functional theory (DFT) calculations, it was found that MeOH can effectively catalyze the thermolysis of metal acetylacetonate precursors, in particular Zn(acac)2. Therefore, MeOH exhibits remarkable effects on the formation of antisite defects by balancing the decomposition rates of Zn(acac)2 and Al(acac)3 through its volume fraction in the reaction system. This work thus constitutes a hitherto less common strategy for achieving NIR persistent luminescence from Cr3+-doped ZnAl2O4 nanoparticles by engineering the cation defects under mild conditions.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）