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

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

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Silver(Ag)paste is widely used in semiconductor metallization,especially in silicon solar cells.Ag powder is the material with the highest proportion in Ag paste.The morphology and structure of Ag powder are crucial which determine its characteristics,especially for the sintering activity.In 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 measurement.Due 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 particles.As 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 contact.Polycrystalline 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.

silver particlessmall angle X-ray scattering(SAXS)pore size distributionin-situ heating X-ray diffraction(XRD)sinteringsilicon solar cells

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

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School of Advanced Materials,Peking University,Shenzhen Graduate School,Shenzhen 518055,China

Institute of Advanced Science Facilities,Shenzhen 518107,China

Institute of Zhejiang University-Quzhou,Quzhou 324000,China

Institute of Materials Research(IMR),Tsinghua University,Tsinghua Shenzhen International Graduate School,Shenzhen 518055,China

School of Materials Science and Engineering,Harbin Institute of Technology(Shenzhen),Shenzhen 518055,China

Key Laboratory of Photochemistry,Institute of Chemistry,Chinese Academy of Sciences,Beijing 100190,China

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Soft Science Research Project of Guangdong ProvinceGuangdong Innovative Team ProgramGuangdong Province Major Talent Introducing Program

2017B0303010132013N0802021QN020687

2024

10.1007/s12274-023-6163-3

纳米研究(英文版)

纳米研究(英文版)

CSTPCD
ISSN：
年,卷(期)：2024.17(4)
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