A TiO2-based hybrid solar cell device fabricated by employing interfacial modification and morphology control strategies

Heterojunction interface properties are important in organic-inorganic hybrid solar cells. To improve the cell performance, it was regulated by introducing two triphenylamine-based modifiers and adjusting the morphology of TiO2. It showed that these strategies are beneficial to improving the chemical compatibility between inorganic and organic materials, inhibiting charge recombination and accelerating excitons dissociation efficiency. The power conversion efficiency of the device was improved from 0.17 % to 2.10 %. It was further optimized to 4.90 % by adjusting the morphology of TiO2 nanorods. The interfacial charge transfer/recombination dynamic mechanisms and the intrinsic factors were analyzed in detail by diverse electrochemical measurements.