| METALS AND METAL MATRIX COMPOSITES |
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| A Facile Solution Method for the Preparation of Spherical Silver Particles for the Applications of Solar Cells |
| YE Hui, SHEN Tiancheng, CHEN Yuanzhi, XU Jin*
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| College of Materials, Xiamen University, Xiamen 361000, Fujian, China |
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Abstract Spherical silver particles with an average diameter of (1.88±0.25) μm were prepared by a chemical solution approach using silver nitrate as precursor and ascorbic acid as reducing agent in the assistance of several surfactants. The effects of the surfactants on the morphology and size distribution were investigated. The results showed that tri-sodium citrate could promote the formation of silver nanoflakes. When the mass ratio of Arabic gum, polyvinylpyrrolidenone and polyethylene glycol 4000 was 4∶1∶1, the silver nanoflakes could be self-assembled to micron-sized silver particles with smooth surface and uniform particle size distribution. The reducing ability of ascorbic acid increased with increasing pH value. The as-prepared silver particles were mixed with organic carrier and glass powders to form a paste which was then screen-printed on a silicon substrate and sintered at 850 ℃ to form a conductive thick film with a resistivity of 3.11 μΩ·cm.
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Published:
Online: 2024-01-16
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| Fund:National Natural Science Foundation of China (50902116). |
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2024, Vol. 38 
