%0 Journal Article %T INVESTIGATION OF InGaN/Si DOUBLE JUNCTION TANDEM SOLAR CELLS %A F. Bouzid %A L. Hamlaoui %J Journal of Fundamental and Applied Sciences %D 2012 %I El Oued University %X In this work, the solar power conversion efficiency of InGaN/Si double junction tandem solar cells was investigated under 1-sun AM1.5 illumination, using realistic material parameters. With this intention, the current-voltage curves are calculated for different front recombination velocities and the influence of the bottom cell thickness on efficiency has been studied. The results show that a front recombination velocity value of 1e3cm/s is most advantageous and the use of relatively thick bottom cell is necessary to obtain conversion efficiency greater than 27%, at 300¡ãk cell temperature. This efficiency will decrease as the operating temperature increase. %K Photovoltaic %K Efficiency %K Carrier lifetimes %K Recombination velocity %K Temperature. %U http://jfas.info/index.php/JFAS/article/view/44/pdf