Solar Cells – What are they really..?- Subbu R Subramanian
The Photo Electric EffectWhen light waves of appropriate wave length hit an atom, theelectrons of the atom get excited. The excited electrons jump out of theorbit, making the atom an ion. This movement of Electrons causesElectric Current.Albert Einstein found this phenomenon in 1905. He was awardedNobel Price for Physics for this finding.
•Different element’s atoms get excited with different wavelengths of light . (different colour lights )Ex : Sodium with yellow band light, Potassium with greenband etc