Low-temperature hydrothermal synthesis of flower-like ZnO microstructure and nanorod array on nanoporous TiO2 film

A novel ZnO architecture, with flower-like microstructure on the top layer and nanorod arrays on the bottom layer, was hydrothermally synthesized on the Fluorine-doped SnO2 (FTO) conducting glass pre-coated with nanoporous TiO2 film. The as-prepared architecture was characterized with Field-emission scanning electron microscopy (FE-SEM) and X-ray diffractometer (XRD). Dye-sensitized solar cell studies showed that the power conversion efficiency (η) was 1.26% for this novel ZnO architecture-covered TiO2 electrode.