Hydrolysis preparation of the compact TiO_2 layer using metastable TiCl_4 isopropanol/water solution for inorganic–organic hybrid heterojunction perovskite solar cells

摘要

A hydrolysis process was applied to prepare the compact TiO_2 layer using the fresh metastable TiCl_4 isopropanol/water solution as the precursor solution for the preparation of the inorganic–organic hybrid heterojunction perovskite solar cells. The optimal compact TiO_2 layer prepared from the aqueous solution of 2 mol/L TiCl_4 diluted in isopropanol at 1: 3 by volume as precursor solution was uniform and with a film thickness of 126 nm. The corresponding perovskite solar cell gave a photovoltaic conversion efficiency of 10.61%.