“…The higher efficiency for PSCs demonstrated in tandem configurations. [15,16] Currently, the most commonly used electron transporting materials (ETM) are TiO 2 , [17,18] ZnO, [19,20] and PCBM [21,22] whereas the most efficient p-type organic contacts are Spiro-MeOTAD, [5] PEDOT:PSS [22] and also inorganic ones such as CuI, [23] CuSCN, [24] Cu 2 O, [25] and NiO x . [26][27][28][29][30][31] In the PSCs architecture, using inorganic materials as an ETM and HTM propose higher durability, mechanical stability, and possibility to reach robust and low-cost solar cells rather than organic ones.…”