Hydrothermal synthesis of ZnO nanorod arrays with the addition of polyethyleneimine and TiO, encapsulated ZnO nanorod arrays for dye-sensitized solar cells The adsorption behavior of anionic dye onto bentonite materials

摘要

The performance of dye-sensitized solar cells based on ZnO nanorods films and ZnO coated with TiO, nanoparticles prepared by sol-gel deposition are described. It is found that adding Polyethyleneimine (PEI) into the grow solution affected the diameter of the ZnO nanorod. Increasing the thickness of nanorod array films and encapsulating ZnO nanorods with TiO, nanoparticles could improve cell short circuit current density (Jsc) and photovoltaic conversion efficiency (η). The TiO, shell acted as insulating barriers to decrease the rate of electron recombination.