Science China-Chemistry
·
2023
·Vol. 66
·期 5
·1400-1405
·
IF 9.6
Ye Ming-Yu,Zhang Ming-Xuan,Xu Qiao-Fei,Xu Han,Long La-Sheng,Zheng Lan-Sun
Lanthanide luminescent materials with high quantum yield and thermal stability are of key importance for their practical application. Here we report crystal structures and luminescent properties of [Eu(pfbz) 2 (phen)Cl] ( 1 ) and [Tb(pfbz) 2 (phen)Cl] ( 2 ) (pfbz = Pentafluorobenzoate). Single-crystal analysis reveals that both 1 and 2 crystallize in a polar space group of Cmc 2 1 . Investigation on their luminescent properties indicates that the solid-state quantum yields of 1 and 2 are 97.7% and 90.7%, respectively, while their efficiency of the sensitization process is as high as 100%, revealing that polar structures are more favorable to obtain high quantum yields. Thermogravimetric analysis reveals that both 1 and 2 can be stable up to 240 °C. More importantly, temperature-dependent luminescent spectra of 1 indicate its luminescent intensity at 612 nm only decreased by 5% from room temperature to 373 K, whereas at 373 K, its luminescent intensity remains almost constant for 36 h. Considering that 1 represents the highest quantum yield among known Eu-coordination polymers and its performance as the LED material is better than that of commercially widely used luminescent materials of (Sr,Ca)AlSiN 3 :Eu (630 nm) and (Sr,Ca)AlSiN 3 :Eu (640 nm), the present work provides an excellent substitute for commercial LED materials.
研究领域:
无机化学
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材料科学
·
发光
·
配位聚合物
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固态照明
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DOI
高影响因子
Laser & Photonics Reviews
·
2021
·Vol. 15
·期 10
·2100278
·
IF 13.138
Qionghua Mo,Chen Chen,Wensi Cai,Shuangyi Zhao,Dongdong Yan,Zhigang Zang
The photoluminescence quantum yield (PLQY) of CsPbBr 3 perovskite nanocrystals (NCs) prepared by the hot-injection method can exceed 90%, which have attracted intensive attention for white light-emitting diodes (WLEDs). However, the whole hot-injection experiment requires air isolation and relatively high temperature. In addition, the poor stability of CsPbBr 3 NCs impedes their applications. Here, a facile method is reported to synthesize CsPbBr 3 @ZrO 2 NCs at room temperature in air. Owing to using ZrO 2 coated CsPbBr 3 NCs, the prepared CsPbBr 3 @ZrO 2 NCs not only present a PLQY of 80% but also exhibit an enhanced stability to heat and moisture. Furthermore, WLEDs are fabricated with CsPbBr 3 @ZrO 2 NCs and commercial red phosphors (CaAlSiN 3 :Eu 2+ ) on blue LEDs chips. The fabricated WLEDs exhibit a correlated color temperature (CCT) of 4743 K and luminous efficacy as high as 64.0 Lm W –1 . In addition, visible light communication with a high data rate of 33.5 Mbps is achieved using the WLEDs. This work provides a room temperature strategy to coat zirconia for CsPbBr 3 @ZrO 2 NCs, benefiting to enhance the optical performance and stability, as well as the promotion of the great potentials in solid-state illuminating and visible light communication applications.
研究领域:
材料科学
·
光学工程
·
纳米技术
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DOI
高影响因子
ACS Applied Materials & Interfaces
·
2018
·
IF 8.097
Hechun Lin,Pei Tian,Chunhua Luo,Hai Wang,Jungang Zhang,Jianping Yang,Hui Peng
Luminescent nanofluids are successfully prepared by directly dispersing organometal halide perovskite nanocrystals (OHP NCs) with different emission colors in silicone oils. The photoluminescence quantum yields of nanofluids with green, blue and red emission are 47, 32, and 19%, respectively. Furthermore, the nanofluids greatly enhance the stability of OHP NCs and show excellent resistance against moisture, heat and ultraviolet light. The luminescent nanofluids can be used as liquid color converter for LED. By loading them onto silica aerogel, luminescent perovskite powders were achieved. Their applications as phosphor additives for preparing luminescent PMMA composites were demonstrated.
研究领域:
材料科学
·
光学工程
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DOI
PubMed
高影响因子
Laser & Photonics Reviews
·
2025
·Vol. 19
·期 12
·2500026
·
IF 10
Yeping Ge,Ming Zhao,Yifei Zhao,Xinping Zhang
Filling the cyan gap (470–500 nm) in white light-emitting diodes (WLEDs) is crucial for full-spectrum illumination. However, the traditional approach of adding cyan phosphor to red, green, and blue phosphors can lead to reabsorption and color aberrations due to spectral overlap and varying degradation rates among the mixed phosphors. Herein, a blue-cyan-emitting phosphor (λ em = 475 nm) is developed through Si 4+ -P 5+ heterovalent substitution in blue-violet-emitting Rb 3 Y(PO 4 ) 2 :Eu 2+ phosphor (λ em = 425 nm), which can serve as the blue component in WLEDs to fill the cyan gap without adding extra phosphor. Initially, Eu 2+ primarily occupy the Rb2O 12 sites (426 nm) in Rb 3 Y(PO 4 ) 2 :Eu 2+ , with minimal occupation in the Rb1O 7 sites (456 nm) and YO 6 sites (522 nm). The Si 4+ -P 5+ substitution results in a red-shift of the Eu 2+ @Rb1 emission peak from 456 to 475 nm and the preferred occupation of the Rb1 sites by Eu 2+ , synergistically achieving the blue-cyan luminescence. Employing the blue-cyan-emitting phosphor instead of the blue-violet-emitting phosphor in WLEDs significantly improves the color rendering index from 90 to 97.2, thus enhancing the overall color reproduction quality. This research demonstrates a facile composition modification method to modulate the properties of inorganic luminescent materials and provides an alternative solution for full-spectrum healthy lighting.
研究领域:
材料科学
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发光材料
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固态照明
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无机化学
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光电子学
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Shuhua Tu,Min Chen,Limin Wu
Although perovskite quantum dots (PQDs) have fascinating optical performances and wide uses in light-emitting diodes (LEDs), laser and photodetectors etc., their commercialization and practical applications are seriously hampered by the poor stability against moisture or water, heat, photo-oxidation and ion exchange. Herein, we report a dually encapsulating strategy of PQDs in fluorinated silica (FSiO 2 ) and porous polydimethylsiloxane (PPDMS) foam. Owning to the superhydrophobic and thermal insulation layers, the dually-encapsulated CsPbBr 3 QDs are very stable in the moisture, heat, and irradiation environment and can be long-term stored in air environment for at least 3 months without losing their optical properties. Moreover, the FSiO 2 -coated CsPbBr 3 QDs can be easily released out from PPDMS foam and applied in white LEDs to display pure white emission with ideal CIE (Commission Internationale de L’Eclairage 1931) chromaticity coordinate of (0.33, 0.33). This novel dual-encapsulation strategy through combination of solid airtight shells and thermally insulated porous materials provides a new idea and solution to improve the stability of perovskite quantum dots.
研究领域:
材料科学
·
光学工程
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DOI
高影响因子
Light-Science & Applications
·
2026
·Vol. 15
·期 1
·229
·
IF 24
Yu Dechao,Liu Haisheng,Lv Mengting,Li Benchun,Zhou Yayun,Han Xinxin,Zhang Dawei
New generation of Cr 3+ -free eco-friendly phosphors (no risk of Cr 3+ → Cr 6+ oxidization toxicity) are highly sought to develop broadband NIR light sources. As an essential element for body health, Fe 3+ ion would be an exceptional alternative in strong octahedral crystal field. Here, the Fe 3+ activators were utilized in orthoborate-pyroborate A 2 Sc 2 B 4 O 11 for creating novel NIR-emitting phosphors. A broad absorption over 240–450 nm due to O 2- → Fe 3+ charge transfer transition was recorded for Sr 2 Sc 2 B 4 O 11 :Fe 3+ (SSBO:Fe 3+ ) at 370 nm and Ba 2 Sc 2 B 4 O 11 :Fe 3+ (BSBO:Fe 3+ ) at 355 nm. Resultant NIR emissions with large full width at half maximum about 170 nm were obtained for SSBO:Fe 3+ peaked at 975 nm and BSBO:Fe 3+ at 930 nm. The unique excitation of Fe 3+ doping towards near-ultraviolet (near-UV) region was initially achieved for potential advantage of coupling a mainstream UV chip. Codoping of Yb 3+ into A 2 Sc 2 B 4 O 11 :Fe 3+ made emission peak red-shift towards 1000 nm and ~ 160-fold enhancement in the integral intensity owing to a robust energy extraction from the major dark (nonluminous) Fe 3+ . The optimized SSBO:0.02Fe 3+ ,0.15Yb 3+ exhibited considerable internal and external quantum efficiency ~ 78% and 48%, respectively. Compared to the luminescence thermal stability of ASBO:Fe 3+ (32%@373 K, i.e., sustaining 32% of its room-temperature emission intensity at 373 K), the Yb 3+ codoping endowed much superior stability > 63%@373 K, and additional temperature sensing with relative sensitivity ~ 1.5% K −1 at 423 K. Ultimately, by coating the novel phosphors onto UV ~ 365 nm chips, the home-made pc-LEDs were applied in night vision, food inspection, biomedical imaging, and spectroscopy analysis.
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DOI
PubMed
高影响因子
FOOD CHEMISTRY
·
2026
·
IF 10.4
Tingting Yan,Shuping Gao,Jiaxin Yang,Zexi Gao,Weixuan Zhang,Hailing Gan,Zhiguo Li,Wenzhi Tang,Zhonghong Li
Wavelength-selection-free detection (412–715 nm) without prior spectral knowledge. • Automatic recognition enables sample-in-answer-out detection without calibration. • Miniaturized instrumentation (~200 g) achieved via RGB sensor and LED integration. • Cost reduction (thousands → ~$10) with 92.32–107.03% accuracy vs. lab instruments. • HSV-RGB algorithm enables user-friendly, decentralized detection in remote areas. Colorimetric analysis is widely used in food safety but limited in field deployment by bulky instruments and manual wavelength calibration. Herein, we present a portable, low-cost colorimetric device enabled by a bioinspired HSV-RGB fusion algorithm that autonomously identifies analytes and quantifies concentrations without user-defined parameters. Hue ( H ) served as a spectral fingerprint, and RGB values followed the Lambert-Beer law, which was validated across six wavelengths (412, 426, 486, 500, 630, and 715 nm). The device showed high linearity (R 2 > 0.99) with LODs of 6.25 ppb (pesticide), 0.027 mg mL −1 (glucose), and 0.03 μg mL −1 (phosphate), calculated via 3σ/slope, achieving sensitivity comparable to spectrophotometry. In real food samples, measured concentrations agreed with those from the reference spectrophotometric method within 92.32% to 107.03%, confirming its accuracy. Weighing ~200 g and costing ~$10, it enables sample-to-result detection and offers a field-deployable solution for on-site food safety monitoring, particularly in resource-limited settings.
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DOI
PubMed
高影响因子
DALTON TRANSACTIONS
·
2023
·
IF 4
Bowen Wang,Changshuai Gong,Xuyan Xue,Meiting Li,Qi Zhu,Xuejiao Wang,Ji-Guang Li
A series of CaGdAlO4-type layered perovskite phosphors showing deep red luminescence (λem = 711 nm, λex = 338 nm) were synthesized via a solid-state reaction. A comprehensive analysis performed via photoluminescence, X-ray photoelectron spectroscopy, thermoluminescence, and fluorescence decay revealed that the deep red luminescence is related to oxygen defects and particularly oxygen interstitials. The defect-related luminescence was effectively regulated through partial substitution of multi-cationic sites (the Ca2+ site with Mg2+, Sr2+, and Ba2+; the Gd3+ site with La3+, Y3+, and Lu3+) and full substitution of Gd3+ with Y3+. Remarkably, a 383.3% stronger luminescence was obtained through partial substitution with Lu3+, and the quantum yield of luminescence reached 28.74%, which is higher than those values of most previously reported self-luminescent systems. A pc-LED device was fabricated using this phosphor, and the device was shown to have potential application in indoor plant cultivation.
研究领域:
材料科学
·
光学工程
·
农业科学
✓ 已验证
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2026
·
IF 5.1
Xinyi Yu,Yinglu Liu,Jinze Li,Zhengtao Xu,Zhihao Zhang,Yuan Pu,Dan Wang
Uniform TiO 2 nanoparticles with low polydispersity index of 0.121. • Highly dispersed TiO 2 nanoparticles in epoxy resin with high refractive index. • Enhanced luminous flux of AlGaInP LED by 30.66% using nanocomposites encapsulant. Physical blending of high-refractive-index titanium dioxide (TiO 2 ) nanoparticles into optical resins offers a novel and efficient approach to prepare high-transparency and high-refractive-index optical materials, which are promising for light-emitting diode (LED) packing and advanced displays. Efficient synthesis and uniform dispersion of inorganic nanoparticles are crucial for their commercialization. In this work, methoxy triethyleneoxypropyl trimethoxysilane (MTE-TMS) modified TiO 2 nanoparticles with excellent dispersibility were synthesized using a high-gravity-assisted rotating packed bed (RPB) reactor. The as-prepared nanoparticles possess an extremely low polydispersity index (PDI) of 0.121 and are homogeneously dispersed in alicyclic epoxy resin, namely 3,4-epoxycyclohexylmethyl-3′,4′-epoxycyclohexane carboxylate (EEC). The resultant nanocomposite films exhibit tunable refractive indices ranging from 1.49 to 1.74, while the intrinsic refractive index of MTE-TMS-modified TiO 2 (named as M-TiO 2 ) nanoparticles is determined to reach up to 2.416. The intense mixing of RPB improves the grafting content of surface modifiers and reaction efficiency, thus achieving uniform coating on nanoparticle surfaces. With 50 wt% M-TiO 2 incorporated, the 200 μm-thick film retains transmittance over 85% in the visible region, accompanied by a haze of 0.45% and a refractive index of 1.74. The nanocomposites also possess better hardness, water resistance and thermal conductivity than pure EEC resin. When used for packaging AlGaInP-based (refractive index ≈3.0) LEDs, the materials boost the luminous flux of devices by 30.66%, showing bright prospects in high-refractive-index chip packaging.
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产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2018
·
IF 8.097
Yuan Zhan,Lifeng Lin,Min Chen,Limin Wu
Dual-state emission (DSE) fluorophores with strong photoluminescence in both solution and solid states have wide applications in fluorescent probes and photoelectric devices. However, most of the existing DSE fluorophores involve complex synthetic strategies or only one or two emission colors in the solid state, which may hinder their practical applications. Herein, we report a facile and effective strategy to fabricate a kind of novel adjustable DSE fluorophore TPAA–Cu based on the small molecule terephthalic acid (TPA) and ascorbic acid (AA) with CuCl2 as the catalyst. Not only can the TPAA–Cu solution emit blue, blue-green, and yellow colors depending upon the pH of solution, but also it shows reversible pH-tunable fluorescence colors. More importantly, corresponding TPAA–Cu solid fluorophores with blue, blue-green, and yellow colors can also be obtained with the quantum yields of 16.3, 26.7, and 29.6%, respectively.
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY
·
2021
·Vol. 36
·期 12
·2735-2743
·
IF 4.023
Mengtian Li,Yi Luo,Zhirong Zou,Fujian Xu,Xiaoming Jiang,Xiandeng Hou
An ultraviolet light emitting diode (UV-LED) array chip as the irradiation source for nano-TiO2 catalyzed photochemical vapor generation (PCVG) was combined with a hollow electrode point discharge microplasma optical emission spectrometer (HEPD-OES) to realize instrumental miniaturization, and utilized for quantitative analysis of trace selenium (Se). Under the irradiation of the UV-LED array chip, Se(IV) and Se(VI) could be effectively converted into volatile species in a miniature quartz coil coating with nano-TiO2 on its inner wall as a photocatalyst. Meanwhile, volatile analyte species were totally guided into the hollow electrode and transported into the inside of micro-discharge plasma for excitation and enhanced sensitivity. Experimental conditions of PCVG and HEPD-OES were investigated in detail using an analytical line of Se at 203.98 nm through the peak area integrated for quantitation. Under optimized experimental conditions of 0.6 mL sample volume, 10% (v/v) acetic acid, 370 nm and 50 W LED, and 75 s UV irradiation, Se(IV) and Se(VI) could be detected with the same LODs, 3.9 μg L−1 and 4.1 μg L−1, respectively. The accuracy of the proposed method was validated by the analysis of the Certified Reference Materials (CRMs, GBW(E)080395 and BWB2427-2016) and real water samples. With the advantages of high compatibility, high efficiency, small size and low power consumption, the integration of UV-LED array chip based PCVG and HEPD-OES would be beneficial to fabricate miniaturized and portable devices for field analysis.
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高影响因子
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
·
2025
·
IF 6.2
Wenying Sun,Jing Liu,Xu Shi,Yanju Bi,Huanyi Liu,Tong Xu
Pesticides and plastics have brought convenience to agricultural production and daily life, but they have also led to environmental pollution through residual chemicals. Emamectin benzoate (EMB) is among the most widely used insecticides, which can cause environmental pollution and harm the health of organisms. Additionally, microplastics (MPs), a relatively new type of pollutant, not only are increasing in residual amounts within water bodies and aquatic organisms but also exacerbate pollution by adsorbing other pollutants, leading to a mixed pollution scenario. Nevertheless, the toxicity and mechanism of EMB and MPs on common carp skeletal muscle have not been elucidated. Therefore, we established exposure models for EMB and MPs, and methods such as hematoxylin and eosin staining, immunofluorescence staining, JC-1 staining, and western blotting were employed to investigate the underlying mechanisms of skeletal muscle damage. The results of in vivo and in vitro experiments indicated that exposure to EMB or MPs led to oxidative stress, which in turn caused mitochondrial fusion/fission imbalance (with decreased Mfn1, Mfn2, and OPA1 and increased DRP1), reduced mitochondrial membrane potential, decreased ATP content, reduced protein synthesis, and increased degradation, ultimately resulting in skeletal muscle atrophy. Joint exposure caused more severe damage than single exposure, and the addition of NAC can effectively alleviate skeletal muscle atrophy. In summary, exposure to EMB and/or MPs induced excessive reactive oxygen species (ROS) production, giving rise to mitochondrial dysfunction and an imbalance in skeletal muscle protein synthesis and degradation, ultimately resulting in skeletal muscle atrophy in common carp.
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高影响因子
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