Investigate of TiO2and SnO2as electron transport layer for perovskite solar cells

Abstract

The present study aimed to synthesize and prepared an electron transport layer based on titanium isopropoxide, TiO2 paste and SnCl4:5H2O. An experimental investigation was used to describe the effect of TiO2 and SnO2 on the performance of perovskite solar cells based on the MAPbl3 perovskite active layer. The optical, morphological and electrical properties were studied using UV-Vis. spectrometer, field emission scanning electron microscope (FE-SEM) and current-voltage (J-V) curves respectively. (FE-SEM) images for C.TiO2, m.TiO2 and mix SnO2 with m.TiO2 refers that the surface of C.TiO2 is smooth and homogeneous with some crystals and for m.TiO2 has a homogenous layer with a small grain structure enhanced the surface area of the under-layer and improved the net efficiency of the cells. (C. TiO2/m. TiO2 200â mg/ml) given a better performance compared with other ETL layers. The optimized solar cell structure (FTO/compact TiO2/mesoporous TiO2 200â mg/ml/Perovskite/Spiro-ometad/Au) which gives a maximum power conversion efficiency (PCE) of 4.4% and filling factor 0.55.