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Commonly used terms in the Electrical industry.
photovoltaic
effect a photoelectric phenomenon in certain photorefractive crystals, for example, LiNbO3, BaTiO3, LiTaO3,in which the illumination of light leads to the generation of electric current along certain direction in the crystals. This leads to the accumulation of charges on the surfaces of the crystals, causing an open circuit voltage.
photovoltaics
conversion of insolation into DC electricity by means of solid state p-n junction diodes.