Typical solar cell efficiency is

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UKPSC JE Electrical 2013 Official Paper II (Held on 7 Nov 2015)
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  1. Less than 5%
  2. 12% to 25%
  3. 30% to 40%
  4. More than 50%

Answer (Detailed Solution Below)

Option 2 : 12% to 25%
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Maximum efficiency of practically used solar cells is about 20%

The highest efficiency of solar cell achieved till date is 46%

The efficiency of a solar cell is determined as the fraction of incident power which is converted to electricity and is defined as:

\(\eta = \frac{{({V_{oc}}{I_{SC}})\left( {F.F} \right)}}{{{P_{in}}}}\)

Where:

  • Voc is the open-circuit voltage
  • Isc is the short-circuit current
  • FF is the fill factor
  • η is the efficiency
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