Discussion Questions: Inside a Solar Cell
- Why do you think solar cell arrays are a dark color?
- Why is it necessary to dope the two silicon layers of a photovoltaic cell with either boron or phosphorus? What happens when the two layers of silicon—the phosphorous-doped layer and the boron-doped layer—are joined?
- How do photons of sunlight cause a photovoltaic cell to generate electricity? What do you think happens to the photon energy that is not converted to electrical current?
- What type of current is generated in a PV cell: alternating current (AC) or direct current (DC)? Why do you think an inverter is necessary if the solar cell will be used to power a house?