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Capitalizing on the Glass-Etching Effect of Silver Plating Chemistry to Contact Si Solar Cells With Homogeneous 100–110 \Omega /\hbox {sq} Emitters

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8 Author(s)
Abasifreke Ebong ; Department of Electrical and Computer Engineering, University of North Carolina, Charlotte, NC, USA ; Ian B. Cooper ; Brian C. Rounsaville ; Ajeet Rohatgi
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Homogeneous high-sheet-resistance emitter (HHSE), excellent surface passivation, and high-quality contacts, along with narrow gridlines, are needed for high-efficiency solar cells. However, HHSE in conjunction with screen-printed (SP) contacts often gives low fill factor (FF) because of high contact resistance. We capitalized on the glass-etching property of light-induced plating of silver to decrease the contact resistance and formed high-quality contacts to 100-110 Ω/sq HHSE. This led to the achievement of 78.5% FF, 38.3 mA/cm2 short-circuit current density (JSC) due to narrow line widths (65 μm), and efficiency of 18.7%.

Published in:

IEEE Electron Device Letters  (Volume:32 ,  Issue: 6 )