We have this what we call band gap energy of a material. This means that when the sunlight hits the solar cell, not all of the sunlight will be converted into electricity. It converts only the lights that has photons. Because our solar cells requires a certain amount of energy, measured on electron volts (eV) and define by our materials which is about 1.1 eV for crystalline silicon. And if the photon has more energy the rest of the photons will likely not absorb by the cells. So it has a specific amount of photons required. And these are the main reasons on why we lost almost 70% of the energy.
We have this what we call band gap energy of a material. This means that when the sunlight hits the solar cell, not all of the sunlight will be converted into electricity. It converts only the lights that has photons. Because our solar cells requires a certain amount of energy, measured on electron volts (eV) and define by our materials which is about 1.1 eV for crystalline silicon. And if the photon has more energy the rest of the photons will likely not absorb by the cells. So it has a specific amount of photons required. And these are the main reasons on why we lost almost 70% of the energy.