PRODUCTION OF SOLAR CELLS AND ESTIMATION OF ITS ELECTRICAL PARAMETERS FROM ITS EXPERIMENTAL CHARACTERIZATION
In this work, solar cells with Mo/CuInSe2/CdS/n+–ZnO structure were deposited and experimentally characterized by the I-V curve. From these results, the electrical parameters were estimated fitting, theoretically, the curve to determine the most important variables. The estimation was carried
out using the single and double diode models and comparing the curve that best fits. The estimated variables were photogenerated current (Iph), dark current of the diode (Is), series resistance (Rs), shunt resistance (Rp) and diode ideality factors (a1 and a2) according to each model of circuit taken for optimization. The adjustment of the current-voltage (I-V) and power-voltage (P-V) curves achieved with the double diode
model indicates that in the manufactured solar cells, interfacial states are present in the p-n junction, which decreases the efficiency of the device.
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