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Design of advanced porous silver powder with high-sintering activity to improve silicon solar cells

Nano Research 2024年第4期17卷 3189-3197页

作者： Yongsheng Li Ziwei Chen Rui Zhou Wenguang Zhao Mu Li Jun Chen Zhongyuan Huang Jian Liu Yuhang Li Maolin Yang Minghan Yu Dong Zhou Yuan Lin Feng Pan School of Advanced Materials Peking UniversityShenzhen Graduate SchoolShenzhen 518055China Institute of Advanced Science Facilities Shenzhen 518107China Institute of Zhejiang University-Quzhou Quzhou 324000China Key Laboratory of Photochemistry Institute of ChemistryChinese Academy of SciencesBeijing 100190China Institute of Materials Research(IMR) Tsinghua UniversityTsinghua Shenzhen International Graduate SchoolShenzhen 518055China School of Materials Science and Engineering Harbin Institute of Technology(Shenzhen)Shenzhen 518055China

Silver(Ag)paste is widely used in semiconductor metallization,especially in silicon solar *** powder is the material with the highest proportion in Ag *** morphology and structure of Ag powder are crucial which determine its characteristics,especially for the sintering *** this work,a simple method was developed to synthesize a type of microcrystalline spherical Ag particles(SP-A)with internal pores and the structural changes and sintering behavior were thoroughly studied by combining ultra-small-angle X-ray scattering(USAXS),small-angle X-ray scattering(SAXS),in-situ heating X-ray diffraction(XRD),focused ion beam(FIB),and thermal analysis *** to the unique internal pores,the grain size of SP-A is smaller,and the coefficient of thermal expansion(CTE)is higher than that of traditional solid Ag *** a result,the sintering activity of SP-A is excellent,which can form a denser sintered body and form silver nanoparticles at the Ag–Si interface to improve silver silicon *** silicon solar cell built with SP-A obtained a low series resistance(Rs)and a high photoelectric conversion efficiency(PCE)of 19.26%.These fill a gap in Ag particle structure research,which is significant for the development of high-performance electronic Ag particles and efficient semiconductor devices.

关键词： silver particles small angle X-ray scattering(SAXS) pore size distribution in-situ heating X-ray diffraction(XRD) sintering silicon solar cells

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Detection of finger interruptions in silicon solar cells using photoluminescence imaging

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Chinese Physics B 2018年第6期27卷 554-559页

作者： Lei Zhang Peng Liang Hui-Shi Zhu Pei-De Han State Key Laboratory on Integrated Optoelectronics Institute of Semiconductors Chinese Academy of Sciences Beijing 100083 China School of Electronic Electrical and Communication Engineering University of Chinese Academy of Sciences Beijing 101407 China

Finger interruptions are common problems in screen printed solar cells, resulting in poor performance in efficiency because of high effective series resistance. Electroluminescence（EL） imaging is typically used to identify interrupted fingers. In this paper, we demonstrate an alternative method based on photoluminescence（PL） imaging to identify local series resistance defects, with a particular focus on finger interruptions. Ability to detect finger interruptions by using PL imaging under current extraction is analyzed and verified. The influences of external bias control and illumination intensity on PL images are then studied in detail. Finally, in comparison with EL imaging, the using of PL imaging to identify finger interruptions possesses the prominent advantages： in PL images, regions affected by interrupted fingers show higher luminescence intensity, while regions affected by recombination defects show lower luminescence intensity. This inverse signal contrast allows PL imaging to more accurately identify the defect types.

关键词： silicon solar cells luminescence defects series resistance

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Beyond Lambertian light trapping for large-area silicon solar cells:fabrication methods

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Opto-Electronic Advances 2022年第9期5卷 14-25页

作者： Jovan Maksimovic Jingwen Hu Soon Hock Ng Tomas Katkus Gediminas Seniutinas Tatiana Pinedo Rivera Michael Stuiber Yoshiaki Nishijima Sajeev John Saulius Juodkazis Optical Sciences Centre and ARC Training Centre in Surface Engineering for Advanced Materials(SEAM) School of ScienceSwinburne University of TechnologyHawthorn Vic 3122Australia Melbourne Centre for Nanofabrication ANFF Victoria151 Wellington Rd.Clayton Vic 3168 Australia Department of Electrical and Computer Engineering Graduate School of EngineeringYokohama National University79-5 TokiwadaiHodogaya-kuYokohama 240-8501Japan Institute of Advanced Sciences Yokohama National University79-5 TokiwadaiHodogaya-kuYokohama 240-8501Japan Department of Physics University of Toronto60 St.George StreetTorontoONM5S 1A7Canada World Research Hub Initiative(WRHI) School of Materials and Chemical TechnologyTokyo Institute of Technology2-12-1OokayamaMeguro-kuTokyo 152-8550Japan

Light trapping photonic crystal(PhC)patterns on the surface of Si solar cells provides a novel opportunity to approach the theoretical efficiency limit of 32.3%,for light-to-electrical power conversion with a single junction *** is beyond the efficiency limit implied by the Lambertian limit of ray trapping~29%.The interference and slow light effects are harnessed for collecting light even at the long wavelengths near the Si *** compare two different methods for surface patterning,that can be extended to large area surface patterning:1)laser direct write and 2)step-&-repeat 5×reduction projection *** area throughput limitations of these methods are compared with the established elec-tron beam lithography(EBL)route,which is conventionally utilised but much slower than the presented ***-tral characterisation of the PhC light trapping is compared for samples fabricated by different *** of Si etched via laser patterned mask was~7%at visible wavelengths and was comparable with Si patterned via EBL made *** later pattern showed a stronger absorbance than the Lambertian limit6.

关键词： silicon solar cells laser ablation light trapping Lambertian limit

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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(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

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MAiA-A NEW VERSATILE PECVD/ETCHING TOOL FOR PROCESSING CRYSTALLINE silicon solar cells

MAiA-A NEW VERSATILE PECVD/ETCHING TOOL FOR PROCESSING CRYST...

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第十届中国太阳能光伏会议

作者： M Uhlig D Decker A Lux M Richter G Khler HSchlemm K Roth M Grimm Roth ＆ Rau AG An der Baumschule 6-809337 Hohenstein-ErnstthalGermany

＜正＞Roth ＆ Rau is introducing the MAiA（Multiple Application inlinc Apparatus）,a new tool for processing silicon solar *** the silicon wafers become thinner and thinner and the number of steps in the manufacturing process of solar cells is increasing,handling of the wafers becomes much more *** the number of handling steps leads direct to a higher yield in a solar cell production *** this purpose we developed a versatile PECVD/etching tool where different deposition and dry etching steps can be carried out in one system without touching the wafers between the *** first systems for double-sided deposition have been delivered recently and are currently in the ramp-up phase of the solar cell production *** this paper we describe the concept of possible MAiA-tools in general and in detail for the already delivered deposition tools.＜正＞Roth ＆ Rau is introducing the MAiA（Multiple Application inlinc Apparatus）,a new tool for processing silicon solar *** the silicon wafers become thinner and thinner and the number of steps in the manufacturing process of solar cells is increasing,handling of the wafers becomes much more *** the number of handling steps leads direct to a higher yield in a solar cell production *** this purpose we developed a versatile PECVD/etching tool where different deposition and dry etching steps can be carried out in one system without touching the wafers between the *** first systems for double-sided deposition have been delivered recently and are currently in the ramp-up phase of the solar cell production *** this paper we describe the concept of possible MAiA-tools in general and in detail for the already delivered deposition tools.

关键词： PECVD deposition dry etching dielectric layers silicon solar cells

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Mechanism of photon-induced performance changes in silicon heterojunction solar cells

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Science China Materials 2024年第9期67卷 2873-2879页

作者： Qi Deng Haoran Ye Shenglei Huang Zehua Sun Yanyun Yang Lei Li Zhu Ma Rong Su Wei Long Fangdan Jiang Heng Guo Guoqiang Xing Wenzhu Liu Jian Yu School of New Energy and Materials Southwest Petroleum UniversityChengdu610500China Shanghai Institute of Microsystem and Information Technology Chinese Academy of Sciences(CAS)Shanghai201800China Tongwei solar(Chengdu)Ltd. Chengdu600200China School of Physics and Electronical Science Chuxiong Normal UniversityChuxiong675000China School of Physical Science and Technology ShanghaiTech UniversityShanghai201210China Tianfu Yongxing Laboratory Chengdu610213China

Short-wavelength ultraviolet(UV)photons adversely affect hydrogenated amorphous silicon thin films,as well as on silicon heterojunction(SHJ)solar cells and *** research examines the impact and mechanisms of photon-induced performance *** A exposure disrupts Si-H bonds,significantly reducing hydrogen content in both intrinsic and doped hydrogenated amorphous silicon(a-Si:H)*** disruption impairs the interface passivation effect,leading to the degradation of SHJ solar cells and modules,primarily indicated by a decrease in open-circuit voltage(V_(oc))and fill factor(FF).UV irradiation from the front side of SHJ solar cells reduces V_(oc)and FF by 1.38%and 2.28%,respectively,resulting in a 2.28%efficiency *** irradiated from the backside show decreases in V_(oc)and FF of approximately 1.96%and 2.73%,respectively,leading to an overall efficiency reduction of approximately 3.58%.However,subsequent light-soaking increases V_(oc)and FF by approximately 0.96%and 1.37%,respectively,for frontside-irradiated cells,achieving an overall efficiency improvement of approximately 2.51%.Thus,light-soaking effectively recovers performance losses caused by UV irradiation in SHJ solar *** research clarifies the mechanisms influencing the performance of a-Si:H thin films,SHJ solar cells,and modules under UV irradiation and light-soaking,offering significant contributions towards the development of highly efficient and reliable SHJ devices.

关键词： silicon solar cells heterojunction UV irradiation light soaking hydrogen content

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Analysis of an SME using silicon and Flexible Organic solar cells as Replacements for Fossil Fuel Sources of Electricity in UK and Iraq

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Journal of Environmental Science and Engineering(B) 2016年第4期5卷 173-178页

作者： Azad Azabany Ari Azabanee Khalid Khan Mahmood Shah Waqar Ahmed Lancashire Business School University of Central Lancashire Preston PR1 2HE United Kingdom School of Engineering University of Central Lancashire Preston PR1 2HE United Kingdom School of Medicine University of Central Lancashire Preston PR1 2HE United Kingdom

Currently, 86% of the energy originates from fossil fuelsforelectricity. These are expected to run out, causing severe environmental damage threatening future generations. The total impact of Small and Medium Enterprises （SMEs） on the economy is significant. solar cells harness the sun＇s energy to generate electricity in an environmentally friendly manner. This study compares silicon solar cells to flexible Organic Photovoltaic solar cells （OPV） for electricity energy for a micro-business in the UK and Iraq. It shows that it is feasible to replace existing fossil fuel sources with solar cells in Iraq due to a greater amount of solar radiation striking the earth＇s surface. Flexible solar cells can replace a proportion of the energy requirements in the UK and a larger proportion in Iraq. Using existing 20% efficient solar cells, 28% and 83% of the energy requirements of the microbusiness can be replaced in UK and Iraq respectively. Assuming 20% efficiency for solar cells placed on windows, 74% and 220% of the energy requirements of UK and Kurdistan can be replaced respectively and the surplus stored.

关键词： Energy management silicon solar cells flexible organic solar cells CO2 emissions Iraq United Kingdom.

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Analysis of silicon-based integrated photovoltaic–electrochemical hydrogen generation system under varying temperature and illumination

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Journal of Energy Chemistry 2017年第1期26卷 72-80页

作者： Vishwa Bhatt Brijesh Tripathi Pankaj Yadav Manoj Kumar Department of solar Energy School of TechnologyPandit Deendayal Petroleum UniversityGandhinagar 382007India Department of Science School of TechnologyPandit Deendayal Petroleum UniversityGandhinagar 382007India Department of Electrical Engineering Incheon National UniversityIncheon 406772Republic of Korea

Last decade witnessed tremendous research and development in the area of photo-electrolytic hydrogen generation using chemically stable nanostructured photo-cathode/anode materials. Due to intimately coupled charge separation and photo-catalytic processes, it is very difficult to optimize individual components of such system leading to a very low demonstrated solar-to-fuel efficiency (SFE) of less than 1%. Recently there has been growing interest in an integrated photovoltaic–electrochemical (PV–EC) system based on GaAs solar cells with the demonstrated SFE of 24.5% under concentrated illumination condition. But a high cost of GaAs based solar cells and recent price drop of poly-crystalline silicon (pc-Si) solar cells motivated researchers to explore silicon based integrated PV–EC system. In this paper a theoretical framework is introduced to model silicon-based integrated PV–EC device. The theoretical framework is used to analyze the coupling and kinetic losses of a silicon solar cell based integrated PV–EC water splitting system under varying temperature and illumination. The kinetic loss occurs in the range of 19.1%–27.9% and coupling loss takes place in the range of 5.45%–6.74% with respect to varying illumination in the range of 20–100 mW/cm2. Similarly, the effect of varying temperature has severe impact on the performance of the system, wherein the coupling loss occurs in the range of 0.84%–21.51% for the temperature variation from 25 to 50 °C. © 2016 Science Press

关键词： Electrochemical cells Electrochemical impedance spectroscopy Gallium arsenide Hydrogen production Nanostructured materials Polysilicon Semiconducting gallium silicon silicon solar cells solar power generation

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Application of millimeter-sized polymer cylindrical lens array concentrators in solar cells

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Chinese Physics B 2018年第5期27卷 551-557页

作者： Yao-Ju Zhang Yi-Jie Li Jie Lin Chao-Long Fang Si-Yuan Liu College of Physics and Electronic Information Engineering Wenzhou University Wenzhou 325035 China

A unique method is proposed to encapsulate solar cells and improve their power conversion efficiency by using a millimeter-sized cylindrical lens array concentrator. Millimeter-sized epoxy resin polymer（ERP） cylindrical lens array concentrators are fabricated by the soft imprint technique based on polydimethylsiloxane stamps. The photovoltaic measurements show that millimeter-sized ERP cylindrical lens array concentrators can considerably improve the power conversion efficiency of silicon solar cells. The validity of the proposed method is proved by the coupled optical and electrical simulations. The designed solar cell devices with the advantages of high-efficiency and convenient cleaning are very useful in practical applications.

关键词： millimeter-sized cylindrical array concentrator silicon solar cells high-efficiency soft imprint method

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N~+P常规硅太阳电池退火效应的研究

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厦门大学学报(自然科学版) 1987年第2期 180-186页

作者：陈昆刘士毅夏门大学物理学系

研究了扩散成结后的退火处理对N~+常规硅太阳电池性能的影响,结果表明退火处理能够提高太阳电池的转换效率,550℃左右退火后效率达到峰值;初步认为550℃左右的退火处理可使太阳电池基区和耗尽区内某种“基本”的深能级复合中心密度大幅... 详细信息

研究了扩散成结后的退火处理对N~+常规硅太阳电池性能的影响,结果表明退火处理能够提高太阳电池的转换效率,550℃左右退火后效率达到峰值;初步认为550℃左右的退火处理可使太阳电池基区和耗尽区内某种“基本”的深能级复合中心密度大幅度减小并使某些“非基本”的深能级复合中心消失,从而可恢复太阳电池基区少子扩散长度,减小耗尽区复合电流密度,提高太阳电池的转换效率。

关键词： Effects post-diffusion annealing silicon solar cells

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