We have successfully fabricated all-solid-state plasmonic photoelectric conversion devices composed of titanium dioxide (TiO2)/nickel oxide (NiO) p-n junctions with gold nanoparticles (Au-NPs) as prototype devices for a plasmonic solar cell. The characteristics of the crystal structures and the photoelectric properties of the all-solid-state devices were demonstrated. We observed that the crystalline structure of the NiO thin film and the interfacial structure of TiO2/Au-NPs/NiO changed significantly during an annealing treatment. Furthermore, the photoelectric conversion devices exhibited plasmon-induced photocurrent generation in the visible-wavelength region. The photo current may result from plasmon-induced charge separation. The photoelectric conversion properties via plasmon-induced charge separation were strongly correlated with the morphology of the TiO2/Au-NPs/NiO interface. The long-term stability of the plasmonic photoelectric conversion device was found to be very high because a stable photocurrent was observed even after irradiation for 3 days.
- ATOMIC LAYER DEPOSITION; ENHANCED PHOTOCURRENT GENERATION; SENSITIZED SOLAR-CELLS; NICKEL-OXIDE FILMS; WATER OXIDATION; THIN-FILMS; LOW-COST; NIO; PEROVSKITES
Misawa, H., Kotake, Y., Yoshiomi, K., Wang, Y., Kosei, U., Oshikiri, T., & Nakamura, K. (2016). Properties of Plasmon-Induced Photoelectric Conversion on a TiO2/NiO p-n Junction with Au Nanoparticles. Journal of Physical Chemistry Letters, 7(6), 1004-1009. https://doi.org/10.1021/acs.jpclett.6b00291