Properties of Plasmon-Induced Photoelectric Conversion on a TiO2/NiO p-n Junction with Au Nanoparticles

Hiroaki Misawa, Yuki Kotake, Kamata Yoshiomi, Yongming Wang, Ueno Kosei, Tomoya Oshikiri, Keisuke Nakamura

Research output: Contribution to journalArticle

39 Scopus citations

Abstract

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.
Original languageEnglish
Pages (from-to)1004-1009
Number of pages6
JournalJournal of Physical Chemistry Letters
Volume7
Issue number6
DOIs
StatePublished - 17 May 2016

Keywords

  • ATOMIC LAYER DEPOSITION; ENHANCED PHOTOCURRENT GENERATION; SENSITIZED SOLAR-CELLS; NICKEL-OXIDE FILMS; WATER OXIDATION; THIN-FILMS; LOW-COST; NIO; PEROVSKITES

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