Nakamura Keisuke, Oshikiri Tomoya, Ueno Kosei, Wang Yongming, Kamata Yoshiomi, Kotake Yuki, Misawa Hiroaki
Department of Applied Chemistry & Institute of Molecular Science, National Chiao Tung University , 1001 Ta Hsueh R., Hsinchu 30010, Taiwan.
J Phys Chem Lett. 2016 Mar 17;7(6):1004-9. doi: 10.1021/acs.jpclett.6b00291. Epub 2016 Mar 3.
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 photocurrent 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.
我们已成功制备出由二氧化钛（TiO₂）/氧化镍（NiO）p-n结与金纳米颗粒（Au-NPs）组成的全固态等离子体光电转换器件，作为等离子体太阳能电池的原型器件。展示了全固态器件的晶体结构特性和光电性能。我们观察到，在退火处理过程中，NiO薄膜的晶体结构以及TiO₂/Au-NPs/NiO的界面结构发生了显著变化。此外，光电转换器件在可见光波长区域表现出等离子体诱导的光电流产生。光电流可能源于等离子体诱导的电荷分离。通过等离子体诱导电荷分离的光电转换特性与TiO₂/Au-NPs/NiO界面的形态密切相关。发现等离子体光电转换器件的长期稳定性非常高，因为即使在照射3天后仍观察到稳定的光电流。
