2. (10 pts) A solar cell under illumination has the current-voltage (I-V) charac

Question

2. (10 pts) A solar cell under illumination has the current-voltage (I-V) characteristic below. The light intensity is 100 mWlcm'. The cell area is 100 cm2. From this plot, extract the following: (a) The open circuit voltage, Voc (b) The short circuit current, Isc (c) The maximum optical to electrical 3 Max conversion efficiency of the cell. (d) How many of these solar cells need to be connected in series to produce an output voltage of at least 48 volts? 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 voltage (V)

Explanation / Answer

from the plot

a) open circuit voltage=0.6

b) short circuit current=2.8 amps

c) fill factor=(Vm*Im)/(Voc*Isc)=(0.5*2.6)/(0.6*2.8)=0.7738

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