DYES AND PIGMENTS
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2024
·
IF 4.1
Yongjie Wang,Qingzhou Bu,Dongshuo Li,Shuai Yang,Li Li,Guotao Xiang,Sha Jiang,Ying Chang,Chuan Jing,Xianju Zhou,Lev-Ivan Bulyk,Andrzej Suchocki
Near-infrared phosphor-converted light-emitting diodes (NIR pc-LEDs) are compact light sources of great interest for NIR spectroscopy applications. Beyond typical Cr 3+ -activated NIR-emitting phosphors, there exists a strong demand for Cr 3+ -free alternatives with high efficiency and broadband emission to rich the landscape of NIR luminescent materials and extend their range of application fields. Here, we report a series of Fe 3+ -activated Ca 3 Ga 2 Sn 3 O 12 garnet-type phosphors exhibiting broadband NIR emission in the 650–1000 nm range attributed to 4 T 1 (G) → 6 A 1 (S) transition, with a maximum at 754 nm and a FWHM of 89 nm upon UV excitation. The spectroscopic results were analyzed according to the Tanabe-Sugano theory from which the crystal field parameter D q and Racah parameters B and C were obtained for the octahedrally coordinated Fe 3+ ion. Notably, the NIR persistent luminescence lasting over 1 h was detected following UV or X-ray irradiation. The possible mechanism involving electron traps was proposed to explain the observed persistent luminescence. Furthermore, a NIR pc-LED was fabricated by coating synthesized phosphor on a UV chip, and its performance was evaluated to assess its potential suitability as a NIR light source. Our discovery of novel type of nontoxic Fe 3+ -activated broadband NIR luminescence phosphors with efficient NIR persistent luminescence paves the way for discovering Cr 3+ -free multifunctional NIR luminescence materials, thereby expanding their application possibilities.
研究领域:
材料科学
·
光学
·
光电子学
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产品关联
DOI
高影响因子
Advanced Healthcare Materials
·
2025
·
IF 9.6
Yanping Xie,Yunfei Zhu,Ya Wen,Siqi Hu,Ju Jiao,Yue Wu,Lijun Jiang,Bruno Viana,Ka-Leung Wong,Jing Wang,Rui Zou
Epstein–Barr virus (EBV) is a well-recognized oncogenic virus that promotes several lymphoid and epithelial cancers. The Epstein–Barr nuclear antigen 1 (EBNA1), which is known to be expressed in all EBV-positive cancers, plays a vital role in viral genome replication and maintenance and is therefore emerged as an attractive target for clinical intervention. Several EBNA1 inhibitors have shown potency in the growth inhibition of EBV-positive cancers, yet low bioavailability and in vivo unmonitored nature hamper their further implementation. Here a novel EBNA1 nano-inhibitor based on EBNA1-specific peptide inhibitor (P4) functionalized ZnGa 2 O 4 :Cr 3+ ultra-small near-infrared persistent luminescent (NIR-PL) nanoparticles (ZGOC-P4) is developed. Owing to the specific binding to EBNA1, ZGOC-P4 nano-inhibitor can quickly achieve nuclear internalization in EBV-positive nasopharyngeal carcinoma (NPC) cells (C666-1) and selectively inhibit their growth. In sharp contrast, ZGOC-P4 nano-inhibitor shows no inhibition effect on EBV-negative NPC cells (HK-1). Moreover, the results indicate that the well-designed nano-inhibitor enables efficient tumor-targeting accumulation in NPC xenograft model under the monitoring of autofluorescence interference-free NIR-PL imaging in vivo and suppresses EBV-associated tumor growth with an inhibition rate of 61.6%. This work highlights the potency of ZGOC-P4 on NPC treatment and may provide new sight into future research on EBV-associated diseases.
研究领域:
生物医学工程
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肿瘤学
·
病毒学
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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
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信息加密技术
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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
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半导体物理
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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
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生物医学
·
光化学
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产品关联
DOI
PubMed
高影响因子
Journal of Materials Chemistry C
·
2025
·
IF 5.1
Qingqing Xie,Ailijiang Tuerdi,Xiangkai Qiao,Yalin Zheng,Aikelaimu Aihemaiti,Peng Yan,Abdukader Abdukayum
Near-infrared persistent luminescent nanoparticles (PLNPs) are widely used for deep tissue penetration in bio-imaging. Ga2O3:Cr3+, a promising phosphor material, has been extensively studied for its suitable band gap and tunable emission wavelength. Although a redshift in the fluorescence wavelength has been achieved, the persistent luminescence properties of Ga2O3:Cr3+ following this redshift have not been extensively explored. Herein, we have prepared Ga1.99−xInxO3:0.01Cr3+ (x = 0–1.99)(GIO) PLNPs utilizing a hydrothermal method followed by calcination. Replacing gallium with indium in the crystal structure of Ga2O3:Cr3+ redshifts the emission wavelength to 830 nm and induces persistent luminescence, which is attributed to lattice distortion caused by the substitution of gallium with indium, which modifies the crystal field around the Cr3+ ions. The as-prepared GIO nanoparticles show potential for future low-cost, deep-tissue bioimaging applications.
研究领域:
材料科学
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生物医学工程
·
光学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Lei Wang,Ning Zhao,Changrui Zhu,Lei Chen,Yang Jiang,Rulong Zhou,Yanfang Liu,Bingyan Qu,Hubertus T. Hintzen
In the field of solid-state luminescence, Cu 2+ has long been widely acknowledged for its capacity to emit infrared light. However, the occurrence of visible emission from Cu 2+ ions had been infrequently observed and reported. In this study, we made an intriguing discovery by examining the behavior of Cu 2+ within an irregular coordination environment of Ba in BaGa 2 O 4 . When excited by UV light, Cu 2+ unexpectedly gave a vibrant yellow–red emission, covering a wavelength range spanning from 500 to 750 nm. More noteworthy, by simply manipulating the excitation wavelength or adjusting the temperature, the peak wavelength of the emission could be effectively tuned from approximately 600 to 660 nm, which could be attributed to the luminescence nature of the charge transfer (CT) between O 2− and Cu 2+ . Moreover, the phosphor material displayed a remarkable persistent luminescence (PerL) lasting up to 12 h after UV light excitation. Through thermoluminescence (TL) measurements and first-principle calculations, we found that the intrinsic defects, such as vacancies of oxygen and gallium (V O and V Ga ″ ), played important roles for the PerL phenomena. These findings highlighted the exceptional tunability and PerL properties of BaGa 2 O 4 :Cu 2+ . Our study provided a new potential guideline for the design of Cu 2+ -activated phosphors in visible region, and opened up new avenues for the research in related functional luminescence materials.
研究领域:
材料科学
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光学
·
固体物理
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产品关联
DOI
高影响因子
OPTICAL MATERIALS
·
2024
·
IF 3.8
Xiaoxuan Song,Jian Yang,Shuai Wang,Jia Song,Biying Bao,Hancheng Zhu,Duanting Yan,Changshan Xu,Yuxue Liu
Herein, ZMGGO:Cr 3+ nanoparticles were prepared by incorporating Mg 2+ ions into Cr 3+ -doped zinc gallogermenate nanoparticles through a hydrothermal path in combination with a vacuum heating. The average size of ZMGGO:Cr 3+ nanoparticles minishes from 59 to 12 nm with growing Mg 2+ concentration. Meanwhile their luminescence intensity at 696 nm of ZMGGO:Cr 3+ nanoparticles was only decreased by less than half of that of the undoped nanoparticles due to the decreased particle size after Mg doping. Meanwhile, the integral luminescence intensity of their entire emission band shows an increasing trend with increasing temperature due to the enhanced phonon sideband luminescence at high temperature. More important, it is found that the formation energies associated with Mg′ Ga -Ga o Zn and Zn′ Ga -Ga o Zn defects are −1.2 and 1.69 eV, respectively, suggesting the enhanced afterglow intensity of ZMGGO:Cr 3+ can be ascribed to Mg doping leading to the increased number of these anti-site traps. Finally, the dual-level time-gate optical encryption was demonstrated using phosphorescent inks containing ZMGGO:Cr 3+ nanoparticles with different afterglow intensities.
研究领域:
材料科学
·
光学工程
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产品关联
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2024
·
IF 18.5
Pan Ran,Wenxiong Cao,Huan Zheng,Shuang Xie,Guiyuan Zhang,Yuan Liu,Xiaohong Li
Intracellular bacterial (ICB) infection is one of the most life-threatening cases of drug resistance, and photodynamic therapy (PDT) is challenged by limited light penetration into tissues and unspecific toxicity to host cells. Herein, theranostic nanoparticles (NPs) are developed to facilitate on-demand activation of photosensitizers inside ICBs and persistent PDT of deep-tissue ICB infections. Mechanoluminescent SrAl 2 O 4 :Eu 2+ and persistence luminescent CaS:Eu 2+ are sequentially deposited on mesoporous silica to prepare mSC, followed by encapsulation by bacterial membranes with loaded nitroreductase (NTR)-activatable methylene blue (nMB) to obtain mSC-nMB@BM NPs. The fluorescence quenching of nMB with mSC offers few cytotoxicities even under ultrasonication, and bacterial membrane coatings mediate the specific NP internalization into ICB-infected macrophages. Bacterial pore-forming toxins trigger nMB release from NPs, and intrabacterial NTR rejuvenates methylene blue probes from nMB for real-time imaging of ICB infections. Ultrasonication of NPs continuously excites the rejuvenated methylene blue to generate reactive oxidative species and reduce viable ICBs by 3.54 log magnitude folds. NP treatment on ICB-infected mice exhibits full survival and restores viscera functions without any pathological abnormality. Therefore, this concise NP design demonstrates capabilities of bacterial membrane-mediated specific internalization, bacterial toxin-triggered release and intrabacterial NTR-rejuvenation of fluorescent probes, and persistent internal light-illumination for ICB theranostics.
研究领域:
生物医学工程
·
感染病学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Lu Pan,Yafang Wang,Wanting Wang,Mengting Zhao
Near-infrared (NIR) long persistent luminescent materials, with broad potential applications, have attracted significant research interest, though most studies focus on room-temperature performance. However, designing and synthesizing long-persistent luminescent materials that can form a large number of stable shallow traps at lower temperatures is extremely challenging. In this paper, a series of Cr-doped broadband near-infrared silicon germanate long persistent luminescent phosphors were synthesized by the high-temperature solid-phase method. The optical properties and crystal structural parameters of the phosphors at room temperature were studied systematically. The specific luminescence sources and reasons for the broadening of emission peaks have been discussed. The significant differences in persistent luminescence at different temperatures are caused by the substitution of Ge-Si chemical units in the Na₂CaGe x Si 6-x O₁₄ matrix doped with Cr³⁺ ions. Among the samples, Na 2 CaGe 4 Si 2 O 14 :0.4 mol% Cr 3+ shows excellent persistent luminescence properties and abundant shallow traps at low temperature. This phosphor was tested at low temperature to investigate its potential as an indicator for the temperature changes of biologics.
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
Journal of Advanced Ceramics
·
2022
·Vol. 11
·期 6
·974-983
·
IF 11.534
Zhao Jingtao,Lei Lei,Ye Renguang,Zhang Junjie,Zhang Xianghua,Xu Shiqing
Natural sunlight activated persistent luminescence (PeL) is ideal candidate for optical information display in outdoors without the requirement of electric supply. Except the brightness and duration, the stability especially water resistance of the PeL materials is of significant importance for practical application, which remains a great obstacle up to date. Herein, we report a new sunlight activated PeL glass ceramic containing hexagonal Sr 13 Al 22 Si 10 O 66 :Eu 2+ crystals, which exhibits strong blue PeL and can last more than 200 h. The PeL can be charged by the full wavelengths located in AM 1.5G due to the broad distribution of traps in the crystal structure. The PeL is clearly observed by the naked eye even after 24 h upon sunlight irradiation irrespective of the weather, and the photoluminescence intensity only decreased ∼3.3% after storing in water for 365 d. We demonstrate its potential application for thermal and stress responsive display as well as long-term continuous security indication upon sunlight irradiation, which not only save vast energy and reduce environment pollution, but also are appropriate for outdoor usage.
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
CERAMICS INTERNATIONAL
·
2023
·
IF 5.2
Jinxing Zhao,You Zhang,Taian Wang,Li Guan,Guoyi Dong,Zhenyang Liu,Nian Fu,Fenghe Wang,Xu Li
Anti-counterfeiting technology is of great significance to information security. To obtain high-quality anti-counterfeiting materials, the developments of inorganic materials are crucial. In this paper, a series KGaSiO 4 : x Eu 3+ phosphors with persistent luminescence, photoluminescence , and thermochromic have been successfully prepared and the application of quadruple anti-counterfeiting is realized. The X-ray diffraction and Rietveld refinement indicate that the phosphors are pure phase. With Eu 3+ ions doping, the structure change, site occupancies, and color-tunable phenomenon are carefully investigated. Different from another Eu 3+ doping phosphor, the emission of KGaSiO 4 :0.2% Eu 3+ phosphor changes with the excitation light in the region of 240 nm–306 nm. The emission color can be modulated with the surrounding temperature. Surprisingly, this phosphor can emit green afterglow light, which is attributed to the different luminescent properties of the matrix and doping of Eu 3+ ions. The series of phosphors exhibit abundant luminescent properties. Based on their wavelength dependence, concentration quenching, long afterglow, and thermochromic properties, the KGaSiO 4 : x Eu 3+ phosphors can be effective materials for quadruple-modal anti-counterfeiting devices.
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
危险品化学品经营许可证（带存储）