Determination of Series Resistance in CdSeTe/CdTe Solar Cells by the Jsc–Voc Method

While commonly used in Si solar cell characterization, the Suns– Vocmethod of determining series resistance (Rs) is rarely used for CdTe and its alloys. However, it is advantageous relative to the slope method–commonly used in the CdTe community–because it measures series resistance at the maximum power point, at which a solar cell operates. Using the self-consistent predecessor to $\mathrm{Suns}-\mathrm{V}_{\mathrm{oc}}, \mathrm{J}_{\mathrm{sc}}-\mathrm{V}_{\mathrm{oc}}$, we determine $\mathrm{R}_{\mathrm{s}}$ of two different $\mathrm{CdSeTe}/\mathrm{CdTe}$ solar cell structures to be 0.96 and 2.72 μcm2, with repeated measurements showing little deviation.