25% Efficiency Amorphous/Crystalline Heterostructure Solar Cells Based On N-Type Crystalline Silicon

In this work we describe in detail the process used to obtain high efficiency amorphous/ crystalline silicon heterostructure solar cells, based on n-type crystalline silicon substrate. Numerical simulations with the Analysis of Microelectronic and Photonic Structure (AMPS) program have been carried out to study the stacked TCO/ p-type a-Si:H/ buffer/n-type c-Si/buffer/n-type a-Si:H/Al heterojunction (HJ) silicon solar cells. The influence of various parameters such as thicknesses and doping concentrations of all layers were investigated leading to optimal values of the simulated devices. The results obtained are our best solar cell structures with 25.021% of efficiency and Fill Factor (FF) of 84.4%, respectively. The current density Jsc attains the value of 32.948mA/cm 2 and the open-circuit voltage Voc the value of 0.899V.