Solar photovoltaic solar cells is the basis and core of a photovoltaic effect using the optical device can change the energy, also known as photovoltaic devices. With the appropriate wavelength of light shines on some of the material, its absorption of light energy generated at both ends after the electromotive force, known as the photovoltaic effect. This phenomenon in the liquid and solid substances will occur. However, only in solids, especially in semiconductors, have high energy conversion efficiency. Therefore, it has often referred to as semiconductor solar cell solar cells. It is a physical battery, the light energy into electrical energy can be divided into three main processes: ① After absorbing some energy photons to produce electron – hole pairs (called “photo-carrier”); ② opposite electrical light-induced carriers are generated by a semiconductor junction separated from the electrostatic field; ③ photogenerated carriers are collected by solar poles, Satellite L510 battery and the current generated outside the circuit to gain power.

Solar cells as early as 1954, Chapin and others from the pn junction with Si, made practical use of solar cells are mostly made of raw materials are made of silicon. To take advantage of the photoelectric effect to convert solar energy efficient energy, components must be present within the barrier. Therefore, solar cells typically have a pn junction diode, Schottky diode, or metal – oxide – semiconductor (MOS) diode structure.

Solar cell development to date, has a wide range of forms of all kinds.