Contact fabrication of emitter wrap-through back contact silicon solar cells
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United States of America Patent
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Issued Date -
Aug 11, 2005
app pub date -
Feb 3, 2005
filing date -
Feb 5, 2004
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
Back contact solar cells including rear surface structures and methods for making same. The rear surface has small contact areas through at least one dielectric layer, including but not limited to a passivation layer, a nitride layer, a diffusion barrier, and/or a metallization barrier. The dielectric layer is preferably screen printed. Large grid areas overlay the dielectric layer. The methods provide for increasing efficiency by minimizing p-type contact areas and maximizing n-type doped regions on the rear surface of a p-type substrate.
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