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Review on Metallization Approaches for High-Efficiency Silicon Heterojunction Solar Cells

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Transactions of Tianjin University 2022年第5期28卷 358-373页

作者： Yulian Zeng chen-wei peng wei Hong Shan Wang Cao Yu Shuai Zou Xiaodong Su School of Physical Science and Technology Jiangsu Key Laboratory of Thin FilmsSoochow UniversitySuzhou 215006China Suzhou Maxwell Technologies Co. Ltd.Suzhou 215200China Suzhou Isilver Materials Co. Ltd.Suzhou 215129China

Crystalline silicon(c-Si)heterojunction(HJT)solar cells are one of the promising technologies for next-generation industrial high-efficiency silicon solar cells,and many efforts in transferring this technology to high-volume manufacturing in the photovoltaic(PV)industry are currently *** is of vital importance to the PV performance and long-term reliability of HJT solar *** this review,we summarize the development status of metallization approaches for highefficiency HJT solar *** conventional screen printing technology,to avoid the degradation of the passivation properties of the amorphous silicon layer,a low-temperature-cured(<250℃)paste and process are *** process,in turn,leads to high line/contact resistances and high paste *** improve the conductivity of electrodes and reduce the metallization cost,multi-busbar,fine-line printing,and low-temperature-cured silver-coated copper pastes have been *** addition,several potential metallization technologies for HJT solar cells,such as the Smart Wire Contacting Technology,pattern transfer printing,inkjet/FlexTrailprinting,and copper electroplating,are discussed in detail.B ased on the summary,the potential and challenges of these metallization technologies for HJT solar cells are analyzed.

关键词： Silicon solar cells Passivating-contact Heterojunction Metallization Electrode

A six-variable quasi-3D isogeometric approach for free vibration of functionally graded graphene origami-enabled auxetic metamaterial plates submerged in a fluid medium

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Applied Mathematics and Mechanics(English Edition) 2025年第1期46卷 157-176页

作者： wei chen Zhihong TANG Yufen LIAO Linxin peng College of Civil Engineering University of South China College of Civil Engineering and Architecture Guangxi University Key Laboratory of Disaster Prevention and Structural Safety of Ministry of Education Guangxi University

This paper presents, for the first time, an effective numerical approach based on the isogeometric analysis(IGA) and the six-variable quasi-three dimensional(3D)higher-order shear deformation theory(HSDT) to study the free vibration characteristics of functionally-graded(FG) graphene origami(GOri)-enabled auxetic metamaterial(GOEAM) plates submerged in a fluid medium. The plate theory incorporates the thickness stretching and the effects of transverse shear deformation without using any shear correction factors. The velocity potential function and Bernoulli's equation are used to derive the hydrodynamic pressure acting on the plate surface. Both horizontally and vertically immersed plate configurations are considered here in the form of inertia *** plates are composed of multilayer GOEAMs, with the GOri content varying through the plate's thickness in a layer-wise manner. This design results in graded auxetic *** material properties are evaluated by mixing rules and a genetic programming(GP)-assisted micromechanical model. The governing equations of motion for the FG-GOEAM plates immersed in a fluid medium are derived by Hamilton's principle. After validating the convergence and accuracy of the present model, a comprehensive parametric study is carried out to examine the effects of the GOri content, GOri distribution pattern, GOri folding degree, fluid level, immersed depth, and geometric parameter on the natural frequencies of the FG-GOEAM plates. The results show that the natural frequencies for the four GOri distribution patterns increase with the increase in the layer number when the lay number is fewer than 10, and then stabilize after the layer number reaches ***, in general, the natural frequency of the FG-GOEAM plate in a vacuum or fluid increases when the GOri content increases, while decreases when the GOri folding degree increases. Some additional findings related to the numerical results are presented in the conclusions. It is belie

关键词： free vibration functionally-graded (FG) graphene origami (GOri)-enabled auxetic metamaterial (GOEAM) plate hydrodynamic pressure isogeometric analysis (IGA) O321 quasi-three dimensional (3D) higher-order shear deformation theory (HSDT)

PINN for solving forward and inverse problems involving integrable two-dimensional nonlocal equations

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Communications in Theoretical Physics 2025年第2期77卷 15-22页

作者： Xi chen wei-Qi peng School of Mathematics China University of Mining and Technology School of Mathematical Sciences Ocean University of China

In this paper, the physics informed neural network(PINN) deep learning method is applied to solve two-dimensional nonlocal equations, including the partial reverse space y-nonlocal Mel'nikov equation, the partial reverse space-time nonlocal Mel'nikov equation and the nonlocal twodimensional nonlinear Schr?dinger(NLS) equation. By the PINN method, we successfully derive a data-driven two soliton solution, lump solution and rogue wave solution. Numerical simulation results indicate that the error range between the data-driven solution and the exact solution is relatively small, which verifies the effectiveness of the PINN deep learning method for solving high dimensional nonlocal equations. Moreover, the parameter discovery of the partial reverse space-time nonlocal Mel'nikov equation is analysed in terms of its soliton solution for the first time.

关键词： two dimensional nonlocal equations PINN soliton solution rogue wave inverse problems

Noninfectious Fever Following Aortic Surgery:Incidence,Risk Factors,and Outcomes

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Chinese Medical Sciences Journal 2009年第4期24卷 213-219页

作者： Yun-tai Yao Li-huan Li Qian Lei Lei chen wei-peng Wang wei-ping chen Department of Anesthesiology Fuwai Cardiovascular Hospital Chinese Academy of Medical Sciences ＆ Peking Union Medical College Beijing 100037 China

Objective To determine the incidence, course, potential risk factors, and outcomes of noninfectious fever developed in patients after aortic surgery. Methods Patients who received operation for aortic aneurysm or dissection in our center from January 2006 to January 2008 were reviewed. Patients who met one of the following criteria were excluded： having a known source of infection during hospitalization; having a preoperative oral temperature greater than or equal to 38.0℃; undertaking emergency surgery; having incomplete data. Univariate analysis was performed in patients with noninfectious postoperative fever and those without, with respect to demographics, intraoperative data, etc. Risk factors for postoperative fever were considered for the muhivariate logistic regression model if they had a P value less than 0.10 in the univariate analysis. Results Totally 463 patients undergoing aortic surgery were enrolled for full review. Among them, 345 （74.5%） patients had noninfectious postoperative fever, the other 118 （25.5%） patients didn＇t develop postoperative fever. Univariate analysis demonstrated that several risk factors were associated with the development of noninfectious postoperative fever, including weight, surgical procedure, minimum intraoperative bladder temperature, temperature upon intensive care unit （ICU） admission, discharge, and during ICU stay, as well as blood transfusion. In a further multivariate analysis, surgical site of thoracic and thoracoabdominal aorta （odds ratio： 4.861; 95% confidence interval： 3.029-5.801; P=0.004）, lower minimum intraoperative bladder temperature （odds ratio： 1.117; 95% confidence interval： 1.01-1.24; P=0.04）, and higher temperature on admission to the ICU （odds ratio： 2.57; 95% confidence interval： 1.28-5.18; P=0.008） were found to be significant predictors for noninfectious postoperative fever. No difference was found between the febrile and afebrile patients with regard to postoperative hospitalization duration （P

关键词： fever noninfectious aortic surgery

Improving the UV-light stability of silicon heterojunction solar cells through plasmon-enhanced luminescence downshifting of YVO_(4):Eu^(3+),Bi^(3+)nanophosphors decorated with Ag nanoparticles

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Journal of Energy Chemistry 2023年第6期81卷 212-220,I0007页

作者： cheng-Kun Wu Shuai Zou chen-wei peng Si-wei Gu Meng-Fei Ni Yu-Lian Zeng Hua Sun Xiao-Hong Zhang Xiao-Dong Su School of Physical Science and Technology and Jiangsu Key Laboratory of Thin FilmsSoochow UniversitySuzhou 215006JiangsuChina Institute of Functional Nano&Soft Materials(FUNSOM) Soochow UniversitySuzhou 215123JiangsuChina

The ultraviolet(UV)light stability of silicon heterojunction(SHJ)solar cells should be addressed before large-scale production and *** downshifting(DS)nanophosphors on top of solar cells that can convert UV light to visible light may reduce UV-induced degradation(UVID)without sacrificing the power conversion efficiency(PCE).Herein,a novel composite DS nanomaterial composed of YVO_(4):Eu^(3+),Bi^(3+)nanoparticles(NPs)and AgNPs was synthesized and introduced onto the incident light side of industrial SHJ solar cells to achieve UV *** YVO_(4):Eu^(3+),Bi^(3+)NPs and Ag NPs were synthesized via a sol-gel method and a wet chemical reduction method,***,a composite structure of the YVO_(4):Eu^(3+),Bi^(3+)NPs decorated with Ag NPs was synthesized by an ultrasonic *** emission intensities of the YVO_(4):Eu^(3+),Bi^(3+)nanophosphors were significantly enhanced upon decoration with an appropriate amount of~20 nm Ag NPs due to the localized surface plasmon resonance(LSPR)*** the introduction of LSPR-enhanced downshifting,the SHJ solar cells exhibited an~0.54%relative decrease in PCE degradation under UV irradiation with a cumulative dose of 45 k W h compared to their counterparts,suggesting excellent potential for application in UV-light stability enhancement of solar cells or modules.

关键词： Downshifting Silver nanoparticles Localized surface plasmon resonance UV-light stability Silicon heterojunction solar cells

OFDR Based Distributed Temperature Sensor Using the Three-Channel Simultaneous Radio-Frequency Lock-ln Technique

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Photonic Sensors 2015年第3期5卷 217-223页

作者： Ke chen Xinlei ZHOU wei peng Qingxu YU School of Physics and Optoelectronic Technology Dalian University of Technology Dalian 116023 China

Weak signal detection for single-mode fiber-optic distributed temperature sensor （DTS） is a key technology to achieve better performance. A hybrid technique combining the incoherent optical frequency domain reflectometry （IOFDR） and the three-channel simultaneous radio-frequency （RF） lock-in amplifier （LIA） is presented to improve the signal-to-noise ratio （SNR） of the measured spontaneous Raman backscattered light. The field programmable gate array （FPGA） based RF-LIA is designed with a novel and simple structure. The measurement frequency range is achieved from 1 kHz to 100 MHz. Experimental results show that the backscattered light signal of picowatt level can be detected with high SNR. With a 2.5kin single-mode fiber, a 1064nm laser source, and the measurement time of 500 s, this sensing system can reach a spatial resolution of 0.93 m and a temperature resolution of about 0.2℃.

关键词： Distributed temperature sensor incoherent optical frequency domain reflectometry radio-frequency lock-in amplifier simultaneous detection

Detection and interpretation of the time-varying seasonal signals in China with multi-geodetic measurements

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Geodesy and Geodynamics 2025年第1期16卷 42-54页

作者： Liansheng Deng Yugang Xiao Qusen chen wei peng Zhao Li Hua chen Zhiwen Wu School of Electrical and Electronic Information Engineering Hubei Polytechnic University Hubei Luojia Laboratory GNSS Research Center Wuhan University Changjiang Spatial Information Technology Engineering Co. Ltd. Key Laboratory of Spatial Data Mining & Information Sharing of the Ministry of Education Fuzhou University School of Geodesy and Geomatics Wuhan University The First Surveying and Mapping Institute of Hunan Province

The time-varying periodic variations in Global Navigation Satellite System(GNSS) stations affect the reliable time series analysis and appropriate geophysical interpretation. In this study, we apply the singular spectrum analysis(SSA) method to characterize and interpret the periodic patterns of GNSS deformations in China using multiple geodetic datasets. These include 23-year observations from the Crustal Movement Observation Network of China(CMONOC), displacements inferred from the Gravity Recovery and Climate Experiment(GRACE), and loadings derived from Geophysical models(GM). The results reveal that all CMONOC time series exhibit seasonal signals characterized by amplitude and phase modulations, and the SSA method outperforms the traditional least squares fitting(LSF) method in extracting and interpreting the time-varying seasonal signals from the original time series. The decrease in the root mean square(RMS) correlates well with the annual cycle variance estimated by the SSA method, and the average reduction in noise amplitudes is nearly twice as much for SSA filtered results compared with those from the LSF method. With SSA analysis,the time-varying seasonal signals for all the selected stations can be identified in the reconstructed components corresponding to the first ten eigenvalues. Moreover, both RMS reduction and correlation analysis imply the advantages of GRACE solutions in explaining the GNSS periodic variations,and the geophysical effects can account for 71% of the GNSS annual amplitudes, and the average RMS reduction is 15%. The SSA method has proved to be useful for investigating the GNSS timevarying seasonal signals. It could be applicable as an auxiliary tool in the improvement of nonlinear variations investigations.

关键词： GNSS coordinate time series Singular spectrum analysis Time-varying seasonal signals Loading effects GRACE

Salient structural elements based texture synthesis

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Science China(Information Sciences) 2011年第6期54卷 1199-1206页

作者： PAN Bin , ZHONG Fan, WANG Shuai, chen wei & peng QunSheng The State Key Lab of CAD & CG, Hangzhou 310027, China The State Key Lab of CAD & CG Hangzhou China

Salient structural elements are ubiquitous in natural textures, and their distribution exhibits some stochastic distribution features. Current texture synthesis algorithms can neither preserve the integrity of the elements nor capture this distributive information. We present an algorithm to treat this high-level visual information. Here, we address the issue by taking specific care of the structural elements. Our texture synthesis process grows the target texture one structural element at a time. A Markov random field model is assumed for the distribution of the salient structural elements. In the analysis process, the salient structural elements are first extracted, and their topological relationship is constructed. Next, in the synthesis process, to identify an unknown element with neighbors synthesized, we query the sample texture and find the most similar neighbor. The randomness of the target texture can be improved by randomly transforming the structural elements. Experimentation shows that our results pass scrutiny by the high-level visual processing of humans.

关键词： salient structural elements random transformation visual perception

Insights into the seasonal characteristics of single particle aerosols in chengdu based on SPAMS

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Journal of Environmental Sciences 2025年第3期149卷 431-443页

作者： Junke Zhang Yunfei Su Chunying chen Xinyi Fu Yuhan Long Xiaoxue peng Xiaojuan Huang Gehui Wang wei Zhang Faculty of Geosciences and Environmental Engineering Southwest Jiaotong UniversityChengdu 611756China Department of Environmental Science&Engineering Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention(LAP3)Fudan UniversityShanghai 200438China Key Lab of Geographic Information Science of the Ministry of Education School of Geographic SciencesEast China Normal UniversityShanghai 200241China Sichuan Ecological Environment Monitoring Station Chengdu 610091China

To investigate the seasonal characteristics in air pollution in chengdu,a single particle aerosol mass spectrometry was used to continuously observe atmospheric fine particulate matter during one-month periods in summer and winter,*** results showed that,apart from O_(3),the concentrations of other pollutants(CO,NO_(2),SO_(2),PM_(2.5)and PM_(10))were significantly higher in winter than in *** single particle aerosols were divided into seven categories:biomass burning(BB),coal combustion(CC),Dust,vehicle emission(VE),K mixedwith nitrate(K-NO_(3)),Kmixed with sulfate and nitrate(K-SN),and K mixedwith sulfate(K-SO_(4))*** highest contributions in both seasons were VE particles(24%).The higher contributions of K-SO_(4)(16%)and K-NO_(3)(10%)particles occurred in summer and winter,respectively,as a result of their different formation mechanisms.S-containing(KSO_(4)and K-SN),VE,and BB particles caused the evolution of pollution in both seasons,and they can be considered as targets for future pollution *** mixing of primary sources particles(VE,Dust,CC,and BB)with secondary components was stronger in winter than in *** summer,as pollution worsens,the mixing of primary sources particles with 62[NO_(3)]−weakened,but themixing with 97[HSO_(4)]−***,in winter,the mixing state of particles did not exhibit an obvious evolution *** potential source areas in summer were mainly distributed in the southern region of Sichuan,while in winter,besides the southern region,the contribution of the western region cannot be ignored.

关键词： Single particle aerosols Chemical composition Mixing state Regional transport Seasonal characteristics