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Isovalent co-alloying contributes to considerable improvement in thermoelectric performance of BiSe bulks with weak anisotropy

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Journal of Materiomics 2024年第5期10卷 965-974页

作者： Fu Li Chen Liu Mohammad Nisar Jian Zhao Chongbin Liang Junze Zhang Ziyuan Wang Zhuanghao Zheng Ping Fan Xilin Wang Zhen-Hua Ge Yue-Xing Chen Shenzhen Key Laboratory of Advanced Thin Films and Applications Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong ProvinceCollege of Physics and Optoelectronic EngineeringShenzhen UniversityShenzhen518060GuangdongChina Kunming University of Science and Technology Kunming650093China Tsinghua Shenzhen International Graduate School Tsinghua UniversityShenzhen518060GuangdongChina

BiSe with intrinsic low thermal conductivity has considered as a promising thermoelectric(TE)material at nearly room *** improve its low thermoelectric figure of merit(zT),in this work,Sb and Te isovalent co-alloying was performed and significantly optimized its TE property with weakly anisotropic *** substituting Sb on Bi sites,the carrier concentration is suppressed by introduction of Sbsingle bond Se site defects,which contributes to the increased absolute value of Seebeck coefficient(|S|).Further co-alloying Te on Se of the optimized composition Bi_(0.7)Sb_(0.3)Se,the carrier concentration increased without affecting the|S|due to the enhanced effective mass,which leads to a highest power factor of 12.8μW/(cm·K^(2))at 423 *** a result,a maximum zT of∼0.54 is achieved for Bi_(0.7)Sb_(0.3)Se_(0.7)Te_(0.3) along the pressing direction and the average zT(zTave)(from 300 K to 623 K)are drastically improved from 0.24 for pristine BiSe sample to ***,an energy conversion efficiency∼4.0%is achieved for a single leg TE device of Bi_(0.7)Sb_(0.3)Se_(0.7)Te_(0.3)when applied the temperature difference of 339 K,indicating the potential TE application.

关键词： BiSe Isovalent alloying zT Carrier modulation

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Study on planar junction infrared detectors based on InAs/GaSb type-II superlattices

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Optical and Quantum Electronics 2025年第6期57卷 1-14页

作者： Wang, Zhifang Zhou, Yi Huang, Min Xu, Zhicheng Liao, Kecai Liang, Zhaoming Sun, Cheng Chen, Yijie Chen, Jianxin University of Shanghai for Science and Technology Shanghai200433 China Shanghai Institute of Technical Physics Shanghai200083 China School of Physics and Optoelectronic Engineering Hangzhou Institute for Advanced Study University of Chinese Academy of Sciences Hangzhou310024 China

InAs/GaSb type-II superlattice infrared detectors, with their advantages of tunable bandgap and high material uniformity, have become a preferred material for mid-infrared imaging detectors. Conventional superlattice infrared photodetectors predominantly employ mesa architectures. In contrast, planar junction configurations offer higher fill factors at reduced pixel dimensions while mitigating etch-induced leakage currents, rendering them promising alternatives. Nevertheless, research on such structures remains scarce in the literature. This study presents Si-implanted planar junction photodetectors based on InAs/GaSb type-II superlattices, achieved through optimised device design, fabrication, and systematic characterisation. X-ray diffraction (XRD) measurements indicate that the overall crystalline quality of the material remains intact mainly following post-implantation annealing, and spectral measurements verify the mid-wavelength infrared (MWIR, 3–5 μm) photoresponse. Performance tests further showed that the dark current of the device is related to the area of the implantation window, which decreases as the implantation window area increases. Subsequently, the LBIC laser-induced detection system was used to characterise the optical response distribution of the InAs/GaSb superlattice planar junction device at 77 K and to fit the signal decay curve outside the junction region. The findings indicate that the photosensitive region expanded by 5.4 ± 0.16 μm after implantation, demonstrating the presence of lateral carrier diffusion in the superlattice material. The results of this study show the feasibility of the planar junction design of the mid-infrared focal plane array. © The Author(s), under exclusive licence to Springer science+Business Media, LLC, part of Springer Nature 2025.

关键词： Infrared devices

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Extended observer-based consensus tracking control for MASs with external disturbance and dynamic event-triggered strategy

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science China(Technological sciences) 2025年第3期68卷 228-238页

作者： Jian LIAO Kai MAO Bin XIN Jing HE Yaoqing ZHANG Jun CHENG Delin LUO Shaolei ZHOU College of Physics and Electronic Information Gannan Normal UniversityGanzhou341000China Shenzhen Institute of Advanced Technology Chinese Academy of SciencesShenzhen518055China College of Basic Science Naval Aviation UniversityYantai264001China School of Automation Beijing Institute of TechnologyBeijing100081China School of Aerospace Engineering Xiamen UniversityXiamen361102China

This article explores the leader-following consensus tracking(LFCK)control issues of multi-agent systems(MASs)in the presence of external disturbances and general directed fixed communication *** purpose is to enable all follower agents to achieve consensus tracking for the leader ***,this article introduces an extended state observer for estimating each follower agent's unknown state and external ***,on the basis of the above-extended state observer and a dynamic event-triggered strategy,a distributed consensus tracking control protocol with disturbances restraint is developed,which can reduce the MAS's update frequency on the premise of ensuring the control protocol's ***,the MAS's stability and the absence of Zeno behavior are analyzed and proved by the established Lyapunov functional and linear matrix inequality ***,the validity and feasibility of the proposed approach are validated through a group of comparative numerical simulation experiments.

关键词： leader-following consensus tracking(LFCK) dynamic event-triggered strategy external disturbances state observer multi-agent systems

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Light-driven sextuple theranostics:nanomedicine involving second near-infrared AIE-active Ir(Ⅲ)complex for prominent cancer treatment

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science China Chemistry 2024年第7期67卷 2314-2324页

作者： Xue Liu Jiangao Li Fei Zhang Dingyuan Yan Lei Wang Dong Wang Ben Zhong Tang Center for AIE Research Shenzhen Key Laboratory of Polymer Science and TechnologyGuangdong Research Center for Interfacial Engineering of Functional MaterialsCollege of Material Science and EngineeringShenzhen UniversityShenzhen 518060China College of Physics and Optoelectronic Engineering Shenzhen UniversityShenzhen 518060China School of Science and Engineering Shenzhen Institute of Aggregate Science and TechnologyThe Chinese University of Hong KongShenzhen(CUHK-Shenzhen)Shenzhen 518172China

Light-driven cancer theranostics has shown inexhaustible and vigorous vitality by virtue of its high efficacy,prominent controllability and *** of an all-round theranostic material simultaneously affording both multimodal diagnosis imaging and synergistic phototherapy would be an appealing yet significantly challenging ***,a novel nanomedicine Ir@PPEG-MeEPO was ingeniously constructed by integrating beforehand1O2-charged amphiphilic polymer and well-tailored Ir(Ⅲ)complex IrDPTP,which was featured by second near-infrared(NIR-Ⅱ)aggregation-induced emission(AIE)tendency,efficient reactive oxygen species(ROS)generation,good photothermal conversion efficiency and high-performance hydrogen gas *** the best of our knowledge,IrDPTP held the longest emission wavelength among all reported AIE Ir(Ⅲ)***,Ir@PPEG-MeEPO was capable of controllably releasing ROS via triggered photothermal effect upon NIR irradiation,making it well-adapted to hypoxic environment of *** distinctive characteristics of Ir@PPEG-MeEPO endowed it with unprecedented performance on sextuple theranostics comprised of NIR-Ⅱfluorescence-photoacoustic-photothermal trimodal imaging and photodynamic-photothermal-hydrogen trimodal therapy,witnessed by the precise tumor diagnosis and complete tumor *** study would open up new perspectives for the exploration of superior nanomedicine for practical cancer theranostics.

关键词： aggregation-induced emission NIR-II emission cancer theranostics multimodal diagnosis imaging multimodal therapy

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Elements gradient doping in Mn-based Li-rich layered oxides for long-life lithium-ion batteries

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材料科学技术（英文版） 2025年第4期207卷 266-273页

作者： Yinzhong Wang Shiqi Liu Xianwei Guo Boya Wang Qinghua Zhang Yuqiang Li Yulong Wang Guoqing Wang Lin Gu Haijun Yu Institute of Advanced Battery Materials and Devices College of Materials Science and EngineeringBeijing University of TechnologyBeijing 100124China Key Laboratory of Advanced Functional Materials Ministry of EducationBeijing University of TechnologyBeijing 100124China Institute of Advanced Battery Materials and Devices College of Materials Science and EngineeringBeijing University of TechnologyBeijing 100124China Key Laboratory of Advanced Functional Materials Ministry of EducationBeijing University of TechnologyBeijing 100124China Beijing Create Energy & Benefit Future Co. Ltd.Beijing 100176China Beijing National Laboratory for Condensed Matter Physics Institute of PhysicsChinese Academy of SciencesBeijing 100190China National Center of Electron Microscopy in Beijing School of Materials Science and EngineeringTsinghua UniversityBeijingChina

The cobalt-free Mn-based Li-rich layered oxide material has the advantages of low cost,high energy den-sity,and good performance at low temperatures,and is the promising choice for energy storage ***,the long-cycling stability of batteries needs to be ***,the Mn-based Li-rich cath-ode materials with small amounts of Li2MnO3 crystal domains and gradient doping of Al and Ti elements from the surface to the bulk have been developed to improve the structure and interface *** the batteries with a high energy density of 600 Wh kg-1,excellent capacity retention of 99.7％with low voltage decay of 0.03 mV cycle-1 after 800 cycles,and good rates performances can be ***,the structure and cycling stability of low voltage Mn-based Li-rich cathode materials can be significantly improved by the bulk structure design and interface regulation,and this work has paved the way for developing low-cost and high-energy Mn-based energy storage batteries with long lifetime.

关键词： Mn-based Li-rich layered oxide cathode Li2MnO3 crystal domain Elemental gradient Lithium-ion batteries Energy storage

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Wide temperature range,air stable,transparent,and self-powered photodetectors enabled by a hybrid film of graphene and singlewalled carbon nanotubes

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Nano Research 2024年第7期17卷 6582-6593页

作者： Ying Yue Di Zhang Pengyu Wang Xin Wu Yuejuan Zhang Yanchun Wang Xiao Zhang Xiaojun Wei Huaping Liu Weiya Zhou Beijing National Laboratory for Condensed Matter Physics and Institute of PhysicsChinese Academy of SciencesBeijing 100190China School of Physical Sciences and College of Materials Science and Optoelectronic Technology University of Chinese Academy of SciencesBeijing 100049China Songshan Lake Materials Laboratory Dongguan 523808China Beijing Key Laboratory for Advanced Functional Materials and Structure Research Beijing 100190China

Transparent photovoltaic devices(TPVDs)have attracted increasing attention in emerging electronic *** the application scenarios extend,there raise higher requirements regarding the stability and operating temperature range of *** this work,a unique preparation strategy is proposed for air stable TPVD with a wide operating temperature range,i.e.,a nanoscale architecture termed as H-TPVD is constructed that integrates a free-standing and highly transparent conductive hybrid film of graphene and single-walled carbon nanotubes(G-SWNT TCF for short)with a metal oxide NiO/TiO_(2)*** preparation approach is suitable for scaling *** to the excellent transparent conductivity of the freestanding G-SWNT hybrid film and the ultrathin NiO/TiO_(2)heterojunction(100 nm),H-TPVD selectively absorbs the ultraviolet(UV)band of sunlight and has a transparency of up to 71%in the visible *** integrated nanoscale architecture manifests the significant holecollecting capability of the G-SWNT hybrid film and the efficient carrier generation and separation within the ultrathin NiO/TiO_(2)heterojunction,resulting in excellent performance of the H-TPVD with a specific detectivity of 2.7×10^(10) ***,the freestanding G-SWNT TCF is a super stable and non-porous two-dimensional film that can insulate gas molecules,thereby protecting the surface properties of NiO/TiO_(2)heterojunctions and enhancing the stability of *** subjected to 20,000 cycles and storage in air for three months,the performance parameters such as photo-response signal,output power,and specific detectivity show no noticeable *** particular,the as-fabricated self-powered H-TPVD can operate over a wide temperature range from −180 to 300℃,and can carry out solar-blind UV optical communication in this *** addition,the 4×4 array H-TPVD demonstrates clear optical *** results make it possible for H-TPVD to expand its potential application scenarios.

关键词： transparent photovoltaic devices hybrid films of graphene and single-walled carbon nanotubes metal oxides stability wide temperature range

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Fe doping 1T phase MoS_(2)with enhanced zinc-ion storage ability and durability for high-performance aqueous zinc-ion batteries

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Rare Metals 2025年第1期44卷 253-263页

作者： Jing-Yi Liu Rong-Jie Zhe Zhan-Hong Peng Yi-Hui Song Lin-Xuan Yang Chen Qing Jun-Ling Guo Jin-Ping Liu Yunnan Key Laboratory of Opto-Electronic Information Technology College of Physics and Electronic Information TechnologyYunnan Normal UniversityKunming 650000China Country State Center for International Cooperation on Designer Low-Carbon and Environmental Materials School of Materials Science and EngineeringZhengzhou UniversityZhengzhou 450001China School of Chemistry Chemical Engineering and Life ScienceState Key Laboratory of Advanced Technology for Materials Synthesis and ProcessingWuhan University of TechnologyWuhan 430070China

As a promising cathode material for aqueous zinc-ion batteries,1T-MoS_(2)has been extensively investigated because of its facile two-dimensional ion-diffusion channels and high electrical ***,the limited number of available Zn storage sites,i.e.,limited capacity,hinders its application because the inserted Zn^(2+),which form strong electrostatic interactions with 1T-MoS_(2),preventing subsequent Zn^(2+)***,the approach of enlarging the interlayer distance to reduce electrostatic interactions has been commonly used to enhance the capacity and reduce Zn^(2+)migration ***,an enlarged interlayer spacing can weaken the van der Waals force between 1T-MoS_(2)monolayers,easily disrupting the structural ***,to address this issue,an effective strategy based on Fe doping is proposed for 1T-MoS_(2)(Fe-1T-MoS_(2)).The theoretical calculations reveal that Fe doping can simultaneously moderate the rate of decrease in the adsorption energy after gradually increasing the number of stored atoms,and enhance the electron delocalization on metal-O ***,the experiment results show that Fe doping can simultaneously activate more Zn storage sites,thus enhancing the capacity,and stabilize the structural stability for improved cycling ***,Fe-1T-MoS_(2)exhibits a larger capacity(189 mAh·g^(-1)at 0.1 A·g^(-1))and superior cycling stability(78%capacity retention after 400 cycles at 2 A·g^(-1))than pure 1T-MoS_(2).This work may open up a new avenue for constructing high-performance MoS_(2)-based cathodes.

关键词： Aqueous zinc-ion battery 1T-MoS_(2) Fe doping More Zn storage sites Enhanced structural stability

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N-doped β-Ga2O3/Si-doped β-Ga2O3 linearly-graded p-n junction by a one-step integrated approach

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材料科学技术（英文版） 2025年第6期209卷 196-206页

作者： Chenxing Liu Zhengyuan Wu Hongchao Zhai Jason Hoo Shiping Guo Jing Wan Junyong Kang Junhao Chu Zhilai Fang School of Information Science and Technology and Institute of OptoelectronicsFudan UniversityShanghai 200433China Advanced Micro-Fabrication Equipment Inc. 188 Taihua RoadShanghai 201201China Collaborative Innovation Center for Optoelectronic Semiconductors and Efficient Devices Department of PhysicsXiamen UniversityXiamen 361005China

The p-n junction is the foundation building structure for manufacturing various electronic and optoelec-tronic *** bandgap semiconductors are expected to overcome the limited power capability of Si-based electronic device,however,it is very difficult to achieve efficient bipolar doping due to the asymmetric doping effect,thereby impeding the development of p-n homojunction and related bipolar devices,especially for the Ga2O3-based materials and ***,we demonstrate a unique one-step integrated growth of p-type N-doped(201)β-Ga2O3/n-type Si-doped((2)01)β-Ga2O3 films by phase tran-sition and in-situ pre-doping of dopants,and fabrication of full β-Ga2O3 linearly-graded p-n homojunc-tion diode from *** full β-Ga2O3 p-n homojunction diode possesses a large built-in potential of 4.52 eV,a high operation electric field＞2.90 MV/cm in the reverse-bias regime,good longtime-stable rectifying behaviors with a rectification ratio of 104,and a high-speed switching and good surge robust-ness with a weak minority-carrier charge *** work opens the way to the fabrication of Ga2O3-based p-n homojunction,lays the foundation for full β-Ga2O3-based bipolar devices,and paves the way for the novel fabrication of p-n homojunction for wide-bandgap oxides.

关键词： β-Ga2O3 films in-situ pre-doping Linearly-graded p-n junction Forward and reverse characteristics Built-in potential

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O-doping strategy enabling enhanced chemical/electrochemical stability of Li_(3)InCl_(6) for superior solid-state battery performance

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Journal of Energy Chemistry 2024年第12期99卷 484-494页

作者： Qiyue Luo Chen Liu Lin Li Ziling Jiang Jie Yang Shaoqing Chen Xia Chen Long Zhang Shijie Cheng Chuang Yu State Key Laboratory of Advanced Electromagnetic Technology School of Electrical and Electronic EngineeringHuazhong University of Science and TechnologyWuhan 430074HubeiChina School of Chemistry and Chemical Engineering Huazhong University of Science and TechnologyWuhan 430074HubeiChina College of Energy Soochow Institute for Energy and Materials InnovationsJiangsu Provincial Key Laboratory for Advanced Carbon Materials and Wearable Energy TechnologiesSoochow UniversitySuzhou 215006JiangsuChina College of Physics and Energy Fujian Normal UniversityFuzhou 350117FujianChina

Solid-state electrolytes with high oxidation stability are crucial for achieving high power density allsolid-state lithium *** electrolytes are promising candidates due to their outstanding compatibility with cathode materials and high Li^(+)***,the electrochemical stability of chloride electrolytes is still limited,leaving them unsuitable for ultrahigh voltage ***,chemical compatibility issue between sulfide and halide electrolytes affects the electrochemical performance of all-solid-state ***,Li-ion conductor Li_(3+x)InCl_(6-x)O_(x) is designed to address these ***_(3.25)InCl_(5.75)O_(0.25)shows a Li-ion conductivity of 0.90 mS cm^(-1)at room temperature,a high onset oxidation voltage of 3.84 V,fewer by-products at ultrahigh operation voltage,and good chemical compatibility with Li_(5.5)PS_(4.5)Cl_(1.5).The Li_(3.25)InCl_(5.75)O_(0.25)@LiNi_(0.7)Co_(0.1)Mn_(0.2)O_(2)-Li_(3.25)InCl_(5.75)O_(0.25)-VGCF/Li_(3.25)InCl_(5.75)O_(0.25)/Li_(5.5)PS_(4.5)Cl_(1.5)/Li-In battery delivers good electrochemical performances at high operating *** work provides a simple,economical,and effective strategy for designing high-voltage all-solid-state electrolytes.

关键词： Li_(3)InCl_(6) O doping Wide electrochemical window Chemical stability Interfacial stability Superior electrochemical performance

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Highly sensitive,humidity-tolerant and flexible NO_(2)sensors based on nanoplate Bi_(2)Se_(3)film

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Chinese Chemical Letters 2023年第8期34卷 408-411页

作者： Yanjie Wang Cheng Tang Min Su Yixiong Ji Lei Xie Qi Yang Aijun Du Yong Zhou Jun Yang Key Laboratory of Optoelectronic Technology and System of Ministry of Education College of Optoelectronic EngineeringChongqing UniversityChongqing 400044China School of Chemistry and Physics Centre of Materials ScienceQueensland University of TechnologyBrisbane 4001Australia Chongqing Institute of Green and Intelligent Technology Chinese Academy of SciencesChongqing 400714China

Recently,two-dimension(2D)materials have fueled considerable interest in the field of gas sensing to cope urgent demands at specific ***,the susceptibility to ambient humidity,and/or fragile operation stability always frustrate their further *** overcome these drawbacks,we proposed one novel flexible gas sensor based on bismuth selenide(Bi_(2)Se_(3))nanoplates for sensitive NO_(2)detection at room *** as-prepared Bi_(2)Se_(3)sensor exhibited favorable sensing performance,including remarkable NO_(2)selectivity,high response of 120%and fast response time of 81 s toward 5ppm NO_(2),an ultralow detection limit of 100 ppb,and nice ***,the excellent humidity tolerance and mechanical flexibility endowed Bi_(2)Se_(3)sensors with admirable reliability under harsh working *** first-principles calculation further revealed the insights of extraordinary NO_(2)selectivity and the underlying gas-sensing mechanism.

关键词： Flexible NO_(2)sensor Bi_(2)Se_(3)nanoplates Humidity tolerance Room-temperature operation First-principles calculation

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