| Popis: |
In this study we have examined by simulation the role of the front contact barrier heights Φb0 (barrier at TCO/P window layer interface), on the performances of a-Si:H/µc-Si:H based tandem solar cell. The numerical simulation has been carried out by using AMPS-1D (Analysis of Microelectronic and Photonic Structures) program. The output parameters of tandem solar cell, like open circuit voltage (VOC), fill factor (FF), short circuit current (JSC) and efficiency (Eff) are numerically calculated for different values of Φb0. The simulation results shown that the efficiency value increases from 9.07% until 11.60% when the front contact barrier height (Φb0) value increase from 1.1 eV to 1.4 eV. However, we achieved the best conversion efficiency of 12.33% with Φb0 equal to 1.9 eV and with a values of 60 nm and 1200 nm for thicknesses of top and bottom absorber layers, respectively. |
