JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Mengdi Ye,Yongmin Duan,Zhaojing Kuang,Wenyan Zheng,Junjie Zhang
With the advancement of modern optics and information technology, luminescent reversible photochromic transparent glasses have attracted considerable attention due to their potential for multimodal data storage. Cadmium-based glasses exhibit excellent photochromic performance, however, their underlying mechanism remains insufficiently elucidated. In this work, Tb 3+ -doped transparent cadmium glass was fabricated, which underwent a rapid transition from transparent to dark brown within 60 s under 365 nm UV irradiation, and completely recovered to transparency upon thermal treatment at 200 ℃, demonstrating high reversibility and cycling stability. X-ray photoelectron spectroscopy (XPS) and electron paramagnetic resonance (EPR) analyses revealed that the photochromism is primarily governed by oxygen-vacancy-related color centers, wherein Cd sites serve as electron-enriched centers while Pb-O environments accommodate localized holes. Their spatially coupled charge compensation stabilizes the color centers and sustains reversibility. On this basis, reversible modulation of Tb 3+ luminescence was achieved, with a maximum emission contrast of 93.9 %. This study clarifies the mechanism of cadmium-based photochromic glass from the perspective of defect-charge compensation and provides insights into the design of multifunctional glasses for optical information storage.
研究领域:
材料科学
·
光学材料
·
光子学
·
固态化学
·
信息存储技术
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产品关联
DOI
高影响因子
DALTON TRANSACTIONS
·
2013
·Vol. 42
·期 27
·9852-9861
·
IF 3.806
Yuan Wu,Dongmei Yang,Xiaojiao Kang,Ping'an Ma,Shanshan Huang,Yang Zhang,Chunxia Li,Jun Lin
Multifunctional nanocomposites integrating mesoporous and luminescence properties into a single entity are synthesized via a facile and effective approach. Oleic acid capped β-NaYF4:Ce3+/Tb3+ nanoparticles (NPs) are transferred into aqueous solution by cetyltrimethylammonium bromide (CTAB) surfactants, and further encapsulated with uniform mesoporous silica shell followed by the surface modification with poly(ethylene glycol) (PEG), leading to the formation of water-dispersible and biocompatible core–shell structured β-NaYF4:Ce3+/Tb3+@mSiO2-PEG (denoted as NPs@mSiO2-PEG) nanospheres. The as-synthesized nanospheres show a typical mesoporous structure and a green emission under UV irradiation. Doxorubicin hydrochloride (DOX), a widely used anti-cancer drug, is used as a model drug to evaluate the loading and controlled release behaviors of the NPs@mSiO2-PEG in phosphoric acidic buffer solutions (PBS) at different pH values (pH = 7.4 and 5.0). The composite carriers provide a pH-sensitive drug release pattern and the drug releases faster under lower pH value. The endocytosis process of fluorescein isothiocyanate (FITC)-labelled nanospheres is characterized using flow cytometry and confocal laser scanning microscopy (CLSM) against A549 cells. The in vitro cytotoxic effect against A549 cells of the DOX-loaded carriers is investigated in detail. In addition, the extent of drug release can be monitored by the variation of photoluminescence (PL) intensity of β-NaYF4:Ce3+/Tb3+. Considering the good biocompatibility and pH-dependent drug release pattern, such core–shell structured luminescent NPs@mSiO2-PEG nanospheres have potential applications in controlled drug delivery.
研究领域:
生物材料
·
纳米医学
·
肿瘤学
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DOI
PubMed
高影响因子
CRYSTENGCOMM
·
2026
·
IF 2.6
Jiaqi Zhang,Zhiyu Qin,Langping Dong,Baiqi Shao,Jingshan Hou,Yongzheng Fang
A novel green-emitting phosphor, Ca2HfSi4O12:Ce3+, Tb3+ (CHSO:Ce3+, Tb3+), was successfully fabricated via a conventional solid-state reaction under high-temperature conditions. The phosphor shows two broad excitation bands (200-400 nm), which can be attributed to the characteristic 4f → 5d electronic transitions of Ce3+ ions. As an efficient sensitizer, Ce3+ transfers absorbed ultraviolet energy to Tb3+ ions, resulting in a strong green luminescence peaking at 543 nm when excited at 330 nm. The optimized composition, CHSO:0.02Ce3+, 0.035Tb3+, exhibits a high internal quantum efficiency (IQE) of 88.65% and an external quantum efficiency (EQE) of 54.0% under 330 nm excitation, together with excellent luminous thermal stability, maintaining 90% of its emission intensity at 393 K. White light-emitting diodes (WLEDs) were assembled using CHSO:Ce3+,Tb3+ in conjunction with a 310 nm UV chip and commercial blue BaMgAl10O17:Eu2+ and red (Ca, Sr)AlSiN3:Eu2+ phosphors, yielding a high color rendering index (Ra = 90.2) and a correlated color temperature of 5157 K. These findings highlight CHSO:Ce3+, Tb3+ as an efficient and thermally stable green phosphor with significant potential for UV-pumped WLED applications.
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DOI
高影响因子
DALTON TRANSACTIONS
·
2024
·Vol. 53
·期 11
·5202-5211
·
IF 3.5
Die Hu,Ran Xiao,Xiang Lv,Chunwei Yang,Jianxia Liu,Yuefeng Zhao,Ning Guo
The realization of thermally stable Tb3+-doped green emission at high temperatures in solid-state lighting is still a crucial challenge. Nevertheless, the study on modulating the thermally stable luminescence at high temperatures is seldom reported. The position of the intervalence charge transfer (IVCT) energy level is used to systematically investigate the thermal quenching performance of Tb3+-activated green-emitting phosphors with varying concentration gradients of Gd1−xTaO4:xTb3+ (x = 0.1%, 0.5%, and 2%) in this study. The IVCT energy levels were determined according to the empirical formula to show a decreasing trend, consistent with the position of the IVCT energy levels measured in the excitation and diffuse reflectance spectra. Moreover, the thermal quenching performance of different wavelength excitation positions (host absorption, 4f–5d of Tb3+, and Tb3+–Ta5+ IVCT band) is quite different. The modulation of thermal quenching performance among distinct phosphors when subjected to host excitation or IVCT excitation can be elucidated through optimal positions within the energy levels associated with IVCT. The diverse concentration gradient samples exhibit varying degrees of thermal quenching performance in the variable-temperature spectra. The fluorescence lifetimes of the samples are generally comparable but slightly lower. The quantum efficiency rapidly improves as the Tb concentration increases. The underlying mechanism governing this phenomenon is elucidated by constructing a model that encapsulates the interplay between the compensating and quenching channels, in addition to the energy conversion of Tb3+ into Gd3+. The abovementioned results indicate that the dual driving scheme of the doping concentration and excitation wavelength is an effective means to regulate the thermal quenching performance of Tb-activated green-emitting tantalate phosphors.
研究领域:
材料科学
·
发光材料
·
固体化学
·
光电子学
·
无机功能材料
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DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2023
·
IF 8.4
Xiaofan Ge,Zuoling Fu
The rational exploration of lanthanide-doped phosphors is of great significance for realizing precise optical temperature sensing and information security applications. Here, triple-wavelength responsive Ba2Ga2GeO7:Er3+ phosphors were synthesized by a solid-state method, and the samples gave highly pure green emissions under 808 and 382 nm excitations. Within the temperature range from 313 to 573 K, the corresponding temperature sensing performance based on the fluorescence intensity ratio was estimated, and the maximum relative sensing sensitivities were determined to be 0.97%, 1.20%, and 1.19% K–1 for the 980, 808, and 382 nm excitations, respectively, indicating the title materials are promising for use in temperature sensors. Furthermore, the introduction of Tb3+ enables the materials to realize down conversion luminescence and long persistent luminescence, which greatly enrich the luminescence phenomena of the samples. Based on the abundant emission modes, novel information encryption strategies of digital displays and binary digital-ASCII multiplex codes are proposed, which provide reliable guidance on advanced visualized information encryption.
研究领域:
材料科学
·
光学传感
·
发光材料
·
信息安全
·
光子学
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DOI
高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
·
2022
·
IF 3.656
Qibing Li,Yingying Zhang,Zhijie Wu,Tianhui Wang,Jianbei Qiu,Zhiguo Song,Yongjin Li
In this work, a series of Yb 3+ /Tb 3+ co-doped BiOBr nanosheets were synthesized by a simple solvothermal method, and the effect of Tb 3+ and Yb 3+ doping on the up-conversion (UC) luminescence was investigated. Under the excitation of 980 nm, BiOBr: Yb 3+ /Tb 3+ nanosheets displayed emission bands at 494, 544, 584 and 622 nm arise from transitions 5 D 4 → 7 F J ( J = 6, 5, 4, 3) of Tb 3+ ions, respectively. Furthermore, the concentration dependence of UC luminescence was comprehensively explored, and the BiOBr:15%Yb 3+ /3%Tb 3+ nanosheets exhibited the most outstanding luminescent properties by the cooperative energy transfer. Moreover, the degradation rate of RhB by Yb 3+ /Tb 3+ co-doped BiOBr reaches 98.9% for 30 min under full spectral irradiation, and 51.7% for 5 h under 980 nm irradiation, respectively. This work proves that Yb 3+ /Tb 3+ co-doped BiOBr nanosheets have excellent green UC emission and have potential application in the field of near infrared activated photocatalysts .
研究领域:
材料科学
·
光催化
·
发光材料
·
纳米材料
·
稀土掺杂
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DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2026
·
IF 6.3
Wenya Lai,Qing Han,Hangqing Xie,Jing Xu,Jiadi Lian,Shiqing Xu
Lanthanide complex crystals represent an important class of scintillation materials; however, their radioluminescence performance remains limited due to a lack of versatile strategies for precise regulation. Here, we develop an organic doping strategy and synthesize a Tb complex (Tb-BDC-OAc) crystal of Tb 3+ coordinated with 1,4-dicarboxybenzene (H 2 BDC) and acetic acid (dopant, OAc - ). After systematic optimization, the Tb-BDC-OAc₂ crystal achieves a photoluminescence quantum yield (PLQY) of up to 96.4 % under 330 nm excitation, which we attribute to improved triplet exciton dynamics that enhance ligand-to-Tb 3+ energy transfer. In contrast, excitation at 368 nm—directly targeting Tb 3+ —yields an even greater PLQY enhancement of 19.1 %, driven by crystal-field perturbation tuning via OAc - doping. This dual mechanism synergistically increases the light yield to 19400 photons MeV −1 while maintaining exceptional stability (99.8 % light yield retention after 30 days in ambient conditions). The crystal’s tailored energy-level alignment and suppressed afterglow (<1 s decay) enable ultrasensitive X-ray detection with a record-low limit of 15.77 nGy s −1 . By decoupling triplet exciton regulation (330 nm excitation) from crystal-field engineering (368/377 nm excitation), this work establishes a paradigm for designing high-efficiency, low-cost scintillators for biomedical imaging and radiation monitoring.
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产品关联
DOI
高影响因子
Chinese Physics B
·
2026
·Vol. 35
·期 1
·017801
·
IF 1.6
Mengyu Zhang,Shujing Pan,Haitang Hu,Wenzhi Su,Yong Zou,Shoujun Ding,Qingli Zhang
Conventional Tb3+-doped phosphors typically suffer from concentration quenching once the doping level exceeds a critical threshold. Consequently, the development of Tb3+ phosphors with intrinsic resistance to concentration quenching has become a key research focus. In this work, we successfully synthesized KBi(MoO4)2: xTb3+ (x = 0–100 at%) (denoted as KBM: xTb3+) phosphors via a high-temperature solid-state reaction. Remarkably, no concentration quenching was observed across the entire doping range. This anti-quenching behavior originates from the large Tb3+–Tb3+ interionic distance (> 5 Å) inherent to the quasi-layered crystal structure, which effectively suppresses multipole-interaction-mediated energy migration. At full Tb3+ substitution (x = 100 at%), the material undergoes a structural phase transition from the monoclinic KBM phase to the triclinic α-KTb(MoO4)2 (α-KTM) phase. The α-KTM phosphor exhibits excellent thermal stability (activation energy = 0.6129 eV) and a single-exponential decay profile, whereas KBM: xTb3+ (x < 100%) display double-exponential decay behaviors, attributed to dual energy transfer pathways. These findings provide new insights into the luminescence mechanisms of high-concentration rare-earth-doped systems and offer guidance for designing next-generation anti-quenching phosphors.
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DOI
高影响因子
DALTON TRANSACTIONS
·
2026
·
IF 3.3
Mishal Iftikhar,Sadegh Ghorbanzadeh,Wei Zhang
Tb3+/Gd3+-codoped BiF3 nanoparticles were synthesized via a controlled, room-temperature co-precipitation method to address the critical challenge of low photoluminescence (PL) quantum efficiency in singly Tb3+-doped fluoride phosphors. Structural analysis confirmed a stable cubic phase (Fmm) with successful substitutional doping on Bi3+ sites. At the optimal 5 : 5 mol% Tb : Gd ratio, a quantum yield of 13.5%—a fourfold enhancement over Tb3+-only systems—was achieved. The mechanism of enhancement operates through two complementary, excitation-wavelength-dependent pathways: (I) Under short-UV irradiation (230–260 nm), Gd3+ acts as a sensitizer—harvesting photons via its 8S7/2 → 6IJ/6PJ transitions and transferring energy to Tb3+ via resonance Gd3+ → Tb3+ energy transfer, directly proven by excitation spectroscopy. (II) Under 365 nm excitation—where Tb3+ is the primary absorber and Gd3+ absorbs negligibly—Gd3+ enhances PL efficiency through a complementary crystal field modification mechanism: Gd3+ substitution modifies the local phonon environment around bulk Tb3+ sites, reducing the non-radiative depopulation rate of the 5D4 excited state. This is directly evidenced by time-resolved PL decay showing +65% and +87% elongation of Tb3+ bulk lifetime components (τ2 and τ3) upon co-doping. CIE chromaticity analysis confirms high-purity green emission. These findings provide dual-mechanism characterization of Gd3+/Tb3+ co-doping in BiF3, establishing a rational design framework for Gd3+-enhanced lanthanide phosphors.
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DOI
PubMed
高影响因子
INORGANIC CHEMISTRY
·
2020
·
IF 4.825
Dan Zhang,Xiangting Zhang,Zhengce An,Rujia Dong,Zhan Shi,Yanhua Song,Haifeng Zou
Here, the crystal structure, phase analysis, site occupancy, and luminescence properties of NCMP:Eu2+,Tb3+,Mn2+ have been studied for the first time. Under 335 nm ultraviolet excitation, the NCMP:Eu2+ phosphors show narrow-band blue emission. In addition, we discuss the reason for a continuous red shift for the emission spectra of NCMP:xEu2+ by raising the x value. The efficient ET processes of Eu2+ → Tb3+ and Eu2+ → Mn2+ were investigated by the luminescence spectra and decay curves. The ET efficiencies reach 92.58% at y = 0.15 for NCMP:0.01Eu2+,yTb3+ and 99.85% at z = 0.15 for NCMP:0.01Eu2+,zMn2+ phosphors, respectively. The efficient energy transfer processes greatly improve the quantum efficiency, luminous intensity, and thermal stability. Bright green and red emissions can be realized through changing the related ratio of Eu2+, Tb3+, and Mn2+. In addition, the excellent performance of the prepared white LED lamps utilizing a 385 nm chip combined with our prepared NCMP:Eu2+,Tb3+/Mn2+ phosphors indicates that NCMP:0.01Eu2+,yTb3+ and NCMP:0.01Eu2+,zMn2+ phosphors can be potential green and red phosphors for white LEDs.
研究领域:
材料科学
·
光学
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DOI
高影响因子
JOURNAL OF RARE EARTHS
·
2026
·
IF 9.6
Zhengren Tao,Lingying Xu,Yinghan Wang,Qingdi Liu,Shi Ye
Bulk ceramics of afterglow phosphors are preferred for real applications with applied external stimuli like electric field, force and heat. However, sintering powdered afterglow phosphors with high-temperature-volatile components to bulk form normally leads to deterioration or even loss of persistent luminescence (PersL), such as the case of LiTaO 3 :Tb 3+ . This study adopted a strategy of using nanosized precursors prepared by exfoliation and molten salts methods for the subsequent sintering procedure to form LiTaO 3 :1 mol% Tb 3+ bulk nanoceramics, which show outstanding PersL compared to bulk microceramics with absence of PersL. The dynamics of carriers, including electrons, holes and non-static V Li defects were detailedly investigated in the charging process of the bulk nanoceramics at elevated temperatures. It is found that defects not only act as traps storing and releasing electron-hole carriers, but also function as carriers themselves in the LiTaO 3 :1%Tb 3+ bulk nanoceramics. Temperature-dependent electricity and luminescence verify the hopping process of Li + / V Li above 225 °C . The hopping leads to accelerated release of holes initially captured by V Li and the subsequent non-radiative recombination with electrons from V O . It features an apparent and significant intensity decline during the charging process compared to low temperatures or cases without PersL. The bulk nanoceramics possess a temperature-triggered capability for anti-counterfeiting and information storage. These findings contribute to a strategy to fabricate bulk ceramics which are sensitive to sintering procedure, and provide valuable insights into the underlying mechanisms and the rational design of PersL materials.
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DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Jin Liu,Yaowei Guo,Yupeng Bi,Yao Wang,Yanxin Wang,Matt J. Kipper,Laurence A. Belfiore,Jianguo Tang
Reversible bright-dark luminescence nanomaterials have been developed for information storage and anti-counterfeiting in recent years, however, their monochrome characteristic and 2D patterning impose limits on the effective information storage density. In this work, a new strategy for producing ultraviolet switchable and stable luminescent patterns is proposed, based on Ln 3+ (Eu 3+ /Tb 3+ ) induced-polyelectrolyte aggregates (LIPAs) with sharp multi-color optical properties . Under 365 nm excitation, a multicolor pattern can be observed using both red and green, which is not visible when this excitation light source is off. The LIPAs enable the luminescent lanthanide complexes to be compatibilized with poly(lactic acid) (PLA). Functional anti-counterfeiting patterns were prepared by 3D printing using luminescent PLA containing by Ln 3+ (Eu 3+ /Tb 3+ ) LIPAs. Invisible, adjustable and ultra-stable multicolor luminescent patterns well enable information storage and enhance information security for anti-counterfeiting applications.
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DOI
高影响因子
危险品化学品经营许可证（带存储）