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Microstructural,magnetic and dielectric performance of rare earth ion(Sm^(3+))-doped MgCd ferrites

Chinese Physics B 2022年第7期31卷 643-647页

作者： Dandan Wen Xia Chen Dasen Luo Yi Lu Yixin Chen Renpu Li Wei Cui Doctoral Research Station of Chongqing Key Laboratory of Optoelectronic Information Sensing and Transmission Technology Chongqing University of Post and TelecommunicationsChongqing 400065China State Key Laboratory of Electronic Thin Films and Integrated Devices University of Electronic Science and Technology of ChinaChengdu 610054China Chongqing Key Laboratory of Autonomous Navigation and Microsystem Chongqing University of Post and TelecommunicationsChongqing 400065China

The combined effects of Sm^(3+)substitution together with the addition of 3 wt%Bi_(2)O_(3)endow Mg Cd ferrites with excellent magnetic permeability and dielectric *** concentrations of Sm^(3+)(x=0,0.03,0.06,0.09,0.12and 0.15)were employed to modify the permeability(μ)and permittivity(ε)of the Mg Cd ferrites.X-ray diffraction,scanning electron microscopy(SEM),vibrating sample magnetometry and vector network analysis techniques were used to characterize the *** measurement results reveal that the ferrites processed a saturation magnetization of up to 36.8 emu/g and coercivity of up to 29.2 Oe via the conventional solid-state reaction *** surface morphology SEM confirms that with increasing Sm^(3+)concentration,the grain shape changes from a polygon to a ***,the dielectric permittivity can reach a value of *** excellent properties obtained in Sm^(3+)-substituted Mg ferrites suggest that they could be promising candidates for modern high-frequency antenna substrates or multilayer devices.

关键词： ferrites Sm^(3+)ions substitution magnetic permeability dielectric permittivity

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Light-stimulated synaptic transistor based on two-dimensional/organic heterojunction for neuromorphic computing 6

Light-stimulated synaptic transistor based on two-dimensiona...

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6th Conference on Frontiers in Optical Imaging and technology: Novel Detector Technologies

作者： Han, Chao Han, Jiayue Yu, He Gou, Jun Wang, Jun School of Optoelectronic Science and Engineering University of Electronic Science and Technology of China Chengdu610054 China State Key Laboratory of Electronic Thin Films and Integrated Devices University of Electronic Science and Technology of China Chengdu610054 China

ISBN: (数字)9781510679696

ISBN: (纸本)9781510679689

Neuromorphic computing has considerable potential in simulating the efficient information processing capabilities of the human brain. Implementing neuromorphic computing requires the development of artificial synaptic devices that mimic biological synapses, which are the basic for information processing, storage, and transmission in biological neural networks. Herein, we demonstrate a light-stimulated synaptic transistor (LSST) device based on graphene/hexagonal boron nitride (h-BN)/pentacene heterojunction for emulating the basic functions of the human brain. The LSST devices can detect light stimulus at a wavelength of 520 nm and exhibits a variety of typical synaptic properties, such as excitatory postsynaptic current, paired pulse facilitation, and transition from short-term memory to long-term memory. In addition, the LSST device is capable of simulating the learning and forgetting processes of the human brain. Based on the optically and electrically controlled conductivity modulation characteristics of the LSST device, we construct an artificial neural network for perform pattern recognition tasks, and recognition accuracy of handwritten digits is 88.5%. These results mean that our LSST devices have great potential for future applications in neuromorphic computing. © 2024 SPIE.

关键词： Graphene

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Vanadyl Sulfate Based Hole-Transporting Layer Enables Efficient Organic Solar Cells

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Chinese Journal of Chemistry 2024年第14期42卷 1644-1650页

作者： Mengdi Li Yuqing Sun Yang Cheng Chaowei Zhao Jicai Zhang Weiwei Li Research Center for Optoelectronic Materials and Devices School of Physical Science and TechnologyGuangxi UniversityNanningGuangxi530004 China Institute of Applied Chemistry Jiangxi Academy of SciencesNanchangJiangxi330096 China Beijing Advanced Innovation Center for Soft Matter Science and Engineering&State Key Laboratory of Organic-Inorganic Composites Beijing University of Chemical TechnologyBeijing100029 China

It remains an urgent task to develop alternative hole-transporting layer(HTL)materials beyond commonly used PEDOT:PSS to increase the shelf-life of organic solar cells(OSCs).Inorganic metal oxide type materials,such as NiO_(x),CoO_(x)and VO_(x),with suitable work functions have attracted numerous research attention *** this work,more abundant and easily accessible oxygenated salt,vanadyl sulfate(VOSO_(4))has been demonstrated to be excellent choice as HTL for *** VOSO_(4)-based HTL can be readily processed by spin-coating from the precursor solution with subsequent thermal annealing and UVO *** a consequence,a high power conversion efficiency(PCE)of 18.72%can be achieved for PM8:L8-BO based OSCs with the VOSO_(4)-based *** transmittance,smooth film surface,suitable energy level and high conductivity were revealed to contribute to the high OSC *** importantly,compared to device with PEDOT:PSS,VOSO_(4)-based OSCs exhibit improved stability when stored in the N_(2)filled glove *** being stored for 600 h,VOSO_(4)-based device can retain 89%of its initial ***,VOSO_(4)can be used as general HTL in PM6:BTP-BO-4Cl and PM6:IT-4F based OSCs,yielding high PCEs of 17.87%and 13.85%,respectively.

关键词： Organic solar cells Semiconductors Hole-transporting layers Vanadyl sulfate Power output Efficiency Vanadium Interfacial modification

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Structural design of organic battery electrode materials:from DFT to artificial intelligence

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Rare Metals 2023年第10期42卷 3269-3303页

作者： Ting-Ting Wu Gao-Le Dai Jin-Jia Xu Fang Cao Xiao-Hong Zhang Yu Zhao Yu-Min Qian Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices Soochow UniversitySuzhou215123China College of Materials Chemistry and Chemical EngineeringHangzhou Normal UniversityHangzhou311121China Department of Chemistry and Biochemistry University of Missouri–St.LouisSt.LouisMO63121USA Department of Health Technology Technical University of DenmarkKgs.Lyngby2800Denmark Key Lab of Advanced Optoelectronic Quantum Architecture and Measurement Beijing Key Lab of Nanophotonics and Ultrafine Optoelectronic Systemsand School of PhysicsBeijing Institute of TechnologyBeijing100081China

Redox-active organic materials are emerging as the new playground for the design of new exciting battery materials for rechargeable batteries because of the merits including structural diversity and tunable electrochemical properties that are not easily accessible for the inorganic *** importantly,the sustainability developed by using naturally abundant chemical elements(C,H,N,O and S) makes them as an ideal alternative material for Li-ion batteries(LIBs).However,the identification and screening of proper organic materials is still challenging in the past *** by the artificial intelligence,this review will give a summary of the theoretical design aspects of redox-active organic materials from densityfunctional theory(DFT) to machine learning(ML) methods in the past two decades,with a particular emphasis on the calculation method to predict the chemical/electrochemical stability and *** review will also analyze and discuss the challenges and perspectives for the development of organic battery materials.

关键词： Organic battery Density-functional theory(DFT) High-throughput computation Machine learning(ML)

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Enhanced efficiency of high-speed Si and Si-based PbSe MSM photodiodes with integrated photon-trapping holes at 800–1550 nm wavelengths

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Chinese Optics Letters 2024年第10期22卷 58-64页

作者： Lixin Liu Jun Gou Chunyu Li Jiayue Han Xiutao Yang Jin Chen Zijian Zhang Zheyuan Xie He Yu Zhiming Wu Jun Wang School of Optoelectronic Science and Engineering University of Electronic Science and Technology of ChinaChengdu 610054China State Key Laboratory of Electronic Thin Films and Integrated Devices University of Electronic Science and Technology of ChinaChengdu 610054China Key Laboratory of Science and Technology on Infrared Detector Luoyang 471099China

We theoretically and experimentally demonstrate a cylinder-shaped hole array with a small depth and an appropriate period integrated on a silicon-on-insulator substrate can enhance infrared absorption due to more bending of light and a higher back *** Si metal-semiconductor-metal(MSM)photodiode with an hole array,whose depth is 250 nm,exhibits a4-fold improved external quantum efficiency(EQE)of 81%,and an ultra-fast impulse response speed of 22 ps enabling a 3 d B bandwidth of up to 23.9 *** film with a thickness of 80 nm is integrated to broaden the response wavelength.A more than 500%EQE enhancement of the Si-based PbSe photodiode with 150-nm-deep photon-trapping holes is achieved at1550 nm compared to the device without hole structures.

关键词： Si photodiode photon-trapping holes MSM Si-based PbSe photodiode enhanced EQE

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Enhanced electromechanical properties of Bi0.5Na0.5TiO3-BiFeO3-BaTiO3 ceramics via relaxor behavior and phase boundary design

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Ceramics International 2025年第17期51卷 23374-23382页

作者： Gao, Shaowei Xu, Yuhui He, Xiang Liu, Ying Li, Tao Pang, Dongfang College of Rare Earths Jiangxi University of Science and Technology Jiangxi Ganzhou341000 China Key Laboratory of high-performance ceramics and ultrastructure Shanghai Institute of Ceramics Chinese Academy of Sciences Shanghai201800 China Key Laboratory of Optoelectronic Materials Chemistry and Physics Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences 350002 Fujian Fuzhou350002 China Key Laboratory of smart crystal materials and devices Ganjiang Innovation Academy Chinese Academy of Sciences Jiangxi Ganzhou341003 China

A lead-free piezoelectric ceramic doped with 1 mol% MnO2 and 0.75Bi0.5Na0.5TiO3-(0.25-x)BiFeO3-xBaTiO3 (x = 0.17–0.22) was prepared using conventional solid-state sintering method. The ceramics have a pure perovskite structure and form a mixed phase transition region (MPB) consisting of rhombohedral and tetragonal phases at x = 0.17–0.22. This was confirmed by Rietveld refinement and Raman spectroscopy deconvolution. Moreover, with the increase of BT content, a significant abatement of dielectric relaxation characteristics can be observed. When x = 0.22, the ferroelectric relaxation temperature is 145 °C, and Curie temperature TC is 272 °C. The ceramic with x = 0.17 possesses higher Curie temperature (TC = 284 °C), and the maximum positive strain (0.5 %) with low hysteresis (H = 25 %), leading to a large d33∗ (500 p.m./V) at 100 kV/cm, exhibiting excellent electromechanical performance. These results indicate that designing a ternary system of 0.75Bi0.5Na0.5TiO3-(0.25-x)BiFeO3-xBaTiO3 ceramics with relaxor ferroelectric phase transition behavior provides an effective way to optimize the electrical strain behavior of lead-free ceramics. © 2025

关键词： Perovskite

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Sensitivity improvement by Vernier effect in microwave photonic filter based on F-P fiber ring

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optoelectronics Letters 2025年

作者： LIN Rui ZHANG Ailing CHANG Pengxiang PAN Honggang WANG Minghe WANG Bo Engineering Research Center of Optoelectronic Devices & Communication Technology， Ministry of Education， Tianjin Key Laboratory of Film Electronic and Communication Devices， School of Electrical and Electronic Engineering， Tianjin University of Technology

A high sensitivity fiber optic temperature sensor based on Vernier effect in microwave photonic filter based on two paralleled F-P (Fabry-Perot) fiber ring is proposed and experimentally verified. Sensitivity is improved through the Vernier effect， which is caused by two parallel F-P fiber rings with approximate lengths. Temperature interrogation is achieved by monitoring the notch frequency of the superimposed frequency response curve. The temperature sensitivity of -484.514kHz/℃ is achieved in experiment， which is 57 times of the sensor without Vernier effect. The improved sensitivity and simple structure make it have wide potential applications in temperature monitoring of power systems.

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Porphyrin-based Nanosonosensitizers Combined with Targeting Peptides for Sonodynamic Therapy of Glioma

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Chinese Journal of Polymer Science 2022年第9期40卷 1120-1128页

作者： Mei-Yu Jiang Jia-Sheng Wu Wei-Min Liu Hao-Hui Ren Xin Wang Peng-Fei Wang Key Laboratory of Photochemical Conversion and Optoelectronic Materials and CityU-CAS Joint Laboratory of Functional Materials and Devices Technical Institute of Physics and ChemistryChinese Academy of SciencesBeijing 100190China School of Future Technology University of Chinese Academy of SciencesBeijing 100049China

Traditional cancer treatments have disadvantages of large trauma area and toxic side effects while killing cancer ***-targeted sonodynamic therapy(SDT)can effectively improve specificity of cancer treatment and overcome the problem of low tissue penetration depth caused by a photo-driven ***,we developed a porphyrin-based sonosensitizer with a water-soluble polymer as a biological carrier and a cRGD peptide for tumor targeting,which constituted a nano sonosensitizer(T-cRGD NPs)for fluorescence imaging-guided sonodynamic therapy.A comparable sonosensitizer(T-PEG NPs)without the targeting unit was also prepared for illustration of therapeutic *** to the role of peptide targeting,T-cRGD NPs can accumulate and enter tumor cells for fluorescence imaging and show a superior SDT effect than T-PEG NPs in *** imaging in vivo reveals that T-cRGD NPs can enrich in tumor tissues within 14 h with a good biocompatibility.

关键词： Sonodynamic therapy Glioma Cyclic peptide Target enrichment Deep penetration

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Crosstalk-free multichannel sensor based on a dual-Sagnac interferometer interrogated by microwave photonic filter

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optoelectronics Letters 2025年

作者： ZHANG Ailing WANG Bo ZHANG Yongfu CHANG Pengxiang WANG Minghe LIN Rui Engineering Research Center of Optoelectronic Devices & Communication Technology， Ministry of Education， Tianjin Key Laboratory of Film Electronic and Communication Devices， School of Electrical and Electronic Engineering， Tianjin University of Technology

A crosstalk-free multichannel sensor based on a dual-Sagnac interferometer interrogated by microwave photonic filter (MPF) is demonstrated theoretically and experimentally in this paper. The dual-Sagnac interferometer is taken as the sensing element as well as an optical spectrum slicer to implement a dual-passband MPF. Experimental results show that the proposed multichannel sensor is crosstalk-free， and the temperature sensitivity of each channel is -0.9884 MHz/℃ and -1.9302 MHz/℃， respectively. The sensing interrogation system has good linearity and stability and it is suitable for application scenarios where multiple points of temperature are required to monitor simultaneously.

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Highly Sensitive Metamaterial Plasmonic Sensor Based on Nanoimprinting

Highly Sensitive Metamaterial Plasmonic Sensor Based on Nano...

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2023 Opto-Electronics and Communications Conference, OECC 2023

作者： Zheng, Enlai Zhang, Xuanming Lou, Fei Cheng, Xin Lei, Lei Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province College of Physics and Optoelectronic Engineering Shenzhen University Shenzhen China Southern University of Science and Technology Department of Materials Science and Engineering Shenzhen China

ISBN: (纸本)9781665462136

In this paper, we propose and experimentally demonstrate a highly sensitive plasmonic nanohole metasurface sensor using nanoimprinting and electron beam evaporation. A refractive index sensitivity of 516 nm/RIU has been successfully achieved. With the help of nanoimprinting, the proposed method exhibits intrinsic advantages in a simple fabrication process, high repeatability and low cost. Furthermore, the proposed method enables large-area fabrication, making the mass-production of the metamaterial sensor highly feasible. © 2023 IEEE.

关键词： Metamaterials

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