GATE EC 2018 Set 1 — Question 54
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Electronic Devices → Optoelectronic Devices → Solar Cell Efficiency & Responsivity
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Question
A solar cell of area , operating at intensity, has a short circuit current of , and an open circuit voltage of . Assuming room temperature operation and thermal equivalent voltage of , the open circuit voltage (in volts, correct to two decimal places) at intensity is _______.
Correct answer
0.59 to 0.63
Solution
The open circuit voltage of a solar cell is given by:where is the short circuit current, which is directly proportional to the light intensity.Let at intensity ().
At intensity, the short circuit current is .The new open circuit voltage is:Substituting the given values ():Rounding to two decimal places, .
At intensity, the short circuit current is .The new open circuit voltage is:Substituting the given values ():Rounding to two decimal places, .
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