ChemistrySelect
·
2024
·Vol. 9
·期 32
·e202402449
·
IF 1.9
Xiaoyan Wang,Zhuijun Xu,Said Amzil,Ya-Jun Cheng,Long Lin,Qing Ji,Suzhe Liang,Jin Zhu,Jingkuan Duan,Tianle Zheng,Yonggao Xia
Graphical Incorporation of in-situ Sn 4+ doping and nano-macro structure within TNO anode materials using facile one-step co-precipitation method achieves high Li + diffusion coefficient and excellent high-rate reversible capacities. Titanium niobium oxide (TNO) exhibits great potential as a lithium-ion battery anode due to its high capacity, minimal volume change during cycling, and safe good operation characteristic enabled from its voltage profile. However, its intrinsically low electronic and ionic conductivity hinders its potential for practical applications. This work proposes a facile coprecipitation method to address these limitations by incorporating a nano-macro structure and in situ Sn ion doping into bulk TNO. This approach ensures homogeneous integration of TNO precursors and the Sn dopant at a molecular level within the co-precipitation nanoparticles. Additionally, the use of low toxicity solvents facilitate scalability of the synthesis process. Excellent rate capability, high reversible capacities, and good capacity retention are achieved simultaneously due to synergistic effects of the bulk doping, which expands the crystal volume and enhances Li + diffusion, combined with abundant surface area of the nano-macro structures. The specific capacity of Sn-doped TNO nanospheres remains at 180 mAh/g at a high current density of 40 C (1 C=400 mA g −1 ), which is nearly four times higher than that of undoped samples. Furthermore, the cyclic voltammetry analysis at various scanning rates reveals an increased Li + diffusion rate in Sn doped titanium niobium dioxide.
研究领域:
材料科学
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能源存储技术
·
化学工程
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产品关联
DOI
高影响因子
JOURNAL OF LUMINESCENCE
·
2023
·
IF 3.6
Liwei Zeng,Jiyou Zhong,Wenbin Lin,Weiren Zhao
NIR phosphor-converted light-emitting diode (NIR pc-LED) has attracted many attentions for its promising applications in biomedical imaging, night vision, spectroscopy, and many other fields, while the discovery of broadband NIR phosphors with high external quantum efficiency (EQE) remains a challenge. Herein, a series of efficient and tunable broadband NIR-emitting Ga 1.97-2 x Mg x Sn x O 3 :0.03Cr 3+ phosphors were synthesized via [Mg 2+ -Sn 4+ ] substituting [Ga 3+ -Ga 3+ ] in Ga 2 O 3 :Cr 3+ system. As increase of substituting ratio x , a significant red-shift in the emission spectra from 726 to 793 nm with a full width at half maximum (FWHM) extended from 121 to 167 nm can be observed. All the samples have an EQE above 40% under 450 nm excitation; and the excitation peak in the blue light region remains unchanged, enabling these materials to be efficiently excited by blue LEDs. Finally, a NIR pc-LED device was fabricated by integrating the optimized Ga 1.77 Mg 0·1 Sn 0·1 O 3 :0.03Cr 3+ phosphor on a blue LED chip, which exhibits a high NIR output power of 33.41 mW with a photoelectric conversion efficiency of 12.01% under a drive current of 100 mA. These results indicate that the obtained NIR phosphors may have potential in NIR pc-LEDs applications.
研究领域:
材料科学
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光学材料
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固态照明
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光子学
·
发光材料
✓ 已验证
DOI
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2018
·
IF 3.794
Biao Lu,Yingbang Yao,Xiaodong Jian,Tao Tao,Bo Liang,Q.M. Zhang,Sheng-Guo Lu
The electrocaloric effect (ECE) in gadolinium and tin ions doped lead lanthanum zirconate titanate ceramics was investigated. Five samples with different compositions and hence different relaxor behaviors and polarization properties were prepared via a conventional solid-state reaction process. The ECE was measured directly by a high resolution thermometer from 293 K to 423 K. The results show that the ECE is mainly determined by the number of polarization states and polar-correlation strength . Furthermore, the results reveal that the temperature variation of ECE around Curie temperature is associated with the generation rate, activation energy , size and freezing temperature of polar nanoregions. As a result, Sn doped PLZT composition exhibits the best ECE, i.e. , a peak ΔT > 2 K obtained at 5 MV/m, and ΔT > 1.78 K achieved in the whole temperature range measured at the same field, which are very attractive for high performance ECE devices.
研究领域:
材料科学
·
物理学
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DOI
高影响因子
Journal of Energy Chemistry
·
2022
·
IF 13.599
Licheng Lou,Yuancai Gong,Jiazheng Zhou,Jinlin Wang,Xiao Xu,Kang Yin,Biwen Duan,Huijue Wu,Jiangjian Shi,Yanhong Luo,Dongmei Li,Hao Xin,Qingbo Meng
Photo-generated carrier recombination loss at the CZTSSe/CdS front interface is a key issue to the open-circuit voltage ( V OC ) deficit of Cu 2 ZnSnS x Se 4− x (CZTSSe) solar cells. Here, by the aid of an easy-handling spin-coating method, a thin PCBM ([6,6]-phenyl-C61-butyric acid methyl ester) layer as an electron extraction layer has been introduced on the top of CdS buffer layer to modify CZTSSe/CdS/ZnO-ITO (In 2 O 3 :Sn) interfacial properties. Based on Sn 4+ /DMSO (dimethyl sulfoxide) solution system, a total-area efficiency of 12.87% with a V OC of 529 mV has been achieved. A comprehensive investigation on the influence of PCBM layer on carrier extraction, transportation and recombination processes has been carried out. It is found that the PCBM layer can smooth over the CdS film roughness, thus beneficial for a dense and flat window layer. Furthermore, this CZTSSe/CdS/PCBM heterostructure can accelerate carrier separation and extraction and block holes from the front interface as well, which is mainly ascribed to the downward band bending of the absorber and a widened space charge region. Our work provides a feasible way to improve the front interfacial property and the cell performance of CZTSSe solar cells by the aid of organic interfacial materials.
研究领域:
材料科学
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太阳能
·
光伏技术
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产品关联
DOI
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2025
·
IF 4.6
Lin-Lin Zhang,Zeng Chen,Li Li,Wuying Yang,Dan Wang,Yanping Hong,Kaijie Tang,Jiaxin Hong,Lu-Ying Duan,Limin Lu
Developing a multifunctional sensor that can detect food-related multi-analytes is significant for food safety but remains challenging due to the difficulty of integrating multiple functions into one sensor. Herein, a dual-luminescent europium metal-organic framework (EuMOF) was elaborately synthesized through a simple self-assembly process, during which Eu 3+ coordinated with 2-hydroxyterephthalic acid (HTPA) and 1,10-phenanthroline that delivered strong characteristic fluorescence of HTPA and Eu 3+ . The resultant EuMOF exhibited good detection performance toward Sn 4+ and amitraz with different response behaviors. As for target Sn 4+ , the remarkably enhanced fluorescence from HTPA was observed and the fluorescence for Eu 3+ decreased significantly, which was attributed to the structural disintegration of EuMOF caused by Sn 4+ . Whereas, the presence of amitraz weakened both luminescence of HTPA and Eu 3+ owing to the synergistic function of inner filter effect and photoinduced electron transfer. Furthermore, an intelligent and miniature sensor that incorporated EuMOF-based test paper with color recognition application was exploited for portable visual analyzing Sn 4+ and amitraz in real samples, affording great possibilities for on-site monitoring of food hazards.
研究领域:
材料科学
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分析化学
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食品安全
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传感器与生物传感器
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环境监测
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产品关联
DOI
PubMed
高影响因子
Light-Science & Applications
·
2022
·Vol. 11
·期 1
·1-10
·
IF 20.257
Liu Dongjie,Li Guogang,Dang Peipei,Zhang Qianqian,Wei Yi,Qiu Lei,Molokeev Maxim S.,Lian Hongzhou,Shang Mengmeng,Lin Jun
Near-infrared (NIR)-emitting phosphor-converted light-emitting diodes have attracted widespread attention in various applications based on NIR spectroscopy. Except for typical Cr 3+ -activated NIR-emitting phosphors, next-generation Cr 3+ -free NIR-emitting phosphors with high efficiency and tunable optical properties are highly desired to enrich the types of NIR luminescent materials for different application fields. Here, we report the Fe 3+ -activated Sr 2− y Ca y (InSb) 1− z Sn 2 z O 6 phosphors that exhibit unprecedented long-wavelength NIR emission. The overall emission tuning from 885 to 1005 nm with broadened full-width at half maximum from 108 to 146 nm was realized through a crystallographic site engineering strategy. The NIR emission was significantly enhanced after complete Ca 2+ incorporation owing to the substitution-induced lower symmetry of the Fe 3+ sites. The Ca 2 InSbO 6 :Fe 3+ phosphor peaking at 935 nm showed an ultra-high internal quantum efficiency of 87%. The as-synthesized emission-tunable phosphors demonstrated great potential for NIR spectroscopy detection. This work initiates the development of efficient Fe 3+ -activated broadband NIR-emitting phosphors and opens up a new avenue for designing NIR-emitting phosphor materials.
研究领域:
材料科学
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光学工程
·
光谱学
✓ 已验证
DOI
高影响因子
JOURNAL OF LUMINESCENCE
·
2023
·
IF 3.6
Bingkai Gao,Lei Zhang,Runqiu Peng,Panlai Li,Qian Wu,Zhijun Wang
The exploration of performance luminescence near-infrared (NIR) material is crucial for rapidly developing NIR spectroscopic techniques. Herein, the NIR LaMg 0.5 Sn 0.5 O 3 :Cr 3+ phosphor was synthesized by a high temperature solid-state method. And its luminescence performance were improved by [In 3+ -Sc 3+ ] substituting for [Mg 2+ -Sn 4+ ]. The half-peak width can be expanded to 211 nm, the emission intensity can reach the seven times of that un-substitution, and the emission intensity at 423 K was maintained at 60 % of that at room temperature , moreover, the internal quantum efficiency can reach 54.2 %. On this basis, the phosphor converted light emitting diodes ( pc -LEDs) were achieved by combining La(Mg 1-x Sn 1-x In x Sc x ) 0.5 O 3 :Cr 3+ with blue LED, importantly, it can be applied to the biodetection and night vision lighting, which indicate its application value.
研究领域:
材料科学
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生物医学工程
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光学材料
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分子影像
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转化医学
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光电子学
✓ 已验证
DOI
高影响因子
SOLAR ENERGY
·
2024
·
IF 6
Letu Siqin,Chenjun Yang,Jingyuan Guo,Yutian Wang,Lei Wang,Yuan Li,Yiming Wang,Shuyu Li,Xiangyu Chen,Hongmei Luan,Ruijian Liu,Chengjun Zhu
The high open-circuit voltage deficit (V OC, def ) caused by structural imperfections in the absorber layer and charge loss during carrier transport is a critical barrier affecting the performance of Cu 2 ZnSn(S,Se) 4 (CZTSSe) devices. In this work, Ag was added to the DMF-based Cu + -Sn 4+ system, which significantly improved the crystal morphology and electrical properties of the absorber layer. Additionally, optimizing the selenization process not only reduced surface roughness and eliminated voids at the bottom of the absorber layer but also resulted in the formation of a MoSe 2 back interface layer with a more suitable thickness. These measures collectively enhanced the overall quality of the absorber layer, reducing the formation of deep-level defect clusters and effectively boosting carrier transport efficiency. Consequently, the concentration of bulk and interfacial defects decreased, and the impact of potential barriers on carrier movement was minimized. With these comprehensive improvements, the power conversion efficiency of CZTSSe solar cells increased from 8.48 % to 11.23 %. Our research demonstrates that optimizing the structure of the absorber layer can effectively enhance the performance of CZTSSe solar cells, providing valuable insights for the fabrication of high-efficiency devices in the future.
研究领域:
材料科学
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太阳能
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半导体物理
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产品关联
DOI
高影响因子
Materials Today Chemistry
·
2026
·
IF 6.7
Wanqing Qian,Yan Shu,Cai Pan,Xueqing Yu,Weitao Su,Mikhail P. Kuz'min,Kaixin Song
Near-infrared phosphor conversion light emitting diode (NIR pc-LED) has important application value in plant growth, night vision imaging and biological detection. Its performance depends on the optimized design of fluorescent materials. Based on gadolinium gallium garnet (Gd 3 Ga 5 O 12 ), the near-infrared phosphors of Gd 2.5 (CaSn) 0.5 (InAl) 0.5 Ga 3.5-x O 12 : xCr 3+ (x = 0.01–0.09) were prepared by Ca 2+ -Sn 4+ /In 3+ -Al 3+ double ion pair synergistic substitution strategy. Under excitation of 450 nm blue light, the material exhibits broadband near-infrared emission covering the range of 650–1150 nm, with a quantum yield of 96.29 %. The material exhibits excellent thermal stability of luminescence and can maintain 82.4 % of the initial emission intensity at room temperature at 423K. The NIR pc-LED device based on this phosphor package achieved 67.37 mW output power and 16.68 % photoelectric conversion efficiency at 100 mA driving current. Application verification shows that the NIR pc-LED light source shows excellent performance in plant supplementary light, night vision security, information encryption and nondestructive testing applications. It fully proves that the broadband near-infrared emission of this series of phosphors can take into account multi-functional application scenarios and has broad development prospects.
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产品关联
DOI
高影响因子
Science China-Materials
·
2025
·
IF 7.4
Peng Chunli,Tang Baoling,Zhang Xuejie,Molokeev Maxim S.,Zhang Haoran,Lei Bingfu
Near-infrared (NIR) spectroscopy has significantly advanced NIR light sources. However, creating NIR emitters with optimal luminescence properties, high thermal stability, and adjustable emission peaks poses a critical challenge for future smart NIR devices. We introduced a chemical unit cosubstitution strategy by incorporating Ca 2+ and Sn 4+ ions into the garnet structure. Through this approach, Y 3− y Ca y Ga 4.95− y Sn y G 12 :0.05Cr 3+ ( y = 0–1) phosphors were developed by modulating the A&C ligands, resulting in emission centers ranging from 708 to 768 nm. The modified local environment of Cr 3+ accounts for the increased light intensity (2.71 times) and broadening observed. Furthermore, this study investigated the impact of varying Cr 3+ concentrations (Y 2.6 Ca 0.4 Ga 4.6− x Sn 0.4 G 12 : x Cr 3+ ) on the production of high-performance phosphors. Compared with Y 3 Ga 4.93 G 12 :0.07Cr 3+ , the optimized phosphor exhibited exceptional external quantum efficiency (EQE = 34.96%). The luminescence enhancement is attributed to an increase in radiative transitions caused by octahedral Jahn-Teller distortion, whereas the notable thermal stability (91.3% at 423 K) is attributed to the presence of weak electron-phonon coupling (EPC) and oxygen vacancy (O V ) defects. Finally, by combining it with a 450 nm blue LED chip, we constructed a near-infrared phosphor-converted LED (NIR pc-LED) device with superior electroluminescence efficiency (18.8% @ 100 mA), increasing the ultralow quenching rate (< 5% intensity loss after 30 days of operation) and demonstrating remarkable performance in plant lighting applications.
研究领域:
材料科学
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光学材料
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固态照明
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光子学
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植物生物技术
✓ 已验证
产品关联
DOI
高影响因子
Materials Today Physics
·
2024
·
IF 10
Hongyan Yin,Lizhi Chen,Fangfei Liu,Tursun Abdiryim,Jiaying Chen,Xinyu Jing,Yancai Li,Mengyao Su,Xiong Liu
MXene-based conductive hydrogels have emerged as a new type of soft materials in flexible electronics. Herein, metal coordination is introduced into MXene-based conductive hydrogels to synchronously enhance the mechanical and self-healing properties. MXene-based conductive hydrogels are made up of polyacrylic acid (PAA), sium carboxymethyl cellulose (SCMC), Ti 3 C 2 T X and metal ions (Ni 2+ , Al 3+ or Sn 4+ ). PAA/SCMC/Ti 3 C 2 T X /Sn 4+ hydrogel is found to have excellent mechanical (stress: 122 kPa; strain: 1688 %; toughness: 0.95 ± 0.12 MJ m −3 ) and self-healing (self-healing efficiency: 99.27 % (conductivity); 81.16 % (stress); and 83.13 % (strain)) properties due to the metal coordination and H-bonding. The hydrogel has also good conductivity of 0.82 S m −1 and adhesion of 38.94 kPa. The flexible sensors based on this hydrogel can efficiently detect human motions, electromyography (EMG), electrocardiography (ECG) and handwriting signals. Furthermore, a supercapacitor assembled from this hydrogel has a high specific capacitance of 118.66 F g −1 and good stability (15000 charge-discharge cycles). This work provides an effective strategy for exploiting mechanically tough and self-healing MXene-based conductive hydrogels with prospective applications in flexible electronics.
研究领域:
材料科学
·
纳米技术
·
柔性电子
·
导电材料
·
自修复材料
✓ 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）