Why is a four-wire measurement important in a solar cell test?

The relationship between the two might need to be adjusted for the resistances of the wires, as in the example we described above, but overall the four-wire measurement is a way to accurately get current and voltage information of a device. A Kelvin or four-wire measurement is essential to getting accurate IV data while testing a solar cell.

How does a 4 wire solar cell work?

With the four-wire method, a voltage is sourced across the solar cell using one pair of test leads (between Force HI and Force LO), and the voltage drop across the cell is measured across a second set of leads (across Sense HI and Sense WWW.TEK.COM | 5

How do you test a solar cell?

A Kelvin or four-wire measurement is essential to getting accurate IV data while testing a solar cell. A variable load is applied across the four wires in order to get a variety of current and voltage measurements for the device under test. Exactly what current and voltage is unknown until tested, which is why there is some iteration needed.

How does a 4200a-scs test a solar cell?

Conclusion Measuring the electrical characteristics of a solar cell is critical for determining the device’s output performance and efficiency. The 4200A-SCS simplifies cell testing by automating the I-V, C-V, pulsed I-V, and resistivity measurements and provides graphics and analysis capability.

How do I choose a solar cell contacting scheme?

No explicit standard exists for the design of the solar cell contacting scheme. The IEC 60904-1 recommends a four-wire connection at the cell busbars, and a note in this standard states that it is advisable to choose the contacting method appropriate to the intended use of the cell or of the measurement.

How do you connect a solar cell to a cathode?

When connecting the leads to the solar cell, notice that the Force LO and Sense LO connections are made to the cathode terminal. The Force HI and Sense HI connections are made to the anode. Make the connections as close as possible to the cell to prevent the resistance of the solar cell’s terminals from affecting the measurement accuracy.