CdSe-sensitized inorganic-organic heterojunction solar cells: The effect of molecular dipole interface modification and surface passivation

► We fabricated solar cells composed of mesoscopic TiO2/CdSe/P3HT (poly-3-hexylthiophene). ► 4-Methoxybenzenethiol (MBT) and ZnS passivation layer were used as interface modifiers. ► The interface modification results in improved charge injection or collection efficiency. ► The sequential interface modification by MBT and ZnS exhibits optimal performance.