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Recent progresses in thermal treatment of β-Ga_(2)O_(3) single crystals and devices

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International Journal of Minerals,Metallurgy and materials 2024年第7期31卷 1659-1677页

作者： Yuchao Yan Zhu Jin Hui Zhang Deren Yang State key laboratory of Silicon and Advanced Semiconductor materials and School of materials Science and Engineering Zhejiang UniversityHangzhou 310027China Zhejiang Provincial key laboratory of Power Semiconductor materials and devices ZJU-Hangzhou Global Scientific and Technological Innovation CenterHangzhou 311200China

In recent years,ultra-wide bandgap β-Ga_(2)O_(3) has emerged as a fascinating semiconductor material due to its great potential in power and photoelectric devices.In semiconductor industrial,thermal treatment has been widely utilized as a convenient and effective approach for substrate property modulation and device fabrication.Thus,a thorough summary of β-Ga_(2)O_(3) substrates and devices behaviors after high-temperature treatment should be significant.In this review,we present the recent advances in modulating properties of β-Ga_(2)O_(3) substrates by thermal treatment,which include three major applications:(ⅰ)tuning surface electrical properties,(ⅱ)modifying surface morphology,and(ⅲ)oxidating films.Meanwhile,regulating electrical contacts and handling with radiation damage and ion implantation have also been discussed in device fabrication.In each category,universal annealing conditions were speculated to figure out the corresponding problems,and some unsolved questions were proposed clearly.This review could construct a systematic thermal treatment strategy for various purposes and applications of β-Ga_(2)O_(3).

关键词： β-gallium oxide thermal treatment substrates devices

A multifunctional nanoaggregate-based system for detection of rheumatoid arthritis via Optoacoustic/NIR-Ⅱ fluorescent imaging and therapy via inhibiting JAK-STAT/NF-κB/NLRP3 pathways

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Aggregate 2024年第1期5卷 353-366页

作者： Junjie Chen Longqi Chen Zunpan She Fang Zeng Shuizhu Wu Biomedical Division State Key Laboratory of Luminescent Materials and DevicesGuangdong Provincial Key Laboratory of Luminescence from Molecular AggregatesCollege of Materials Science and EngineeringSouth China University of TechnologyGuangzhouChina

Rheumatoid arthritis(RA)is a debilitating autoimmune disease that causes chronic pain and serious complications,presenting a significant challenge to treat.Promising approaches for treating RA involve signaling pathways modulation and targeted therapy.To this end,a multifunctional nanosystem,TPC-U@HAT,has been designed for RA therapy,featuring multitargeting,dual-stimuli response,and on-demand drug release capabilities.TPC-U@HAT is composed of a probe/prodrug TPC,a JAK1 kinase inhibitor upadacitinib,and the drug carrier HAT.TPC is composed of an aggregation-induced emission(AIE)-active NIR-II chromophore TPY and an NF-κB/NLRP3 inhibitor caffeic acid phenethyl ester(CAPE),connected via boronic ester bond which serves as the reactive-oxygen-species-responsive linker.The carrier,HAT,is created by grafting bone-targeting alendronate and hydrophobic tocopheryl succinate onto hyaluronic acid chains,which can encapsulate TPC and upadacitinib to form TPC-U@HAT.Upon intravenous injection into mice,TPC-U@HAT accumulates at inflamed lesions of RA through both active and passive targeting,and the overexpressed hyaluronidase and H_(2)O_(2) therein cleave the hyaluronic acid polymer chains and boronate bonds,respectively.This generates an AIE-active chromophore for detection and therapeutic evaluation of RA via both optoacoustic imaging and NIR-II fluorescent imaging and concomitantly releases CAPE and upadacitinib to exert efficacious therapy by inhibiting NF-κB/NLRP3 and JAK-STAT pathways.

关键词： aggregation-induced emission dual-stimuli response multispectral optoacoustic tomography imaging multitargeting NIR-II fluorescence imaging rheumatoid arthritis

ZnGa_(2)S_(4):an infrared nonlinear optical material with large second-harmonic generation response and wide band gap

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Rare Metals 2024年第1期43卷 395-401页

作者： Chen-Yang Zhang Xiao-Nan Niu Yan-Feng Wei Shu-Xing Zhou Da-Qing Yang Ying Wang Jian Wang Bing-Bing Zhang College of Chemistry and materials Science Key Laboratory of Medicinal Chemistry and Molecular Diagnosis of the Ministry of EducationState Key Laboratory of New Pharmaceutical Preparations and ExcipientsHebei UniversityBaoding 071002China Hubei key laboratory of Low Dimensional optoelectronic materials and devices Hubei University of Arts and ScienceXiangyang 441053China Hubei Longzhong laboratory Xiangyang 441000China Department of Chemistry and Biochemistry Wichita State UniversityKansas 67260USA

High-performance nonlinear optical(NLO)crystals are crucial devices to convert wavelength of solid-state lasers.Chalcogenides play an indispensable role in the research of infrared NLO materials.In this work,ternary chalcogenide ZnGa_(2)S_(4) with defect diamond-like structure was screened out and synthesized by chemical vapor transport method.

关键词： optical nonlinear harmonic

Low-thermal-budget synthesis of monolayer MoS2

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Science China materials 2024年第1期67卷 372-374页

作者： Zongmeng Yang Shibo Fang Jing Lu State key laboratory for Mesoscopic Physics and School of Physics Peking University Collaborative Innovation Center of Quantum Matter Beijing key laboratory for Magnetoelectric materials and devices (BKL-MEMD) Peking University Peking University Yangtze Delta Institute of optoelectronics key laboratory for the Physics and Chemistry of Nanodevices Peking University Beijing key laboratory of Quantum devices Peking University

Two-dimensional (2D) materials, such as MoS2, have been considered as a competitive coordinate for future electronics due to their excellent electrostatics and high mobility [1–3]. Moreover, the potential integration of 2D materials with silicon circuits can present increased density and multifunction in future heterogeneously integrated circuits [4,5]. However, the high thermal-budget during Mo S2 synthesis exceeds the temperature requirement of direct integration with Si in the back-end-of-line (BEOL) fabrication process [6–8].

关键词： FILMS

Phase-locked single-mode terahertz quantum cascade lasers array

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Journal of Semiconductors 2024年第6期45卷 87-91页

作者： Yunfei Xu Weijiang Li Yu Ma Quanyong Lu Jinchuan Zhang Shenqiang Zhai Ning Zhuo Junqi Liu Shuman Liu Fengmin Cheng Lijun Wang Fengqi Liu key laboratory of Semiconductor materials Science Institute of SemiconductorsChinese Academy of SciencesBeijing Key Laboratory of Low Dimensional Semiconductor Materials and DevicesBeijing100083China Center of materials Science and optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China Division of Quantum materials and devices Beijing Academy of Quantum Information SciencesBeijing 100193China

We demonstrated a scheme of phase-locked terahertz quantum cascade lasers(THz QCLs)array,with a single-mode pulse power of 108 mW at 13 K.The device utilizes a Talbot cavity to achieve phase locking among five ridge lasers with first-order buried distributed feedback(DFB)grating,resulting in nearly five times amplification of the single-mode power.Due to the optimum length of Talbot cavity depends on wavelength,the combination of Talbot cavity with the DFB grating leads to better power amplification than the combination with multimode Fabry-Perot(F-P)cavities.The Talbot cavity facet reflects light back to the ridge array direction and achieves self-imaging in the array,enabling phase-locked operation of ridges.We set the spacing between adjacent elements to be 220μm,much larger than the free-space wavelength,ensuring the operation of the fundamental supermode throughout the laser's dynamic range and obtaining a high-brightness far-field distribution.This scheme provides a new approach for enhancing the single-mode power of THz QCLs.

关键词： quantum cascade lasers phase locking terahertz single mode

In situ protonation in a locally flexible porous coordination polymer for enhancing proton-carrier loading and proton conductivity

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Science China Chemistry 2024年

作者： Xianzhe Wei Jincheng Liu Yan Su Weitao Wang Guixiang Wang Gen Zhang Ping Wang Cheng Gu State key laboratory of Luminescent materials and devices Institute of Polymer Optoelectronic Materials and Devices South China University of Technology College of Polymer Science and Engineering State Key Laboratory of Polymer Materials Engineering Sichuan University key laboratory for Soft Chemistry and Functional materials of Ministry of Education School of Chemistry and Chemical EngineeringNanjing University of Science and Technology

Designing efficient proton-conductive materials is crucial in fuel cells. Yet, it remains a substantial challenge because of the issues in proton mobility, proton-carrier amount, and orientation of proton host materials. Herein, we report an in-situ protonation strategy to produce a locally flexible porous coordination polymer(PCP) to enhance the proton-carrier loading and proton conductivity. The local dipole flipping of the ligand allows effective proton exchange with low activation energy, promoting interpore proton transport through the pore apertures and pore walls. The protonation induces substantial charges to the frameworks and enhances the interaction with proton carriers, thereby increasing the loading of the proton carriers. By this design strategy, the resulting PCP exhibits enhanced phosphoric acid loading and extraordinary proton conductivities under both aqueous and anhydrous conditions compared to its isoreticular analog that features rigidity without proton-exchange capability.Our work provides a new avenue for designing proton-conductive materials that combine structural dynamics with performance merits.

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Dilute Aqueous-Aprotic Electrolyte Towards Robust Zn-Ion Hybrid Supercapacitor with High Operation Voltage and Long Lifespan

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Nano-Micro Letters 2024年第9期16卷 1-12页

作者： Shuilin Wu Yibing Yang Mingzi Sun Tian Zhang Shaozhuan Huang Daohong Zhang Bolong Huang Pengfei Wang Wenjun Zhang key laboratory of Catalysis and Energy materials Chemistry of Ministry of Education&Hubei key laboratory of Catalysis and materials Science South-Central Minzu UniversityWuhan 430074People’s Republic of China Department of materials Science and Engineering and Center of Super‑Diamond and Advanced FilmsCity University of Hong Kong83 Tat Chee AvenueKowloon TongHong Kong SARPeople’s Republic of China Department of Applied Biology and Chemical Technology The Hong Kong Polytechnic UniversityHung HomKowloonHong Kong SARPeople’s Republic of China key laboratory of Photochemical Conversion and optoelectronic materials Technical Institute of Physics and ChemistryChinese Academy of SciencesBeijingPeople’s Republic of China

With the merits of the high energy density of batteries and power density of supercapacitors,the aqueous Zn-ion hybrid supercapacitors emerge as a promising candidate for applications where both rapid energy delivery and moderate energy storage are required.However,the narrow electrochemical window of aqueous electrolytes induces severe side reactions on the Zn metal anode and shortens its lifespan.It also limits the operation voltage and energy density of the Zn-ion hybrid supercapacitors.Using'water in salt'electrolytes can effectively broaden their electrochemical windows,but this is at the expense of high cost,low ionic conductivity,and narrow temperature compatibility,compromising the electrochemical performance of the Zn-ion hybrid supercapacitors.Thus,designing a new electrolyte to balance these factors towards high-performance Zn-ion hybrid supercapacitors is urgent and necessary.We developed a dilute water/acetonitrile electrolyte(0.5 m Zn(CF_(3)SO_(3))_(2)+1 m LiTFSI-H_(2)O/AN)for Zn-ion hybrid supercapacitors,which simultaneously exhibited expanded electrochemical window,decent ionic conductivity,and broad temperature compatibility.In this electrolyte,the hydration shells and hydrogen bonds are significantly modulated by the acetonitrile and TFSI-anions.As a result,a Zn-ion hybrid supercapacitor with such an electrolyte demonstrates a high operating voltage up to 2.2 V and long lifespan beyond 120,000 cycles.

关键词： Zn-ion supercapacitors Zn metal anode Electrolyte engineering Hydrogen bonds Solvation structures

Efficient energy transfer from self-trapped excitons to Mn^(2+) dopants in CsCdCl_(3):Mn^(2+) perovskite nanocrystals

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International Journal of Minerals,Metallurgy and materials 2024年第6期31卷 1456-1461页

作者： Anran Zhang Xinquan Zhou Ranran Gu Zhiguo Xia State key laboratory of Luminescent materials and devices Guangdong Provincial Key Laboratory of Fiber Laser Materials and Applied TechniquesSchool of Materials Science and EngineeringSouth China University of TechnologyGuangzhou 510641China School of Physics and optoelectronics South China University of TechnologyGuangzhou 510641China

Mn^(2+)doping has been adopted as an efficient approach to regulating the luminescence properties of halide perovskite nano-crystals(NCs).However,it is still difficult to understand the interplay of Mn^(2+)luminescence and the matrix self-trapped exciton(STE)emission therein.In this study,Mn^(2+)-doped CsCdCl_(3) NCs are prepared by hot injection,in which CsCdCl_(3) is selected because of its unique crystal structure suitable for STE emission.The blue emission at 441 nm of undoped CsCdCl_(3) NCs originates from the defect states in the NCs.Mn^(2+)doping promotes lattice distortion of CsCdCl_(3) and generates bright orange-red light emission at 656 nm.The en-ergy transfer from the STEs of CsCdCl_(3) to the excited levels of the Mn^(2+)ion is confirmed to be a significant factor in achieving efficient luminescence in CsCdCl_(3):Mn^(2+)NCs.This work highlights the crucial role of energy transfer from STEs to Mn^(2+)dopants in Mn^(2+)-doped halide NCs and lays the groundwork for modifying the luminescence of other metal halide perovskite NCs.

关键词： perovskite nanocrystals self-trapped excitons luminescence energy transfer

Stable ultraviolet ultrafast laser based on all-polarizationmaintaining fiber femtosecond laser

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Chinese Optics Letters 2024年第3期22卷 76-82页

作者：田昊朱喆林巍李子豪温俊鹏修昊范怡衡韦池一韦小明杨中民 School of Physics and optoelectronics/State key laboratory of Luminescent materials and devices Guangdong Engineering Technology Research and Development Center of Special Optical Fiber Materials and DevicesGuangdong Provincial Key Laboratory of Fiber Laser Materials and Applied TechniquesSouth China University of TechnologyGuangzhou 510640China Research Institute of Future Technology South China Normal UniversityGuangzhou 510006China

We report a high-stability ultrafast ultraviolet(UV)laser source at 352 nm by exploring an all-fiber,all-polarizationmaintaining(all-PM),Yb-doped femtosecond fiber laser at 1060 nm.The output power,pulse width,and optical spectrum width of the fiber laser are 6 W,244 fs,and 17.5 nm,respectively.The UV ultrashort pulses at a repetition rate of 28.9 MHz are generated by leveraging single-pass second-harmonic generation in a 1.3-mm-long BiB_(3)O_(6)(BIBO)and sum frequency generation in a 5.1-mm-long BIBO.The maximum UV output power is 596 mW.The root mean square error of the output power of UV pulses is 0.54%.This laser,with promising stability,is expected to be a nice source for frontier applications in the UV wavelength window.

关键词： all-polarization-maintaining fiber ultrafast fiber laser UV laser