<b>Effect of Temperature on the Electric Power of Si, InAs and GaAs Based Solar Cells</b> The electrical power is a nominal quantity which indicates the performance of the solar panels. It depends on the sunshine and also on the properties of the material used. In this work we are interested in the properties of materials to study the evolution of electrical power as a function of the temperature of the following cells based on Si silicon, InAs indium arsenide and GaAs gallium arsenide . Power, Photo voltage, vertical junction solar cell, temperature 10-12 Issue-3 Volume-4 Nfally Dieme | Moustapha Sane | Prince Abdoul Aziz Honadia | Fabé. Idrissa Barro