The Effect of Zn (II) Containing Metal-Organic Frameworks on Perovskite Solar Cells

In this study, we use metal-organic frameworks (MOFs), TMU-60 ([Zn (OBA)(L*). DMF]L*=5,6-di(pyridine-4-yl)-1,2,3,4 – tetrahydropyrazine) (compound I), and TMU-60-Cd (compound II), with excellent conductivity as additives in perovskite solution. The presence of cadmium in the structure of TMU-60-Cd can significantly enhance the conductivity of the framework. These frameworks can transfer the electron between the structures. Therefore, the use of these frameworks in perovskite solar cells could have a positive effect on electron transfer. However due to the creation of a lot of voids during the formation of perovskite layer, the power-conversion efficiency (PCE) of resulting PCSs were weaker than the pristine PCS. The results revealed that using even small amounts of TMU-60, and TMU-60-Cd caused a significant reduction in PCE, and the short current densities (Jsc), while improving the stability of the perovskite film, and the device. The absorption, and morphology of the new perovskite layer was also studied by UV–Vis spectroscopy, FE-SEM, and XRD.