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High sensitivity SPR refractive index sensor with high resolution based on anti-resonance fiber

optoelectronics Letters 2022年第4期18卷 204-209页

作者： ZHANG Ailing LI Yueting PAN Fei PAN Honggang LIU Fei Engineering Research Center of Optoelectronic Devices&Communication Technology Ministry of EducationTianjin Key Laboratory of Film Electronic and Communication DevicesSchool of Integrated Circuit Science and EngineeringTianjin University of TechnologyTianjin 300384China

We proposed a surface plasmon resonance(SPR)refractive index sensor based on hollow-core anti-resonance fiber(HC-ARF).Gold was filled in two symmetric cladding tubes of the fiber,while the analyte was filled in central air *** sensing performance was investigated by the finite element method(FEM).Results show that two resonance peaks(a crossing point around 1030 nm and an anti-crossing region around 1065 nm)appear for x-polarization(x-pol)core mode coupling with the surface plasmon polariton(SPP)***,the sensitivity was also *** sensitivity increased with the increase of cladding tube thickness *** sensor with thickness t=1.7μm gave a wavelength sensitivity of 7350—14790 nm/RIU in the refractive index range of 1.33—1.45 with resonance wavelength from 1900 nm to 450 ***,the resolution of 10^(-6) RIU was *** to high sensitivity and resolution,the proposed sensor has potential applications in glucose detection.

关键词： fiber polarization refractive

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Donor-Acceptor Copolymers with Rationally Regulated Side Chain Orientation for Polymer Solar Cells Processed by Non-Halogenated Solvent

Organic Materials

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Organic Materials 2022年第2期4卷 18-27页

作者： Hu, Zhengwei Huang, Qiri Liu, Chunchen Song, Ao Shao, Lin Bai, Yuanqing Hu, Zhicheng Zhang, Kai Huang, Fei Cao, Yong Institute of Polymer Optoelectronic Materials and Devices State Key Laboratory of Luminescent Materials and Devices South China University of Technology Guangzhou 510640 China

A donor acceptor (D-A) conjugated polymer PBTFO-T-1 consisting of 2,1,3-benzothiadiazole (BT) as A unit and thiophene (T) as D unit was facilely obtained by a straightforward three-step reaction. The BT unit is attached with a fluorine atom and an alkoxy chain to simultaneously endow the polymer with a deep HOMO energy level and desirable solubility. The alkoxyl chain orientation on the BT unit has been regulated and the polymer PBTFO-T-2 with regio-regularly oriented side chains was also developed to investigate the impact of the alkoxyl chain orientation on their optoelectronic properties. The PBTFO-T-1:Y6-BO polymer solar cells (PSCs) were processed with a non-halogenated solvent and achieved an optimized power conversion efficiency of 14.16%, significantly higher than 9.39% of the PBTFO-T-2:Y6-BO counterpart. It has been demonstrated that the PBTFO-T-1:Y6-BO film exhibits higher and more balanced charge transportation and superior film morphology, resulting in higher exciton generation and dissociation, less recombination and eventually the higher short-circuit current density (Jsc) and fill factor. This study provides a possible strategy to develop polymer donors with low cost for future commercial applications of PSCs and gives some insights into regulating optoelectronic properties of polymer donors via rationally modifying their side chain orientation. © 2022. The Author(s).

关键词： non-halogenated solvent polymer donor regio-regular orientation

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Heterointerface Engineering-Induced Oxygen Defects for the Manganese Dissolution Inhibition in Aqueous Zinc Ion Batteries

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Energy & Environmental Materials 2024年第3期7卷 112-122页

作者： Wentao Qu Yong Cai Baohui Chen Ming Zhang Hunan Provincial Key Laboratory of Low-Dimensional Structural Physics&Devices School of Physics and ElectronicsHunan UniversityChangsha 410082China Engineering Research Center of Advanced Semiconductor Technology and Application of Ministry of Education&Key Laboratory for Micro-/Nano-Optoelectronic Devices of Ministry of Education College of Semiconductors(College of Integrated Circuits)Hunan UniversityChangsha 410082China Changsha Semiconductor Technology and Application Innovation Research Institute College of Semiconductors(College of Integrated Circuits)Hunan UniversityChangsha 410082China State Key Laboratory of Disaster Prevention&Reduction for Power Grid Transmission and Distribution Equipment(Hunan Electric Power Corporation Disaster Prevention and Reduction Center) Changsha 410007China

Manganese-based material is a prospective cathode material for aqueous zinc ion batteries(ZIBs)by virtue of its high theoretical capacity,high operating voltage,and low ***,the manganese dissolution during the electrochemical reaction causes its electrochemical cycling stability to be *** this work,heterointerface engineering-induced oxygen defects are introduced into heterostructure MnO_(2)(δa-MnO_(2))by in situ electrochemical activation to inhibit manganese dissolution for aqueous zinc ion ***,the heterointerface between the disordered amorphous and the crystalline MnO_(2)ofδa-MnO_(2)is decisive for the formation of oxygen *** the experimental results indicate that the manganese dissolution ofδa-MnO_(2)is considerably inhibited during the charge/discharge *** analysis indicates that the oxygen defect regulates the electronic and band structure and the Mn-O bonding state of the electrode material,thereby promoting electron transport kinetics as well as inhibiting Mn ***,the capacity ofδa-MnO_(2)does not degrade after 100 cycles at a current density of 0.5 Ag^(-1)and also 91%capacity retention after 500cycles at 1 Ag^(-1).This study provides a promising insight into the development of high-performance manganese-based cathode materials through a facile and low-cost strategy.

关键词： electrochemical activation heterointerface manganese dissolution inhibition oxygen defects zinc ion batteries

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Improved performance of visible-light photocatalytic H_(2)-production and Cr(Ⅵ) reduction by waste pigeon guano doped g-C_(3)N_(4) nanosheets

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Journal of Materials Science & technology 2023年第21期152卷 37-49页

作者： Yangli Ke Qingliang You Jing Ai Xiaofang Yang Qigao Shang Yanyang Liu Dongsheng Wang Guiying Liao Faculty of Materials Science and Chemistry China University of GeosciencesHubei 430074China Key Laboratory of Optoelectronic Chemical Materials and Devices Ministry of EducationSchool of Optoelectronic Materials and TechnologyJianghan UniversityWuhan 430056China Hubei Key Laboratory of Yangtze Catchment Environmental Aquatic Science School of Environmental StudiesChina University of GeosciencesWuhan 430074China State Key Laboratory of Environmental Aquatic Chemistry Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China College of Environmental and Resource Sciences Zhejiang UniversityHangzhou 310058China

In this study,waste pigeon guano(PG)was re-utilized as an ideal biomass adulterant to improve the photocatalytic activity of the pristine graphitic carbon nitride(g-C_(3)N_(4)).Waste PG and melamine were employed as precursors to fabricate a novel porous multielement-doped g-C_(3)N_(4)(CN-PG-S)nanosheets photocatalyst via in situ thermal polycondensation coupled with thermal exfoliation *** CN-PG-S owned abundant uniformly porous structures,superior conductivity,and excellent photocatalytic abilities,resulting in highly-efficient H_(2)-production(1950μmol g^(–1) h^(–1))and Cr(Ⅵ)reduction(99.1%)un-der visible light,which increased by 22.9-folds and 5.3-folds more than that of pristine g-C_(3)N_(4).The non-metallic(P,S,and O)and metallic elements in CN-PG-S played a crucial role in expanding the visible-light absorption range and promoting the separation-migration of photogenerated electron-hole *** the uniformly porous nanosheet structure of CN-PG-S shortens the diffusion paths of photogenerated carri-ers and exposes more active sites for photocatalytic *** study proposed an eco-friendly re-sources integration strategy of waste PG to prepare excellent CN-PG-S photocatalysts for highly-efficient H_(2)-production and Cr(VI)reduction.

关键词： Pigeon guano(PG)doping g-C_(3)N_(4)nanosheets Photocatalyst H_(2)-production Cr(Ⅵ)reduction

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Quantum Hydrodynamics of Fractonic Superfluids with Lineon Condensate:From Navier-Stokes-Like Equations to Landau-Like Criterion

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Chinese Physics Letters 2022年第5期39卷 58-62页

作者： Jian-Keng Yuan Shuai A.Chen Peng Ye School of Physics State Key Laboratory of Optoelectronic Materials and Technologiesand Guangdong Provincial Key Laboratory of Magnetoelectric Physics and DevicesSun Yat-sen UniversityGuangzhou 510275China Department of Physics The Hong Kong University of Science and TechnologyHong KongChina

Fractonic superfluids are exotic states of matter with spontaneously broken higher-rank U(1)*** broken symmetry is associated with conserved quantities,including not only particle number(i.e.,charge)but also higher moments,such as dipoles,quadrupoles,and angular *** to the presence of such conserved quantities,the mobility of particles is restricted either completely or ***,we systematically study the hydrodynamical properties of fractonic superfluids,especially focusing on the fractonic superfluids with conserved angular *** constituent bosons are called"lineons"with d components in d-dimensional *** the Euler-Lagrange equation,we derive the continuity equation and Navier-Stokes-like equations,in which the angular moment conservation introduces extra ***,we discuss the current configurations related to the *** the conventional superfluid,we study the critical values of velocity fields and density currents,which gives rise to a Landau-like ***,several future directions are discussed.

关键词： Navier Landau angular

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Nonlocal interaction enhanced biexciton emission in large CsPbBr_(3) nanocrystals

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eLight 2023年第1期3卷 169-176页

作者： Peng Huang Shipei Sun Hairui Lei Yongyou Zhang Haiyan Qin Haizheng Zhong MIIT Key Laboratory for Low‑Dimensional Quantum Structure and Devices School of Materials Science&EngineeringBeijing Institute of TechnologyBeijing 100081China Beijing Key Laboratory of Nanophotonics and Ultrafine Optoelectronic Systems School of PhysicsBeijing Institute of TechnologyBeijing 100081China Key Laboratory of Excited‑State Materials of Zhejiang Province Department of ChemistryZhejiang UniversityHangzhou 310027China

Biexciton emission in quantum dots is an efficient way to generate entangled photon pairs,which are key resources in quantum *** with epitaxial grown quantum dots,chemically synthesized colloidal quantum dots show advantages of tunable wavelength and easy integration to realize quantum light ***,biexciton efficiency of colloidal quantum dots has been limited by Auger *** this paper,we reported nonlocal interaction enhanced biexciton emission with efficiency up to 80% in large perovskite nanocrystals(>20 nm).The nonlocal interaction between carriers and excitons leads to the abnormal exponential decrease of Auger recombination with volume in large nanocrystals,which distinguishes with the linear scaling in small *** an exponential decrease of Auger recombination results in long lifetime of biexcitons,responsible for the required high biexciton *** discovery of nonlocal effects in large semiconductor nanocrystals provides new strategies to achieve high efficiency multiple excitons for quantum optics and energy conversation applications.

关键词： quantum interaction exponential

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Band alignment and interlayer hybridization in monolayer organic/WSe_(2) heterojunction

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Nano Research 2022年第2期15卷 1276-1281页

作者： Yanping Guo Linlu Wu Jinghao Deng Linwei Zhou Wei Jiang Shuangzan Lu Da Huo Jiamin Ji Yusong Bai Xiaoyu Lin Shunping Zhang Hongxing Xu Wei Ji Chendong Zhang Key Laboratory of Artificial Micro-and Nano-structures of Ministry of Education and School of Physics and Technology Wuhan UniversityWuhan 430027China Department of Physics and Beijing Key Laboratory of Optoelectronic Functional Materials and Micro-Nano Devices Renmin University oj ChinaBeijing 100872China

Semiconducting heterojunctions(HJs),comprised of atomically thin transition metal dichalcogenides(TMDs),have shown great potentials in electronic and optoelectronic ***/TMD hybrid bilayers hold enhanced pumping efficiency of interfacial excitons,tunable electronic structures and optical properties,and other superior advantages to these inorganic ***,we report a direct probe of the interfacial electronic structures of a crystalline monolayer(ML)perylene-3,4,9,10-tetracarboxylic-dianhydride(PTCDA)/ML-WSe_(2) HJ using scanning tunneling microscopy,photoluminescence,and first-principle *** PTCDAAA/Se_(2) interfacial interactions lead to appreciable hybridization of the WSe_(2) conduction band with PTCDA unoccupied states,accompanying with a significant amount of PTCDA-to-WSe_(2) charge transfer(by 0.06 e/PTCDA).A type-ll band alignment was directly determined with a valence band offset of-1.69 eV,and an apparent conduction band offset of-1.57 ***,we found that the local stacking geometry at the HJ interface differentiates the hybridized interfacial states.

关键词： two-dimensional materials organic/transition metal dichalcogenide(TMD)heterojunction interlayer hybridization band diagram

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Scoliosis detection method based on fringe projection profilometry and deep learning

Scoliosis detection method based on fringe projection profil...

引用

2024 International Conference on Optical and Photonic Engineering, icOPEN 2024

作者： Wang, Meng He, Dong Xu, Shaolei Tang, Qijian Peng, Xiang Liu, Xiaoli State Key Laboratory of Radio Frequency Heterogeneous Integration College of Physics and Optoelectronic Engineering Shenzhen University Guangdong China Key Laboratory of Intelligent Optical Measurement and Detection of Shenzhen Shenzhen Institute of Information Technology Shenzhen Guangdong China School of Sino-German Robotics Shenzhen Institute of Information Technology Shenzhen Guangdong China

ISBN: (数字)9781510688117

ISBN: (纸本)9781510688100

In this paper, a fringe projection profilometry (FPP) system for three-dimensional (3D) imaging of the human back is proposed to assess scoliosis, which has developed into one of the top four health concerns affecting adolescents. The FPP system includes a binocular stereo vision system and an infrared projector, with a Field Programmable Gate Array (FPGA) based synchronization control system enabling a 240Hz acquisition frame rate. This high frame rate mitigates the impact of involuntary body movement on 3D image quality. Various features can be extracted from the generated 3D model of the back for quantitative postural assessment. Specifically, a deep learning approach is employed to analyze the extracted trunk rotation angle curve for scoliosis detection. Experimental results demonstrate a correlation between this method and X-ray detection, offering a promising exploratory approach to reduce reliance on X-ray imaging in scoliosis monitoring. © 2025 SPIE.

关键词： Stereo image processing

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Inner alkyl chain modulation of small molecular acceptors enables molecular packing optimization and efficient organic solar cells

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Science China Chemistry 2023年第2期66卷 500-507页

作者： Yuntong Guo Zhenyu Chen Jinfeng Ge Jinna Zhang Lin Xie Ruixiang Peng Wei Ma Ziyi Ge Zhejiang Engineering Research Center for Energy Optoelectronic Materials and Devices Ningbo Institute of Materials Technology and EngineeringChinese Academy of SciencesNingbo315201China School of Chemical Engineering Zhejiang University of TechnologyHangzhou310014China State Key Laboratory for Mechanical Behavior of Materials Xi’an Jiaotong UniversityXi’an710049China

With the generation of Y6,organic solar cells have reached remarkable achievement of over 19%*** chain is of importance to modulate intermolecular stacking and possibly enhance optoelectronic properties of small molecule acceptors(SMAs).Three alkyl chains of 2-ethylhexyl,2-butylocyl and 3-ethylheptyl were selected to obtain G6-EH,G6-BO and G6-EHep molecules,*** to G6-EH and G6-BO,G6-EHep was found inducing unfavourable large domain ***,we discover that 2-butyloctyl effectively inhibits monomolecular and bimolecular recombination,improves molecular packing,generates more balanced carrier mobility and enhances exciton *** SMA with 2-butyloctyl alkyl chains(G6-BO)shows the best electrical and morphological characteristics,achieving a higher power conversion efficiency(PCE)of 17.06%,with an open circuit voltage of 0.912 V,a short-circuit current of 24.22 m A cm-2and a fill factor of 77.25%.Finally,using the ternary strategy by incorporating the G6-BO acceptor into PM6:BTP-e C9,we achieved a higher PCE of18.13%with enhanced electron transport.

关键词： alkyl chain small molecular acceptors molecular packing ternary strategy

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Thiazole-Flanked Thiazoloisoindigo as a Monomer for Balanced Ambipolar Polymeric Field-effect Transistors

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Chinese Journal of Polymer Science 2022年第10期40卷 1131-1140,I0006页

作者： Si-Yu Lv Qi-Yi Li Bo-Wen Li Jie-Yu Wang You-Bing Mu Liang Li Jian Pei Xiao-Bo Wan Key Laboratory of Optoelectronic Chemical Materials and Devices Ministry of EducationSchool of Optoelectronic Materials&TechnologyJianghan UniversityWuhan 430056China Beijing National Laboratory for Molecular Sciences the Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of EducationCollege of Chemistry and Molecular EngineeringPeking UniversityBeijing 10087iChina School of Materials Science and Engineering Wuhan Institute of TechnologyWuhan 430205China

Electron-rich thiophene-flanked thiazoloisoindigo(Th-TzII)has been reported as a building block for ambipolar polymeric field-effect transistors however with preferable hole ***,we report that by using an electron deficient thiazole as the flanked moiety,the corresponding thiazoloisoindigo(Tz-TzII)can still be synthesized,although in a more sinuous *** calculation and experimental results demonstrate that Tz-TzII is more electron-deficient than Th-TzII,and the corresponding polymer P(TzII-Tz-T-Tz)exhibits high and balanced hole/electron mobility of 0.70/0.64 cm^(2)·V^(-1)·s^(-1).

关键词： Thiazoloisoindigo Ambipolar Polymeric field-effect transistors

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