Journal of Materials Chemistry C
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2022
·Vol. 10
·期 44
·16670-16678
·
IF 8.067
Peishan Shao,Puxian Xiong,Yao Xiao,Qianyi Chen,Yongsheng Sun,Na Yan,Dongdan Chen,Zhongmin Yang
Mechanoluminescent (ML) materials, which can emit light under external mechanical stimuli, have attracted much interest in diverse applications such as stress sensing, anti-counterfeiting and 3D signatures. However, ML materials located within the ultraviolet (UV) spectral range are still limited. In this study, a series of LixY0.995GeO4:0.005Bi3+ (0.898 ≤ x ≤ 1.003) samples are synthesized by a high temperature solid-state reaction method. The crystal structure, ML, persistent luminescence (PersL) and photoluminescence (PL) are systematically studied. The excellent UVA PersL of LiYGeO4:Bi3+ can be ascribed to the existence of abundant trap sites created by the intentional loss of Li+ ions, which can improve the ML properties of the phosphors. This excellent material can make up for the deficiency of PersL materials in the UVA region (315–450 nm), and it may greatly expand the application of ML materials in the biomedical, energy and catalysis fields.
研究领域:
材料科学
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光学
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生物医学工程
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DOI
高影响因子
Laser & Photonics Reviews
·
2025
·
IF 10
Haijie Guo,Lili Liu,Lei Wang,Qiufeng Shi,Jianwei Qiao,Cai'e Cui,Ping Huang,Yuhua Wang
Optical information storage technology offers several advantages, including cost-effectiveness, multidimensional storage, and rewritable capability. Consequently, it has become increasingly popular for optical storage media. Herein, a novel optical information storage material Na 2 CaGe 2 O 6 :Bi 3+ (NCGO:Bi 3+ ) is developed using a non-equivalent substitution strategy, which exhibits photochromic (PC) and ultraviolet persistent luminescence (UV PersL) properties. NCGO:Bi 3+ demonstrates excellent white-to-brown PC performance under 254 nm light irradiation. The brown phosphor can be effectively bleached using 425 nm light or thermal stimulation, demonstrating excellent reversibility over multiple cycles. Additionally, the phosphor displays UV PersL characteristics. The representative sample NCGO:0.001Bi 3+ with a duration time exceeding 10 h after 254 nm light excitation, peaking at 358 nm. Simultaneously, due to the electrons captured by deep traps can be released via low-energy light excitation, the sample also exhibits photostimulated PersL characteristics. Specifically, oxygen vacancies (V O ) are identified the primarily responsible for the observed PC and PersL phenomena by X-ray photoelectron spectroscopy (XPS) and electron paramagnetic resonance (EPR) analyses. Overall, this work indicates that the combination of 254 nm light-induced PC and PersL in a single material has potential for designing advanced luminescent materials for the application of 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
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Shenghui Zheng,Yafang Chen,Kaihui Lin,Liting Qiu,Zhixia Zheng,Yiqing Cao,Yuda Lin
X-ray Stimulated ultraviolet (UV) persistent luminescence (PersL) materials are considered the optimal choice for optical imaging in X-ray imaging encryption applications due to their excitation source and emission spectra being invisible to the human eyes. However, the efficiency of X-ray excited UV PersL materials are currently limited, particularly when compared to those excited by UV. There is a need to develop UV PersL materials that can be efficiently excited by X-ray. Here we present a novel UV PersL material YBO 3 :Bi 3+ ,Li + , which exhibits high efficiency after X-ray excitation and holds promise for applications in X-ray image encryption. Through optimization of Bi 3+ concentration and addition of Li + , YBO 3 :Bi 3+ ,Li + demonstrates the capability to emit UV PersL at 326 nm after X-ray excitation, lasting for over 40 h. In addition, the experimental characterization also revealed that YBO 3 :Bi 3+ ,Li + have excellent photo-stimulated luminescence effects on white light, red light and near-infrared light sources. Furthermore, the proposed dual-mode detection capabilities demonstrate a high level of confidentiality in X-ray encryption imaging applications by leveraging excellent UV PersL performances and utilizing short time X-ray excitation.
研究领域:
材料科学
·
光学
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Yao Xiao,Puxian Xiong,Shuai Zhang,Kang Chen,Shuhang Tian,Yongsheng Sun,Peishan Shao,Kexin Qin,Mikhail G. Brik,Shi Ye,Dongdan Chen,Zhongmin Yang
Developing deep-red to near infrared (NIR) materials with multi-mode luminescence is challenging, which has promising utilization in various applications such as stress sensing and dynamic signature anti-counterfeiting. Different to the mainstream non-centrosymmetric mechanoluminescence (ML), a centrosymmetric perovskite compound (MgGeO 3 : Mn 2+ ) ML material is reported. Deep-red to NIR light (600–800 nm) from Mn 2+ ion is confirmed, which is attributed to the strong crystal field within the [MgO 6 ] polyhedron. The stiffness tetrahedral units and large defect accommodating space within the host are favorable for both ML and persistent luminescence (PersL). Mn 2+ ion is the only luminescent center, which is confirmed by spectral characterizations. Based on diffuse reflectance spectra, thermoluminescence analysis and density functional theory calculations, the inherent relationship between PersL, ML and PL is further clarified in detail. Due to the formation of Mn Mg defects, shallow trap significantly become shallower after adding Mn 2+ ions. This study reports a Mn 2+ -doped deep-red to NIR ML phosphor, and further describes the PersL and ML mechanisms via defect engineering regulation. In general, this study may also open up a new approach for the development of efficient NIR ML materials, and show various potential applications such as in anti-counterfeiting and information encryption fields.
研究领域:
材料科学
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光学
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Ying Lv,Ning Zhao,Chaofeng Li,Cunjian Lin,Shihai You
Efficient and stable persistent phosphors play a crucial role in the fields of energy storage, anti-counterfeiting, and biomedical fields. Here, we present an improved synthetic method for preparing a series of color-tunable LiYGeO 4 :Tb 3+ persistent phosphor. The increased Tb 3+ concentration in the improved method enhances the persistent luminescent intensity at 20 s by ∼2.96 times. This enhancement is due to the dual roles of Tb 3+ as both emitters and trap centers within LiYGeO 4 . By simply increasing the doping concentrations, the persistent color can be adjusted from blue to green. LiYGeO 4 :Tb 3+ exhibits no loss of persistent luminescent intensity even after exposure to water at 80 °C for 72 h, surpassing the commercial green persistent phosphor. Furthermore, information storage was successful demonstrated by using LiYGeO 4 :Tb 3+ with various doping concentrations. This study represents a significant advancement in optimizing the properties of persistent luminescent materials, where dopants simultaneously serve as emitters and trap centers.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
INORGANIC CHEMISTRY
·
2019
·
IF 4.85
Zhizhen Wang,Zhen Song,Lixin Ning,Zhiguo Xia,Quanlin Liu
The Sr3SiO5:Eu2+ phosphor has attracted considerable attention for applications in white LEDs owing to its highly efficient yellow emission under violet-blue excitation. We report herein an enhancement of yellow persistent luminescence in Sr3SiO5:Eu2+ through Ge incorporation. The strongest persistent luminescence intensity is observed for Sr3(Si1–xGex)O5:Eu2+ with x = 0.005 with a peak emission wavelength at ∼580 nm and a persistent time of ∼7000 s at the 0.32 mcd/m2 threshold value after UV radiation. A combination of thermoluminescence measurements and density functional theory (DFT) calculations reveals that the afterglow enhancement is due to a significant increase in the number of oxygen vacancies that act as electron trapping centers with appropriate trap depths. This investigation is anticipated to encourage more exploration of GeSi substitution to design and improve Si-containing persistent phosphors with superior functionalities.
研究领域:
材料科学
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光学
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2018
·
IF 3.057
Zhiwu Liu,Yanfeng Ding,Chaocan Zheng Yuan Meng,Jing Tang,Qianping Qiu
Nowadays, exploring new photonic materials that can efficiently convert the invisible light into the visible light have attracted tremendous attention in the catalytic field. Here, we design and prepare a kind of Bi 3+ doped Lu 2 CaGeO 6 phosphor by using the solid-state reaction at 1250 °C in air for 5 h. The structural analysis, which is based mainly on the powder X-ray diffraction (XRD) spectra, shows that the as-prepared Bi 3+ doped Lu 2 CaGeO 6 phosphors belong to a trigonal structure with a space group of R 3 (No. 146). The photoluminescence (PL) results reveal that changing the excitation wavelengths from 240 nm to 340 nm does not change the emission sharp and position of the Bi 3+ doped samples, allowing the maximum emission intensity to keep at 420 nm. Except for the fluorescence, up exposure to the UV light ( e.g. , 254 nm), the Lu 2 CaGeO 6 :Bi 3+ phosphors can also exhibit the Bi 3+ -related blue afterglow luminescence. The longest afterglow duration that corresponds to the 1.5%Bi 3+ doping content in the Lu 2 CaGeO 6 crystal host can last 30 min in the dark. After comparing the Bi 3+ -related blue afterglow band to the band gap of TiO 2 semiconductor that corresponds to the wavelength of 387 nm, it clearly indicates us that the Bi 3+ doped Lu 2 CaGeO 6 phosphors can serve as a continous excitation source for light-sensitive TiO 2 semiconductor for photocatalysis application.
研究领域:
材料科学
·
光化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF APPLIED PHYSICS
·
2021
·Vol. 129
·期 12
·
IF 2.546
Liu Bo-Mei,Gan Wei-Jiang,Lou Sun-Qi,Zou Rui,Tang Qiang,Wang Cheng-Xin,Jiao Ju,Wang Jing
The development of functionalized persistent-luminescent (PersL) materials is currently receiving intense interest for diverse applications. However, PersL materials emitting ultraviolet light in the 315–400 nm (UVA) range are lacking. Herein, a series of x-ray-activated PersL materials based on ABCO 4 -type structures with random cation arrangements are developed. Comprehensive experiments confirm that materials featuring random cation arrangements are sufficiently general to act as host materials for PersL. Experimental results indicate that as-synthesized SrLaXO 4 :Bi 3+ (X = Al, Ga, In) powders have tunable PersL bands covering the UV-to-visible range after x-ray irradiation. Taking advantage of the depth-independent nature of x-ray illumination in tissues, UVA Persl composites using the matched photosensitizer g-C 3 N 4 (SrLaAlO 4 :Bi@g-C 3 N 4 ) are well suited for x-ray-activated photodynamic therapy, as proven by tests for singlet-oxygen ( 1 O 2 ) generation. Therefore, we suggest that the proposed concept be applied to discover additional functionalized PersL materials for clinical cancer therapy in the future.
研究领域:
材料科学
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医学
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生物工程
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Meng Wu,Yiping Wu,Hao Song,Yanjie Zhang
Traditional anti-counterfeiting technology based on fluorescent materials is usually single-color emission and far from enough to meet the growing demand for anti-counterfeiting with high-level security. Here, dual luminescent centers with blue emission at 470 nm and green-yellow emission at 546 nm have been successfully achieved by controlling the Eu 2+ sites in the Sr x Ba 1-x Si 2 O 2 N 2 (x = 0.25–0.50) host lattices via fine-tuning of Sr contents (x). Notably, Sr 0.50 Ba 0.50 Si 2 O 2 N 2 : 0.02Eu 2+ exhibits particular optical information storage properties with intense yellow emission and can repeat the corresponding image patterns under the thermal stimulus, which can be regarded as an essential candidate in multicolor anti-counterfeiting technology. Further, the different luminescent center-trap center pairings have been found in Sr 0.33 Ba 0.67 Si 2 O 2 N 2 : 0.02Eu 2+ due to the substitution of Ba 2+ and Sr 2+ by Eu 2+ to generate blue and yellow luminescent centers and the substitution of N 3− for O 2− in the Sr and Ba lattices resulting in oxygen vacancies. Typically, Sr 0.33 Ba 0.67 Si 2 O 2 N 2 : 0.02Eu 2+ exhibits a cool white emission in photoluminescence (PL) mode and changes to yellow emission in persistent luminescence (PersL) mode. Moreover, Sr 0.33 Ba 0.67 Si 2 O 2 N 2 : 0.02Eu 2+ displays a thermochromic phenomenon (from cool white emission to blue emission) in thermally stimulated luminescence (TSL) mode, attributed to the different trap depths in Sr and Ba lattice. Hence, flexible film for optical information storage and patterns for multimodal dynamic anti-counterfeiting are fabricated using Sr 0.33 Ba 0.67 Si 2 O 2 N 2 : 0.02Eu 2+ . Finally, a dynamic optical information encryption and decryption strategy for Morse code is developed based on the different properties of Sr x Ba 1-x Si 2 O 2 N 2 : 0.02Eu 2+ (x = 0.25, 0.30, 0.33, and 0.50). The results demonstrate that Sr x Ba 1-x Si 2 O 2 N 2 : 0.02Eu 2+ (x = 0.25–0.50) phosphors can be potential candidates in optical information storage and optical anti-counterfeiting applications.
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
ACS Nano
·
2025
·
IF 16
Bing Qi,Wenjing Dai,Bibo Lou,Bin Song,Ziyun Miao,Yurong Wei,Chonggeng Ma,Jie Wang
Lanthanides are widely codoped in persistent luminescence phosphors (PLPs) to elevate defect concentration and enhance luminescence efficiency. However, the deleterious cross-relaxation between activators and lanthanides inevitably quenches persistent luminescence, particularly in heavily doped phosphors. Herein, we report a core–shell engineering strategy to minimize the unwanted cross-relaxation but retain the charge trapping capacity of heavily doped persistent luminescence phosphors by confining the activators and lanthanides in the core and shell, respectively. As a proof of concept, we prepared a series of codoped ZnGa2O4:Cr, Ln (CD-Ln, Ln = Nd, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb) and core–shell structured ZnGa2O4:Cr@ZnGa2O4:Ln (CS-Ln) nanoparticles. First-principles investigations suggested that lanthanide doping elevated the electron trap concentration for enhancing persistent luminescence, but energy transfer (ET) from Cr3+ to Ln3+ ions quenched the persistent luminescence. The spatial separation of Cr3+ and Ln3+ ions in the core–shell structured CS-Ln nanoparticles suppressed the ET from Cr3+ to Ln3+. Due to the efficient suppression of deleterious ET, the optimal doping concentration of Ln in CS-Ln was elevated 50 times compared to CD-Ln. Moreover, the persistent luminescence intensity of CS-5%Ln was up to 60 times that of the original ZnGa2O4:Cr. The CS-5%Ln displayed significantly improved signal-to-noise ratios in bioimaging. Further, the CS-Ln was interfaced with the lycopene-producing bacteria Rhodopseudomonas palustris for solar-to-chemical synthesis, and the lycopene productivity was increased by 190%. This work provides a reliable solution to fulfill the potential of lanthanides in enhancing persistent luminescence and can further promote the applications of persistent luminescence phosphors in biomedicine and solar-to-chemical synthesis.
研究领域:
材料科学
·
生物医学
·
光化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Hong Li,Junfeng Zheng,Yanpeng Dai,Dongying Li,Xiangting Zhang
CdSiO 3 , with its distinctive crystal structure, has become a subject of considerable interest as a potential silicate host for long persistent luminescence (LPL) phosphors. However, in most cases, impurity phases in the host adversely affect the persistent luminescence (PersL) performance. Furthermore, there is still a lack of insightful understanding regarding the role of non-rare-earth (non-RE) In 3+ ions in the enhanced blue PersL of CdSiO 3 . Here, pure-phase monoclinic CdSiO 3 phosphor is synthesized through a solid-state reaction method and the intense blue PersL is achieved by aliovalent doping of In 3+ . Combining experimental results with theoretical calculation, we reveal that the intrinsic defects of O and Cd vacancies in CdSiO 3 are the trap centers for excited electrons and holes, respectively. In 3+ doping adjusts the distribution and increases the density of intrinsic defect-related traps, thus producing the intense blue PersL in CdSiO 3 :In 3+ . Moreover, the generality of In 3+ in enhancing the PersL properties is validated in CdSiO 3 :Mn 2+ ,In 3+ and CdSiO 3 :RE 3+ ,In 3+ (RE = Tb, Dy, Pr, Sm, Eu) phosphors, enriching the spectrum of PersL emission colors. Encouraged by the outstanding optical properties of CdSiO 3 :Mn 2+ ,In 3+ , we demonstrate dual-mode information storage-reading and dynamic information encryption applications. This advancement opens new avenues for the application of optical information security. This work emphasizes the key role of In 3+ in adjusting the distribution and increasing the density of intrinsic defect-related traps. Consequently, it reveals a clear mechanism for enhancing PersL through In 3+ doping and expands the range of LPL phosphors with broad spectral selectivity.
研究领域:
材料科学
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光学工程
·
信息加密技术
✓ 已验证
产品关联
DOI
高影响因子
Communications Materials
·
2025
·Vol. 6
·期 1
·1-8
·
IF 9.6
Lin Cunjian,Yang Rujun,Wu Zishuang,Wang Yajing,Zhan Chenhan,Miyata Hirohisa,Zeng Xiankan,Zheng Yuantian,You Shihai,Lv Ying,Zhuang Yixi,Xie Rong-Jun,Ueda Jumpei
Persistent luminescence (PersL) in inorganic materials, lasting from seconds to even days, has attracted considerable attention. Despite the promise of electric power-driven PersL for lighting and display device applications due to its convenience and manageability, studies on electrically driven inorganic PersL are lacking. Here, we report an inorganic PersL in electroluminescent devices, which shows an energy storage effect that persists beyond 24 h after charging with an alternating current electric field at 250 K. The spin-coating method-prepared emission layer composites consist of a small bandgap copper-doped zinc sulfide core, a high dielectric constant alumina shell and a chemically passivated dielectric polydimethylsiloxane medium (ZnS:Cu@AlO x @PDMS), and these composites exhibit well-distributed electric fields and excellent operational stability. Thermoluminescence characterization reveal that PersL with an ~ 0.3 eV trap depth in electroluminescent devices mainly arises from the charge separation via hot-electron impact excitation and charge trapping within trap states in the emission layer. This study on electrically chargeable PersL in alternating current-driven electroluminescent devices can enhance our understanding of luminescence mechanisms in inorganic semiconductors.
研究领域:
材料科学
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光学工程
·
半导体物理
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）