3.4. Consequence of the back work function and the act of PSC
The variations show in the cell configuration CuO as HTL and TiO2 as ETL and Au as metal contacts are shown in figure 8. The difference of Voc, Jsc, Fill factor, and PCE of the FASnI3 constructedPSC with CuO as HTL and TiO2 as ETL is shown in figure 9. For different metal contact. The Voc increase with metalwork function Au, Cu, Ag, Pt and we attain high efficiency at Au design cell. FF and Jsc are also verified for the constructed cell.