Silicon solar cell power generation principle
The expected efficiency of the theory is 24% .As the semiconductor PN junction device in the sun under the photoelectric conversion efficiency of the highest, so these photovoltaic devices are usually referred to as solar cells, also known as photovoltaic cells or solar cells.
When the junction of two different materials formed by the light irradiation, the process of generating electromotive force.The process of the first material absorbs the energy of the photon, resulting in equal number of positive and negative charge, then these charges were migrated to both sides of the knot, The formation of even electricity layer. Although the effect is not generated instantaneous, but the response time is quite short.
In the case of homogeneous semiconducting materials; one is at the interface of the semiconductor. Although there are some similarities between them, the specific mechanisms that produce these two effects are not the same. ], And the meaning of the photovoltaic effect is confined to the latter case.
Refers to the phenomenon of the object due to the absorption of photons and the phenomenon of electromotive force, when the object is subject to light, the object within the charge distribution state changes in the electromotive force and current generated an effect. Strictly speaking, including two types:
