4. Answer the following questions about solar cells where the integrated solar s

Question

4. Answer the following questions about solar cells where the integrated solar spectrum under AM0 conditions is as shown below. Assume that Vm Egq 0.5 V. 4 I, 0 0 4 Photon Energy (ev) (a) Calculate the ndem solar cell with E,- 1 .5 eV and E,-2.5 eV, given the above spectrum (b) Now, assume that under AM1.5 conditions, all incoming light with photon energies between 1.0 eV and 1.5 eV is absorbed in the atmosphere, but the photon flux at all other energies is unchanged compared to AMO. Redraw the integrated photon flux for the AM1.5 conditions. (c) Recalculate the efficiency of the solar cell at AM1.5 using the energy gaps from part (a). Does the efficiency increase, decrease or stay the same? Explain your answer.

Explanation / Answer

solar cell eficiency refers to the portion of energy in the form of sunlight that can be converted via photovoltaics into electricity.

it is used in a photovoltaic system in combination with latitude and climate.

for example a solar panel with 20% efficiency with an area of 1m2 will produce 200w.it will be more if the sun is more high in the sky.

it will be less in cloudy conditions.

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