Non-Destructive Contact Resistivity Measurements on Solar Cells Using the Circular Transmission Line Method

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We have developed a new tool to measure the contact resistance and sheet resistance of solar cells in a nondestructive and novel manner. With a simple change in the artwork for the metallization, small circular structures can be hidden within the busbars of the solar cells to enable the measurements with no impact on cell efficiency or aesthetics following the soldering of wires over the busbars.

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