Journal of Materials Chemistry C
·
2024
·
IF 5.7
Wei Zhao,Li Li,Faling Ling,Yongjie Wang,Guotao Xiang,Xianju Zhou,Sha Jiang,Zhiyu Yang,Yongbin Hua,Jae Su Yu
Lead-free double perovskite materials have attracted lots of interest because they can be doped with luminescence activators to modify their optical characteristics and improve photoluminescence performances. Herein, a solvothermal method was utilized to synthesize single Cr3+-doped Cs2NaInCl6 phosphors. Under 292 nm excitation, Cr3+-doped Cs2NaInCl6 microparticles exhibited a strong broad near-infrared emission with a good photoluminescence quantum yield of 42.9%. The prepared sample exhibited a prominent peak at 960 nm and a full width at half maximum of 138 nm, which can be attributed to the spin-allowed transition (4T2 → 4A2) of Cr3+ ions. Additionally, the emission band of Cr3+ displayed a noticeable red shift as temperature increased owing to the variations in the strength of the crystal field. The thermometry based on the bandwidth and band-shift modes showed good sensitivities of 0.337 nm K−1 and 0.272 nm K−1, respectively. Finally, the security ink was made for information encryption.
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高影响因子
Nanoscale
·
2017
·Vol. 9
·期 20
·6846-6853
·
IF 7.367
Zhihao Zhou,Wei Zheng,Jintao Kong,Yan Liu,Ping Huang,Shanyong Zhou,Zhuo Chen,Jianlin Shi,Xueyuan Chen
Persistent luminescence nanoparticles (PLNPs) have shown great promise in the field of biomedicine, but are currently limited by the challenge in the synthesis of high-quality PLNPs with bright persistent luminescence and a long afterglow time. Herein, we report a facile strategy for the synthesis of monodisperse, rechargeable and LED-activated ZnGa2O4 : Cr3+ near-infrared (NIR) PLNPs based on a modified solvothermal liquid–solid-solution method. The as-synthesized PLNPs are not only flexible for bioconjugation, but could also circumvent the limitation of the weak persistent luminescence and short afterglow time that most PLNPs confronted owing to their rechargeable capability. It was unraveled that both thermal activation and quantum tunneling mechanisms contributed to the afterglow decay of the PLNPs, and the quantum tunneling was found to dictate the LED-activated afterglow intensity and lasting time. Furthermore, by utilizing the superior excitation-free persistent luminescence, we demonstrated for the first time the application of biotinylated ZnGa2O4 : Cr3+ PLNPs as background-free luminescent nano-bioprobes for sensitive and specific detection of avidin in a heterogeneous assay with a limit of detection down to ∼150 pM, thus revealing the great potential of these NIR PLNPs in ultrasensitive biodetection and bioimaging.
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PubMed
高影响因子
Current Analytical Chemistry
·
2025
·Vol. 21
·期 1
·57-67
·
IF 1.7
Mengfei Yang,Jing Shi,Taiming Luo,Xiaozhan Yang
Aims By using terephthalic acid, 2, 5-furandicarboxylic acid, and terbium nitrate hexahydrate, a Tb-MOF with a core-shell structure was successfully designed and prepared. Methods A one-pot method was employed to design and synthesize core-shell Tb-MOF. The morphology, luminescence performance, and stability were well characterized. Results Tb-MOF demonstrated good water stability, acid and alkali resistance, and thermal stability. Tb-MOF was found to have high sensitivity to detect Cr3+, Bi3+, and acetone in an aqueous solution, and the LOD of Cr3+, Bi3+, and acetone were calculated to be 0.18 μM, 4.22 μM, and 0.26%, respectively. The sensing mechanism of Cr3+ and acetone was explained as energy-competitive absorption, and the sensing mechanism of Bi3+ was explained as ion replacement. Conclusion The prepared Tb-MOF can be developed as a multifunctional light-emitting sensor with high selectivity.
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高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2014
·
IF 3.84
Haiyang Liu,Xuejuan Wan,Tianqi Liu,Yuanqing Li,Youwei Yao
Cascade recognition of trivalent chromium cation (Cr 3+ ) and fluoride anion (F − ) via rhodamine-urea methacrylate-based fluorescent probe (RhBUA) and its subsequent cationic complex was reported. The non-fluorescent rhodamine derivatives can selectively detect Cr 3+ cation over some other metal ions in CH 3 CN–H 2 O (90/10, v/v, pH 7.0) solutions with a 1:1 stoichiometry, leading to prominent fluorescence OFF–ON switching. The obtained RhBUA–Cr 3+ complex can subsequently serve as a sensitive and selective chemosensor for F − ion. Complete signal quenching (fluorescence ON–OFF switching) can also be observed, ascribing to the extraction of Cr 3+ cation and the resulting deformation of RhBUA–Cr 3+ complex.
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高影响因子
CERAMICS INTERNATIONAL
·
2023
·
IF 5.2
Chaoyue Peng,Lifang Yuan,Geng Chen,Haoyi Wu,Yahong Jin
The advance of portable and smart near-infrared (NIR) light sources has sparked significant interest. However, achieving high-performance NIR emission at longer wavelengths remains a formidable challenge. In this study, we prepared broadband NIR phosphors by codoping pyrochlore oxide Y 2 GaSbO 7 (YGSO) with Cr 3+ and Yb 3+ ions using a conventional high-temperature solid-state reaction. Upon excitation by blue light, YGSO: 0.03Cr 3+ exhibited a broadband NIR emission centered at 765 nm with a full width at half maximum (FWHM) of 160 nm. The purposeful incorporation of Yb 3+ ions facilitated efficient energy transfer from Cr 3+ to Yb 3+ , resulting in a newly observed NIR emission peak at 970 nm. Notably, the addition of Yb 3+ improved the overall thermal quenching resistance owing to its inherent thermal stability. Furthermore, we encapsulated the as-obtained phosphors with commercial blue LED chips to create prototype phosphor-converted light-emitting diodes (pc-LEDs). The Cr 3+ and Cr 3+ -Yb 3+ codoped pc-LEDs achieved output powers of 120 mW@660 mA with a photoelectric conversion efficiency of 12.66%@30 mA, and 131.7 mW@1020 mA with a photoelectric conversion efficiency of 13.93%@30 mA, respectively. These broadband NIR pc-LEDs hold promise for optical imaging applications.
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高影响因子
CHEMISTRY OF MATERIALS
·
2022
·
IF 10.508
Chaojie Li,Jiyou Zhong
Broadband near-infrared (NIR) light source based on phosphor-converted light-emitting-diode (pc-LED) is crucial for applications in medical diagnosis, food quality analysis, and night vision fields, motivating the development of highly efficient and thermal robust NIR phosphor materials. Herein, a novel Cr3+-doped garnet phosphor Y3In2Ga3O12:Cr3+ emerges from a fundamental study of the Ln3In2Ga3O12 (Ln = La, Gd, Y, and Lu) family. Upon 450 nm excitation, this material presents a broadband NIR emission covering 650–1100 nm with a peak located at 760 nm and a full width at half maximum of 125 nm. This material also possesses an ultrahigh internal quantum efficiency (IQE = 91.6%) and absorption efficiency (AE = 46.6%), resulting in an external quantum efficiency as high as 42.7%. Moreover, the emission intensity of this material at 150 °C maintains 100% of the initial intensity, showing a rare zero-thermal-quenching property. Fabricating an NIR pc-LED device by using this material, an excellent NIR output power of 68.4 mW with a photoelectric efficiency of 15.9% under 150 mA driving current can be obtained, which exhibits much better performance than the devices fabricated by using some reported efficient NIR materials. Therefore, this work not only provides an ultraefficient and thermally robust broadband NIR material for spectroscopy application but also contributes to the foundation of design rules of NIR materials with high performance.
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Laser & Photonics Reviews
·
2024
·
IF 9.8
Hui Zhu,Yanan Li,Yuexiang Xi,Chunli Xin,Cheng Zhou,Zhe Yang,Lang Ruan,Yanyue Li,Yao Peng,Maxim S. Molokeev,Andrey Zolotov,Jing Wang,Zhi Zhou,Mao Xia
β-Al 2 O 3 phosphors show good optical properties for highly symmetric lattices and dense frameworks. Here, an abnormal lattice shrinkage phenomenon is found in BaMg 1-x Zn x Al 9.8 O 17 : Cr 3+ (BM 1-x Z x A: Cr 3+ ) phosphors, which can be attributed to the variation in the covalency of the chemical bond. Accordingly, the denser crystal structure caused by the abnormal shrinkage improves the luminescent intensity (67%↑) and the thermal stability (69%→76%@150 °C). Internal/external quantum efficiency (IQE/EQE) of BZA: 0.2Cr 3+ reaches 95% and 52.7%, respectively. In addition, the preferential occupation of the Cr 3+ ion is discussed through the crystal field strength calculation, low-temperature spectra, and fluorescent lifetime. The unique spectrum of the phosphor derives from the occupation of Cr 3+ on the octahedral sites (Al4 and Al1) and the formation of Cr 3+ -Cr 3+ coupling pairs. Finally, the high matching rate between the absorption curve of plant pigment P fr and the EL spectrum of the as-prepared pc-LED expresses that it can be applied in plant lighting.
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高影响因子
Inorganic Chemistry Frontiers
·
2022
·Vol. 9
·期 18
·4602-4607
·
IF 7.779
Meng Zhao,Shengqiang Liu,Hao Cai,Fangyi Zhao,Zhen Song,Quanlin Liu
Near-infrared (NIR) light devices have great potential in non-destructive testing and biomedicine fields. However, the lack of stable and efficient long wavelength NIR phosphors hinders their development. In this work, utilizing the compositional flexibility of antimonate double perovskites, we realized efficient and tunable broadband NIR emissions based on A2MSbO6:Cr3+ materials (A = Ca, Sr, and Ba; M = Ga, In, Sc, and Y). The NIR emission peaks ranged from 825 to 1010 nm by a composition modulation. In particular, Ca2ScSbO6:Cr3+ exhibits an 850 nm-centering broadband NIR emission with an internal quantum efficiency of 84.5% and a high thermal quenching temperature, retaining ∼71% at 410 K of the initial intensity at 80 K. Comparatively, Sr2InSbO6:Cr3+ with a 920 nm-centering broadband emission has 63.2% internal quantum efficiency. This work could help in discovering novel NIR phosphors with long-wavelength emissions and high efficiency.
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高影响因子
INORGANIC CHEMISTRY
·
2024
·
IF 4.3
Ying Chen,Rongfei Wei,Lanjiao Li,Xiangling Tian,Fangfang Hu,Hai Guo
High-performance near-infrared (NIR) light sources are highly sought after in advanced spectroscopy techniques, driving the development of NIR phosphor-converted light-emitting diodes (pc-LEDs). Escalating the luminescence intensity and thermal stability of NIR-emitting phosphors, which is a core component of NIR pc-LEDs, is of paramount importance. Herein, chemical unit cosubstitution and cosolvent addition tactics were implemented to simultaneously boost the NIR luminescence performance of the synthesized phosphors. The replacement of [Sc3+-Sc3+] for [Ca2+-Zr4+] in Ca4ZrGe3O12:Cr3+ likely reduces the antisite defects and offers a more rigid crystal structure. As a result, the emitting intensity is reinforced significantly, along with a remarkable improvement in thermal stability, acquiring 65% of the initial luminescence at 423 K compared with 42% for the primal sample. Moreover, the introduction of H3BO3 further enhances NIR luminescence while maintaining a favorable thermal resistance. The encapsulated NIR pc-LED carries an impressive output power of 71.8 mW at 300 mA and a conversion efficiency up to 15.6% at 10 mA. The practical presentations in food checking, imaging, and detection manifest that Ca3.5ScZr0.5Ge3O12:Cr3+,H3BO3 is a promising material for spectroscopy-based technologies.
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高影响因子
Journal of Materials Chemistry C
·
2024
·Vol. 12
·期 6
·2184-2193
·
IF 5.7
Qingyang Ding,Jincheng Wu,Dechao Yu,Xinxin Han,Yayun Zhou,Tiantian Shen,Yunfeng Ma,Songlin Zhuang,Dawei Zhang
Broadband short-wave infrared (IR) phosphor-converted light-emitting diodes (pc-LEDs) are deemed as excellent light sources for miniature near-IR (NIR) spectroscopy but suffer from a lack of efficient phosphors with emission peaks >850 nm. Novel solid solution Mg4NbxTa2−xO9: 3%Cr3+ phosphors were developed for efficient Cr3+: 4T2(4F) → 4A2 transition at 920 nm with a large full-width at half-maximum of ∼164 nm. Benefiting from the synergistic effects of particle growth, higher crystallinity, and Li+ compensation, the NIR emission intensity of Cr3+ continuously increased with increasing Nb component and even reached twice the value for optimized Mg4Nb2O9: 3%Cr3+,Li+. The optimized sample featured a substantial internal quantum efficiency (QE) of ∼67.1% and an external QE of ∼26.1%. By combing a blue LED chip of ∼465 nm with the optimized phosphor, a self-built pc-LED was tested to exhibit relatively advanced performance, i.e., NIR output powers of 5.1 mW at 20 mA and 62.4 mW at 320 mA as well as a photoelectric efficiency of 10.3% at 20 mA. The broadband NIR pc-LED was successfully applied to clearly image objects behind a plastic cover and to recognize blood vessel distribution inside a human finger and fist. Further development of such Cr3+-activated phosphors (pc-LEDs) will greatly advance the technology of nondestructive safety detection and biomedical imaging, among others.
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高影响因子
DALTON TRANSACTIONS
·
2024
·Vol. 53
·期 12
·5553-5561
·
IF 3.5
Long Chen,Jiyou Zhong,Jiajun Wu,Weiren Zhao
Near-infrared phosphor-converted light-emitting diodes (NIR pc-LEDs) are considered as next-generation of NIR light sources for spectroscopy. However, it is still a challenge to develop an inexpensive broadband NIR phosphor with relatively long-wavelength (λem > 800 nm) emission. In this work, an octahedral Al3+-containing pyrophosphate Al0.5Ta0.5P2O7 with a cubic structure was chosen as a host for Cr3+. Synthesizing this material indicates that this phosphor exhibits a broadband NIR emission peaking at 850 nm with a full width at half maximum (FWHM) of 155 nm under 465 nm excitation. The crystal structure, morphology, local structure, and photoluminescence properties of this material were investigated in detail. The results revealed a full understanding of this new material. A NIR pc-LED device fabricated by using this material combined with a 450 nm LED chip generates a NIR output power of 10.7 mW and a NIR photoelectric conversion efficiency of 3.4% under a 100 mA driving current, which shows the possibility of this material to be utilized in NIR pc-LED applications. Moreover, this material exhibits a linear relationship between emission intensity, decay time and temperature in a wide temperature range, implying that excellent multi-model temperature sensing applications can be expected.
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高影响因子
DALTON TRANSACTIONS
·
2022
·Vol. 51
·期 6
·2313-2322
·
IF 4.569
Shuaishuai Yu,Zhiting Wei,Junxiao Wu,Tianli Wang,Jia Zhang,Xingliang Luo,Yanyan Li,Chuang Wang,Lei Zhao
Nowadays, near-infrared (NIR)-emitting luminescence materials with broad application prospects have drawn great attention. SrGa12O19:Cr3+ is a new type of solid light source material that emits NIR light with wide application prospects. However, the narrow full width at half maximum (FWHM) restricts its further multifunctional applications. Therefore, we propose a novel methodology to increase the FWHM by artificially adjusting the strength of the crystal field by doping Sc3+ ions. By employing Rietveld refinement results, parameters evolution and Raman spectra, Sc3+ ions are proved to successfully occupy the Ga3+ crystallographic sites. Combining the spectroscopy characteristics, it was confirmed that the FWHM was increased from 78 nm (127 977 cm−1) to 104 nm (96 739 cm−1) with the optimum quantum efficiency of 96.55%. In addition, the excellent thermal stability and unprecedented suitability to a 450 nm blue-chip indicate that it is a potential luminescent material candidate for fluorescence conversion NIR light-emitting diode (LED). Finally, the successful implementation of the night vision on vegetation, biological imaging of human tissue and food inspection for different pork portions illustrate the strong commonality of the method.
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