Abstract
The photovoltaic properties of TiO₂/ZrO₂ double electron transport layered perovskite solar cells were investigated based on the ZrO₂ layer thickness. Samples were fabricated with a glass/FTO/TiO₂/ZrO₂/ perovskite structure. The TiO2/ZrO₂ layer thickness ratio was confirmed to be 264/0, 228/168, 228/204, 270/242, and 282/288 nm, respectively, using an electron probe microanalyzer...... More

Abstract
The photovoltaic properties of perovskite solar cells (PSCs) were investigated by adding graphene oxide (GO) to the electron transport layer of TiO₂. The PSCs were fabricated with a glass/FTO/BL-TiO₂/meso-TiO₂ + GO/perovskite/HTL/Au electrode structure by adding various contents of GO (0.0, 0.3, 0.5 and 0.7 wt%) to the TiO₂ layer. To..... More