THE VARIATION OF THE CURRENT IN AUGER EFFECT INTERMEDIATE BAND SOLAR CELLS DUE TO THE INTERMEDIATE BAND LEVEL

Intermediate band solar cell (ibsc) has a structure that improves the photo-current and efficiency without degrading the output voltage by absorbing the sub-bandgap photons through its intermediate band (ib) inserted inside its forbidden gap. ib should be positioned to an optimum level to achieve the desired efficiency improvement in ibscs. in this study, the variation of ibsc current due to the ib level is investigated in the cases of overlap and nonoverlap, under the condition of equal and nonequal absorption coefficients for three different auger effected abgp and it is obtained that the efficiency is maximum at the point where the current is maximum. the optimum ib levels are also obtained at the same point. besides, it is obtained that the currents generated through the ib should be equal to each other to provide maximum current and efficiency.