Question

blue light of wavelength 475 nm falls on a silicon photocell whose band gap is 1.1 ev. what is the maximum fraction (as percent) of the light’s energy that can be converted into electrical power?

Answer 1

The maximum fraction of the blue light's energy that can be converted into electrical power on a silicon photocell is 32%.

Step-by-step explanation:

In this question, the student wants to calculate the maximum fraction of the blue light's energy that can be converted into electrical power on a silicon photocell whose band gap is 1.1 eV. To do this, we can refer to Figure 13.5, which shows the energy budget in a silicon PV cell. We can see that the maximum theoretical efficiency is 32%.

Therefore, the maximum fraction of the blue light's energy that can be converted into electrical power is 32%.